CPC Definition - Subclass F23Q
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.
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.
This place does not cover:
Match receptacles or boxes | |
Devices for igniting matches | |
Hand fire extinguishers | |
Chemical contact igniters, e.g. catalytic igniters | |
Flints (composition, manufacture) | |
Matches | |
Fire-lighters | |
Candles with incorporated means (e.g. impregnated wicks) for self-extinguishing | |
Ignition arrangements for blasting |
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 | |
Combinations of lighters and smokers requisites | |
Time-controlled igniting mechanisms for cooking-vessels | |
Charcoal igniting devices for barbecues or the like | |
Arrangements for igniting thermal or catalytic exhaust converters | |
Ignition of light sources using charges of combustible material | |
Igniting devices; fire-igniting fans used in connections with stoves or ranges for solid fuels | |
Arrangement or mounting of ignition devices in stoves or ranges for gaseous fuel | |
Arrangement or mounting of ignition devices in stoves or ranges for liquid fuel |
Attention is drawn to the following places, which may be of interest for search:
Smokers' requisites; match boxes | |
Fire-fighting | |
Explosive or thermic compositions | |
Detonating or priming devices; Fuses | |
Ignition for internal-combustion engines | |
Details for lighting devices | |
Methods or apparatus for combustion using only solid fuel | |
Methods or apparatus for combustion using fluent fuel | |
Burners | |
Gas burners with provision for a retention flame | |
Cremation furnaces; Consuming waste by combustion | |
Safety arrangements for combustion chambers | |
Regulating or controlling combustion | |
Generating combustion products of high pressure or high velocity, e.g. gas turbine combustion chambers | |
Domestic stoves or ranges for solid fuels; Implements for use in connection with stoves or ranges | |
Stoves or ranges for gaseous or liquid fuels | |
Spark gaps; Sparking plugs | |
Electric heating, e.g. ohmic resistance heating |
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. |
This place does not cover:
Lighters with incandescent ignition but without fuel | |
Lighters using solar energy |
Attention is drawn to the following places, which may be of interest for search:
Valves in general |
Attention is drawn to the following places, which may be of interest for search:
Sparking plugs | |
Circuits for generating electric pulses | |
Piezoelectric or electrostrictive devices |
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.
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Attention is drawn to the following places, which may be of interest for search:
Electrically heated lighters in vehicle passenger accommodation | |
Heating of combustion-air in combustion engines by flame generating means, e.g. flame glow-plugs | |
Layout of circuits of apparatus having glowing plugs | |
Devices or apparatus for detecting or indicating knocks in internal- combustions engines | |
Circuits specially adapted for spark gaps, e.g. ignition circuits |
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 |
Attention is drawn to the following places, which may be of interest for search:
Protection against flame failure by using flame detection devices |
This place does not cover:
Testing of ignition for internal-combustion engines |
This place does not cover:
Extinguishers for cigars or cigarettes | |
Ash-trays with extinguishers | |
Fire extinguishing specially adapted for particular objects or places | |
Portable extinguishers | |
Fire extinguishing compositions; use of chemical substances in extinguishing fires | |
Candles with incorporated means (e.g. impregnated wicks) for self-extinguishing |
Attention is drawn to the following places, which may be of interest for search:
Safety devices on wick burners |