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; OTHER NON-ENCLOSED-DISCHARGE APPARATUS (working metal by arc discharge B23, particularly B23P 1/00; arc lamps H05B 31/00)
 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 1/16, H01T 1/18 take precedence)
 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 3/00
Spark gaps having a single gap or having a plurality of gaps in parallel, e.g. spark gap arrester (sparking plugs H01T 13/00)
 H01T 5/00
Spark gaps having a plurality of gaps arranged in series, e.g. spark gap arrester
 H01T 5/02
·  Arrangements for reducing height of stacked spark gaps
 H01T 5/04
·  Arrangements for improving potential distribution
 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
 H01T 13/02
·  Details
 H01T 13/04
·  ·  Means providing electrical connection to sparking plug (electric connections in general H01R)
 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 13/40
·  structurally combined with other devices, e.g. for preventing unauthorised use (combined or associated with fuel injectors F02M 57/06; structurally combined with other parts of internal-combustion engines F02P 13/00)
 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
·  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 15/00
Circuits specially adapted for spark gaps or other non-enclosed-discharge apparatus
 H01T 15/02
·  for sparking plugs
 H01T 17/00
Arcing horns
 H01T 19/00
Devices providing for corona discharge
 H01T 19/02
·  Corona rings
 H01T 19/04
·  having pointed electrodes, e.g. for treating plastics
 H01T 20/00
Non-enclosed-discharge apparatus not otherwise provided for  [2]
 H01T 20/02
·  Apparatus for generating ions to be introduced into non-enclosed gases, e.g. the atmosphere (ion guns H01J 3/04; generating plasma H05H)  [2]
 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 (by abrasive blasting B24C 3/34)