Primary clocks

Introduced: September 1968

Full Title

Driving mechanisms for clocks by primary clocks > Circuit arrangements; Electric clock installations > Primary clocks

CPC subdivides this area 4x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

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G04C 13/0409 +2 CPC CPC only CPC only
G04C 13/0436 +2 CPC CPC only CPC only
G04C 13/0463 +3 CPC CPC only CPC only
G04C 13/06 Contact devices (for simultaneously winding several clocks G04C1/00) +1 CPC IPC+CPC Available in IPC and CPC