Chronograph

Details Chronograph Chronograph

2005-01-11

2005-01-11

Cuneo, Kamand (Department: 2841)

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

C368S106000

Reexamination Certificate

active

06842403

ABSTRACT:
The invention relates to a chronograph having a chronograph drive by means of which, when a first actuating element is actuated manually, a chronograph-hand stem of a chronograph hand can be driven in rotation, and having a rattrapante-hand stem, coaxial with the chronograph-hand stem, of a rattrapante hand which can be driven in an overlapping manner with the chronograph hand. A seconds heart cam for resetting the chronograph hand is arranged on the chronograph-hand stem, and the chronograph-hand stem and rattrapante-hand stem are connected to one another in a rotationally fixed manner by a rattrapante heart cam of a force-fitting coupling. A rattrapante wheel6is arranged on the rattrapante-hand stem, can be encompassed under spring prestressing by the gripper arms of a rattrapante gripper and can be blocked against rotation by a friection or form fit. A switching element which can be moved, by manual actuation of a second actuating element, between a blocking position and an unblocking position and by means of which the gripper arms can be lifted off from the rattrapante wheel, out of their rotation-blocking position.

REFERENCES:
patent: 4588305 (1986-05-01), Piguet et al.
patent: 4681464 (1987-07-01), Ray
patent: 5793708 (1998-08-01), Schmidt et al.
patent: 6428201 (2002-08-01), Shibuya et al.
patent: 682201 (1993-08-01), None
patent: 42 09 580 (1993-09-01), None

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