FR909408A - Dispositif de commande électrique utilisant la clé <<sonnerie>> de tout réveil etse branchant instantanément à l'aide d'une fiche intercalaire
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Dispositif de commande électrique utilisant la clé <<sonnerie>> de tout réveil etse branchant instantanément à l'aide d'une fiche intercalaire
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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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FR909408D1945-02-231945-02-23Dispositif de commande électrique utilisant la clé <<sonnerie>> de tout réveil etse branchant instantanément à l'aide d'une fiche intercalaire
ExpiredFR909408A
(fr)
Dispositif de commande électrique utilisant la clé <<sonnerie>> de tout réveil etse branchant instantanément à l'aide d'une fiche intercalaire