Horology: time measuring systems or devices – With calendar indicator
Reexamination Certificate
2005-08-23
2005-08-23
Miska, Vit W. (Department: 2841)
Horology: time measuring systems or devices
With calendar indicator
C368S035000, C368S037000
Reexamination Certificate
active
06934221
ABSTRACT:
Date mechanism for a timepiece such as a wristwatch including two superposed respectively lower (6) and upper (4) date rings, whose surface is divided into a plurality of sectors, the upper ring (4) including sixteen sectors, fifteen of which respectively bear fifteen successive markings of a cycle of 31 positions, and the sixteenth of which is an extra sector having an open or transparent aperture (8), whereas the lower ring (6) includes seventeen sectors, sixteen of which bear respectively the other sixteen markings of the cycle of 31 positions, and the seventeenth of which is an extra sector, each of said rings cooperating with drive means such that the markings appear successively in a display zone (20) the date mechanism further including a jumper-effect stopping device (22) able to stop each ring (4, 6) in any desired position, the date mechanism being characterised in that one location on the upper ring (4) and one location on the lower ring (6) is provided with a thinned tooth (14) and (16), located between two successive teeth (10) or (12) of the toothing of the ring (4) or (6) concerned, the position of the drive means with respect to the toothing of the rings (4, 6) being such that when a ring (4) or (6) has its extra sector at the location of the display zone (20), the thinned tooth (14) or (16) is located opposite the drive means such that said drive means only drive the other ring, the thinned teeth (14, 16) not disturbing the movement of the drive means and allowing the stopping device (22) to be constantly housed between two successive teeth (10) or (12) of each of the rings (4, 6).
REFERENCES:
patent: 4257113 (1981-03-01), Meister et al.
patent: 6711100 (2004-03-01), Rochat et al.
patent: 6735151 (2004-05-01), Triponez
patent: 6738316 (2004-05-01), Gabathuler et al.
patent: 660 941 (1987-06-01), None
patent: 198 45 539 (2000-04-01), None
patent: 957 031 (1964-05-01), None
European Search Report, completed Jun. 21, 2004.
Bettelini Marco
Metzger Roger
Willemin Roger
ETA SA Manufacture Horlogére Suisse
Griffin & Szipl, P.C.
Miska Vit W.
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