Patent ID: 7192180
Filing Date: 2007-03-20
Classification: G04B

Abstract:
1. A detent escapement for a timepiece including an escapement wheel fitted with teeth, a balance, on the pin of which are fixed a large roller fitted with an impulse pallet-stone and a first actuating finger and a small roller on the circular periphery of which there is made a notch, and a blocking member in the form of a lever hinged on a pin, said blocking member carrying a locking device of the escapement wheel and a second actuating finger, wherein said first and second fingers are shaped such that when the large and small rollers rotate in a first direction, the first finger drives the second finger which moves around a first side of said first finger to release the device locking the escapement wheel, the second finger being then driven by a rising flank of the notch of the small roller to re-engage the locking device in the escapement wheel, and such that when the large and small rollers rotate in a second direction opposite to the first, the first finger drives the second finger which moves around a second side, opposite to the first side, of said first finger to keep the locking device engaged in the escapement wheel.