A stud includes a support portion formed into a shape of a column, and a spring receiving portion being provided on the support portion and including a slit portion to which a hairspring is to be inserted and fixed. The spring receiving portion is formed into a truncated conical shape centered on a center line that passes through the center of the column. The groove that forms a constricted portion on an outer periphery is provided between the support portion and the spring receiving portion. The slit portion is a notch portion that is formed from an upper surface toward a bottom surface of the spring receiving portion in the truncated conical shape, and thrusts into a portion of the groove.

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.

Disclosed is a tourbillon for a horology movement including a cage rotatably mounted on the horology movement, the cage bearing a regulating organ including a balance including a balance pivot pivotally mounted in balance bearings about a balance axis with an anchor including an anchor pivot pivotally mounted in anchor bearings about an anchor axis and arranged to cooperate both with the regulating organ and also with an escapement wheel including an escapement pivot pivotally mounted in escapement bearings about an escapement axis. The anchor and the escapement wheel are positioned relative to the balance so the distance between the anchor axis and the balance axis and the distance between the escapement axis and the balance axis are greater than the outer radius of the balance. Also disclosed is a movement including such a tourbillon as well as to a timepiece including such a movement.

A regulating member (1) for a horological movement, including an inertial mass, for example a balance (23), a balance spring (25) including a wound ribbon (2) and an adjustor for adjusting the stiffness of the balance spring provided with a flexible element (5) arranged in series with the wound ribbon (2), the adjustor including a prestressing device (6) for applying a variable force or torque to the flexible element (5) in order to adjust the rate of the regulating member (1), the regulating member (1) including a system for actuating the prestressing device (6), the actuation system including an actuator (30) mechanically connected to the prestressing device (6), the actuator (30) being configured to perform, at least in part, a substantially linear, preferably rectilinear, displacement, in order to actuate the prestressing device.

An assembly for the removable attachment of a balance spring of a horological movement including a balance bridge, the assembly including the balance spring, a means of retaining the balance spring, and a removable locking part. The balance spring includes a coil winding which extends between a first free end of an inner first coil and a second free end of an outer last coil, the second free end including an attachment means in which the retaining means is engaged to ensure the removable attachment of the balance spring by its outer last coil. The attachment means is dimensioned so that, in a rest position, the balance spring is not in contact with the retaining means engaged in this attachment means, the locking part for the removable attachment of the second free end being engaged on the retaining means to lock the attachment means.

A microsystem for setting the rate of a timepiece oscillator, including a wheel/inertia block including an off-center unbalance and a toothing and arranged to pivot with respect to a base plate of the microsystem, which includes an actuator driving a first active click arranged to drive the toothing, and includes a device for stopping the toothing in position, wherein the actuator is a thermomechanical actuator arranged to convert a flow of light energy into a displacement of a distal end of the thermomechanical actuator, which carries a first active click or directly controls a movement of a first active click, and the microsystem is capable of incorporation in a watch including a crystal transparent to predetermined wavelengths ranges and allowing the passage of a light ray to regulate the microsystem.

A balance spring intended to be fitted to a timepiece balance having fixed inertia, the balance spring being formed of a core having lateral faces connecting an upper face to a lower face, the balance spring including on one of the lateral faces in one portion of the outer coil, a coating formed of one or more layers, the coating including two layers with a first electrically conductive layer coated with a second outer layer made of a ceramic, or a combined layer, made of an electrically conductive ceramic. Also a method of manufacturing this balance spring.

The invention relates to a timepiece assortment including a timepiece component fixed to an arbor with the aid of a fixing element. According to the invention, the fixing element is made of at least partially amorphous metal alloy, is secured to the timepiece component by partial insertion and includes a hole into which the arbor is driven.

The invention relates to a timepiece assortment including a timepiece component fixed to an arbor with the aid of a fixing element. According to the invention, the fixing element is made of at least partially amorphous metal alloy, is secured to the timepiece component by partial insertion and includes a hole into which the arbor is driven.

Timepiece movement or watch including one isochronous oscillator mechanism, including only a first sprung balance oscillator including a first balance spring attached to a fixed structure at a first stud and to a first mobile component pivoting about a first axis, and a second sprung balance oscillator including a second balance spring fixed to a second mobile component, coupled to each other by mechanical connection via this second elastic return means attached to the first mobile component, this second balance spring being attached, to a felloe or an arm of the first mobile component at a second stud, and to this second mobile component which pivots about a second axis, and the maintenance of the oscillations is effected on only one of first mobile component or second mobile component.