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)

Child Classifications

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• G04C 3/001
• G04C 3/008
• G04C 3/02 wherein movement is regulated by a pendulum
• G04C 3/04 wherein movement is regulated by a balance
• G04C 3/08 wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork
• G04C 3/14 incorporating a stepping motor (G04C3/02 - G04C3/12 take precedence )
• G04C 3/16 incorporating an electro-dynamic continuously rotating motor (G04C3/02 - G04C3/12 take precedence)
• G04C 3/18 incorporating electro-thermal or electro-pneumatic driving means