Correction device for a timepiece

Abstract

A correction device for a timepiece, including a differential gear having a first input, a second input and an outlet output, wherein: — the first inlct input is arranged to be driven by a timepiece movement; — the second input is kinematically linked with a corrector gear extending from a control member and including a clutch for establishing and interrupting the kinematic link between the control member and the second input; — the output is arranged to drive a display device of the timepiece movement, the angular position of the output being defined on the basis of the angular position of the first input as well as on that of the second input, wherein the correction device further includes a memory cam desmodromically linked with the second input, in that the memory cam experiences a return force provided by a resilient member tending to maintain the memory cam in at least one predetermined angular position when the kinematic link between the control member and the second input is interrupted, the resilient member also being arranged to allow a rotation of the second input under the control of the control member when the kinematic link is established during the use of the correction device, and in that the correction device is arranged so that the incidence of the rotation of the second input during a correction on the angular position of the output is removed when the memory cam is located in the at least one predetermined angular position.

Dependencies are inferred from the claim text.