1977-01-21
1979-04-24
Witkowski, Stanley J.
58 23BA, 58 34, 58 855, G04C 900
Patent
active
041505360
ABSTRACT:
An electronic timepiece includes a reversible stepping motor to drive rotatable hands to provide a time display. In a first preferred embodiment, the electronic timepiece includes a circuit means to generate alternating current pulses having an increased pulse width or an increased amplitude to drive the stepping motor with an increased driving current during high speed time correction when a manually operable external control member is actuated during time correction. In a second preferred embodiment, the electronic timepiece comprises a clockwise correction switch, a counter-clockwise correction switch and circuit means for generating first and second alternating current pulses of first and second pulse widths at a predetermined frequency higher than normal driving pulses to drive a stepping motor in clockwise and counter-clockwise directions, respectively, to perform clockwise and counter-clockwise corrections when the clockwise and counter-clockwise correction switches are actuated during time corrections, respectively. The pulse width of the second alternating current pulses is selected to be smaller than that of the normal driving pulses.
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Machida Takayasu
Nakajima Fumio
Nomura Yasushi
Watanabe Minoru
Yamada Kenji
Citizen Watch Company Limited
Jordan Frank J.
Witkowski Stanley J.
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