Escapement anchor for watch movement, has input and output arms respectively provided with input and output pallets including impulse jaws possessing convex radius of curvatures equal to or greater than seven micrometers

摘要

The anchor has an input arm (10) provided with an input pallet (11) including an impulse jaw (11c) located between an impulse plane (11a) and a rear (11b) of the input pallet, where the jaw possesses a convex radius of curvature. An output arm (12) is provided with an output pallet (13) including an impulse jaw (13c) located between an impulse plane (13a) and a rear (13b) of the output pallet, where the impulse jaw of the output pallet possesses a convex radius of curvature. The radius of curvature of the impulse jaw of the input and/or output pallets is equal to or greater than 7 micrometers. The anchor is formed from a single piece of material such as silicon, diamond, glass, plastic and ruby or sapphire.