blabla/PATSTAT/CPC_data/CPCSchemeXML202302/cpc-scheme-F23N.xml

<?xml version="1.0" encoding="UTF-8"?>
<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="F23N" definition-exists="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>REGULATING OR CONTROLLING COMBUSTION </text><reference><text>control devices specially adapted for combustion apparatus in which combustion takes place in a fluidised bed of fuel or other particles <class-ref scheme="cpc">F23C10/28</class-ref>; condition responsive controls for regulating combustion in domestic stoves with open fires for solid fuel <class-ref scheme="cpc">F24B1/187</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="F23N1/00" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/00</classification-symbol>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F23N1/00" definition-exists="true" ipc-concordant="F23N1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Regulating fuel supply</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N1/002" definition-exists="false" ipc-concordant="F23N1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F23N1/002</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>using electronic means </text><reference><text><class-ref scheme="cpc">F23N1/04</class-ref>&#160;-&#160;<class-ref scheme="cpc">F23N1/10</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N1/005" definition-exists="false" ipc-concordant="F23N1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F23N1/005</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means </text><reference><text><class-ref scheme="cpc">F23N1/04</class-ref>&#160;-&#160;<class-ref scheme="cpc">F23N1/10</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N1/007" definition-exists="false" ipc-concordant="F23N1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F23N1/007</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>using mechanical means </text><reference><text><class-ref scheme="cpc">F23N1/04</class-ref>&#160;-&#160;<class-ref scheme="cpc">F23N1/10</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N1/02" definition-exists="false" ipc-concordant="F23N1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>conjointly with air supply</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N1/022" definition-exists="false" ipc-concordant="F23N1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N1/025" definition-exists="false" ipc-concordant="F23N1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N1/027" definition-exists="false" ipc-concordant="F23N1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N1/04" definition-exists="false" ipc-concordant="F23N1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>conjointly with air supply and with draught</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N1/042" definition-exists="false" ipc-concordant="F23N1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N1/045" definition-exists="false" ipc-concordant="F23N1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N1/047" definition-exists="false" ipc-concordant="F23N1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N1/06" definition-exists="false" ipc-concordant="F23N1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>conjointly with draught</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N1/062" definition-exists="false" ipc-concordant="F23N1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N1/065" definition-exists="false" ipc-concordant="F23N1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N1/067" definition-exists="false" ipc-concordant="F23N1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/067</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N1/08" definition-exists="false" ipc-concordant="F23N1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>conjointly with another medium, e.g. boiler water</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N1/082" definition-exists="false" ipc-concordant="F23N1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N1/085" definition-exists="false" ipc-concordant="F23N1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N1/087" definition-exists="false" ipc-concordant="F23N1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N1/10" definition-exists="false" ipc-concordant="F23N1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>and with air supply or draught</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N1/102" definition-exists="false" ipc-concordant="F23N1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N1/105" definition-exists="false" ipc-concordant="F23N1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N1/107" definition-exists="false" ipc-concordant="F23N1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N1/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F23N3/00" definition-exists="true" ipc-concordant="F23N3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N3/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Regulating air supply or draught </text><reference><text>conjointly with fuel supply <class-ref scheme="cpc">F23N1/00</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N3/002" definition-exists="false" ipc-concordant="F23N3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F23N3/002</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>using electronic means </text><reference><text><class-ref scheme="cpc">F23N3/02</class-ref>&#160;-&#160;<class-ref scheme="cpc">F23N3/08</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N3/005" definition-exists="false" ipc-concordant="F23N3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F23N3/005</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means </text><reference><text><class-ref scheme="cpc">F23N3/02</class-ref>&#160;-&#160;<class-ref scheme="cpc">F23N3/08</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N3/007" definition-exists="false" ipc-concordant="F23N3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F23N3/007</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>using mechanical means </text><reference><text><class-ref scheme="cpc">F23N3/02</class-ref>&#160;-&#160;<class-ref scheme="cpc">F23N3/08</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N3/02" definition-exists="false" ipc-concordant="F23N3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N3/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Regulating draught by direct pressure operation of single valves or dampers</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N3/04" definition-exists="false" ipc-concordant="F23N3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N3/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by operation of single valves or dampers by temperature sensitive elements</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N3/042" definition-exists="false" ipc-concordant="F23N3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N3/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N3/045" definition-exists="false" ipc-concordant="F23N3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N3/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N3/047" definition-exists="false" ipc-concordant="F23N3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N3/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N3/06" definition-exists="true" ipc-concordant="F23N3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N3/06</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>by conjoint operation of two or more valves or dampers </text><reference><text>by power-assisted systems <class-ref scheme="cpc">F23N3/08</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N3/065" definition-exists="false" ipc-concordant="F23N3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N3/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N3/08" definition-exists="false" ipc-concordant="F23N3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N3/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by power-assisted systems</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N3/082" definition-exists="false" ipc-concordant="F23N3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N3/082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N3/085" definition-exists="false" ipc-concordant="F23N3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N3/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N3/087" definition-exists="false" ipc-concordant="F23N3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N3/087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F23N5/00" definition-exists="true" ipc-concordant="F23N5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N5/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Systems for controlling combustion </text><reference><text>regulating fuel supply <class-ref scheme="cpc">F23N1/00</class-ref>, regulating air supply or draught <class-ref scheme="cpc">F23N3/00</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N5/003" definition-exists="false" ipc-concordant="F23N5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F23N5/003</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>using detectors sensitive to combustion gas properties </text><reference><text><class-ref scheme="cpc">F23N5/02</class-ref>, <class-ref scheme="cpc">F23N5/18</class-ref>&#160;-&#160;<class-ref scheme="cpc">F23N5/26</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/006" definition-exists="false" ipc-concordant="F23N5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the detector being sensitive to oxygen</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N5/02" definition-exists="false" ipc-concordant="F23N5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using devices responsive to thermal changes or to thermal expansion of a medium</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/022" definition-exists="false" ipc-concordant="F23N5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F23N5/022</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>using electronic means </text><reference><text><class-ref scheme="cpc">F23N5/04</class-ref>&#160;-&#160;<class-ref scheme="cpc">F23N5/14</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/027" definition-exists="false" ipc-concordant="F23N5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F23N5/027</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>using mechanical means </text><reference><text><class-ref scheme="cpc">F23N5/04</class-ref>&#160;-&#160;<class-ref scheme="cpc">F23N5/14</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/04" definition-exists="false" ipc-concordant="F23N5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using bimetallic elements</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N5/042" definition-exists="false" ipc-concordant="F23N5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N5/045" definition-exists="false" ipc-concordant="F23N5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N5/047" definition-exists="false" ipc-concordant="F23N5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/06" definition-exists="false" ipc-concordant="F23N5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using bellows</text></title-part><title-part><text>using diaphragms</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N5/062" definition-exists="false" ipc-concordant="F23N5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N5/065" definition-exists="false" ipc-concordant="F23N5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N5/067" definition-exists="false" ipc-concordant="F23N5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/067</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/08" definition-exists="false" ipc-concordant="F23N5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using light-sensitive elements</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N5/082" definition-exists="false" ipc-concordant="F23N5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N5/085" definition-exists="false" ipc-concordant="F23N5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N5/087" definition-exists="false" ipc-concordant="F23N5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/10" definition-exists="false" ipc-concordant="F23N5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using thermocouples</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N5/102" definition-exists="false" ipc-concordant="F23N5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N5/105" definition-exists="false" ipc-concordant="F23N5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N5/107" definition-exists="false" ipc-concordant="F23N5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F23N5/107</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>using mechanical means, e.g. safety valves</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/12" definition-exists="true" ipc-concordant="F23N5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N5/12</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>using ionisation-sensitive elements, i.e. flame rods</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N5/123" definition-exists="false" ipc-concordant="F23N5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N5/126" definition-exists="false" ipc-concordant="F23N5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/126</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/14" definition-exists="false" ipc-concordant="F23N5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using thermo-sensitive resistors</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N5/143" definition-exists="false" ipc-concordant="F23N5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/143</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F23N5/146" definition-exists="false" ipc-concordant="F23N5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/146</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N5/16" definition-exists="false" ipc-concordant="F23N5/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using noise-sensitive detectors</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N5/165" definition-exists="false" ipc-concordant="F23N5/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N2005/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with ultrasonic means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N5/18" definition-exists="false" ipc-concordant="F23N5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using detectors sensitive to rate of flow of air or fuel</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N5/181" definition-exists="false" ipc-concordant="F23N5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N2005/181</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using detectors sensitive to rate of flow of air</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F23N5/182" definition-exists="false" ipc-concordant="F23N5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N2005/182</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Air flow switch</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/184" definition-exists="false" ipc-concordant="F23N5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/184</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N5/185" definition-exists="false" ipc-concordant="F23N5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N2005/185</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using detectors sensitive to rate of flow of fuel</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/187" definition-exists="false" ipc-concordant="F23N5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/187</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/188" definition-exists="false" ipc-concordant="F23N5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/188</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N5/20" definition-exists="false" ipc-concordant="F23N5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with a time programme acting through electrical means, e.g. using time-delay relays</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/203" definition-exists="false" ipc-concordant="F23N5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/203</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/206" definition-exists="false" ipc-concordant="F23N5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/206</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N5/22" definition-exists="false" ipc-concordant="F23N5/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with a time programme acting through mechanical means, e.g. using cams</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N5/24" definition-exists="false" ipc-concordant="F23N5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F23N5/24</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Preventing development of abnormal or undesired conditions, i.e. safety arrangements </text><reference><text><class-ref scheme="cpc">F23N5/02</class-ref>&#160;-&#160;<class-ref scheme="cpc">F23N5/18</class-ref> take precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/242" definition-exists="false" ipc-concordant="F23N5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/245" definition-exists="false" ipc-concordant="F23N5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrical or electromechanical means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/247" definition-exists="false" ipc-concordant="F23N5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F23N5/26" definition-exists="false" ipc-concordant="F23N5/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F23N5/265" definition-exists="false" ipc-concordant="F23N5/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N5/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electronic means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="F23N221/00" date-revised="2020-01-01" status="published"><classification-symbol>F23N2221/00</classification-symbol>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F23N221/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2221/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Pretreatment or prehandling</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N221/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2221/02</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>using belt conveyors</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N221/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2221/04</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Preheating liquid fuel</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N221/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2221/06</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Preheating gaseous fuel</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N221/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2221/08</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Preheating the air</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N221/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2221/10</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Analysing fuel properties, e.g. density, calorific</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N221/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2221/12</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Recycling exhaust gases</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F23N223/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Signal processing</text></title-part><title-part><text>Details thereof</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/02</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Multiplex transmission</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/04</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Memory</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/06</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Sampling</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/08</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Microprocessor</text></title-part><title-part><text>Microcomputer</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/10</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Correlation</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/12</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Integration</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/14</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Differentiation</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/16</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Measuring bridge</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/18</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Chopper</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/20</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Opto-coupler</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/22</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Timing network</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N223/24" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/24</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>with bimetallic elements</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N223/26" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/26</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>with capacitors</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N223/28" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/28</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>with more than one timing element</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/30</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Switches</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N223/32" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/32</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Reed switches</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/34" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/34</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>with feedforward processing</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/36" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/36</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>PID signal processing</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/38" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/38</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Remote control</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/40</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Simulation</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/42</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Function generator</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/44" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/44</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Optimum control</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/46" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/46</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Identification</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/48" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/48</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Learning / Adaptive control</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/50</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Human control</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/52" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/52</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Fuzzy logic</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N223/54" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2223/54</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Recording</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F23N225/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Measuring</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N225/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/02</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>filling height in burners</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N225/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/04</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>pressure</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N225/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/06</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for determining flow</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N225/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/08</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>temperature</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N225/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/10</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>stack temperature</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N225/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/12</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>room temperature</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N225/13" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/13</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>outdoor temperature</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N225/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/14</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Ambient temperature around burners</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N225/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/16</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>burner temperature</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N225/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/18</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>feedwater temperature</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N225/19" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/19</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>outlet temperature water heat-exchanger</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N225/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/20</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>entrant temperature</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N225/21" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/21</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>outlet temperature</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N225/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/22</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>heat losses</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N225/24" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/24</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>indicated in an amount of money</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N225/26" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/26</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>humidity</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N225/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2225/30</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>measuring lambda</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F23N227/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Ignition or checking</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N227/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/02</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Starting or ignition cycles</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N227/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/04</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Prepurge</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N227/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/06</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Postpurge</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N227/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/08</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Hold fire apparatus</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N227/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/10</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Sequential burner running</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N227/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/12</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Burner simulation or checking</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N227/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/14</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Flame simulation</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N227/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/16</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Checking components, e.g. electronic</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N227/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/18</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Applying test signals, e.g. periodic</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N227/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/20</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Calibrating devices</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N227/22" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/22</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Pilot burners</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N227/24" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/24</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>the pilot burner not burning continuously</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N227/26" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/26</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>comprising two or more distinct pilot burners</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N227/28" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/28</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Ignition circuits</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N227/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/30</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for pilot burners</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N227/32" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/32</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Igniting for a predetermined number of cycles</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N227/34" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/34</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Continuously applied ignition cycles</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N227/36" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/36</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Spark ignition, e.g. by means of a high voltage</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N227/38" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/38</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Electrical resistance ignition</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N227/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/40</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Catalytic ignition</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N227/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2227/42</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Ceramic glow ignition</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F23N229/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2229/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Flame sensors</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N229/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2229/02</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Pilot flame sensors</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N229/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2229/04</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>sensitive to the colour of flames</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N229/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2229/06</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>with periodical shutters</text></title-part><title-part><text>Modulation signals</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N229/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2229/08</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>detecting flame flicker</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N229/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2229/10</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>comprising application of periodical fuel flow fluctuations</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N229/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2229/12</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>with flame rectification current detecting means</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N229/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2229/14</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>using two or more different types of flame sensor</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N229/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2229/16</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>using two or more of the same types of flame sensor</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N229/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2229/18</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Flame sensor cooling means</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N229/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2229/20</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Camera viewing</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N229/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2229/22</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>the sensor&apos;s sensitivity being variable</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F23N231/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2231/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Fail safe</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N231/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2231/02</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>using electric energy accumulators</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N231/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2231/04</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for electrical power failures</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N231/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2231/06</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for flame failures</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N231/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2231/08</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for pilot flame failures</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N231/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2231/10</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for component failures</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N231/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2231/12</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for ignition failures</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N231/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2231/14</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for earthquakes</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N231/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2231/16</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>using melting materials or shape memory alloys</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N231/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2231/18</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Detecting fluid leaks</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N231/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2231/20</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Warning devices</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N231/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2231/22</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>using warning lamps</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N231/24" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2231/24</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Freezing</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N231/26" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2231/26</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for clogging air inlet</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N231/28" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2231/28</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>preventing flash-back or blow-back</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N231/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2231/30</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Representation of working time</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F23N233/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2233/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Ventilators</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N233/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2233/02</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>in stacks</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N233/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2233/04</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>with variable speed</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N233/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2233/06</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>at the air intake</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N233/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2233/08</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>with variable speed</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N233/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2233/10</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>forcing air through heat exchangers</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F23N235/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2235/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Valves, nozzles or pumps</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N235/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2235/02</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Air or combustion gas valves or dampers</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N235/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2235/04</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>in stacks</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N235/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2235/06</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>at the air intake</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N235/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2235/08</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>used with heat exchanges</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N235/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2235/10</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>power assisted, e.g. using electric motors</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N235/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2235/12</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Fuel valves</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N235/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2235/14</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>electromagnetically operated</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N235/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2235/16</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>variable flow or proportional valves</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N235/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2235/18</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Groups of two or more valves</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N235/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2235/20</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Membrane valves</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N235/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2235/22</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>cooperating with magnets</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N235/24" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2235/24</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Valve details</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N235/26" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2235/26</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Fuel nozzles</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N235/28" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2235/28</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Spray fuel nozzles</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N235/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2235/30</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Pumps</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F23N237/00" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2237/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Controlling</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N237/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2237/02</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>two or more burners</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N237/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2237/04</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>at two or more different localities</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N237/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2237/06</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>two predeterming temperatures, e.g. day-night</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N237/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2237/08</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>two or more different types of fuel simultaneously</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N237/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2237/10</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>High or low fire</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N237/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2237/12</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>catalytic burners</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N237/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2237/14</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>burners with gasification or vaporizer elements</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N237/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2237/16</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>secondary air</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N237/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2237/18</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>fluidized bed burners</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N237/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2237/20</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>one or more bypass conduits</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N237/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2237/22</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>water injection</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N237/24" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2237/24</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>height of burner</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N237/26" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2237/26</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>oxygen-air ratio</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N237/28" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2237/28</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>oxygen as pure oxydant</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N237/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2237/30</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>matrix burners</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F23N237/32" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2237/32</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Nox</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F23N239/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2239/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Fuels</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N239/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2239/02</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Solid fuels</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N239/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2239/04</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Gaseous fuels</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N239/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2239/06</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Liquid fuels</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F23N241/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2241/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Applications</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N241/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2241/02</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Space-heating</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N241/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2241/04</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Heating water</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N241/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2241/06</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Space-heating and heating water</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N241/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2241/08</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Household apparatus</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N241/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2241/10</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Generating vapour</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N241/11" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2241/11</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Torches</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N241/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2241/12</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Stack-torches</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N241/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2241/14</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Vehicle heating, the heat being derived otherwise than from the propulsion plant</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N241/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2241/16</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Spectrometer burners</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N241/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2241/18</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Incinerating apparatus</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N241/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2241/20</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Gas turbines</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N241/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>F23N2241/22</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Absorption refrigerator</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F23N900/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N2900/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Special features of, or arrangements for controlling combustion</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N900/01001" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N2900/01001</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Micro Electro Mechanical Systems [MEMS] for controlling fuel supply to burners</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F23N900/05101" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F23N2900/05101</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Connections between thermocouple and magnetic valves, e.g. by plug and socket connectors</text></title-part></class-title></classification-item>
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