DIFF Subgroup
G04C 21/22 put into action by the arbor of a mechanical alarm work
Introduced: September 1968
Full Title
Producing acoustic time signals by electrical means > producing the signals at adjustable fixed times > by closing a contact to ring an electromechanical alarm > put into action by the arbor of a mechanical alarm work
No child classifications to compare. This is a leaf node in both IPC and CPC.