Patent ID: 7604395

Claim:
An anchor escapement for a timepiece, including: a first escape wheel set driven by a first gear train; a balance roller carrying an impulse pin and a first impulse pallet stone arranged for cooperating with teeth of the first escape wheel set, and, an anchor piece articulated on a pivot and provided with a fork cooperating with the impulse pin of the balance; a second impulse pallet stone arranged for cooperating with the teeth of the first escape wheel set and with first and second locking pallet stones arranged to cooperate with the teeth of the first escape wheel set; a second escape wheel set driven by a second gear train, wherein the balance roller carries a third impulse pallet stone arranged for cooperating with teeth of the second escape wheel set, and, wherein the anchor piece is fitted with a fourth impulse pallet stone arranged for cooperating with the teeth of the second escape wheel set, and third and fourth locking pallet stones arranged for cooperating with the teeth of said second wheel set.