Battery life indication method for an electronic timepiece

Details Battery life indication method for an electronic timepiece Battery life indication method for an electronic timepiece

1979-01-29

1982-02-16

Weldon, Ulysses

Horology: time measuring systems or devices

Chronological

With power monitor

368203, 368204, G04B 900

Patent

active

043162746

ABSTRACT:
The degenerating condition of the power source in an electronic timepiece, that is, a diminished battery voltage, is indicated to the user by unusual performance of the watch bands. Short periods of accelerated or decelerated hand movements alert the user to the battery condition. Persistent though intermittent unusual hand behavior distinguishes the battery life signals from malfunctions or poor timekeeping. A voltage detector circuit monitors the power source and on low voltage initiates the warning signals which are derived from the divider network of the timepiece. Mechanically resetting the hands to remove the visible effects or erratic hand movement, serves to reset the battery life detector circuits and repeat the warnings.

REFERENCES:
patent: 3762153 (1973-10-01), Komiyama et al.
patent: 3998043 (1976-12-01), Tamaru et al.
patent: 4014164 (1977-03-01), Fujita
patent: 4028880 (1977-06-01), Ueda

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