Abstract: A tourbillon is disclosed which presents a carriage comprising an upper bridge 1, a lower bridge 2 and an escapement bridge 3 supporting a balance spring 4, an escapement wheel 5 and a pallet assembly 6, the lower bridge 2 presenting a circular periphery designed to fit into a groove on the outer edge of three pivoting rollers positioned between a plate and bridges of a corresponding timepiece.

Abstract: The invention relates to a chronograph mechanism comprising at least one minutes counter and one hours counter which are designed to be located both on the same side of the plate, first and second resetting members, each having a bearing surface and being able to pivot between a low position, in which each bearing surface cooperates with the periphery of a resetting cam of one of the counters, and a high position, in which each bearing surface is located at a distance from the corresponding cam. The mechanism comprises retaining means for keeping each of the resetting members in its high position, comprising a first retaining member acting directly on a first resetting member and able to be released in response to an action by a user, and a second retaining member acting directly on the second resetting member and able to be released in response to a pivoting of the first resetting member in the direction of its low position.

Abstract: The invention relates to a chronograph mechanism comprising at least one minutes counter and one hours counter which are designed to be located both on the same side of the plate, first and second resetting members, each having a bearing surface and being able to pivot between a low position, in which each bearing surface cooperates with the periphery of a resetting cam of one of the counters, and a high position, in which each bearing surface is located at a distance from the corresponding cam. The mechanism comprises retaining means for keeping each of the resetting members in its high position, comprising a first retaining member acting directly on a first resetting member and able to be released in response to an action by a user, and a second retaining member acting directly on the second resetting member and able to be released in response to a pivoting of the first resetting member in the direction of its low position.

Abstract: A description is given of a watch movement of the fly-back chronograph type comprising a frame carrying connected a finishing gear train capable of being train kinematically to a chronograph gear train comprising at least one chronograph runner having a chronograph spindle intended to carry a first member for displaying seconds. The movement comprises a fly-back runner coaxial with the chronograph runner and having a fly-back spindle intended to carry a second member for displaying seconds. The fly-back spindle is hollow and passed through by the chronograph spindle, the fly-back runner being mounted rotationally with reference to the frame by means of a bearing. Among other advantages, this construction makes it possible to isolate the chronograph runner from the fly-back runner.

Abstract: The present disclosure describes a toothed wheel for a gear system of a clock movement, comprising a plate provided with a toothing on its periphery, said toothing comprising a plurality of teeth, each of which has a dedendum extending from said plate and in the continuation of which an addendum is formed. Each of the teeth of the wheel is designed in such a way that its dedendum has a width smaller than that of its addendum and, preferably, a length equal to or greater than that of the addendum. It is moreover provided that the addendum has a tip located on a radius (R) of the plate and from which there extend, on both sides of the radius, a first portion, which is substantially rectilinear, to a distance from said radius which is greater than half the width of the dedendum, then a second portion, which is concave, joining the first portion to the dedendum.

Abstract: Fuze including safety element (30) includes an acceleration detector (31) that acts on a timer (32) coacting with a primer housing rotor (14). Rotation of the rotor can be halted by a second safety device (35) responsive to the dynamic pressure generated by the speed of the projectile (11) in flight. For this purpose, the device includes a diaphragm (36) engaging a flexible blade (51) to space apart the end (55) of the blade and the rotor when the dynamic pressure has a predetermined value, whereby a primer (18) can be moved into line in the explosive train. When the dynamic pressure is too low, the end (55) stops the rotor (14) from rotating and the firing procedure is also blocked in a notch in the rotor (14). The resulting fuze thus has highly reliable dual safety element responsive to two separate physical phenomena and having a simple construction.

Abstract: A tourbillon is disclosed which presents a carriage comprising an upper bridge 1, a lower bridge 2 and an escapement bridge 3 supporting a balance spring 4, an escapement wheel 5 and a pallet assembly 6, the lower bridge 2 presenting a circular periphery designed to fit into a groove on the outer edge of three pivoting rollers positioned between a plate and bridges of a corresponding timepiece.

Abstract: The tri-axial tourbillon comprises a cage (A) containing the balance (1), the escape wheel (2) and the escape pinion (3) rotating around an axis (A1) and mounted in a second cage (B) rotating around an axis (A2), the cage (B) in turn being mounted rotably in a third cage (C) rotating around an axis (A3) that is fixed relative to the timepiece, the three axes (A1, A2, A3) being perpendicular to each other.

Abstract: Fuze including safety element (30) includes an acceleration detector (31) that acts on a timer (32) coacting with a primer housing rotor (14). Rotation of the rotor can be halted by a second safety device (35) responsive to the dynamic pressure generated by the speed of the projectile (11) in flight. For this purpose, the device includes a diaphragm (36) engaging a flexible blade (51) to space apart the end (55) of the blade and the rotor when the dynamic pressure has a predetermined value, whereby a primer (18) can be moved into line in the explosive train. When the dynamic pressure is too low, the end (55) stops the rotor (14) from rotating and the firing procedure is also blocked in a notch in the rotor (14). The resulting fuze thus has highly reliable dual safety element responsive to two separate physical phenomena and having a simple construction.

Abstract: The tri-axial tourbillon comprises a cage (A) containing the balance (1), the escape wheel (2) and the escape pinion (3) rotating around an axis (A1) and mounted in a second cage (B) rotating around an axis (A2), the cage (B) in turn being mounted rotably in a third cage (C) rotating around an axis (A3) that is fixed relative to the timepiece, the three axes (A1, A2, A3) being perpendicular to each other.

Abstract: The invention concerns an ironing press including a base bearing an ironing plate, a sleeve board and an articulated arm for manoeuvring a heating plate, movable between two positions. In one position, the heating plate is pressed against the ironing plate or the sleeve board. The ironing plate and the sleeve board are mounted on the base so as to enable their alternating displacement from a working position to a retracted position. The ironing plate and the sleeve board are each articulated to the base and are interconnected by a linking member providing a kinematic linkage between them.

Abstract: The fuse comprises an electric generator (2) consisting of a magnetic core (3) able to move in a winding (4) at the moment of the firing of the shot to provide a pulse for charging the condenser (C) intended to ignite the primer (6). In order to improve the resistance to shocks other than that of the firing of the shot, the displacement of core (3) can only take place after perforation of a small metal plate (17) by one end (16) of a rod, the other end (20) of which must be stricken by a mass (23) moving against the action of a spring (20) at the firing of the shot.

Abstract: A fuse comprises a firing pin provided with a tip eccentric with respect to the longitudinal axis of the firing pin. By turning the firing pin by means of a cap in which it is mounted, the tip can be placed to face one or the other of two firing caps having different firing characteristics.

Abstract: A fuse comprises a cap carrying a rotor mounted in a rotatable fashion on a body with the help of a shaft and rotatable from an inactive position to an active position. A timer with an escapement permits the braking of the rotation of the rotor and has a multiplying gear carried by two frames and cooperating with a timing balance. The rotor is an integral part of a toothed sector meshing with the timer. The frames are mounted in a pivoting fashion on bearings of a shaft, which permits the angular displacement of the timer around this shaft to allow for the adjustment of the angular distance of meshing of the toothed sector with the timer and, therefore, the duration of passage from the safety position of the rotor to the armed position.

Abstract: The projectile fuse comprises a piezoelectric generator located forward of a piercing part (2) and formed by a striker (5), a hammer (6) and a crystal (8). The firing device comprises a watch movement (11) providing a muzzle safety and making possible the positioning of a rotary support (15) for at least one primer (24). A part (2) of material with high mechanical resistance acts as the piercing head for the projectile after the dislodging of the electric generator at the moment of impact and effectively protects the watch movement (11) and the rotary support (15).

Abstract: The fuze comprises a primer-carrying rotor and an inertia mass tensioning a spring under the effect of the acceleration at the start of the explosion. The inertia mass entrains the rotor at the outlet of the firing muzzle in the armed position, under the action of the spring against the retarding action of an anchor rod. The fuze comprises a reduced number of components permitting ensuring successively detonator safety, muzzle safety and a substantial trajectory safety.