Patent ID: 7527425

Claim:
A device for fixing a pallet-stone on an escapement anchor comprising: at least one seat provided to receive the pallet-stone, said seat having a longitudinal axis, wherein a portion of the anchor comprising the seat comprises a shape memory alloy adapted to undergo a reversible transformation from an austenitic crystallographic phase into a martensitic crystallographic phase, wherein the seat is bounded by jaws configured to re-close in a direction of the seat, wherein a first jaw is fixed and a second jaw is movable between a first unclamped position in which the pallet-stone may be introduced into the seat and be shifted therein along said longitudinal axis, and a second clamped position in which the jaws clamp the pallet-stone fixedly and immobilize the pallet-stone in the seat and wherein the first jaw has two flat clamping surfaces in alignment and separated by a recess, and wherein the second jaw has a clamping surface disposed essentially parallel to facing the two clamping surfaces of the first jaw in the clamped position.