Cooperative Patent Classification


CPC Definition - Subclass H01T

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Last Updated Version: 2018.02
SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES (overvoltage protection circuits H02H)
Definition statement

This place covers:

  • Spark gaps, which 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.
References
Limiting references

This place does not cover:

Air purifiers

Surface shaping

Devices for generating ozone

Fuel Injection

Ignition circuits

Glow plugs

Pressure sensors

Charging electrographic elements

Voltage dependent resistors

Ignition coils

Fuses

Discharge tubes

Overvoltage protection circuits

Electrostatic discharge in general

Generating plasma

Informative references

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

Electrotherapy

Air purifiers

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

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

Surface shaping

Devices for generating ozone

Fuel Injection

Ignition circuits

Glow plugs

Pressure sensors

Charging electrographic elements

Voltage dependent resistors

Ignition coils

Fuses

Discharge tubes

Gas-filled discharge tubes with solid cathode

Electric arc lamps

Spark gaps for electrostatic discharge (ESD) components

Generating plasma

Glossary of terms

In this place, 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 place 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
Informative references

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

Thermally-actuated switches comprising a contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material

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; emergency protective circuit arrangements for spark gap arrestors H02H 7/24)
References
Limiting references

This place does not cover:

Protection against excessive pressure

Series resistor structurally associated with spark gap

Electrolytic device structurally associated with spark gap

Emergency protective circuit arrangements for spark gap arresters

Selection of materials for electrodes (H01T 1/22 takes precedence)
References
Limiting references

This place 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 place covers:

Triggering means, e.g. electrodes or additional discharge activation arrangements.

References
Limiting references

This place 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 place covers:

Spark gaps used as voltage limiting means.

References
Limiting references

This place 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
References
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
Limiting references

This place 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)
References
Limiting references

This place does not cover:

Switches

Structural association of fuses with spark gap arresters

Informative references

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

Means for providing an external arc discharge path over insulators

Arcing horns (associated with insulators H01B 17/46)
References
Limiting references

This place does not cover:

Arcing horns associated with insulators

Rotary spark gaps, i.e. devices having one or more rotating electrodes
References
Informative references

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

Ignition distributors

Spark gaps specially adapted for generating oscillations
References
Informative references

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

Surgical instruments for extracorporeal shock wave lithotripsy

Generating seismic energy using spark discharges

Sound-producing devices using electric discharge

Gas-filled discharge tubes with solid cathode

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

Jamming of communication

Sparking plugs
Definition statement

This place covers:

Sparking plugs for internal combustion engines.

References
Informative references

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

Structurally associated with fuel injector

Connected with ignition coil

Laser ignition devices

Glow plugs

Apparatus for recording rapid changes in pressure for detecting knocks in internal-combustion engines or combined pressure-sensitive members and ignitors for an internal combustion engine

Ignition coils

Means providing electrical connection to sparking plugs
References
Informative references

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

Sparking plugs structurally associated with fuel injectors

Electric connections in general

having two or more electrodes embedded in insulation (sparking plugs having two or more spark gaps H01T 13/46)
References
Limiting references

This place does not cover:

Electrodes embedded in insulation for sparking plugs having two or more spark gaps

having movable electrodes (H01T 13/28 takes precedence)
References
Limiting references

This place does not cover:

Spherically shaped electrodes, e.g. ball-shaped

Selection of materials for insulation
References
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
Limiting references

This place 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
Limiting references

This place 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
Limiting references

This place does not cover:

Testing characteristics of the spark in internal-combustion engine ignition

Spark gaps not provided for in groups H01T 2/00 - H01T 13/00 (devices providing for corona discharge H01T 19/00)
References
Limiting references

This place 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
Limiting references

This place 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
Limiting references

This place 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

Printing machines – Devices for treating the surface of sheets

Devices for generating ozone

Physical treatment of fibres, threads, or yarns

Carrying-off electrostatic charges

Cleaning (means for self-cleaning H01T 13/14; abrasive blasting devices for cleaning sparking-plugs B24C 3/34)
References
Limiting references

This place does not cover:

Means for self-cleaning

Abrasive blasting devices for cleaning sparking-plugs

Adjustment of spark gaps (sparking-plugs having movable electrodes for adjusting the gap H01T 13/26)
References
Limiting references

This place 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
References
Informative references

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

Electrotherapy applying ionised fluids

Air purifiers

Discharge tubes with provision for emergence of ions from the vessel

Generating plasma