Patent ID: 7540654

Claim:
A tangential impulse escapement including a lever device hinged on a pivot, said lever device including as a first arm a lever ending in a fork for cooperating with an impulse pin of a roller and as a second arm, opposite to the first, a ring substantially surrounding an escapement wheel set, said ring being fitted with pallet locking pallet-stones and impulse pallet-stones for cooperating with the teeth of said wheel set, in order, alternately, to lock the latter and then impart to said roller an impulse, wherein the escapement wheel set includes a plurality of secured and coaxial wheels, including at least first and second wheels, the first wheel having a larger diameter than the second, the first and second wheels each cooperating with an impulse pallet-stone fitted to the ring, the locking pallet-stones being arranged for cooperating with any of the wheels of the escapement wheel set.