Abstract: A transmission horological mechanism is disclosed, which includes: a transmission wheel including a driving plate, intended to pivot about a first axis of rotation in response to the movements of a driving wheel; and a link organ having a flexible portion and bearing a unidirectional transmission organ arranged to cooperate with an output wheel intended to drive a driven wheel when the driving wheel is displaced in a first direction of displacement. The link organ includes: a base secured to the driving plate and arranged to exhibit a rotational movement about the first fixed axis of rotation, in response to the movements of the driving wheel; and a first arm extending from the base and bearing the unidirectional transmission organ at its distal end, the flexible portion being arranged on the first arm.

Abstract: A mechanism for adjusting an average speed in a timepiece movement comprises an escapement wheel and a mechanical oscillator, in which a plurality of blades, which are resiliently flexible in an oscillation plane, support and return a balance in such a way that this balance oscillates at an angle in the oscillation plane. A pallet fork comprises two rigid pallets which are rigidly connected to the balance and are arranged to co-operate alternately with a toothing of the escapement wheel when the balance oscillates at an angle.