CH557056ACH991372ACH991372ACH557056ACH 557056 ACH557056 ACH 557056ACH 991372 ACH991372 ACH 991372ACH 991372 ACH991372 ACH 991372ACH 557056 ACH557056 ACH 557056A
Authority
CH
Switzerland
Application number
CH991372A
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Publication date
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Publication of CH557056ApublicationCriticalpatent/CH557056A/xx
G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
G04C3/08—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically
G04C3/10—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means