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IPC 7
H01T-H01T02300

SECTION H – ELECTRICITY


H 01BASIC ELECTRIC ELEMENTS


H 01 TSPARK 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 

H01T 4/00 

Other spark gaps 

H01T 14/00 

Details 

H01T 1/00 

SPARKING PLUGS 

H01T 13/00 

CIRCUITS 

H01T 15/00 

DEVICES FOR CORONA DISCHARGE 

H01T 19/00 

MANUFACTURE, MAINTENANCE 

H01T 21/00 

APPARATUS FOR GENERATING IONS 

H01T 23/00 



1/

00Details of spark gaps

1/

02.Means for extinguishing arc

1/

04..using magnetic blow-out

1/

06...with permanent magnet

1/

08..using flow of arc-extinguishing fluid

1/

10...with extinguishing fluid evolved from solid material by heat of arc

1/

12.Means structurally associated with spark gap for recording operation thereof

1/

14.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]

1/

15.for protection against excessive pressure  [4]

1/

16.Series resistor structurally associated with spark gap

1/

18.Electrolytic device structurally associated with spark gap

1/

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

1/

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

1/

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


2/

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

2/

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


4/

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

4/

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

4/

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

4/

06.Mounting arrangements for a plurality of overvoltage arresters  [4]

4/

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

4/

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

4/

12..hermetically sealed  [4]

4/

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

4/

16.having a plurality of gaps arranged in series  [4]

4/

18..Arrangements for reducing height of stacked spark gaps  [4]

4/

20..Arrangements for improving potential distribution  [4]


7/

00Rotary spark gaps, i.e. devices having one or more rotating electrodes


9/

00Spark gaps specially adapted for generating oscillations


11/

00Spark gaps specially adapted as rectifiers


13/

00Sparking-plugs (testing sparking-plugs G01M 19/02)

13/

02.Details

13/

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

13/

05...combined with interference suppressing or shielding means  [4]

13/

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

13/

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

13/

10...by bayonet-type connection

13/

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

13/

14..Means for self-cleaning

13/

16..Means for dissipating heat

13/

18..Means for heating, e.g. for drying

13/

20.characterised by features of the electrodes or insulation

13/

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

13/

24..having movable electrodes (H01T 13/28 takes precedence)

13/

26...for adjusting spark gap otherwise than by bending of electrode

13/

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

13/

30...mounted so as to permit free movement

13/

32..characterised by features of the earthed electrode

13/

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

13/

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

13/

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

13/

39..Selection of materials for electrodes  [4]

13/

40.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/

41..with interference suppressing or shielding means  [4]

13/

42..with magnetic spark generators

13/

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

13/

46.having two or more spark gaps

13/

48.having means for rendering sparks visible

13/

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

13/

52.characterised by a discharge along a surface

13/

54.having electrodes arranged in a partly-enclosed ignition chamber

13/

56.characterised by having component parts which are easily assembled or disassembled


14/

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


15/

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 H02H 9/06) [4]


19/

00Devices providing for corona discharge (for charging electrographic elements G03G 15/02) [4]

19/

02.Corona rings

19/

04.having pointed electrodes


21/

00Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs

21/

02.of sparking plugs

21/

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

21/

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


23/

00Apparatus 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]

  
 

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