Timepiece with a chronograph mechanism
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United States of America Patent
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Aug 11, 1998
Grant Date -
N/A
app pub date -
Oct 29, 1996
filing date -
Oct 31, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A chronograph mechanism comprises a coupling member (17) engaging, on the one hand, with a pinion (15') solid with the seconds wheel and, on the other hand, with the chronograph's seconds wheel (18). This coupling member (17) also carries a retractable finger (27) adapted to drive, each turn, the first rotatable member (35) of a cinematic transmission connecting together a rotatable member (38) of the minutes wheel to that of the hours counter (41). This transmission is indexed, between two drives by the retractable finger (27), by a jumper (51) engaged in an intermediate wheel (37) of this transmission. The coupling member (17) is controlled by two levers (44, 45), one lever (44) carrying a pin (44c) which, in the uncoupled position, locks the jumper (51) in the intermediate wheel (37)'s toothing. The minutes and hours counter rotatable members (38, 41), solid with zero setting cams (42, 43), are friction fitted on their respective axles.
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