Mechanism for driving the hands of an electromechanical watch, provided with a locking device
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United States of America Patent
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Nov 17, 2015
Grant Date -
May 29, 2014
app pub date -
Nov 18, 2013
filing date -
Nov 23, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A mechanism drives the hands of an electromechanical watch. It includes an electric motor, a set of gear wheels connected to the electric motor to move the hands forward or backward on each actuation of the electric motor, and a locking device. The locking device includes a piezoelectric actuator for locking, in a rest mode, directly or via a bolt, one wheel of the set between each actuation of the electric motor. The piezoelectric actuator releases the wheel of the set of gear wheels, when it is actuated by an electrical signal at the moment of each actuation of the electric motor to move the hands forward or backward.
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