Abstract: A stepping motor comprises a stator, a rotor and a control circuit. The stator vane is provided at two sides thereof with coils electrically connected with the control circuit. The stator vane comprises three magnetic pole ends spaced by 120 degrees, which constitute a rotor hole for receiving the rotor; the rotor comprises a magnetic rotor and a rotor shaft. The magnetic rotor comprises several magnetic pole, wherein, the stator is a single stator vane integrally formed or a stator vane consisting of three vanes, the number of magnetic poles of the magnetic rotor is an even number greater than 2 and can not be divided exactly by 3. The stepping motor is solid, durable, and can be simply assembled. Further, the step angle can be reduced by increasing the number of the magnetic poles, and therefore, the stepping precision is increased.

Abstract: The present invention relates to a dashboard illumination assembly for an automotive vehicle, comprising a housing and a dashboard pointer connected to the top of the housing, wherein a light source is installed inside the housing, the light emitted from the light source illuminates the dashboard pointer by passing through a light receiving surface and being reflected by a reflecting surface in the housing; and wherein a convex lensing member for converging the light is located in a light path from the light source to the light receiving surface of the pointer. The present invention has a simple structure, high illumination efficiency, low cost and high technical feasibility.

Abstract: A stepping motor includes a stator and a permanent-magnet rotor having a rotor axis. The stator is a stator blade made of soft magnetic materials whose center position is a rotor hole accommodating the rotor. Coils are provided on two sides of the stator blade. Within the stator blade are located three narrow grooves, each of which is disposed at an angle of 120° to one another along a radial direction of the rotor. Two ends of the narrow grooves are connected with the stator blade, and when a current is present in the coils a magnetic-pole end surface surrounding the rotor hole is formed by the part of the motor between two of the narrow grooves. The stator blade of the stepping motor is solid, resistant to twist and easily machined and assembled.

Abstract: A stepping motor includes a stator and a permanent-magnet rotor having a rotor axis. The stator is a stator blade made of soft magnetic materials whose center position is a rotor hole accommodating the rotor. Coils are provided on two sides of the stator blade. Within the stator blade are located three narrow grooves, each of which is disposed at an angle of 120° to one another along radial direction of the rotor. Two ends of the narrow grooves are connected with the said stator blade, and when a current is present in the coils a magnetic-pole end surface surrounding the rotor hole is formed by the part of the motor between two of the narrow grooves. The stator blade of the stepping motor of the present utility model is in integral that is solid, resistant to twist and easy to be machined and assembled.

Abstract: An optical switch for switching a light beam in an optical fiber communication line. The switch includes a hollow body, an optical system supported by a first part of the body for movement to act upon a light beam, and an actuator supported by a second part of the body for moving the optical system between first and second positions, in at least one of which positions the optical system acts upon a light beam. An elastic element is included, which has a first part connected to the actuator and a second part connected to the optical system for movement of the optical system by the actuator.

Abstract: The oscillating mass is integral with a toothed wheel which is engaged with pinions at the periphery of a plate. Many rotors at the periphery of the plate are located between sections of a peripheral, annular stator. The sections of the stator comprise cores and coils. It is thus possible with a simple construction of small thickness to obtain sufficient efficiency and power of the generator without considerable multiplication of the movement of the oscillating mass. The plate has a recess capable to receive a movement of an electronic watch of an existing caliber. The generator comprising the plate, the oscillating mass, the rotors and the stator constitutes an independent module capable to be assembled with a movement of an existing watch.

Abstract: The stator of the motor comprises two pole pieces (1, 2) which are axially staggered. An axially magnetized cylindrical rotor (5) is disposed in the openings or bores of said pole pieces. The rotor (5) is provided with an external toothing (3) which is continuously engaged with an internal toothing (4) of the stator. In the unexcited stator, the rotor (5) assumes a stable position by attraction to the pole pieces (1, 2). Due to the excitation of the stator by a pulse having a suitable polarity, the rotor is displaced to a diametrically opposed stable position. The toothings (3, 4) stay in engagement during said displacement, resulting in an angular displacement of the rotor, the angle being defined by the difference of the number of teeth of said toothings (3, 4). The motor allows a miniaturization and a simple control by alternating pulses of opposed polarities.

Abstract: An electromagnetic stepping motor has a stator with an armature having the shape of an isosceles trapezoid the base of which is interrupted by a central gap and which is provided with three pole faces. The rotor comprises a permanent magnet. The stator comprises two coils one of which is located between a pole face opposite said gap and one of the other two pole faces. The other coil is located between the pole face opposite said gap and the other of said other two pole faces. When a current passes through the coils, the rotor is subjected to magnetic fields having directions which are oblique to each other and which are symmetrical with respect to a diameter of the rotor. The sense of the coil currents determines the sense of the fields. The arrangement is such that one can create in the zone of the rotor a resultant magnetic field which can extend in any one of four different directions dependent on the sense of the currents passing through the coils.

Abstract: An electromagnetic stepping motor has a stator with an armature having the shape of an isosceles trapezoid the base of which is interrupted by a central gap and which is provided with three pole faces. The rotor comprises a permanent magnet. The stator comprises two coils one of which is located between a pole face opposite said gap and one of the other two pole faces. The other coil is located between the pole face opposite said gap and the other of said other two pole faces. When a current passes through the coils, the rotor is subjected to magnetic fields having directions which are oblique to each other and which are symmetrical with respect to a diameter of the rotor. The sense of the coil currents determines the sense of the fields. The arrangement is such that one can create in the zone of the rotor a resultant magnetic field which can extend in any one of four different directions dependent on the sense of the currents passing through the coils.

Abstract: A resilient member for connecting a crystal to a watch casing in which the crystal is used for generating acoustic signals. The member is of generally annular configuration with an inner portion rigidly connected to the circumference of the crystal, an outer peripheral portion connected to a supporting member of the watch casing, and a free portion extending between the inner portion and the outer peripheral portion. The free portion has a width and a thickness which permits flexing in a direction normal to the plane of the crystal so that the crystal can vibrate in a direction normal to its plane and act as an acoustical transmitting member.

Abstract: An electro-acoustic device for an alarm watch includes a lever moved by an oscillating electromagnetic field created by an electromagnet to vibrate a moving element or glass of the watch and produce a sound. The glass is elastically mounted on a sealing ring of the watch. The lever is mounted by one end to the watch and includes a tapered part adjacent the one end which is elastically deformable thereat so that a free end of the lever opposite the one end may vibrate and its fundamental frequency in response to the oscillating electromagnetic field. The free end of the lever carries a stem coupling the lever to the glass and transmitting the oscillating motion of the lever to the glass, which vibrates on the elastic ring to produce the sound.