Abstract: The going train for a timepiece has a mechanical movement having a frame (0), a barrel (1) and an escapement pinion (5) which are connected by the going train. This going train has a stepping-up epicyclic train having a first planet gear (6) with a constant rotational speed during normal operation of the movement, a second planet gear (7) kinematically connected to the escapement pinion (5), at least one satellite gear (9) each meshing with the first planet gear (6) and the second planet gear (7), and a satellite carrier (8) kinematically connected to the barrel (1) and carrying the satellite gear(s) (9).
Abstract: A timepiece movement includes an escapement mobile connected to a barrel by a going train and a spring balance as well as an escapement mechanism (1) including an impulse lever (8) and at least one regulating member (9). The impulse lever (8) and the regulating member (9), which co-operate with the escapement mobile, are controlled by control members (6.1, 6.2, 7.1) supported on the axle of the balance. Between positions in which they co-operate with the escapement mobile (1) and positions in which they do not co-operate with the escapement mobile, the impulse lever (8) and the regulating member (9) move in two different planes forming an angle therebetween.
Abstract: The constant force escapement mechanism in particular for a timepiece movement including a spring balance and an escapement gear connected to a barrel by a going train includes a constant force auxiliary spring (11). It includes an impulsion lever (8) co-operating on the one hand with the escapement gear (1) and on the other hand with control members fixed to the arbor of the spring balance. The constant force auxiliary spring (11) is fixed at one of its ends on a part of the frame of the movement and at its other end to the impulsion lever (8).