摘要:
The invention concerns a device for regulating the relative angular speed between a magnetic structure and a resonator magnetically coupled to each other and forming an oscillator which defines a magnetic escapement. The magnetic structure includes at least one annular magnetic path at least partially formed of a magnetic material and the resonator includes at least one element for magnetic coupling to the annular magnetic path, this coupling element being formed of a magnetic material having a physical parameter correlated to the magnetic potential energy of the oscillator. The radial dimension of the annular magnetic path is smaller than a corresponding dimension of the coupling element, and the magnetic material is arranged so that the physical parameter of said magnetic material gradually increases angularly or gradually decreases angularly in order to obtain an angularly extended magnetic potential energy area in each angular period of the annular magnetic path.
摘要:
A drive arrangement for an electronic time-keeping device in which a rotor member is juxtaposed with a stator member, one of the members being provided with a pair of coils including a sensing coil (pick-up coil) and a drive coil. The other member carries a pair of oppositely poled magnets cooperating with the coils. A NPN transistor has a collector-emitter network in series with the direct-current source and the drive coil while the sensing coil is connected in a base-collector network of the transistor.
摘要:
A horological instrument includes an oscillator such as a balance wheel. The oscillator carries a coil, which may consist of a single conductive ring. Current is induced in the moving coil by mutual induction from a fixed coil. One or more fixed magnetic fields are positioned to drive the energized coil. A circuit is provided to energize the coil with current at the proper moment during its oscillation.
摘要:
A device for varying the resonance frequency of an oscillating system, comprising a condenser coupled to said system by means of an electronic two-way switch, open and closed condition of this switch being controllable in such a way that the apparent value of the condenser and thus the resonance frequency of said system may be shifted in accordance with the relation between the duration of closed and open condition of the switch.
摘要:
AN ELECTRONICALLY POWERED CLOCK HAVING THREE MAGNET MEANS CONCENTRICALLY FIXED TO A BALANCE WHEEL AND THREE COILS MOUNTED RESPECTIVELY COAXIALLY WITH THE MAGNET MEANS WHEN SAID BALANCE WHEEL IS IN ITS ZERO POSITION. THE SERIES-CONNECTED OUTSIDE COILS SERVING AS EXCITER COILS FOR A TRANSISTOR SWITCHING ARRANGEMENT, THE INSIDE COIL SERVING AS DRIVE COIL FOR THE BALANCE WHEEL, AND THE MAGNET MEANS HAVING SUCH DIMENSIONS AND SUCH POSITIONS WITH RESPECT TO EACH OTHER THAT EVERY MAGNET MEANS COMING
AWAY FROM ONE COIL AND SIMULTANEOUSLY APPROACHING NEIGHBORING COIL WILL GENERATE AN EXCITATION PULSE AND AT THE SAME TIME EXPERIENCE A DRIVE PULSE.
摘要:
In an electromagnetic driving system for timepieces during the first half-oscillation of the oscillating member an astatic magnet system swings over only one coil inducing therein an impulse which opens two complementary transistors. The current flowing through the transistors and the coil creates a repellent impulse on the magnet system. The circuit includes blocking means rendering ineffectual the impulse induced in the coil during the second half-oscillation.
摘要:
A timepiece escapement mechanism including a resonator and an escape wheel arranged to cooperate with this resonator directly or indirectly through a stopper forming part of this escapement mechanism, this escape wheel including a succession of tracks carrying magnetic or electrostatic field potential ramps arranged to cooperate with the resonator or respectively with the stopper, this escapement mechanism comprising a non-return device arranged to oppose the recoil of the escape wheel, and the stopper cooperates, on the one hand, with a plate forming part of the resonator and, on the other, with these magnetic or electrostatic field potential ramps by at least one pole shoe forming part of the stopper and arranged to move in the field corresponding to the magnetic or electrostatic field potential ramps.
摘要:
An escapement mechanism including a stop member between a resonator and two escape wheel sets each subjected to a torque, and each including a magnetized or ferromagnetic track over a period. The stop member includes at least one magnetized or ferromagnetic pole shoe, transversely movable with respect to travel of a surface of the track. The pole shoe or the track creates a magnetic field between the pole shoe and the surface, and the pole shoe is confronted by a magnetic field barrier on the track just before each transverse motion of the stop member actuated by the period action of the resonator. The escape wheel sets are each arranged to cooperate alternately with the stop member, and are connected to each other by a direct kinematic connection.