Driving device especially for a timepiece
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United States of America Patent
Stats
-
Jan 4, 1983
Grant Date -
N/A
app pub date -
Aug 31, 1978
filing date -
Sep 2, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Driving device especially for a timepiece, constituted by a stepping motor the stator of which comprises a coil having a single winding and the rotor of which is constituted of a permanent magnet and of a control electronic circuit able to deliver pulses of current to the motor. The motor includes precise positioning magnets for its rotor which are active in the absence of the pulses. The electronic control circuit is arranged in such a way that the pulses are delivered in pairs, with opposed polarities in each pair, the order of succession of the polarities in a pair determining the sense of rotation of the rotor.
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