Horology: time measuring systems or devices – With calendar indicator
Patent
1992-12-16
1993-08-10
Miska, Vit W.
Horology: time measuring systems or devices
With calendar indicator
368 76, G04B 1924, G04C 300
Patent
active
052355624
ABSTRACT:
A timepiece including automatic backward moving display means. Such invention includes: a horometric movement, an intermediate wheel (22) driven by the movement and including driving gear teeth (26a-26y), a display system (16) for information such as the date, at least one oscillating element (30) coupled to the display system (16) and including driven gear teeth (32) in mesh with the driving gear teeth (26a-26y) of the intermediate wheel (22), return means (34) for the oscillating element (30), declutching means (40, 40a) to enable the oscillating element (30) to effect a free backward motion, and an abutment (B) associated with a counter-abutment (CB) in order to limit the backward movement of the oscillating element (30), this invention being characterized in that the counter-abutment (CB) is formed by one (26a) of the driving gear teeth (26a-26y) of the intermediate wheel (22) which, during driving, normally meshes with the driven teeth (32) of the oscillating element (30).
REFERENCES:
patent: 1846962 (1932-02-01), Gries
patent: 3842590 (1974-10-01), Kato
patent: 4232510 (1980-11-01), Tamaru et al.
patent: 5177712 (1993-01-01), Kakilama
Compagnie Des Montres Longines, Francillon S.A.
Miska Vit W.
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