Patent ID: 7607822

Claim:
A detent escapement for a timepiece including first and second escape wheels each driven by independent gear trains and barrels and a balance on the pivot of which is there is secured a roller, the axis of rotation of said pivot being located substantially equidistant from the axes of rotation of the first and second wheels, said roller carrying an impulse pin arranged for cooperating with a brake lever articulated on a pivot, and carrying first and second impulse pallet stones arranged for cooperating respectively with the first and second wheels, wherein the brake lever carries first and second locking pallet stones arranged for cooperating respectively with the first and second wheels, said brake lever having a stick the end of which cooperates with the impulse pin of the roller, the stick having an axis intersecting both the axis of the pivot of the roller and the axis of the pivot of the brake lever when the first and second wheels are locked on the first and second locking pallet stones, said brake lever also having means for re-engaging the first and second locking pallet stones respectively in the first and second escape wheels.