Escapement mechanism with locking anchor and timepiece provided with such an escapement mechanism

A timepiece, comprising:

• a watch movement equipped with a mechanical driving source,
• a finishing gear train,
• a regulating organ, and
• an escapement mechanism having
• an escapement wheel rotatable about a first axis of rotation and having a series of peripheral teeth, and
• a locking anchor rotatable about a second axis of rotation parallel to the first axis of rotation, said locking anchor comprising first and second locking pallets arranged respectively at one end of first and second arms and arranged for alternately engaging a tooth of the escapement wheel at each rotation step of the escapement wheel and of the locking anchor about their respective axis of rotation,
• wherein the escapement mechanism comprises at least one impulse pallet adapted to be fixed to one said regulating organ to transmit an impulse by sliding the tooth of the escapement wheel on an impulse plane of said impulse pallet once at least every two alternations of said regulating organ,
• wherein the locking anchor comprises a connecting member for permanent kinematic engagement in rotation to said regulating organ so as to provide a lever arm between the axis of rotation of the regulating organ and the escapement wheel,
• the escapement mechanism arranged in kinematic engagement by the escapement wheel to a wheel of the finishing gear train and by the connecting member providing the permanent connection of the locking anchor to said regulating organ, the at least one said impulse pallet of the escapement mechanism being furthermore fixed to said regulating organ so as to periodically receive a share of mechanical energy from the driving source per dragging impulse of the tooth of the escapement wheel on the impulse plane of the impulse pallet.