Mechanism to avoid rate variations due to gravitation in a sprung balance regulating organ, and timepiece provided with such a mechanism

A mechanism avoiding the rate variations due to the effect of gravitation on a regulating organ in a clockwork movement of a timepiece where the regulating organ comprises a sprung balance and an escape wheel mounted onto a platform, said platform including a counterweight and being mounted so as to freely rotate about at least a first axis relative to a plate of the movement so that the platform may rotate about the first axis under the effect of terrestrial gravitation;

• wherein the mechanism comprises a wheelwork including a driving kinematical chain linking the escape wheel to a barrel system of the timepiece, as well as a corrective kinematical chain compensating the movements and speed of the platform relative to the plate, so that the movements of the platform do not perturb the chronometry of the timepiece, wherein a fourth wheel of the clockwork movement is placed upon the platform.

Mechanism avoiding the rate variations due to the effect of gravitation on a regulating organ in a clockwork movement of a timepiece where the regulating organ comprises a sprung balance and an escape wheel mounted onto a platform, said platform including a counterweight and being mounted so as to freely rotate about an axis relative to a plate of the movement so that the platform may rotate about the axis under the effect of terrestrial gravitation, the axis of rotation of the platform being parallel to the axis of the sprung balance;

• wherein the mechanism comprises a wheelwork including a driving kinematical chain linking the escape wheel to a barrel system of the timepiece, as well as a corrective kinematical chain compensating the movements and speed of the platform relative to the plate, so that the movements of the platform do not perturb the chronometry of the timepiece, the wheelwork comprising gears with straight toothing exclusively.