H01TSPARK GAPSOVERVOLTAGE ARRESTERS USING SPARK GAPSSPARKING PLUGSCORONA DEVICESGENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES overvoltage protection circuits H02HIn this subclass, the term "spark gaps" is used with the following meaning: enclosed or non-enclosed discharge device having cold electrodes and used exclusively to discharge a quantity of electrical energy in a small time duration. H01T1/00 H01T1/00Details of spark gaps H01T1/02Means for extinguishing arc H01T1/04using magnetic blow-out H01T1/06with permanent magnet H01T1/08using flow of arc-extinguishing fluid H01T1/10with extinguishing fluid evolved from solid material by heat of arc H01T1/12Means structurally associated with spark gap for recording operation thereof H01T1/14Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure H01T1/15, H01T1/16, H01T1/18 take precedence; emergency protective circuit arrangements for spark gap arrestors H02H7/24 H01T1/15for protection against excessive pressure H01T1/16Series resistor structurally associated with spark gap H01T1/18Electrolytic device structurally associated with spark gap H01T1/20Means for starting arc or facilitating ignition of spark gap H01T1/22by the shape or the composition of the electrodes H01T1/24Selection of materials for electrodes H01T1/22 takes precedence H01T2/00Spark gaps comprising auxiliary triggering means triggering circuits H01T15/00 H01T2/02comprising a trigger electrode or an auxiliary spark gap H01T4/00Overvoltage arresters using spark gaps H01T2/00 takes precedence; overvoltage protection circuits using spark gaps H02H9/06 H01T4/02Details H01T4/04Housings H01T4/06 takes precedence H01T4/06Mounting arrangements for a plurality of overvoltage arresters H01T4/08structurally associated with protected apparatus with switches H01H9/14; with fuses H01H85/44 H01T4/10having a single gap or a plurality of gaps in parallel H01T4/12hermetically sealed H01T4/14Arcing horns associated with insulators H01B17/46 H01T4/16having a plurality of gaps arranged in series H01T4/18Arrangements for reducing height of stacked spark gaps H01T4/20Arrangements for improving potential distribution H01T7/00Rotary spark gaps, i.e. devices having one or more rotating electrodes H01T9/00Spark gaps specially adapted for generating oscillations H01T11/00Spark gaps specially adapted as rectifiers H01T13/00Sparking plugs H01T13/02Details H01T13/04Means providing electrical connection to sparking plugs H01T13/05combined with interference suppressing or shielding means H01T13/06Covers forming a part of the plug and protecting it against adverse environment H01T13/08Mounting, fixing or sealing of sparking plugs, e.g. in combustion chamber H01T13/10by bayonet-type connection H01T13/12Means on sparking plugs for facilitating engagement by tool or by hand H01T13/14Means for self-cleaning H01T13/16Means for dissipating heat H01T13/18Means for heating, e.g. for drying H01T13/20characterised by features of the electrodes or insulation H01T13/22having two or more electrodes embedded in insulation sparking plugs having two or more spark gaps H01T13/46 H01T13/24having movable electrodes H01T13/28 takes precedence H01T13/26for adjusting spark gap otherwise than by bending of electrode H01T13/28having spherically shaped electrodes, e.g. ball-shaped H01T13/30mounted so as to permit free movement H01T13/32characterised by features of the earthed electrode H01T13/34characterised by the mounting of electrodes in insulation, e.g. by embedding H01T13/36characterised by the joint between insulation and body, e.g. using cement H01T13/38Selection of materials for insulation H01T13/39Selection of materials for electrodes H01T13/40structurally combined with other devices combined or associated with fuel injectors F02M57/06; structurally combined with other parts of internal-combustion engines F02P13/00 H01T13/41with interference suppressing or shielding means H01T13/42with magnetic spark generators H01T13/44with transformers, e.g. for high-frequency ignition H01T13/46having two or more spark gaps H01T13/462in series connection H01T13/465one spark gap being incorporated in the sparking plug H01T13/467in parallel connection H01T13/48having means for rendering sparks visible H01T13/50having means for ionisation of gap H01T13/52 takes precedence H01T13/52characterised by a discharge along a surface H01T13/54having electrodes arranged in a partly-enclosed ignition chamber H01T13/56characterised by having component parts which are easily assembled or disassembled H01T13/58Testing testing characteristics of the spark in internal-combustion engine ignition F02P17/12 H01T13/60of electrical properties H01T14/00Spark gaps not provided for in groups H01T2/00 - H01T13/00 devices providing for corona discharge H01T19/00 H01T15/00Circuits specially adapted for spark gaps, e.g. ignition circuits ignition circuits for internal-combustion engines F02P; electric spark ignition for combustion apparatus F23Q; protection circuits using spark gaps H02H9/06 H01T19/00Devices providing for corona discharge for charging electrographic elements G03G15/02 H01T19/02Corona rings H01T19/04having pointed electrodes H01T21/00Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs H01T21/02of sparking plugs H01T21/04Cleaning means for self-cleaning H01T13/14; abrasive blasting devices for cleaning sparking-plugs B24C3/34 H01T21/06Adjustment of spark gaps sparking-plugs having movable electrodes for adjusting the gap H01T13/26 H01T23/00Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere