Electromagnetic motor with two rotation senses particularly intended for a timepiece
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United States of America Patent
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-
Apr 12, 1994
Grant Date -
N/A
app pub date -
Apr 17, 1992
filing date -
Apr 19, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This n-phased electromagnetic motor having two rotation senses and in which n is greater than 1, is particularly intended to drive the mechanism of a timepiece movement. It comprises n magnetic circuits, each being magnetically decoupled from n-1 other magnetic circuits. Each magnetic circuit includes two stator poles (4a and 4c, 4b and 4d) each comprising a polar expansion (6a to 6d respectively) partially defining a stator cavity (3) in which a rotor (2) is housed. These two stator poles are diametrally opposite one another relative to the axis (X--X) of the rotor (2). The magnetic separation of the magnetic circuits is assured by means of one or several gap(s) (15) judiciously arranged.
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