Single-piece lever for Swiss lever escapement of mechanical timepiece, has stop pallets arranged in projection with respect to arms in common plane and comprising ends having convex portions defining points of contact with escapement wheel

摘要

The lever (10) has a bar (12) whose free end is equipped with a fork (14) cooperating with a balance (17), where the lever is made of single crystal silicon material. The bar is prolonged, from a side opposite the fork, by two arms (20). Each arm comprises a stop pallet (26) that is distinct from a rest and impulse pallet (22) of the arm and is arranged in projection with respect to the arm in a common plane defined by the bar. One end of the stop pallet is equipped with a convex portion defining point of contact with an escapement wheel (24). An independent claim is also included for an escapement comprising a lever.