CPC Definition - Subclass F23Q

Last Updated Version: 2018.01
IGNITION (devices or installations peculiar to internal-combustion engines F02P; of cigarettes or tobacco A24F; compositions therefor, chemical igniters C06C); EXTINGUISHING-DEVICES
Definition statement

This place covers:

Apparatus or methods specially adapted for providing the heat, spark or flame required to start combustion of a fuel. Such apparatus can itself be a combustion apparatus (e.g. a cigarette lighter or a pilot flame) that is provided with ignition arrangements of its own.

Mechanical igniters.

Lighter containing fuel e.g. for cigarettes.

Igniters using electrically-produced sparks.

Make-and break ignition.

Incandescent ignition.

Pilot flame igniters.

Arrangement of catalytic igniters.

Devices for effecting ignition from a remote location that is remote from the combustion apparatus to be ignited, e.g. for combustion apparatus that is difficult or dangerous to access.

Testing of ignition installations.

Extinguishing-devices, e.g. for blowing-out or snuffing candle flames.

Relationships with other classification places

This subclass is primarily intended for classification of ignition devices or extinguishing devices per se.

In relation to other subclasses that cover combustion apparatus (e.g. F23B;F23C;F23D;F23G;F23R;F24B and F24C) this subclass is a detail place. This means that classification is made in this subclass if an ignition or extinguishing device is novel or non-obvious in itself. The incorporation or arrangement of an ignition or extinguishing device in a combustion apparatus is normally classified in the place for the combustion apparatus as a whole, e.g. in F23C or F24C. In such cases the type of ignition apparatus can be indicated by additional information classification in this subclass, if it is of interest for searching. The exception to this principle is the arrangement of catalytic igniters in combustion apparatus, which is classified in group F23Q 11/00 of this subclass.

Main group F23Q 2/00 of this subclass covers "lighters containing fuel". These lighters can themselves in most cases be regarded as combustion apparatus. Features of such lighters that are of general interest for different types of combustion apparatus should be classified in relevant general places, such as F23D.

This subclass covers devices or systems where ignition is directly initiated by the start of fuel supply to a combustion apparatus. Systems or methods for starting or stopping combustion that involve manipulation of fuel and air feed in connection with the operation of an ignition or extinguishing device, or that are responsive to a sensed condition of a combustion apparatus, are normally classified in F23N. The exception to this principle is pilot flame igniters with interlock to main fuel supply, which are classified in group F23Q 9/08 of this subclass.

This subclass covers glowing plugs for compression-ignition (e.g. diesel) engines. Other ignition for internal combustion engines is covered by subclass F02P.

References
Limiting references

This place does not cover:

Match receptacles or boxes

A24F 27/00

Devices for igniting matches

A24F 29/00

Hand fire extinguishers

A62C 11/00, A62C 25/00

Chemical contact igniters, e.g. catalytic igniters

C06C 9/00

Flints (composition, manufacture)

C06C 15/00

Matches

C06F 5/00

Fire-lighters

C10L 11/00

Candles with incorporated means (e.g. impregnated wicks) for self-extinguishing

C11C 5/00

Ignition arrangements for blasting

F42D 1/04

Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Cigars or cigarettes with lighting devices

A24D 1/08

Combinations of lighters and smokers requisites

A24F 15/10, A24F 15/18, A24F 19/10

Time-controlled igniting mechanisms for cooking-vessels

A47J 36/32

Charcoal igniting devices for barbecues or the like

A47J 37/07

Arrangements for igniting thermal or catalytic exhaust converters

F01N 3/38

Ignition of light sources using charges of combustible material

F21K5/12

Igniting devices; fire-igniting fans used in connections with stoves or ranges for solid fuels

F24B 15/005

Arrangement or mounting of ignition devices in stoves or ranges for gaseous fuel

F24C 3/10

Arrangement or mounting of ignition devices in stoves or ranges for liquid fuel

F24C 5/14

Informative references

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

Smokers' requisites; match boxes

A24F

Fire-fighting

A62C

Explosive or thermic compositions

C06B

Detonating or priming devices; Fuses

C06C

Ignition for internal-combustion engines

F02P

Details for lighting devices

F21V

Methods or apparatus for combustion using only solid fuel

F23B

Methods or apparatus for combustion using fluent fuel

F23C

Burners

F23D

Gas burners with provision for a retention flame

F23D 14/26

Cremation furnaces; Consuming waste by combustion

F23G

Safety arrangements for combustion chambers

F23M 11/00

Regulating or controlling combustion

F23N

Generating combustion products of high pressure or high velocity, e.g. gas turbine combustion chambers

F23R

Domestic stoves or ranges for solid fuels; Implements for use in connection with stoves or ranges

F24B

Stoves or ranges for gaseous or liquid fuels

F24C

Spark gaps; Sparking plugs

H01T

Electric heating, e.g. ohmic resistance heating

H05B, H05B 3/00

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Retention flame

A small flame that is kept alight in order to maintain the uninterrupted operation of a more powerful burner.

Pilot flame

A small flame that is lit or kept alight in order to provide ignition to a more powerful burner.

Fire lighter

An element that either consists of combustible material or absorbs liquid fuel, and is intended for use in a fire-place or the like for simplifying the ignition of solid fuel.

Mechanical igniters (lighters containing fuel F23Q 2/00; matches C06F)
References
Limiting references

This place does not cover:

Lighters containing fuel

F23Q 2/00

Matches; manufacture of matches

C06F

Lighters containing fuel, e.g. for cigarettes
References
Limiting references

This place does not cover:

Lighters with incandescent ignition but without fuel

F23Q 7/00, F23Q 7/14

Lighters using solar energy

F23Q 13/005

Valves therefor (valves in general F16K)
References
Informative references

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

Valves in general

F16K

Lighters characterised by electrical ignition of the fuel (lighter with electrically-produced sparks but without fuel F23Q 3/00)
References
Informative references

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

Lighters using electrically-produced sparks without fuel

F23Q 3/00

Portable igniters with incandescent ignition without fuel

F23Q 7/14

Igniters using electrically-produced sparks (sparking-plugs H01T 13/00)
References
Informative references

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

Piezo-electric or electrostrictive devices

H01L 41/08

Sparking plugs

H01T 13/00

Circuits for generating electric pulses

H03K 3/00

Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes (circuits therefor H01T 15/00); Electrically-heated glowing plugs
Definition statement

This place covers:

Ignition by a hot glowing surface; Electrically heated igniters, e.g. glow plugs used for internal combustion engines; Igniters comprising a hot glowing surface or igniting solid fuel or fluid-fuel burners; Portable igniters comprising electric means to heat a hot glowing surface, e.g. cigarette igniters.

.

References
Informative references

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

Electrically heated lighters in vehicle passenger accommodation

B60N 3/14

Heating of combustion-air in combustion engines by flame generating means, e.g. flame glow-plugs

F02N 19/06

Layout of circuits of apparatus having glowing plugs

F02P 19/02

Devices or apparatus for detecting or indicating knocks in internal- combustions engines

G01L 23/22

Circuits specially adapted for spark gaps, e.g. ignition circuits

H01T 15/00

Pilot flame igniters
References
Informative references

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

Pilot flames, i.e. fuel nozzles or injectors using only a very small proportion of the total fuel to insure continuous combustion

F23R 3/343

with interlock with main fuel supply
References
Informative references

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

Protection against flame failure by using flame detection devices

F23D 14/725

Testing of ignition installations (peculiar to internal-combustion engines F02P 17/00)
References
Limiting references

This place does not cover:

Testing of ignition for internal-combustion engines

F02P 17/00

Extinguishing-devices, e.g. for blowing-out or snuffing candle flames (for cigarettes A24F)
References
Limiting references

This place does not cover:

Extinguishers for cigars or cigarettes

A24F 13/18

Ash-trays with extinguishers

A24F 19/14

Fire extinguishing specially adapted for particular objects or places

A62C 3/00

Portable extinguishers

A62C 11/00, A62C 25/00

Fire extinguishing compositions; use of chemical substances in extinguishing fires

A62D 1/00

Candles with incorporated means (e.g. impregnated wicks) for self-extinguishing

C11C 5/006

Informative references

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

Safety devices on wick burners

F23D 3/26