Timepiece comprising a mechanical movement whose rate is regulated by an electronic device
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United States of America Patent
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Aug 16, 2022
Grant Date -
Sep 19, 2019
app pub date -
Mar 15, 2019
filing date -
Mar 16, 2018
priority date (Note) -
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Abstract
A timepiece includes a mechanical oscillator, formed by a balance and a piezoelectric balance spring, and a regulating device for regulating the frequency of the mechanical oscillator which is arranged to be able to produce time-separated regulating pulses, each consisting of a momentary decrease in an electrical resistance applied by the regulating device between two electrodes of the balance spring relative to a nominal electrical resistance. Each regulating pulse produces a variation of rate which varies as a function of its moment of starting in a half-period of the mechanical oscillator, the characteristic function of this variation of rate relative to the moment of starting of at least one regulating pulse respectively in at least one half-period of the mechanical oscillator being negative in a first temporal zone of at least one half-period and positive in a second temporal zone of at least one half-period.
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