Watch movement having date and phases of the moon indicators

Details Watch movement having date and phases of the moon indicators Watch movement having date and phases of the moon indicators

1988-09-16

1989-11-14

Miska, Vit W.

Horology: time measuring systems or devices

Astronomical

G04B 1926

Patent

active

048812137

ABSTRACT:
A watch movement has indicators for the date and the phases of the moon, these two indicators being automatically driven by the same intermediate revolving wheel member effecting one revolution every 24 hours, the one indicator by one tooth longer than the others and the other indicator by a pin which acts on a wheel having fifty-nine teeth integral with the indicator of the phases of the moon. A satisfactory engagement of the driving members in the corresponding teeth is ensured by a transverse displacement of the revolving wheel member resulting from the fact that a resilient arm of this revolving wheel member holds the edges thereof resting permanently against a fixed cylindrical stud having a flat surface.

REFERENCES:
patent: 3721083 (1973-03-01), Tauch
patent: 4548512 (1985-10-01), Erard
"Les montres-calendrier modernes" by B. Humbert published in the "Journal suisse d'horlogerie", pp. 96 and 97, and FIG. 156.

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