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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)
Definition statement
This subclass covers:
  • Spark gaps, which is used with the following meaning: enclosed or nonenclosed;
  • Discharge device having cold electrodes and used exclusively to, discharge a quantity of electrical energy in a small time duration.
Relationship between large subject matter areas

Ignition: F02P

Voltage dependent resistors: H01C

References relevant to classification in this subclass
This subclass does not cover:

Electrotherapy

Air purifiers

Surface shaping

Air purifiers

Devices for generating ozone

Fuses

Overvoltage protection circuits

Voltage dependent resistors

Ignition circuits

Glow plugs

Fuel Injection

Charging electrographic elements

Pressure sensors

Ignition coils

Electrostatic discharge in general

Discharge tubes

Generating plasma

Examples of places where the subject matter of this subclass is covered when

specially adapted, used for a particular purpose, or incorporated in a larger

system:

Spark gaps for ElectroStatic Discharge (ESD) components

Overvoltage protection circuits using a spark gap

Informative references
Attention is drawn to the following places, which may be of interest for search:

Working of metal by the action of a high concentration of electric current

Welding, e.g. arc welding, electron beam welding or electrolytic welding

Gas-filled discharge tubes with solid cathode

Electric arc lamps

Glossary of terms
In this subclass, the following terms (or expressions) are used with the meaning indicated:

In this subclass, the following terms (or expressions) are used with the

meaning indicated:

Spark gap

Enclosed or non-enclosed discharge device having cold electrodes and used exclusively to discharge a quantity of electrical energy in a small time duration

Details of spark gaps
Definition statement
This group covers:

Constructional details of the spark gap or of means structurally associated therewith.

The intended use of the spark gap (e.g. overvoltage arrester) is not considered.

References relevant to classification in this group
This group does not cover:

Fuses as means associated with spark gap for disconnecting it in case of failure

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)
References relevant to classification in this group
This subgroup does not cover:

Protection against excessive pressure

Series resistor structurally associated with spark gap

Electrolytic device structurally associated with spark gap

Selection of materials for electrodes (H01T 1/22 takes precedence)
References relevant to classification in this group
This subgroup does not cover:

Means for starting arc or facilitating ignition of spark gap by the shape or the composition of the electrodes

Spark gaps comprising auxiliary triggering means (triggering circuits H01T 15/00)
Definition statement
This group covers:

Devices comprising additional electrodes for discharge activation

References relevant to classification in this group
This group does not cover:

Triggering circuits

Overvoltage arresters using spark gaps (H01T 2/00 takes precedence; overvoltage protection circuits using spark gaps H02H 9/06)
Definition statement
This group covers:

Spark gaps used as voltage limiting means.

References relevant to classification in this group
This group does not cover:

Overvoltage arresters comprising auxiliary triggering means

Overvoltage protection circuits using spark gaps

Informative references
Attention is drawn to the following places, which may be of interest for search:

Voltage dependent resistors used as overvoltage arresters

Details (of spark gaps H01T 1/00)
Informative references
Attention is drawn to the following places, which may be of interest for search:

Details of spark gaps

Housings (H01T 4/06 takes precedence)
References relevant to classification in this group
This subgroup does not cover:

Mounting arrangements for a plurality of overvoltage arresters

structurally associated with protected apparatus (with switches H01H 9/14; with fuses H01H 85/44)
Informative references
Attention is drawn to the following places, which may be of interest for search:

Switches

Fuses

Arcing horns (associated with insulators H01B 17/46)
References relevant to classification in this group
This subgroup does not cover:

Arcing horns associated with insulators

Rotary spark gaps, i.e. devices having one or more rotating electrodes
References relevant to classification in this group
This group does not cover:

Ignition distributors

Spark gaps specially adapted for generating oscillations
Informative references
Attention is drawn to the following places, which may be of interest for search:

Gas-filled discharge tubes with solid cathode

Generation of oscillations using a shock-excited tuned circuit excited by spark

Sparking plugs
Definition statement
This group covers:

Sparking plugs for internal combustion engines.

References relevant to classification in this group
This group does not cover:

Structurally associated with fuel injector

Connected with ignition coil

Laser ignition devices

Informative references
Attention is drawn to the following places, which may be of interest for search:

Glow plugs

Pressure sensors for internal combustion engines

Ignition coils

having two or more electrodes embedded in insulation (for two or more sparks H01T 13/46)
References relevant to classification in this group
This subgroup does not cover:

Electrodes embedded in insulation for two or more sparks

having movable electrodes (H01T 13/28 takes precedence)
References relevant to classification in this group
This subgroup does not cover:

Spherically shaped electrodes, e.g. ball-shaped

Selection of materials for insulation (in general H01B 3/00)
Informative references
Attention is drawn to the following places, which may be of interest for search:

Insulating materials in general

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)
References relevant to classification in this group
This subgroup does not cover:

Sparking plugs combined or associated with fuel injectors

Sparking plugs structurally combined with other parts of internal-combustion engines

having means for ionisation of gap (H01T 13/52 takes precedence)
References relevant to classification in this group
This subgroup does not cover:

Characterised by a discharge along a surface

Testing (testing characteristics of the spark in internal-combustion engine ignition F02P 17/12)
References relevant to classification in this group
This subgroup does not cover:

Testing characteristics of the spark in internal-combustion engine ignition

Spark gaps not provided for in groups H01T 2/00 to H01T 13/00(devices providing for corona discharge H01T 19/00)
References relevant to classification in this group
This group does not cover:

Devices providing for corona discharge

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)
References relevant to classification in this group
This group does not cover:

Ignition circuits for internalcombustion engines

Electric spark ignition for combustion apparatus

Protection circuits using spark gaps

Devices providing for corona discharge (for charging electrographic elements G03G 15/02)
References relevant to classification in this group
This group does not cover:

Devices for charging electrographic elements

Informative references
Attention is drawn to the following places, which may be of interest for search:

Surface shaping by electric discharge

Devices for generating ozone

Carrying-off electrostatic charges

Cleaning (abrasive blasting devices for cleaning sparking-plugs B24C 3/34)
References relevant to classification in this group
This subgroup does not cover:

Abrasive blasting devices for cleaning sparking-plugs

Adjustment of spark gaps (sparking-plugs having movable electrodes for adjusting the gap H01T 13/26)
References relevant to classification in this group
This subgroup does not cover:

Sparking-plugs having movable electrodes for adjusting the gap

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)
References relevant to classification in this group
This group does not cover:

Discharge tubes with provision for emergence of ions form the vessel

Generating plasma

Informative references
Attention is drawn to the following places, which may be of interest for search:

Electrotherapy applying ionised fluids

Air purifiers

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Last Modified: 10/11/2013