G04C21/20 - CPC Classification Index

ClassID:

179501 ⎘

G04C21/20 - CPC Classification

Classification description:

Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to ring an electromechanical alarm

Sub-classes:

G04C21/205 » {by the hand(s) or handlike members closing the contact} 0
G04C21/22 » put into action by the arbor of a mechanical alarm work 1
G04C21/24 » put into action by the spring of a mechanical alarm work 0
G04C21/26 » put into action by the vibrations caused by the operation of a mechanical alarm work 0