Patent ID: 8696194
Filing Date: 2014-04-15
Classification: G04B

Abstract:
1. A detent escapement for a timepiece comprising: an escape wheel; a balance having an impulse pallet which can contact a wheel tooth of the escape wheel and an unlocking stone; and a blade having locking stone which can contact the wheel tooth of the escape wheel, wherein the blade includes a locking stone support arm which supports the locking stone, a one side actuating spring which includes a portion capable of contacting the unlocking stone, and a one side actuating spring support arm that supports a base portion of the one side actuating spring and that determines a position of an unlocking stone contact portion which is positioned at a tip of the one side actuating spring, wherein the blade is configured so as to be rotated in two directions which include a direction in which the locking stone approaches the escape wheel and a direction in which the locking stone is separated from the escape wheel, wherein the one side actuating spring is configured and arranged such that the base portion thereof is disposed completely on the side opposite to the side of the escape wheel with respect to a reference line connecting a rotation center of the balance and a rotation center of the blade, and wherein the one side actuating spring is disposed between the locking stone support arm and the one side actuating spring support arm.