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.

Regulating body for a wristwatch, comprising: a generator provided with a rotor and a stator with M+N coils, M being a whole number higher than, or equal to, 1; and an electronic regulating circuit having a first load impedance with an adjustable value for adjusting the current in N of said M+N coils, and therefore the rotational speed of the rotor. Only a limited number of coils is therefore used for the braking, the other coils continuing to supply the electronic regulating circuit.

Timepiece regulating mechanism including an energy storage means delivering an output torque (CS), via a train (3), to a wheel set (4) forming a magnetic escapement mechanism (10) with a resonator wheel set (5) subjected to the torque from a return means (6) and cooperating therewith, either directly or via a magnetic stop member (7), this magnetic escapement mechanism (10) being arranged to operate when the wheel set (4) receives a torque higher than or equal to a maintenance torque (CE), and the train (3) includes a torque regulating means (30) arranged to deliver to the wheel set (4) a constant torque comprised between 1.0 and 2.0 times the maintenance torque (CE), the torque regulating means (30) including a fusee (8) of continuously variable cross-section, from which unwinds a chain (9), wound by a drum (21), directly or indirectly driven by the energy storage means (2).

A mechanical timepiece includes: a hairspring; a permanent magnet; a soft magnetic core; a control circuit for performing rate adjustment based on a counter-electromotive voltage caused in a coil by a motion of the permanent magnet accompanying a forward direction motion and a reverse direction motion of the balance wheel. The permanent magnet is arranged so that, under a state in which the hairspring is brought to an equilibrium length, a direction of magnetization is directed to the first end portion side or the second end portion side.

Timepiece regulating mechanism including an energy storage means delivering an output torque (CS), via a train (3), to a wheel set (4) forming a magnetic escapement mechanism (10) with a resonator wheel set (5) subjected to the torque from a return means (6) and cooperating therewith, either directly or via a magnetic stop member (7), this magnetic escapement mechanism (10) being arranged to operate when the wheel set (4) receives a torque higher than or equal to a maintenance torque (CE), and the train (3) includes a torque regulating means (30) arranged to deliver to the wheel set (4) a constant torque comprised between 1.0 and 2.0 times the maintenance torque (CE), the torque regulating means (30) including a fusee (8) of continuously variable cross-section, from which unwinds a chain (9), wound by a drum (21), directly or indirectly driven by the energy storage means (2).

A mechanical watch includes a balance, an oscillation circuit configured to output a clock signal, a vibration detection unit configured to detect a vibration of the balance and output a vibration detection signal, a speed governing unit including a permanent magnet and a coil, a speed governing control unit, a storage unit configured to store an electrical energy, and a generator. One of the permanent magnet and the coil is held by the balance. The speed governing control unit compares the clock signal and the vibration detection signal and performs the speed governing control of the balance by exerting an electromagnetic force on the permanent magnet, the electromagnetic force being generated by outputting a current to the coil. When a stored energy amount is equal to or smaller than a predetermined value, the speed governing control unit switches a state to a stop state where the speed governing control of the balance is stopped.

A method for orienting a timepiece component including ferromagnetic material, where, on both ends of this component, two magnetic fields each attract it onto a pole piece, with an unbalance in the intensity of these fields around this component, in order to create a differential in the forces thereon and to press one of these ends onto a contact surface of one of the pole pieces, and to hold the other end at a distance from the other pole piece. A magnetic pivot includes such a component with two ends. It includes a guide device with surfaces of two pole pieces each generating a magnetic field attracting one of these ends, the magnetic forces exerted on the two ends being of different intensity, in order to attract only one end into contact with only one of these pole piece surfaces.

A wearable object (42) including an electronic unit and a power supply unit formed by an electromechanical converter (6A) which includes a rotor (44) carrying first magnets (10A), a mechanical resonator (12A) provided with an inertia mass (46) capable of oscillating at a relatively high resonant frequency and carrying second magnets (20), and coils arranged so that, when the mechanical resonator is oscillating, an induced voltage is generated in these coils. The electromechanical converter is arranged so that the first magnets and the second magnets can, during a rotational drive of the rotor, interact magnetically so as to apply to the inertia mass, momentarily or temporarily, a magnetic force torque allowing to excite the mechanical resonator, in order to generate at least one oscillation of this mechanical resonator at its resonant frequency in order to generate a relatively high induced voltage allowing to recharge an accumulator.

Provided is a mechanical timepiece in which rotation is maintained even when a torque caused by a spring force of a hairspring is decreased. The mechanical timepiece includes a power spring, a balance wheel, a hairspring, a permanent magnet, a coil, a soft magnetic core, and rate adjustment means. The permanent magnet is arranged so that, at a position of 0, an S-pole portion is opposed to a first end portion with a first interval and an N-pole portion is opposed to a second end portion with a second interval, and, at a position of 180, the S-pole portion is opposed to the second end portion with a third interval and the N-pole portion is opposed to the first end portion with a fourth interval.

A mechanical timepiece includes: a hairspring; a permanent magnet; a soft magnetic core; a control circuit for performing rate adjustment based on a counter-electromotive voltage caused in a coil by a motion of the permanent magnet accompanying a forward direction motion and a reverse direction motion of the balance wheel. The permanent magnet is arranged so that, under a state in which the hairspring is brought to an equilibrium length, a direction of magnetization is directed to the first end portion side or the second end portion side.