Digital display mechanism for a time-keeper

Details Digital display mechanism for a time-keeper Digital display mechanism for a time-keeper

1975-02-28

1976-09-28

Jackmon, E. S.

58 5, 58 58, 58125B, G04B 2706, G04B 1924, G04B 1902

Patent

active

039823881

ABSTRACT:
An instantaneous or step by step display mechanism for a time-keeper, including a constantly rotating driving wheel, a toothed wheel fixed to a first indication disc, a ratchet wheel also fixed to the indication disc, and a lever pivoted at one end, and carrying a dog engaging with the ratchet wheel, and an intermediate toothed wheel, at the other end. The intermediate wheel meshes with both the driving and indication disc wheels and when in use constantly runs up the indication disc wheel, carrying its end of the lever with it until the dog frees one tooth of the ratchet wheel, whereupon the lever falls back, advancing the display by one figure. The stem of the watch, when pulled, disengages the dog from the ratchet wheel and allows correction of the display, forwards or backwards. Minute, hour or date wheels may be provided.

REFERENCES:
patent: 2633696 (1953-04-01), Youhouse
patent: 3775966 (1973-12-01), Matsuura

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