Patent ID: 7708455

Claim:
An escapement for a timepiece, including: (i) an escape wheel set having teeth and driven by a gear train; (ii) a balance associated with a balance spring; (iii) means using the energy developed by the wheel set for periodically launching the balance, including first and second impulse pallet stones secured to the balance and cooperating directly with the teeth of the wheel set; and (iv) means for temporarily locking said wheel set after each launch of said balance, including a brake lever driven periodically by the balance, said brake lever being provided with first and second locking pallet stones arranged for cooperating with said teeth of said wheel set, wherein the wheel set includes a plurality of coaxial wheels secured to each other, including at least first and second wheels, the first having a larger diameter than the second, the first and second wheels respectively cooperating with the first and second impulse pallet stones, the first and second locking pallet stones being arranged for cooperating with any of the wheels of the wheel set.