Patent ID: 7837381
Filing Date: 2010-11-23
Classification: G04B

Abstract:
1. An automatic mechanical winding device for the driving spring of a mechanical clockwork of a wristwatch, with an eccentric mass that can be swiveled on a joint, said mass having a center of mass that is radially offset from the axis of the joint, with gear means for converting the swivel or rotary motion of the eccentric mass into a motion that winds the driving spring, wherein the near means comprises at least one double-acting pawl array, the at least one double-acting pawl array comprises: at least one ratchet wheel, at least two pawl lever supports connected in a driven manner with each other for a contradirectional rotary or swivel motion, and at least two pawl levers engaging with the ratchet wheel, said at least two pawl lever supports swiveled on an axis by the eccentric mass, at least one pawl lever engaging with the ratchet wheel is hinged on one of the pawl lever supports radially offset from the swivel axis of the pawl lever support so that the pawl lever engaging with the ratchet wheel causes said wheel to turn upon the swiveled or rotary motion of the eccentric mass.