Instantaneous calendar device for timepieces

Details Instantaneous calendar device for timepieces Instantaneous calendar device for timepieces

1979-03-05

1980-12-23

Jackmon, Edith S.

Horology: time measuring systems or devices

With calendar indicator

368 37, 368 77, 368221, G04B 1924, G04B 1902

Patent

active

042402492

ABSTRACT:
A day disk cooperates with a storage of mechanical energy via a seven-position Maltese mechanism. A Maltese cross of said mechanism is rigidly coupled to and coaxial with the day disk. A transfer pin of the Maltese cross is set on an intermediate gear of the storage. A driven disk includes a projection for the transfer of a toothed date ring. The locking surfaces of the Maltese cross lock on the driven disk. Provision is made of a free unloaded lever with one arm locking in position the date ring and the other arm of said lever resting against the projections of the Maltese cross, thereby relieving the moment of load of the calendar device on the gear train and improving the reliability of the timepiece.

REFERENCES:
patent: 3186159 (1965-06-01), Schneiter
patent: 3969888 (1976-07-01), Veuilleumier et al.

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