Abstract: The invention concerns a device for attaching a bracelet or strap to a watch case, the device comprising, on the one hand, a bar secured to the watch case by means of at least one horn, and on the other hand, an insert integral with the end of the bracelet, wherein the bar and the insert are complementary to cooperate by interlocking or fitting with each other to form removable assembly means able to make the bracelet interchangeable. According to the invention, the bar is formed by a cylindrical shaft having a flat portion, the flat portion being arranged to cooperate by interlocking or fitting with at least one housing made in the insert, the housing having a substantially rectangular opening for receiving the flat portion, the shaft being telescopic to move from a first position A, in which the insert is positionable on the shaft, to a second position B, in which the insert is locked on the shaft.

Abstract: A running equation of time mechanism includes civil hour and minute hands to indicate civil time and a concentric true minute hand to indicate true time. The running equation of time mechanism includes an equation of time cam and a differential gear device, a first input of which is formed by a civil minute pipe on which a civil minute hand is pressed, and a second input of which is formed by the equation of time cam. The differential gear device includes a planetary reducer wheel set via which the civil minute pipe drives a civil hour pipe on which is pressed the civil hour hand, and a planetary multiplier wheel set via which the civil hour pipe drives a true minute pipe on which is pressed the true minute hand.

Abstract: A running equation of time mechanism includes civil hour and minute hands to indicate civil time and a concentric true minute hand to indicate true time. The running equation of time mechanism includes an equation of time cam and a differential gear device, a first input of which is formed by a civil minute pipe on which a civil minute hand is pressed, and a second input of which is formed by the equation of time cam. The differential gear device includes a planetary reducer wheel set via which the civil minute pipe drives a civil hour pipe on which is pressed the civil hour hand, and a planetary multiplier wheel set via which the civil hour pipe drives a true minute pipe on which is pressed the true minute hand.

Abstract: The invention relates to a marine chronometer comprising a clock mounted on a support, for example mounted so that it can be inclined with respect to the support by means of a gimbal mounting, the clock comprising, inside a case, a mechanical clock movement driven by a barrel, the clock also comprising a rewinding control member engaged with a rewinding geartrain for rewinding the barrel. The chronometer according to the invention is wherein the rewinding control member comprises a rewinding control geartrain positioned on the outside of the clock, secured to a spindle passing through a wall of the case via a bearing, the said through-spindle being engaged with the barrel rewinding geartrain.

Abstract: The invention relates to a tool for actuating a push-button corrector equipping a portable object of small dimensions, said actuating tool comprising a body that extends between a rear end defining an area for grasping the actuating tool and a front end defining an area for actuating the actuating tool, the actuating tool further comprising an actuating rod arranged such that it slides in a coaxial manner inside the body, the actuating rod being capable of moving from back to front and from front to back between a retracted rest position wherein it is retracted in a stable manner inside the body of the actuating tool, and a protruding working position wherein it protrudes outside of the cap, the actuating rod remaining in the protruding working position thereof as long as an axial pushing force is exerted thereon, and returns to the retracted rest position thereof as soon as the axial pushing force is released.

Abstract: The invention relates to an actuating tool for actuating a push-button corrector equipping a portable object of small dimensions, wherein said actuating tool comprises a body that extends between a rear end that defines an area for grasping the actuating tool and a front end that defines an area for actuating the actuating tool, wherein the actuating tool further comprises an actuating rod that extends inwards relative to the body and that ends, towards the front end of the body, in an actuating portion, and the actuating tool finally comprises a guide sleeve that surrounds the actuating portion of the actuating tool and that is capable of moving between a first protruding position wherein the actuating portion is at most flush with the guide sleeve, and a second position wherein it is at least partially retracted inside the body, in which position the actuating portion is capable of actuating the push-button corrector.

Abstract: Watch movement including a frame comprising a first bearing and a second bearing, and a tourbillon comprising two cages, of which one cage is known as the external cage, the external cage being mounted in a pivoting manner on the frame between the first bearing and the second bearing, the movement comprising in addition two watch jewels supporting two pivots of the external cage, wherein the movement includes two translational elements capable of displacement in relation to the bearings in the axis of rotation of the external cage in the assembled position of the external cage on the frame, so as to cause a displacement of the watch jewels or a displacement of the pivots.

Abstract: A balance wheel including a rim connected to a hub with at least one arm, wherein the balance wheel includes an adjustable auxiliary temperature compensation system mounted in the space defined by the rim to allow adjustable temperature compensation of the balance wheel.

Abstract: 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.

Abstract: The timepiece mechanism comprises a rotating wheel set, a support element, a pivoting member mounted on the support element and magnetic return means for returning one portion of the pivoting member against a surface of the rotating wheel set. The return means comprise a first magnet carried by the pivoting member and a second magnet carried by the support element. The first and second magnets are arranged such that, in normal operation, the interaction of their respective magnetic fields generates a magnetic force oriented to return said pivoting member portion towards said rotating wheel surface. At least one of the first and second magnets is arranged to permit reversal of its polarity, preferably with the aid of a tool, and thereby of the direction of the magnetic force acting on the pivoting member, said magnetic force then tending to move said pivoting member portion away from said rotating wheel set surface, which makes it easy to handle the various elements of the timepiece mechanism.

Abstract: A one-piece arbor of a pivoting movable timepiece component, the one-piece arbor being made of one or more aligned parts. The one-piece arbor is magnetically inhomogeneous.

Abstract: The invention concerns a running equation of time mechanism including a hand arrangement whose purpose is to indicate civil time by means of an hour hand and a minute hand, and a true minute hand concentric with the civil minute hand, and which indicates the true solar minute, wherein the running equation of time mechanism also includes an equation of time cam having a profile which is determined by the difference, on each day of the year, between civil time, and true time, wherein this equation of time cam is driven in rotation by a calendar mechanism, wherein the position of the true minute hand is determined by the position of the equation of time cam, wherein the running equation of time mechanism also includes a differential gear device, a first input of which is formed by a civil minute pipe on which a civil minute hand is pressed, and a second input of which is formed by the equation of time cam, wherein the differential gear device includes a planetary reducer wheel set via which the civil minute pipe

Abstract: Timepiece display mechanism, for a watch, comprising a roller pivoting about a main axis and comprising flaps, each pivoting about a secondary axis parallel to the main axis and having two faces, first drive means for pivoting the roller about the main axis, and second drive means for pivoting a flap about its secondary axis, in a determined position of this secondary axis relative to the main axis, and which include, at each flap, a drive pinion cooperating with a control means to modify, in sequence or continuously, the position of the successive flaps of the same roller or to modify, on demand, the position of a specific flap.

Abstract: A timepiece sub-assembly including a mobile timepiece element including first and second annular and opposite peripheral surfaces of revolution about a same pivot axis, and a device for guiding pivoting about a theoretical axis of a timepiece mechanism. The first surface is magnetically or electrically charged, and the device includes at least three first surfaces regularly arranged around the theoretical axis, oppositely magnetically or respectively electrically charged to the first surface to repulse it at a first interface. In a watch, the second surface is magnetically or electrically charged, and the device includes at least three second surfaces regularly arranged around the theoretical axis, oppositely magnetically or electrically charged to the second surface to repulse it at a second interface.

Abstract: A bimetallic device, the difference in expansion coefficient of which is between 10 and 30 10?6 K?1, for providing a resonator with thermal compensation via the balance wheel.

Abstract: A balance wheel including a rim connected to a hub with at least one arm, wherein the balance wheel includes an adjustable auxiliary temperature compensation system mounted in the space defined by the rim to allow adjustable temperature compensation of the balance wheel.

Abstract: A shock absorber device for an arbor of a timepiece element including: a support including a base cup surmounted by a peripheral rim, which is delimited, opposite the cup, by an upper surface, the cup and the rim together defining a housing; a pivot system extending along an arbor, the pivot system being arranged in the housing and including a base including an elastic return mechanism at the periphery thereof, formed by at least one curved arm, including an opening in which is inserted a pivot element configured to cooperate with the arbor. The at least one curved arm is used for locking the pivot system in a bayonet fitting.

Abstract: The device for pivoting an arbor about a determined axis includes at least one magnetic bearing including a magnet which exerts a force of attraction on a pivot, made of magnetic material, of the arbor. Further, the bearing includes a magnetic flux centring structure arranged between the magnet and the pivot, and a support for the centring structure. This centring structure includes a peripheral portion and a central portion resiliently connected to the peripheral portion by at least one connecting element, the central portion being formed of a highly magnetically permeable material and having smaller dimensions than those of the magnet. The peripheral portion is rigidly force fitted to the support so that the central portion is centred on the pivot axis.

Abstract: The timepiece mechanism comprises a rotating wheel set, a support element, a pivoting member mounted on the support element and magnetic return means for returning one portion of the pivoting member against a surface of the rotating wheel set. The return means comprise a first magnet carried by the pivoting member and a second magnet carried by the support element. The first and second magnets are arranged such that, in normal operation, the interaction of their respective magnetic fields generates a magnetic force oriented to return said pivoting member portion towards said rotating wheel surface. At least one of the first and second magnets is arranged to permit reversal of its polarity, preferably with the aid of a tool, and thereby of the direction of the magnetic force acting on the pivoting member, said magnetic force then tending to move said pivoting member portion away from said rotating wheel set surface, which makes it easy to handle the various elements of the timepiece mechanism.

Abstract: 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.