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Publication of FR629077ApublicationCriticalpatent/FR629077A/fr
G04C21/00—Producing acoustic time signals by electrical means
G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
G04C21/20—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to ring an electromechanical alarm
G04C21/205—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to ring an electromechanical alarm by the hand(s) or handlike members closing the contact
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FR629077D1927-02-141927-02-14Dispositif de contact électrique pour horlogerie
ExpiredFR629077A
(fr)