Watch movement driven by a spring and regulated by an electronic circuit
OwnerJean-Claude Berneyinventor
Life of this patent
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Abstract
An electronically regulated watch movement comprising a time-wheel mechanism driven by a drive, a generator being coupled to the drive via at least a portion of the time-wheel mechanism and with substantial gear reduction. The generator includes a rotor with magnets and coils for producing a.c. voltage at a frequency of operation FG. An electronic regulating circuit is connected to the generator and includes an oscillator for producing a precise reference frequency FR and a comparator having inputs receiving frequencies FR and FG to compare the same. A power source is connected to the comparator and the generator to supply current to the generator when FG > FR to brake the generator until FG = FR and thereby provide a regulated operation of the time-wheel mechanism.
Claims10
A watch movement comprising a drive means, a time-wheel mechanism driven by said drive means, a generator coupled to said drive means via at least a portion of said time-wheel mechanism and with substantial gear reduction, said generator including means for producing a.c. voltage at a frequency of operation F.sub.G, and an electronic regulating circuit connected to said generator, said circuit comprising an oscillator means for producing a precise reference frequency FR, a comparator having inputs receiving frequencies F.sub.R and F.sub.G to compare the same, and a charging means connected to the comparator and the generator to supply current to the generator when F.sub.G >
- F.sub.R to brake the generator until F.sub.G = F.sub.R and thereby provide a regulated operation of said time-wheel mechanism.
Dependencies are inferred from the claim text.