Calendar mechanism for displaying the date and the day of...

Details Calendar mechanism for displaying the date and the day of... Calendar mechanism for displaying the date and the day of...

2003-12-18

2008-10-07

Luebke, Renee S (Department: 2833)

Horology: time measuring systems or devices

With calendar indicator

Reexamination Certificate

active

07433271

ABSTRACT:
The invention is a timepiece calendar mechanism for displaying the date and the day of the week, including a date indicator in the form of an internally toothed crown. The date indicator is driven by a first drive wheel having an external toothing so as to be able to be driven about an axis of rotation by a wheel set secured to an hour wheel of the timepiece. The toothing includes a prominent tooth, longer than the others, which abuts against a tooth of the inner toothing of the date indicator to move it forward one day in a time interval located around a determined time of the day. The mechanism also includes a day of the week indicator that moves forward one day during the time interval.

REFERENCES:
patent: 2757507 (1956-08-01), Boyles
patent: 3777582 (1973-12-01), Durdin
patent: 3969888 (1976-07-01), Veuilleumier et al.
patent: 4059953 (1977-11-01), Morrison et al.
patent: 4473301 (1984-09-01), Namyslo
patent: 684 980 (1995-02-01), None
International Search Report issued in corresponding application PCT/EP/51044 completed Jul. 13, 2004 and mailed Jul. 20, 2004.

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