Moslem calendar

Details Moslem calendar Moslem calendar

1993-12-22

1995-01-03

Roskoski, Bernard

Horology: time measuring systems or devices

With calendar indicator

Movable ring or disk

368 28, G04B 1924

Patent

active

053792726

ABSTRACT:
A first mechanism (2, 5, 8, 18, 20) of the calendar drives a date indicator, bearing numbers 1 to 30, by one one-day step at the end of each day, off a rotary part (1) of an analog timepiece movement. A second mechanism (60, 62) causes the date indicator, in cooperation with the first mechanism, to move forward from the 29th to the 1st of the following month at the end of the even months. A third mechanism (75, 79, 95, 97) inhibits the action of the second mechanism at the end of the embolismic (or abundant) years whereby at the twelfth and final month of these years the date indicator displays 30 before proceeding to the 1st. The calendar is perpetual, and a date-corrector (11) and a month-corrector (54) enable the calendar to be updated.

REFERENCES:
patent: 4253169 (1981-02-01), Salah
patent: 4676659 (1987-06-01), Vuilleumier
patent: 4766579 (1988-08-01), Sporrig

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