Timepiece movement
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United States of America Patent
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Jul 27, 1999
Grant Date -
N/A
app pub date -
Oct 20, 1997
filing date -
Oct 18, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A timepiece movement comprises a light-emitting device for emitting light and a light-receiving device for receiving the light emitted from the light-emitting device. An hour wheel has a plurality of apertures through which light from the light-emitting device may pass. A minute wheel has an aperture through which light from the light-emitting device may pass, the aperture being positioned to become aligned with respective ones of the apertures of the hour wheel during rotation of the minute and hour wheels. Minute and hour wheel gear trains respectively rotate the minute wheel and the hour wheel as a function of minute and hour time.
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