Gear mechanism especially for timepiece

Details Gear mechanism especially for timepiece Gear mechanism especially for timepiece

1991-05-20

1994-01-18

Roskoski, Bernard

Horology: time measuring systems or devices

Time interval

Mechanical stop time type

368113, G04F 700

Patent

active

052804607

ABSTRACT:
A gear mechanism for use in horology is described. The gear mechanism not only returns one of the wheels therein to its original position but also carries along with it a second wheel thereby enabling the mechanism to be made thinner and reducing the number of parts needed to carry out these two functions. The mechanism has a first wheel and a second wheel, the first wheel constituting a toothed wheel fitted on an axis on which is fixed a heart-shaped cam, the point of this cam functioning as the gear engaging means for the second wheel, the cam enabling return of the said first wheel to its starting position by means of a hammer. The invention is of particular value in chronographs.

REFERENCES:
patent: 5113382 (1992-05-01), Bron

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