wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork

Full Title

Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means (clocks driven by synchronous motors G04C15/00) > wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork

Child Classifications

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• G04C 3/10 driven by electromagnetic means
• G04C 3/12 driven by piezoelectric means; driven by magneto-strictive means