DIFF Subgroup
G05D 23/19 characterised by the use of electric means
Introduced: September 1968
Full Title
Control of temperature > characterised by the use of electric means
CPC subdivides this area 3x more granularly than IPC with 7 additional codes.
7 codes are CPC-only extensions.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- G05D 23/20 with sensing elements having variation of electric or magnetic properties with change of temperature (G05D23/13 takes precedence) +2 CPC IPC+CPC Available in IPC and CPC
- G05D 23/275 with sensing element expanding, contracting, or fusing in response to changes of temperature +1 CPC IPC+CPC Available in IPC and CPC
- G05D 23/30 Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature +1 CPC IPC+CPC Available in IPC and CPC