1977-02-02
1978-12-19
Schaefer, Robert K.
58 23BA, G04C 300
Patent
active
041299817
ABSTRACT:
An electronic timepiece having a reversible stepping motor to actuate time-indicating hands to provide a time display, which comprises a driver circuit to produce driving current pulses composed of compound pulses appearing each time unit. A rotor of the stepping motor rotates a plurality of steps during each time unit to cause one of the time-indicating hands to advance through unequal intervals to provide a modulated display.
REFERENCES:
patent: 3668859 (1972-06-01), Polin et al.
patent: 3898790 (1975-08-01), Takamune et al.
patent: 3998043 (1976-12-01), Tamaru et al.
patent: 4014164 (1977-03-01), Fujita
patent: 4050234 (1977-09-01), Toshio
Machida Takayasu
Nakajima Fumio
Nomura Yasushi
Yamada Kenji
Citizen Watch Company Limited
Jordan Frank J.
Miska Vit W.
Schaefer Robert K.
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