Chronograph

Details Chronograph Chronograph

2006-03-21

2006-03-21

Miska, Vit W. (Department: 2841)

Horology: time measuring systems or devices

Time interval

Mechanical stop time type

C368S106000

Reexamination Certificate

active

07014356

ABSTRACT:
A chronograph has a clock movement for driving a second chronograph hand and a minute chronograph hand and a control apparatus for stopping the second chronograph hand and the minute chronograph hand and for setting in motion a rattrapante mechanism of a second rattrapante indicator and a minute rattrapante indicator. The rattrapante mechanism has a common trip element for starting and stopping the second rattrapante indicator and the minute rattrapante indicator. A catch is triggered by the common trip element for engaging or disengaging from a ratchet recess of a plurality of ratchet recesses that are distributed evenly on the periphery of a minute rattrapante wheel. The minute rattrapante wheel is connected to a minute rattrapante shaft of a minute rattrapante indicator. The number of ratchet recesses on the minute rattrapante wheel corresponds to the number of increments of the minute chronograph hand per revolution.

REFERENCES:
patent: 253338 (1882-02-01), Audemars
patent: 355403 (1887-01-01), Lecoultre
patent: 394933 (1888-12-01), Piquet
patent: 426396 (1890-04-01), Schlatter
patent: 479900 (1892-08-01), Piquet
patent: 550182 (1895-11-01), Lecoultre-Piguet
patent: 552715 (1896-01-01), Lugrin
patent: 2548101 (1951-04-01), Dubey et al.
patent: 5122995 (1992-06-01), Vuilleumier
patent: 6842403 (2005-01-01), Meis
patent: 1 003 141 (1957-02-01), None

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