Light emitting diode watch with acceleration responsive switch

Details Light emitting diode watch with acceleration responsive switch Light emitting diode watch with acceleration responsive switch

1975-08-13

1977-07-19

Schaefer, Robert K.

58 23R, G04B 1930

Patent

active

040360075

ABSTRACT:
In electronic wrist watches in which figures for the time are displayed by light emitting diodes, and in watches with liquid crystal displays where the display is illuminated by a light emitting diode, it is necessary to have the diodes normally unenergized in order to conserve battery power. A switch must be closed to energize the diodes when the display of time is desired. Since the hand of the wrist on which the watch is worn cannot reach the switch, it is necessary for the wearer of the watch to use his other hand to operate the switch and thus both hands are effectively involved in order to tell the time. This invention provides the watch with an acceleration-responsive switch that permits display of the time by a quick movement of the wrist and without involving any manual operation.

REFERENCES:
patent: 3937002 (1976-02-01), Van Haaften
patent: 3948037 (1976-04-01), Carlone

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