Chronograph timepiece having zeroing structure

Details Chronograph timepiece having zeroing structure Chronograph timepiece having zeroing structure

2006-04-18

2006-04-18

Cuneo, Kamand (Department: 2841)

Horology: time measuring systems or devices

Time interval

Mechanical stop time type

C368S110000, C368S220000

Reexamination Certificate

active

07029169

ABSTRACT:
To realize a chronograph timepiece capable of firmly and simultaneously zeroing an hour heart cam, a second heart cam and a minute heart cam. A chronograph timepiece of the invention includes a hammer operated by operating a reset button for controlling to operate to zero an hour chronograph wheel & pinion, a minute chronograph wheel & pinion and a second chronograph wheel & pinion. When the hammer is brought into contact with an hour heart cam, a second heart cam and a minute heart cam, a position of the hammer is determined only by the hour heart cam, the second heart cam and the minute heart cam. When the hammer is brought into contact with the hour heart cam, the second heart cam and the minute heart cam, a direction of a press force exerted to the hammer is constituted to pass a rotational center of the second chronograph wheel.

REFERENCES:
patent: 5220541 (1993-06-01), Vuilleumier
patent: 5793708 (1998-08-01), Schmidt et al.
patent: 6406176 (2002-06-01), Takahashi et al.
patent: 6428201 (2002-08-01), Shibuya et al.
patent: 9178868 (1997-07-01), None
patent: 11023741 (1999-01-01), None
patent: 3336041 (2002-08-01), None

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