A timepiece is provided with a mechanical movement which includes a mechanical resonator, a sensor detecting oscillations of the mechanical resonator, and a braking device arranged to generate braking pulses in response to a control signal provided by a control circuit associated with an auxiliary oscillator. The control circuit is arranged to be capable of detecting a negative or positive temporal drift in the oscillation of the mechanical resonator and to generate, in a correction period, in association with the braking device, when the temporal drift corresponds to at least a certain loss, a series of braking pulses which are applied to the mechanical resonator at a frequency FSUP in a given range of values which is preferably higher than a frequency FZ (N)=2.Math.F0c/N, F0c being a set point frequency for the mechanical resonator and N a positive integer number.

A flexible guide for a rotating resonator mechanism, in particular of a horological movement, the guide including a fixed support, an element that is capable of moving relative to the fixed support, at least one main flexible blade allowing the movable element to move relative to the fixed support by bending the one or more main flexible blades via a rotary motion about a centre of rotation, the flexible guide being arranged substantially in one plane, and includes at least one translation table joined to one end of the main flexible blade, the main flexible blade and the translation table forming a pair connected to the fixed support, to the movable element, or to an intermediate movable part, such that the translation table is configured to move in translation at least in part under the effect of the bending of the main flexible blade.

A flexible guide for a rotary resonator mechanism, in particular of a horological movement, the guide including a fixed support, an element movable relative to the fixed support, at least one main flexible strip allowing the movable element to move relative to the fixed support by bending the main flexible strip(s) in a rotary movement about a centre of rotation, the flexible guide being arranged substantially in a plane, and includes at least a first translation table joined to one end of the main flexible strip, so that the first translation table is configured to move in translation at least in part under the effect of the bending of the main flexible strip, the flexible guide including a device for adjusting the rigidity of the first translation table.

A balance of a timepiece including an adjustment face provided with at least one recess provided for receiving a projected material for an implementation of an adjustment of the rate of the timepiece notably by the modification of the inertia and of the unbalance of the balance, the recess including an opening and a back notably a solid back or a back fully or partially forming an orifice, the back being at most partially visible from a position defined above the opening notably on a central axis of the opening.

A process for producing a metal alloy balance wheel by molding, the process including the following steps: a) making a mold in the negative shape of the balance wheel, b) getting hold of a metal alloy that has a thermal expansion coefficient of less than 25 ppm/° C. and is able to be in an at least partly amorphous state when it is heated to a temperature between its glass transition temperature and its crystallization temperature, c) putting the metal alloy into the mold, the metal alloy being heated to a temperature between its glass transition temperature and its crystallization temperature so as to be hot-molded and to form a balance wheel, d) cooling the metal alloy to obtain a balance wheel made of the metal alloy, e) releasing the balance wheel obtained in step d) from its mold.

A balance includes a balance staff rotatably supported by a main plate, a collet fixed to the balance staff, and a hairspring fixed to the collet, the hairspring including a Grossmann curve disposed at a side of the collet and an Archimedes curve coupled to the Grossmann curve, and an impact-resistant member configured to suppress displacement of a shape of the Grossmann curve at least at the side of the collet.

A one-piece silicon device with flexible blades (2, 3), in particular for timepieces, for example a pivot with crossed blades, and to a method for manufacturing the device (1). The method includes: forming (21) a one-piece silicon device (1) blank from a wafer of the SOI type, the device (1) including two flexible blades (2, 3), each formed in a different layer of the SOI wafer, the blades (2, 3) being arranged in two different substantially parallel planes, the blades (2, 3) being separated by a clearance (7); growing a first silicon oxide layer on the surface of at least one of the blades (2, 3) bordering the clearance, the first silicon oxide layer being formed from a first sub-layer of silicon of the one or more blades (2, 3); and removing the first silicon oxide layer to increase the clearance (7) between the two blades (2, 3).

An inertial mass with adjustment of inertia and/or unbalance for a horological resonator, including a plurality of mobiles for adjusting inertia and/or unbalance, toothed or fluted, each mounted pivotably about a mobile axis with respect to a flange that the inertial mass includes, and with a centre of mass off-centre with respect to this mobile axis, each mobile cooperating by meshing with an inertia and/or unbalance adjustment crown, toothed or fluted, under a permanent constraint exerted by an elastic return force exerted by the crown and/or the mobile.

The resonator for a timepiece includes a support structure permitting mounting the resonator in a timepiece, a first and a second balance arranged to oscillate in the same plane, at least one first and second elastic element respectively connecting the first and second balances to the support structure, the configuration of the elastic elements determining two parallel elastic pivoting axes for the two balances, and the elastic elements forming a resilient element angularly returning each of the balances towards an inoperative position. The resonator further includes a strap coupling the first and the second balance. The points joining the strap to the first and the second balance respectively are located in the same plane parallel to the plane of oscillation of the balances. When the balances are in their inoperative position, these joining points are symmetrical with respect to a center of symmetry midway between the geometrical pivoting axes.

A sprung balance type mechanical timekeeper, includes a spiral spring (10), a balance (20) and an escapement mechanism (30) connected by a point of attachment (12) to the spiral spring and arranged to sustain an oscillation of the balance. The escapement mechanism (30) is connected to the point of attachment (12) of the spiral spring by a chassis (40) pivoted about the axis (A) of the balance. An outer end (12) of the spiral spring (10) is attached to this transverse pert (40) at a location located on one side of the balance axis (A). The chassis (40) includes two branches extending on either side of the axis of the balance (20) and forming a rotary plate whose axis of rotation is coincident with the axis of oscillation of the balance (20). The escapement mechanism (30) is located on the other side of the balance axis (A) and acts on the pivoted chassis (40) so as to free its rotation and thus make the attached end (12) of the spiral spring rotate.