Patent ID: 8641268

Claim:
A removable platform escapement assembly for a timepiece movement, including an oscillator or a sprung balance assembly, in turn comprising at least one balance spring and at least one balance fitted with a roller, and an escape wheel controlled by a pallet lever, arranged to cooperate with said roller, wherein said platform escapement assembly includes an escapement bridge, which comprises, on both sides of a bottom surface fitted with guide bearings, first and second spacers respectively comprising first and second bearing surfaces for receiving first and second complementary surfaces comprised in a balance cock on both sides of a top surface fitted with guide bearings, and wherein said balance cock is positioned relative to said escapement bridge by first and second positioning means, respectively arranged on said first and second bearing surfaces, and said top surface of said balance cock is more flexible in bending than said bottom surface of said escapement bridge, so as to allow mobility, as a result of a force applied at least perpendicularly to said top surface, of said first complementary surface relative to said first bearing surface when said second complementary surface is held locked in position on said second bearing surface, or vice versa; wherein said bottom surface is fitted with a balance spring stud for securing said at least one balance spring, a bottom balance bearing for guiding a bottom balance pivot of said balance, a bottom pallet lever bearing for guiding a bottom pallet lever pivot of said pallet lever, and a bottom escapement bearing for guiding a bottom escapement pivot of said escape wheel, and wherein said top surface is provided with a top balance bearing for guiding a top balance pivot of said balance, a top pallet lever bearing for guiding a top pallet lever pivot of said pallet lever and a top escapement bearing for guiding a top escapement pivot of said escape wheel.