Electronic watch with supplemental function display

Details Electronic watch with supplemental function display Electronic watch with supplemental function display

1979-07-27

1981-09-15

Weldon, Ulysses

Horology: time measuring systems or devices

Chronological

With power monitor

368203, 368204, G04B 900

Patent

active

042901294

ABSTRACT:
Electronic circuits provide an indication on the face of an electronic wristwatch that battery voltage has diminished to a prescribed level and provide the same indication regardless of battery voltage by actuation of an external member. Multiple functions are activated by the same external member or members. The desired mode of operation is detected by the circuits dependent upon the position, sequence of operation and time duration in a selected position of an external member. In addition to a battery voltage operating mode, an alternative embodiment permits adjustment of minutes and hours without loss in second-hand accuracy. A counter memorizes elapsed time required for hand setting, and the second hand rapidly moves to its correct position after the hour and minute hands are set. The added function circuits are small, consume negligible power and have no adverse effect on battery life or design complexity.

REFERENCES:
patent: 4058969 (1977-11-01), Tamaru et al.
patent: 4107915 (1978-08-01), Sekiya et al.

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