Patent ID: 8579498

Claim:
A mechanical device for pacing a rotary motion of a rotating toothed member, particularly suitable for applications in the horology field and the like, comprising: a balance wheel adapted to move with an oscillatory motion; a lever tilting about a first axis of rotation and comprising engagement means adapted to cooperate with said rotating member; a rod adapted to oscillate about a second axis of rotation when moved by said balance wheel and articulation means adapted to connect said rod to said lever so as to cause corresponding oscillations thereof, performing an angular reduction ratio between the oscillations of said rod and the oscillations of said lever; wherein said articulation means comprises: a mechanical joint with a rotary articulation adapted to allow relative rototranslation between said lever and said rod; a cam which is mounted, integrally to said rod and eccentrically with respect to the second axis of rotation; and a yoke, which embraces said cam, adapted to guarantee cylindrical articulation between said tilting lever and said rod; such that said rotary articulation being carried out through mutual motion between said yoke located at one end of said lever and said cam cooperating with said yoke.