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81 lines
41 KiB
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81 lines
41 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
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<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="H01T" definition-exists="true" date-revised="2016-01-01" status="published"><classification-symbol>H01T</classification-symbol><class-title date-revised="2016-01-01"><title-part><text>SPARK GAPS</text></title-part><title-part><text>OVERVOLTAGE ARRESTERS USING SPARK GAPS</text></title-part><title-part><text>SPARKING PLUGS</text></title-part><title-part><text>CORONA DEVICES</text></title-part><title-part><text>GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES </text><reference><text>overvoltage protection circuits <class-ref scheme="cpc">H02H</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>In this subclass, the term "spark gaps" is used with the following meaning: <subnote type="bullet"><note-paragraph>enclosed or non-enclosed discharge device having cold electrodes and used exclusively to discharge a quantity of electrical energy in a small time duration.</note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="H01T1/00" date-revised="2013-01-01" status="published"><classification-symbol>H01T1/00</classification-symbol>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01T1/00" definition-exists="true" ipc-concordant="H01T1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T1/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of spark gaps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T1/02" definition-exists="false" ipc-concordant="H01T1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T1/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for extinguishing arc</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01T1/04" definition-exists="false" ipc-concordant="H01T1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T1/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using magnetic blow-out</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01T1/06" definition-exists="false" ipc-concordant="H01T1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T1/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with permanent magnet</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01T1/08" definition-exists="false" ipc-concordant="H01T1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T1/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using flow of arc-extinguishing fluid</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01T1/10" definition-exists="false" ipc-concordant="H01T1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T1/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with extinguishing fluid evolved from solid material by heat of arc</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T1/12" definition-exists="false" ipc-concordant="H01T1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T1/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means structurally associated with spark gap for recording operation thereof</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T1/14" definition-exists="true" ipc-concordant="H01T1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-02-01" status="published"><classification-symbol>H01T1/14</classification-symbol><class-title date-revised="2018-02-01"><title-part><text>Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure </text><reference><text><class-ref scheme="cpc">H01T1/15</class-ref>, <class-ref scheme="cpc">H01T1/16</class-ref>, <class-ref scheme="cpc">H01T1/18</class-ref> take precedence; emergency protective circuit arrangements for spark gap arrestors <class-ref scheme="cpc">H02H7/24</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T1/15" definition-exists="false" ipc-concordant="H01T1/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T1/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for protection against excessive pressure</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T1/16" definition-exists="false" ipc-concordant="H01T1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T1/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Series resistor structurally associated with spark gap</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T1/18" definition-exists="false" ipc-concordant="H01T1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T1/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrolytic device structurally associated with spark gap</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T1/20" definition-exists="false" ipc-concordant="H01T1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T1/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for starting arc or facilitating ignition of spark gap</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01T1/22" definition-exists="false" ipc-concordant="H01T1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T1/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the shape or the composition of the electrodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T1/24" definition-exists="true" ipc-concordant="H01T1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T1/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Selection of materials for electrodes </text><reference><text><class-ref scheme="cpc">H01T1/22</class-ref> takes precedence</text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01T2/00" definition-exists="true" ipc-concordant="H01T2/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T2/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spark gaps comprising auxiliary triggering means </text><reference><text>triggering circuits <class-ref scheme="cpc">H01T15/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T2/02" definition-exists="false" ipc-concordant="H01T2/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T2/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising a trigger electrode or an auxiliary spark gap</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01T4/00" definition-exists="true" ipc-concordant="H01T4/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T4/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Overvoltage arresters using spark gaps </text><reference><text><class-ref scheme="cpc">H01T2/00</class-ref> takes precedence; overvoltage protection circuits using spark gaps <class-ref scheme="cpc">H02H9/06</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T4/02" definition-exists="true" ipc-concordant="H01T4/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-01-01" status="published"><classification-symbol>H01T4/02</classification-symbol><class-title date-revised="2016-01-01"><title-part><text>Details</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T4/04" definition-exists="true" ipc-concordant="H01T4/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T4/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Housings </text><reference><text><class-ref scheme="cpc">H01T4/06</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T4/06" definition-exists="false" ipc-concordant="H01T4/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T4/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mounting arrangements for a plurality of overvoltage arresters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T4/08" definition-exists="true" ipc-concordant="H01T4/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T4/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>structurally associated with protected apparatus </text><reference><text>with switches <class-ref scheme="cpc">H01H9/14</class-ref>; with fuses <class-ref scheme="cpc">H01H85/44</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T4/10" definition-exists="false" ipc-concordant="H01T4/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T4/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a single gap or a plurality of gaps in parallel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01T4/12" definition-exists="false" ipc-concordant="H01T4/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T4/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>hermetically sealed</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="H01T4/14" definition-exists="true" ipc-concordant="H01T4/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T4/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arcing horns </text><reference><text>associated with insulators <class-ref scheme="cpc">H01B17/46</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T4/16" definition-exists="false" ipc-concordant="H01T4/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T4/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a plurality of gaps arranged in series</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01T4/18" definition-exists="false" ipc-concordant="H01T4/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-02-01" status="published"><classification-symbol>H01T4/18</classification-symbol><class-title date-revised="2018-02-01"><title-part><text>Arrangements for reducing height of stacked spark gaps</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="H01T4/20" definition-exists="false" ipc-concordant="H01T4/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T4/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for improving potential distribution</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01T7/00" definition-exists="true" ipc-concordant="H01T7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T7/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rotary spark gaps, i.e. devices having one or more rotating electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01T9/00" definition-exists="true" ipc-concordant="H01T9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T9/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spark gaps specially adapted for generating oscillations</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01T11/00" definition-exists="false" ipc-concordant="H01T11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T11/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spark gaps specially adapted as rectifiers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01T13/00" definition-exists="true" ipc-concordant="H01T13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sparking plugs</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T13/02" definition-exists="false" ipc-concordant="H01T13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01T13/04" definition-exists="true" ipc-concordant="H01T13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-01-01" status="published"><classification-symbol>H01T13/04</classification-symbol><class-title date-revised="2016-01-01"><title-part><text>Means providing electrical connection to sparking plugs</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01T13/05" definition-exists="false" ipc-concordant="H01T13/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>combined with interference suppressing or shielding means</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01T13/06" definition-exists="false" ipc-concordant="H01T13/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Covers forming a part of the plug and protecting it against adverse environment</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="H01T13/08" definition-exists="false" ipc-concordant="H01T13/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mounting, fixing or sealing of sparking plugs, e.g. in combustion chamber</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01T13/10" definition-exists="false" ipc-concordant="H01T13/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by bayonet-type connection</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01T13/12" definition-exists="false" ipc-concordant="H01T13/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means on sparking plugs for facilitating engagement by tool or by hand</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="H01T13/14" definition-exists="false" ipc-concordant="H01T13/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for self-cleaning</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="H01T13/16" definition-exists="false" ipc-concordant="H01T13/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for dissipating heat</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="H01T13/18" definition-exists="false" ipc-concordant="H01T13/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for heating, e.g. for drying</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T13/20" definition-exists="false" ipc-concordant="H01T13/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by features of the electrodes or insulation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01T13/22" definition-exists="true" ipc-concordant="H01T13/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-01-01" status="published"><classification-symbol>H01T13/22</classification-symbol><class-title date-revised="2016-01-01"><title-part><text>having two or more electrodes embedded in insulation </text><reference><text>sparking plugs having two or more spark gaps <class-ref scheme="cpc">H01T13/46</class-ref></text></reference></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="H01T13/24" definition-exists="true" ipc-concordant="H01T13/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having movable electrodes </text><reference><text><class-ref scheme="cpc">H01T13/28</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01T13/26" definition-exists="false" ipc-concordant="H01T13/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for adjusting spark gap otherwise than by bending of electrode</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01T13/28" definition-exists="false" ipc-concordant="H01T13/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having spherically shaped electrodes, e.g. ball-shaped</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01T13/30" definition-exists="false" ipc-concordant="H01T13/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>mounted so as to permit free movement</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01T13/32" definition-exists="false" ipc-concordant="H01T13/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by features of the earthed electrode</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="H01T13/34" definition-exists="false" ipc-concordant="H01T13/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the mounting of electrodes in insulation, e.g. by embedding</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="H01T13/36" definition-exists="false" ipc-concordant="H01T13/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the joint between insulation and body, e.g. using cement</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="H01T13/38" definition-exists="true" ipc-concordant="H01T13/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-01-01" status="published"><classification-symbol>H01T13/38</classification-symbol><class-title date-revised="2016-01-01"><title-part><text>Selection of materials for insulation</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="H01T13/39" definition-exists="false" ipc-concordant="H01T13/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/39</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Selection of materials for electrodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T13/40" definition-exists="true" ipc-concordant="H01T13/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>structurally combined with other devices </text><reference><text>combined or associated with fuel injectors <class-ref scheme="cpc">F02M57/06</class-ref>; structurally combined with other parts of internal-combustion engines <class-ref scheme="cpc">F02P13/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01T13/41" definition-exists="false" ipc-concordant="H01T13/41" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/41</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with interference suppressing or shielding means</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="H01T13/42" definition-exists="false" ipc-concordant="H01T13/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with magnetic spark generators</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="H01T13/44" definition-exists="false" ipc-concordant="H01T13/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with transformers, e.g. for high-frequency ignition</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T13/46" definition-exists="false" ipc-concordant="H01T13/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having two or more spark gaps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01T13/462" definition-exists="false" ipc-concordant="H01T13/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/462</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in series connection</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01T13/465" definition-exists="false" ipc-concordant="H01T13/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/465</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>one spark gap being incorporated in the sparking plug</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01T13/467" definition-exists="false" ipc-concordant="H01T13/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/467</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in parallel connection</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T13/48" definition-exists="false" ipc-concordant="H01T13/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having means for rendering sparks visible</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T13/50" definition-exists="true" ipc-concordant="H01T13/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having means for ionisation of gap </text><reference><text><class-ref scheme="cpc">H01T13/52</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T13/52" definition-exists="false" ipc-concordant="H01T13/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by a discharge along a surface</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T13/54" definition-exists="false" ipc-concordant="H01T13/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having electrodes arranged in a partly-enclosed ignition chamber</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T13/56" definition-exists="false" ipc-concordant="H01T13/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by having component parts which are easily assembled or disassembled</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T13/58" definition-exists="true" ipc-concordant="H01T13/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Testing </text><reference><text>testing characteristics of the spark in internal-combustion engine ignition <class-ref scheme="cpc">F02P17/12</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01T13/60" definition-exists="false" ipc-concordant="H01T13/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T13/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of electrical properties</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01T14/00" definition-exists="true" ipc-concordant="H01T14/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H01T14/00</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Spark gaps not provided for in groups <class-ref scheme="cpc">H01T2/00</class-ref> - <class-ref scheme="cpc">H01T13/00</class-ref> </text><reference><text>devices providing for corona discharge <class-ref scheme="cpc">H01T19/00</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01T15/00" definition-exists="true" ipc-concordant="H01T15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T15/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuits specially adapted for spark gaps, e.g. ignition circuits </text><reference><text>ignition circuits for internal-combustion engines <class-ref scheme="cpc">F02P</class-ref>; electric spark ignition for combustion apparatus <class-ref scheme="cpc">F23Q</class-ref>; protection circuits using spark gaps <class-ref scheme="cpc">H02H9/06</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01T19/00" definition-exists="true" ipc-concordant="H01T19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T19/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Devices providing for corona discharge </text><reference><text>for charging electrographic elements <class-ref scheme="cpc">G03G15/02</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T19/02" definition-exists="false" ipc-concordant="H01T19/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T19/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Corona rings</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T19/04" definition-exists="false" ipc-concordant="H01T19/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T19/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having pointed electrodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01T21/00" definition-exists="false" ipc-concordant="H01T21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T21/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T21/02" definition-exists="false" ipc-concordant="H01T21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T21/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of sparking plugs</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01T21/04" definition-exists="true" ipc-concordant="H01T21/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-02-01" status="published"><classification-symbol>H01T21/04</classification-symbol><class-title date-revised="2018-02-01"><title-part><text>Cleaning </text><reference><text>means for self-cleaning <class-ref scheme="cpc">H01T13/14</class-ref>; abrasive blasting devices for cleaning sparking-plugs <class-ref scheme="cpc">B24C3/34</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01T21/06" definition-exists="true" ipc-concordant="H01T21/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01T21/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Adjustment of spark gaps </text><reference><text>sparking-plugs having movable electrodes for adjusting the gap <class-ref scheme="cpc">H01T13/26</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01T23/00" definition-exists="true" ipc-concordant="H01T23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-01-01" status="published"><classification-symbol>H01T23/00</classification-symbol><class-title date-revised="2016-01-01"><title-part><text>Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere</text></title-part></class-title></classification-item></classification-item></classification-item></class-scheme> |