System for signalling the termination of the lifetime of a battery for electronic timepieces
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United States of America Patent
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Apr 14, 1981
Grant Date -
N/A
app pub date -
Dec 4, 1978
filing date -
Dec 7, 1977
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for signalling the termination of the lifetime of a battery for an electronic timepiece is disclosed. The system includes a hand display device, an electro-optical display device, a battery voltage detecting circuit adapted to produce a signal when voltage of the battery lowers below a predetermined value, and means for modulating the time display pulse to be applied to one of the display devices in response to the signal generated in the battery voltage detecting circuit, thereby to modifying the time display for informing the end of the battery lifetime.
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