Patent ID: 7134783

Claim:
A device for adjusting a time indicator of a timepiece including a gear train, a kinematic chain of which includes a sliding pinion driven by a driving wheel set, the sliding pinion driving a driven wheel set when the driving wheel set rotates in a first direction and disconnecting from the driven wheel set when the driving wheel set rotates in a second direction, opposite to the first direction, to interrupt said kinematic chain, wherein a shaft that the sliding pinion includes is engaged in a groove having first and second end portions, at least the first end portion of said groove being directed radially to the driven wheel set wherein the at least first end portion is arranged on a side of the driven wheel set, wherein the sliding pinion follows a path extending radially with respect to a center of the driven wheel set when the sliding pinion engages with, and respectively disengages from, the driven wheel set, so engaging and disengaging movement of the driving wheel set occurs without changing angular position of the driven wheel set.