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Publication of FR1023031ApublicationCriticalpatent/FR1023031A/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
G04C21/22—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
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FR1023031D1950-08-051950-08-05Dispositif de réveil pour l'allumage d'une ou plusieurs lampes électriques
ExpiredFR1023031A
(fr)