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Publication of FR704970ApublicationCriticalpatent/FR704970A/fr
G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
G04C3/02—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a pendulum
G04C3/027—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a pendulum using electromagnetic coupling between electric power source and pendulum
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FR704970D1930-01-251930-01-25Dispositif de contact pour horloges électriques à entretien pendulaire
ExpiredFR704970A
(fr)