using devices responsive to thermal changes or to thermal expansion of a medium

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Systems for controlling combustion > using devices responsive to thermal changes or to thermal expansion of a medium

CPC:

Systems for controlling combustion (regulating fuel supply F23N1/00, regulating air supply or draught F23N3/00) > using devices responsive to thermal changes or to thermal expansion of a medium

Of 9 combined children, 6 exist in both systems.

3 codes are CPC-only extensions.

Child Classifications

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F23N 5/022 CPC only CPC only
F23N 5/025 CPC only CPC only
F23N 5/027 CPC only CPC only
F23N 5/04 using bimetallic elements +3 CPC IPC+CPC Available in IPC and CPC
F23N 5/06 using bellows; using diaphragms +3 CPC IPC+CPC Available in IPC and CPC
F23N 5/08 using light-sensitive elements +3 CPC IPC+CPC Available in IPC and CPC
F23N 5/10 using thermocouples +3 CPC IPC+CPC Available in IPC and CPC
F23N 5/12 using ionisation-sensitive elements, i.e. flame rods +2 CPC IPC+CPC Available in IPC and CPC
F23N 5/14 using thermo-sensitive resistors +2 CPC IPC+CPC Available in IPC and CPC