Mechanical digital stopwatch

Details Mechanical digital stopwatch Mechanical digital stopwatch

1976-11-26

1978-07-18

Weldon, Ulysses

58 75, 58 76, 58 79, 58145D, 58126A, 58125B, G04F 704

Patent

active

041007280

ABSTRACT:
A mechanical spring-powered hand-held digital stopwatch having a gear-operated decade counter display assembly, a spring-powered windup mechanism adapted to reset the counter during winding by means of a unidirectionally activated ratchet assembly, and a cam adjustable timing escapement mechanism, the escapement mechanism including an escapement gear actuating a balance through a limited pivotal angle, the angle of pivoting being governed by cam means interposed between a pair of arms carried by the balance.

REFERENCES:
patent: 2512088 (1950-06-01), Buchler
patent: 3495397 (1970-02-01), Dubois
patent: 3557547 (1971-01-01), Reiminger
patent: 3636700 (1971-01-01), Stemmler
patent: 3688491 (1972-09-01), Dubois
patent: 3927519 (1975-12-01), Berthond

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