Details

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Switches operated by change of a physical condition > Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow > Details

CPC:

Switches operated by change of a physical condition (operated by change of magnetic or electric field H01H36/00; thermally-actuated switches H01H37/00) > Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow (wherein the change of pressure is caused by change of temperature H01H37/36) > Details

CPC subdivides this area 4x more granularly than IPC with 6 additional codes.

6 codes are CPC-only extensions.

Child Classifications

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H01H 35/2607 +4 CPC CPC only CPC only
H01H 35/2657 +1 CPC CPC only CPC only
H01H 35/2671 CPC only CPC only
H01H 35/2678 CPC only CPC only
H01H 35/2685 CPC only CPC only
H01H 35/2692 CPC only CPC only
H01H 35/28 Compensation for variation of ambient pressure or temperature IPC+CPC Available in IPC and CPC
H01H 35/30 Means for transmitting pressure to pressure-responsive operating part, e.g. by capsule and capillary tube IPC+CPC Available in IPC and CPC