IPC 7 English version H01T !A-H01T 23/00

H01T-H01T02300

SECTION H – ELECTRICITY

H 01

BASIC ELECTRIC ELEMENTS

H 01 T

SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES (working of metal by the action of a high concentration of electric current B23H; welding, e.g. arc welding, electron beam welding or electrolytic welding, B23K; gas-filled discharge tubes with solid cathode H01J 17/00; electric arc lamps H05B 31/00)

Note

In this subclass, the following expression is used with the meaning indicated:

–

"spark gaps" means enclosed or non-enclosed discharge device having cold electrodes and used exclusively to discharge a quantity of electrical energy in a small time duration. [4]

Subclass Index

SPARK GAPS

Rotary

H01T 7/00

Comprising auxiliary triggering means

H01T 2/00

Special adaptations: for oscillations; for rectifiers

H01T 9/00; H01T 11/00

Overvoltage arresters; arcing horns

Other spark gaps

Details

SPARKING PLUGS

CIRCUITS

DEVICES FOR CORONA DISCHARGE

H01T 19/00

MANUFACTURE, MAINTENANCE

H01T 21/00

APPARATUS FOR GENERATING IONS

H01T 23/00

Details of spark gaps

Means for extinguishing arc

using magnetic blow-out

with permanent magnet

using flow of arc-extinguishing fluid

with extinguishing fluid evolved from solid material by heat of arc

Means structurally associated with spark gap for recording operation thereof

Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure (H01T 1/15, H01T 1/16, H01T 1/18 take precedence) [4]

for protection against excessive pressure [4]

Series resistor structurally associated with spark gap

Electrolytic device structurally associated with spark gap

Means for starting arc or facilitating ignition of spark gap [3]

by the shape or the composition of the electrodes [4]

Selection of materials for electrodes (H01T 1/22 takes precedence) [4]

Spark gaps comprising auxiliary triggering means (triggering circuits H01T 15/00) [4]

comprising a trigger electrode or an auxiliary spark gap [4]

Overvoltage arresters using spark gaps (H01T 2/00 takes precedence; overvoltage protection circuits using spark gaps H02H 9/06) [4]

Details (of spark gaps H01T 1/00) [4]

Housings (H01T 4/06 takes precedence) [4]

Mounting arrangements for a plurality of overvoltage arresters [4]

structurally associated with protected apparatus (with switches H01H 9/14; with fuses H01H 85/44) [4]

having a single gap or a plurality of gaps in parallel (sparking-plugs H01T 13/00) [4]

hermetically sealed [4]

Arcing horns (associated with insulators H01B 17/46) [4]

having a plurality of gaps arranged in series [4]

Arrangements for reducing height of stacked spark gaps [4]

Arrangements for improving potential distribution [4]

Rotary spark gaps, i.e. devices having one or more rotating electrodes

Spark gaps specially adapted for generating oscillations

11/

Spark gaps specially adapted as rectifiers

13/

Sparking-plugs (testing sparking-plugs G01M 19/02)

13/

Details

13/

Means providing electrical connection to sparking plug (electric connections in general H01R)

13/

combined with interference suppressing or shielding means [4]

13/

Covers forming a part of the plug and protecting it against adverse environment

13/

Mounting, fixing, or sealing of sparking plugs, e.g. in combustion chamber

13/

by bayonet-type connection

13/

Means on sparking plugs for facilitating engagement by tool or by hand

13/

Means for self-cleaning

13/

Means for dissipating heat

13/

Means for heating, e.g. for drying

13/

characterised by features of the electrodes or insulation

13/

having two or more electrodes embedded in insulation (for two or more sparks H01T 13/46)

13/

having movable electrodes (H01T 13/28 takes precedence)

13/

for adjusting spark gap otherwise than by bending of electrode

13/

having spherically shaped electrodes, e.g. ball-shaped

13/

mounted so as to permit free movement

13/

characterised by features of the earthed electrode

13/

characterised by the mounting of electrodes in insulation, e.g. by embedding

13/

characterised by the joint between insulation and body, e.g. using cement

13/

Selection of materials for insulation (in general H01B 3/00)

13/

Selection of materials for electrodes [4]

13/

structurally combined with other devices (combined or associated with fuel injectors F02M 57/06; structurally combined with other parts of internal-combustion engines F02P 13/00)

13/

with interference suppressing or shielding means [4]

13/

with magnetic spark generators

13/

with transformers, e.g. for high-frequency ignition

13/

having two or more spark gaps

13/

having means for rendering sparks visible

13/

having means for ionisation of gap (H01T 13/52 takes precedence) [4]

13/

characterised by a discharge along a surface

13/

having electrodes arranged in a partly-enclosed ignition chamber

13/

characterised by having component parts which are easily assembled or disassembled

14/

Spark gaps not provided for in groups H01T 2/00 to H01T 13/00 (devices providing for corona discharge H01T 19/00) [4]

15/

Circuits 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 H02H 9/06) [4]

19/

Devices providing for corona discharge (for charging electrographic elements G03G 15/02) [4]

19/

Corona rings

19/

having pointed electrodes

21/

Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs

21/

of sparking plugs

21/

Cleaning (abrasive blasting devices for cleaning sparking-plugs B24C 3/34)

21/

Adjustment of spark gaps (sparking-plugs having movable electrodes for adjusting the gap H01T 13/26) [4]

23/

Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere (discharge tubes with provision for emergence of ions from the vessel H01J 33/00; generating plasma H05H) [4]