Patent ID: 8923097

Claim:
A backlash take-up timepiece wheel, for meshing with mobile component toothing formed of external teeth of a given width arranged consecutively with a constant pitch on a pitch circle of an opposing mobile component, said backlash take-up wheel comprising: a backlash take-up wheel toothing arranged on a pitch circle of the backlash take-up wheel to mesh with said mobile component toothing, the backlash take-up wheel toothing including a series of identical pairs of teeth arranged consecutively with a constant backlash take-up wheel pitch on said pitch circle of the backlash take-up wheel, each pair including, on either side of a first radial axis, a first flexible tooth and a second flexible tooth, wherein the pitch thereof varies between two successive teeth, between a smaller pitch which is smaller than a theoretical pitch for meshing with a given opposing mobile component, and a larger pitch which is larger than said theoretic pitch, the total of said smaller pitch and said larger pitch being equal to two times said theoretical pitch, and wherein each first flexible tooth is placed on a first flexible arm and each second flexible tooth is placed on a second flexible arm, said first flexible arm and said second flexible arm being attached to a hub of said backlash take-up wheel, wherein a first distance is measured on said pitch circle of the backlash take-up wheel between said first flexible tooth and said second tooth of the same said pair, and a second distance is measured on said pitch circle of the backlash take-up wheel between one first tooth and one second tooth of the backlash take-up wheel toothing which are adjacent but appertain to different consecutive pairs of the series of identical pairs of teeth, and wherein said first distance is different from said second distance.