US 7,553,068 B2
	Lever escapement for a timepiece
Andrés Cabezas Jurin, Yverdon-les-Bains (Switzerland); and Thierry Conus, Lengnau (Switzerland)
Assigned to ETA SA Manufacture Horlogère Suisse, Grenchen (Switzerland)
Filed on Apr. 18, 2008, as Appl. No. 12/105,492.
Claims priority of application No. 07106375 (EP), filed on Apr. 18, 2007.
Prior Publication US 2008/0259739 A1, Oct. 23, 2008
Int. Cl. G04B 15/00 (2006.01)

U.S. Cl. 368—132  [368/124; 368/129]

9 Claims

1. A lever escapement for a timepiece including an escape wheel set fitted with at least one wheel, a balance roller carrying an impulse pin and a pallet assembly arranged for cooperating with the impulse pin, said pallet assembly being fitted with first and second locking pallet stones and an impulse pallet stone, said pallet stones being arranged for cooperating with the teeth of the escape wheel, wherein the pallet assembly drives an auxiliary wheel set carrying a second impulse pallet stone arranged for cooperating with the teeth of said escape wheel, and wherein said auxiliary wheel set is not coaxial to said balance roller.