CH557560ACH268870ACH268870ACH557560ACH 557560 ACH557560 ACH 557560ACH 268870 ACH268870 ACH 268870ACH 268870 ACH268870 ACH 268870ACH 557560 ACH557560 ACH 557560A
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CH
Switzerland
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CH268870A
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Publication of CH557560ApublicationCriticalpatent/CH557560A/xx
G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
G04C3/04—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 balance
G04C3/06—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 balance using electromagnetic coupling between electric power source and balance
G04C3/065—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 balance using electromagnetic coupling between electric power source and balance the balance controlling gear-train by means of static switches, e.g. transistor circuits
G04C3/067—Driving circuits with distinct detecting and driving coils
G04C3/068—Driving circuits with distinct detecting and driving coils provided with automatic control