Mechanism to avoid rate variations due to gravitation in a...

Details Mechanism to avoid rate variations due to gravitation in a... Mechanism to avoid rate variations due to gravitation in a...

2008-10-29

2010-10-19

Miska, Vit W (Department: 2833)

Horology: time measuring systems or devices

Escapements

With oscillating or reciprocating means

C368S142000

Reexamination Certificate

active

07815364

ABSTRACT:
The mechanism avoids the rate variations due to the effect of gravitation on a regulating organ of a timepiece whose regulating organ includes a sprung balance and an escape wheel mounted onto a platform. The platform includes an unbalance and is mounted so as to freely rotate about at least a first axis relative to a plate of the movement so that this platform will rotate about the first axis under the effect of terrestrial gravitation. This mechanism includes a wheelwork with a driving kinematical chain linking the escape wheel to a barrel system of the timepiece, and a corrective kinematical chain compensating the movements and speed of the platform relative to the plate, so that these movements of the platform will not perturb the chronometry of the timepiece, this wheelwork including one or several epicycloidal gear trains, each of which contains wheels with straight toothing exclusively.

REFERENCES:
patent: 7004619 (2006-02-01), Papi
patent: 7350966 (2008-04-01), Zaugg
patent: 7677793 (2010-03-01), Lete et al.
patent: 1 615 085 (2006-01-01), None
patent: 2007/006805 (2007-01-01), None
patent: WO 2009/026735 (2009-03-01), None

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