Date display mechanism and timepiece possessing date display...

Details Date display mechanism and timepiece possessing date display... Date display mechanism and timepiece possessing date display...

2005-06-17

2008-11-25

Miska, Vit W. (Department: 2833)

Horology: time measuring systems or devices

With calendar indicator

Movable ring or disk

C368S028000

Reexamination Certificate

active

07457202

ABSTRACT:
A date display mechanism has a first driving wheel that rotationally drives a first date indicator for displaying places of units and a second driving wheel that rotationally drives a second date indicator for displaying places of tens. The second driving wheel causes the second driving wheel to rotate by one tooth when the date shifts from a 9th day to a l0th day, from a 19th day to a 20th day, and from a 29th day to a 30th day. A program wheel performs one revolution in 31 days and controls rotation of the first date indicator and the second date indicator so that from the 1st day to the 31st day, the first date indicator is rotated by one tooth every day, and so that when the date shifts from the 31st day to 1st day, the first date indicator is retained to a position of the 31st day and the second date indicator is rotated by one tooth to thereby cause the 1st day to be displayed by the date display window.

REFERENCES:
patent: 6081483 (2000-06-01), Capt et al.
patent: 6574167 (2003-06-01), Weissbach et al.
patent: 7102962 (2006-09-01), Suzuki
patent: 7110326 (2006-09-01), Besse
patent: 2003/0193840 (2003-10-01), Huter
patent: 2005/0169109 (2005-08-01), Watanabe
patent: 2005/0174891 (2005-08-01), Besse
patent: 3322678 (2000-05-01), None

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