CPC Definition - Subclass H01T

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

B03C

Surface shaping

B29C

Devices for generating ozone

C01B

Fuel Injection

F02M

Ignition circuits

F02P

Glow plugs

F23Q

Pressure sensors

G01L

Charging electrographic elements

G03G

Voltage dependent resistors

H01C

Ignition coils

H01F

Fuses

H01H

Discharge tubes

H01J

Overvoltage protection circuits

H02H

Electrostatic discharge in general

H05F

Generating plasma

H05H

Informative references

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

Electrotherapy

A61N

Air purifiers

B03C

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

Surface shaping

B29C

Devices for generating ozone

C01B

Fuel Injection

F02M

Ignition circuits

F02P

Glow plugs

F23Q

Pressure sensors

G01L

Charging electrographic elements

G03G

Voltage dependent resistors

H01C

Ignition coils

H01F

Fuses

H01H 85/00

Discharge tubes

H01J

Gas-filled discharge tubes with solid cathode

H01J 17/00

Electric arc lamps

H05B 31/00

Spark gaps for electrostatic discharge (ESD) components

H05F 3/04

Generating plasma

H05H 1/24

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

H01H 37/76

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

H01T 1/15

Series resistor structurally associated with spark gap

H01T 1/16

Electrolytic device structurally associated with spark gap

H01T 1/18

Emergency protective circuit arrangements for spark gap arresters

H02H 7/24

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

H01T 1/22

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

H01T 15/00

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

H01T 2/00

Overvoltage protection circuits using spark gaps

H02H 9/06

Informative references

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

Voltage dependent resistors used as overvoltage arresters

H01C 7/12

Details
References
Informative references

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

Details of spark gaps

H01T 1/00

Housings (H01T 4/06 takes precedence)
References
Limiting references

This place does not cover:

Mounting arrangements for a plurality of overvoltage arresters

H01T 4/06

structurally associated with protected apparatus (with switches H01H 9/14; with fuses H01H 85/44)
References
Limiting references

This place does not cover:

Switches

H01H 9/14

Structural association of fuses with spark gap arresters

H01H 85/44

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

H01B 17/46

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

This place does not cover:

Arcing horns associated with insulators

H01B 17/46

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

F02P 7/02

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

A61B 17/225

Generating seismic energy using spark discharges

G01V 1/157

Sound-producing devices using electric discharge

G10K 15/06

Gas-filled discharge tubes with solid cathode

H01J 17/00

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

H03B 11/02

Jamming of communication

H04K 3/00

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

F02M 57/06

Connected with ignition coil

F02P 3/02

Laser ignition devices

F02P 23/04

Glow plugs

F23Q 7/00

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

G01L 23/22

Ignition coils

H01F 38/12

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

F02M 57/06

Electric connections in general

H01R

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

H01T 13/46

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

This place does not cover:

Spherically shaped electrodes, e.g. ball-shaped

H01T 13/28

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

H01B 3/00

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

F02M 57/06

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

F02P 13/00

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

H01T 13/52

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

F02P 17/12

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

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)
References
Limiting references

This place does not cover:

Ignition circuits for internalcombustion engines

F02P

Electric spark ignition for combustion apparatus

F23Q

Protection circuits using spark gaps

H02H 9/06

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

G03G 15/02

Informative references

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

Surface shaping by electric discharge

B29C 59/10

Printing machines – Devices for treating the surface of sheets

B41F 23/00

Devices for generating ozone

C01B 13/11

Physical treatment of fibres, threads, or yarns

D06M 10/02

Carrying-off electrostatic charges

H05F 3/04

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

H01T 13/14

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)
References
Limiting references

This place does not cover:

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
References
Informative references

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

Electrotherapy applying ionised fluids

A61N 1/44

Air purifiers

B03C 3/68

Discharge tubes with provision for emergence of ions from the vessel

H01J 33/00

Generating plasma

H05H 1/24