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Indent Level
Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
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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 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.

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Details of spark gaps
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H01T 1/02
.
Means for extinguishing arc
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H01T 1/04
. .
using magnetic blow-out
H01T 1/06
. . .
with permanent magnet
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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
.
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
H01T 1/16
.
Series resistor structurally associated with spark gap
H01T 1/18
.
Electrolytic device structurally associated with spark gap
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H01T 1/20
.
Means for starting arc or facilitating ignition of spark gap
H01T 1/22
. .
by the shape or the composition of the electrodes
.
Selection of materials for electrodes (H01T 1/22 takes precedence)
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Spark gaps comprising auxiliary triggering means (triggering circuits H01T 15/00)
H01T 2/02
.
comprising a trigger electrode or an auxiliary spark gap
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Overvoltage arresters using spark gaps (H01T 2/00 takes precedence; overvoltage protection circuits using spark gaps H02H 9/06)
.
Details (of spark gaps H01T 1/00)
.
Housings (H01T 4/06 takes precedence)
H01T 4/06
.
Mounting arrangements for a plurality of overvoltage arresters
.
structurally associated with protected apparatus (with switches H01H 9/14; with fuses H01H 85/44)
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H01T 4/10
.
having a single gap or a plurality of gaps in parallel
H01T 4/12
. .
hermetically sealed
. .
Arcing horns (associated with insulators H01B 17/46)
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H01T 4/16
.
having a plurality of gaps arranged in series
H01T 4/18
. .
Arrangements for reducing height of stocked spark gaps
H01T 4/20
. .
Arrangements for improving potential distribution
Rotary spark gaps, i.e. devices having one or more rotating electrodes
Spark gaps specially adapted for generating oscillations
H01T 11/00
Spark gaps specially adapted as rectifiers
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Sparking plugs
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H01T 13/02
.
Details
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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
H01T 13/06
. .
Covers forming a part of the plug and protecting it against adverse environment
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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
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H01T 13/20
.
characterised by features of the electrodes or insulation
. .
having two or more electrodes embedded in insulation (for two or more sparks H01T 13/46)
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. .
having movable electrodes (H01T 13/28 takes precedence)
H01T 13/26
. . .
for adjusting spark gap otherwise than by bending of electrode
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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
. .
Selection of materials for insulation (in general H01B 3/00)
H01T 13/39
. .
Selection of materials for electrodes
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.
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
H01T 13/42
. .
with magnetic spark generators
H01T 13/44
. .
with transformers, e.g. for high-frequency ignition
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H01T 13/46
.
having two or more spark gaps
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H01T 13/462
. .
{
in series connection
}
H01T 13/465
. . .
{
one spark gap being incorporated in the sparking plug
}
H01T 13/467
. .
{
in parallel connection
}
H01T 13/48
.
having means for rendering sparks visible
.
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
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.
Testing (testing characteristics of the spark in internal-combustion engine ignition F02P 17/12)
H01T 13/60
. .
of electrical properties
Spark gaps not provided for in groups H01T 2/00 to H01T 13/00(devices providing for corona discharge H01T 19/00)
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)
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Devices providing for corona discharge (for charging electrographic elements G03G 15/02)
H01T 19/02
.
Corona rings
H01T 19/04
.
having pointed electrodes
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H01T 21/00
Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs
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H01T 21/02
.
of sparking plugs
. .
Cleaning (abrasive blasting devices for cleaning sparking-plugs B24C 3/34)
.
Adjustment of spark gaps (sparking-plugs having movable electrodes for adjusting the gap H01T 13/26)
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)
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Last Modified: 10/10/2013