Watch monitor

Details Watch monitor Watch monitor

1975-06-09

1977-01-18

Weldon, Ulysses

58 23BA, 58152H, G04B 1934

Patent

active

040031977

ABSTRACT:
A crystal controlled digital wristwatch is provided with light emitting diodes in a pattern on its face which are periodically energized by low frequency, low current pulses derived from digital divider networks in the watch to provide blinking lights. When a manual push-button is depressed to illuminate the digital display of the watch, the circuit to the blinking lights is disconnected. The blinking lights serve as a monitor to indicate that the watch is operating correctly. When the battery is drained beyond a given point, the blinking lights are no longer energized advising the user that the battery is low.

REFERENCES:
patent: 3672155 (1972-06-01), Bergey et al.
patent: 3802182 (1974-04-01), Fujita
patent: 3841087 (1974-10-01), Kikuchi
patent: 3889459 (1975-06-01), Lu
patent: 3898790 (1975-08-01), Takamune et al.

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