H
SECTION H — ELECTRICITY
 H01
BASIC ELECTRIC ELEMENTS
 H01

Note(s)

Processes involving only a single technical art, e.g. drying, coating, for which provision exists elsewhere are classified in the relevant class for that art.

 H01T
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)
 H01T

Note(s)

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.

 H01T 1/00
Details of spark gaps
 H01T 1/02
·  Means for extinguishing arc
 H01T 1/04
·  ·  using magnetic blow-out
 H01T 1/06
·  ·  ·  with permanent magnet
 H01T 1/08
·  ·  using flow of arc-extinguishing fluid
 H01T 1/10
·  ·  ·  with extinguishing fluid evolved from solid material by heat of arc
 H01T 1/12
·  Means structurally associated with spark gap for recording operation thereof
 H01T 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)
 H01T 1/15
·  for protection against excessive pressure  [4]
 H01T 1/16
·  Series resistor structurally associated with spark gap
 H01T 1/18
·  Electrolytic device structurally associated with spark gap
 H01T 1/20
·  Means for starting arc or facilitating ignition of spark gap  [3]
 H01T 1/22
·  ·  by the shape or the composition of the electrodes  [4]
 H01T 1/24
·  Selection of materials for electrodes (H01T 1/22 takes precedence)  [4]
 H01T 2/00
Spark gaps comprising auxiliary triggering means (triggering circuits H01T 15/00)  [4]
 H01T 2/02
·  comprising a trigger electrode or an auxiliary spark gap  [4]
 H01T 3/00
( transferred to H01T 4/10, H01T 14/00 )
 H01T 4/00
Overvoltage arresters using spark gaps (H01T 2/00 takes precedence; overvoltage protection circuits using spark gaps H02H 9/06)  [4]
 H01T 4/02
·  Details (of spark gaps H01T 1/00)  [4]
 H01T 4/04
·  Housings (H01T 4/06 takes precedence)  [4]
 H01T 4/06
·  Mounting arrangements for a plurality of overvoltage arresters  [4]
 H01T 4/08
·  structurally associated with protected apparatus (with switches H01H 9/14; with fuses H01H 85/44)  [4]
 H01T 4/10
·  having a single gap or a plurality of gaps in parallel (sparking-plugs H01T 13/00)  [4]
 H01T 4/12
·  ·  hermetically sealed  [4]
 H01T 4/14
·  ·  Arcing horns (associated with insulators H01B 17/46)  [4]
 H01T 4/16
·  having a plurality of gaps arranged in series  [4]
 H01T 4/18
·  ·  Arrangements for reducing height of stacked spark gaps  [4]
 H01T 4/20
·  ·  Arrangements for improving potential distribution  [4]
 H01T 5/00
( transferred to H01T 4/16, H01T 14/00 )
 H01T 5/02
( transferred to H01T 4/18, H01T 14/00 )
 H01T 5/04
( transferred to H01T 4/20, H01T 14/00 )
 H01T 7/00
Rotary spark gaps, i.e. devices having one or more rotating electrodes
 H01T 9/00
Spark gaps specially adapted for generating oscillations
 H01T 11/00
Spark gaps specially adapted as rectifiers
 H01T 13/00
Sparking-plugs (testing sparking-plugs G01M 19/02)
 H01T 13/02
·  Details
 H01T 13/04
·  ·  Means providing electrical connection to sparking plug (electric connections in general H01R)
 H01T 13/05
·  ·  ·  combined with interference suppressing or shielding means  [4]
 H01T 13/06
·  ·  Covers forming a part of the plug and protecting it against adverse environment
 H01T 13/08
·  ·  Mounting, fixing, or sealing of sparking plugs, e.g. in combustion chamber
 H01T 13/10
·  ·  ·  by bayonet-type connection
 H01T 13/12
·  ·  Means on sparking plugs for facilitating engagement by tool or by hand
 H01T 13/14
·  ·  Means for self-cleaning
 H01T 13/16
·  ·  Means for dissipating heat
 H01T 13/18
·  ·  Means for heating, e.g. for drying
 H01T 13/20
·  characterised by features of the electrodes or insulation
 H01T 13/22
·  ·  having two or more electrodes embedded in insulation (for two or more sparks H01T 13/46)
 H01T 13/24
·  ·  having movable electrodes (H01T 13/28 takes precedence)
 H01T 13/26
·  ·  ·  for adjusting spark gap otherwise than by bending of electrode
 H01T 13/28
·  ·  having spherically shaped electrodes, e.g. ball-shaped
 H01T 13/30
·  ·  ·  mounted so as to permit free movement
 H01T 13/32
·  ·  characterised by features of the earthed electrode
 H01T 13/34
·  ·  characterised by the mounting of electrodes in insulation, e.g. by embedding
 H01T 13/36
·  ·  characterised by the joint between insulation and body, e.g. using cement
 H01T 13/38
·  ·  Selection of materials for insulation (in general H01B 3/00)
 H01T 13/39
·  ·  Selection of materials for electrodes  [4]
 H01T 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)
 H01T 13/41
·  ·  with interference suppressing or shielding means  [4]
 H01T 13/42
·  ·  with magnetic spark generators
 H01T 13/44
·  ·  with transformers, e.g. for high-frequency ignition
 H01T 13/46
·  having two or more spark gaps
 H01T 13/48
·  having means for rendering sparks visible
 H01T 13/50
·  having means for ionisation of gap (H01T 13/52 takes precedence)
 H01T 13/52
·  characterised by a discharge along a surface
 H01T 13/54
·  having electrodes arranged in a partly-enclosed ignition chamber
 H01T 13/56
·  characterised by having component parts which are easily assembled or disassembled
 H01T 14/00
Spark gaps not provided for in groups H01T 2/00-H01T 13/00 (devices providing for corona discharge H01T 19/00)  [4]
 H01T 15/00
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)
 H01T 15/02
( covered by F02C 7/26, F02P, F23Q )
 H01T 17/00
( transferred to H01T 4/14 )
 H01T 19/00
Devices providing for corona discharge (for charging electrographic elements G03G 15/02)
 H01T 19/02
·  Corona rings
 H01T 19/04
·  having pointed electrodes
 H01T 20/00
( transferred to H01T 14/00, H01T 23/00 )
 H01T 20/02
( transferred to H01T 23/00 )
 H01T 21/00
Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs
 H01T 21/02
·  of sparking plugs
 H01T 21/04
·  ·  Cleaning (abrasive blasting devices for cleaning sparking-plugs B24C 3/34)
 H01T 21/06
·  Adjustment of spark gaps (sparking-plugs having movable electrodes for adjusting the gap H01T 13/26)  [4]
 H01T 23/00
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]