Abstract: A single-semiconductor motor fan comprises a cylinder; a fixed armature with the central portion fitted over the lower end of the outer periphery of the cylinder and having a plurality of salient poles; a plurality of single-phase armature coils mounted on the armature; bearings fixed on the inner periphery of both ends of the cylinder; a rotary shaft rotatably supported by the bearings; a cup-shaped rotor fixed on the upper end of the rotary shaft; an annular magnet fixed on the inner surface of the rotor and magnetized into N and S poles having the same pitch as those of the salient poles, the N and S magnetic pole surfaces facing the salient pole surfaces with a space therebetween; a radial fan composed of a plastic cylinder fitted over a protruding portion of the rotor and a plurality of plastic plates extending radially outwardly of the cylinder, the height of the radial fan not exceeding the height of the protruding portion of the rotor; a position detecting element for detecting the position of the mag

Abstract: There is disclosed a blind person guide device comprising a walking stick, a source mounted on a front face of the walking stick for emitting a beam of infrared radiation in a forward direction, a photoelectric element mounted on the front face of the walking stick for receiving infrared radiation reflected from an object irradiated by the beam, an electric circuit for producing information as to a distance to the object based on the illuminance or energy of received radiation on the photoelectric element, an oscillator for generating electric vibrations having a frequency and an amplitude which are dependent on the distance information produced by the electric circuit, and a vibrator vibratable in response to the electric vibrations and having a vibrating surface against which a human skin can be pressed.

Abstract: A m-phase semiconductor electric motor comprises an rotary transformer to excite a rotor; a shaft and a bearing for rotatably supporting the rotor; an exciting coil for exciting the rotor magnetic poles; the rotary transformer includes a first and a second soft-ferrite core having magnetic paths and arranged to rotate relative to each other, the first core is coupled to the rotor shaft, the second core is fixed to the motor housing, a primary and a secondary coil are mounted on the second and first cores, respectively; the motor further comprises an oscillator for supplying the primary coil with a high frequency current; an electric circuit for rectifying the output of the secondary coil to energize the exciting coil; a fixed armature having m-phase coils; position detecting means for generating rotor position signals, each of the rotor position signals having positive and negative portions alternating every 180 degrees electrical angle; means for providing a reference voltage for commanding output torque; a

Abstract: Blind guide device is disclosed. The device comprises a light-emitting element, a first electric circuit for generating an electric pulse and causing pulsating-conduction of the light-emitting element, a first lens for converging the light emitted from the light-emitting element onto a body to be detected, a mark attached to the body to be detected for performing retroreflection action, a second lens and a photo-detector element for receiving the light reflected by the body to be detected and the mark, a second electric circuit for amplifying the output electric signal of the photo-detector element and holding an electric signal synchronized with the electric pulse, a third electric circuit for generating an electric signal whose frequency or amplitude varies in response to the output electric signal of the second electric circuit, and an electro-acoustic transducer or vibrator for converting the output electric signal of the third electric circuit into a sound or into a stimulation.

Abstract: An apparatus for removing torque ripples comprises a permanent magnet rotor, position sensors, stator armature coils, an operational circuit for effecting an arithmetic operation on detected signals from the position sensors, and a control circuit for driving the stator armature coils. According to another embodiment, an apparatus for removing torque ripples includes a direct-current motor having Y-connected armature coils, a detector for detecting counterelectromotive forces in the direct-current motor, an operational circuit for effecting an arithmetic operation on output signals from the detector, and a transistor for driving the direct-current motor.

Abstract: A semiconductor electric motor is disclosed which comprises: an outer housing; a cylindrical magnetic core fixedly mounted to the inside of the outer housing; polyphase armature coils mounted upon the magnetic core; a rotative shaft rotatably held by bearings mounted upon the outer housing; a rotor which is fixed to the rotative shaft and which is excited by exciting coils mounted thereon in such a way that the outer surface is polarized south and north at regular intervals and that the produced magnetic field penetrates through the armature coils; a first core made from a magnetic material and centrally provided with a hole which is made stationary relative to the rotative shaft extending through the hole; a second core made from a magnetic material and fixed inside the outer housing; the first and second cores cooperating with secondary and primary coils respectively mounted upon the first and second cores to constitute a rotary transformer; an RF oscillator consisting of a semiconductor circuit and acting

Abstract: A direct current motor comprising a field magnet with 2np magnetic poles, magnetized to N and S poles with equal angular intervals, where n is an integer of 1 or more and p is an integer of 2 or more; a magnetic member for closing the magnetic circuit of the magnetic circuit of the magnetic poles of the field magnet; n(py.+-.1) armature coils disposed in such a manner that the angular intervals of the electrically conductive portions of the armature coils, contributing to the generation of torque in the armature coils, are substantially equal to the magnetic pole width of the field magnet, where y is an integer of 3 or more; a wave-winding-type armature on which the armature coils are disposed, overlapping on each other, with an equal pitch, the wave-winding-type armature being directed towards the field magnet within the magnetic circuit; electric power supply control device for commutating the commutator current np(py.+-.1) times or 2np(py.+-.

Abstract: An apparatus for removing torque ripples comprises a permanent magnet rotor, position sensors, stator armature coils, an operational circuit for effecting an arithmetic operation on detected signals from the position sensors, and a control circuit for driving the stator armature coils. According to another embodiment, an apparatus for removing torque ripples includes a direct-current motor having Y-connected armature coils, a detector for detecting counterelectromotive forces in the direct-current motor, an operational circuit for effecting an arithmetic operation on output signals from the detector, and a transistor for driving the direct-current motor.

Abstract: The disclosed mode changeover apparatus for a magnetic recorder/player features motor-assisted movement of a magnetic head-carrying support base relative to a deck between playback, cue and review and stop positions. The support base is biased toward the stop position and is moved to a playback position responsive to rotation of the motor in a first direction and to the cue and review position responsive to rotation of the motor in the opposite direction.

Abstract: A direct current motor comprises a field magnet having 2 mn magnetic poles magnetized with the same angular intervals as those of the magnetic poles N and S, where m is an integer of 1 or more, and n is an integer of 4 or more, a magnetic member for closing the magnetic circuit of the magnetic poles of the field magnet, an armature in which m(2n.+-.n) armature coils are arranged each magnetically with a phase angle of 360/(2n.+-.2) degrees, the armature being directed towards the magnetic poles in the magnetic circuit, electric power supply control means for performing the switching of an armature current mn(2n.+-.2) times per revolution of the armature with respect to the field magnet, and a rotating shaft for rotatably supporting the armature or the field magnet, the rotating shaft being supported by a bearing disposed in an outer casing of the direct current motor.

Abstract: A direct current motor comprising a field magnet provided with 2 mn magnetic poles which are magnetized with the same angular intervals as those of the magnetic poles N and S, where m is an integer of 1 or more, and n is an integer of 3 or more; a magnetic member for closing the magnetic circuit of the magnetic poles of the field magnet; an armature in which m(2n.+-.1) armature coils are arranged with an equal pitch, the armature being directed towards the magnetic poles in the magnetic circuit; electric power supply control device capable of performing the switching of armature current 2 mn (2n.+-.1) times per revolution of the armature; and a rotating shaft for rotatably supporting the armature and one of the magnetic poles, the rotating shaft supported by a bearing disposed in an outer casing of the direct current motor.

Abstract: A remote controllable illumination apparatus comprising an article with a predetermined shape; a luminous body incorporated in part of the article; an acoustic-electric transducer for producing an output upon receiving the acoustic wave generated from sound generating source; an amplifier circuit for amplifying the output of the acoustic-electric transducer; and a control circuit for controlling the luminous body as to maintain the same lighted for a predetermined period of time in accordance with the output from the amplifier circuit.

Abstract: A direct current motor comprising a field magnet provided with 2n magnetic poles which are magnetized with the same angular intervals as those of the magnetic poles N and S, where n is an integer of 1 or more; a magnetic member for closing the magnetic circuit of the magnetic poles of the field magnet; a plurality of armature coils in such a manner that the angular intervals of the electrically conductive portions thereof, contributing to the generation of torque in the armature coils, are substantially equal to the magnetic pole width of the field magnet; electric power supply control device to which the terminals of the armature coils are connected; short-circuit members for short-circuiting the winding initiation terminals of predetermined armature coils and the winding end terminals of other predetermined armature coils through the electric power supply control device; an armature comprising armature coils in the first series and armature coils in the second series through which the short-circuit members

Abstract: A direct current motor comprising the field magnet pole of a permanent magnet and an armature having a plurality of armature windings. The field magnet pole has at least four magnetic poles and the angular spacing is equal to 360 degrees divided by the number of the magnetic poles, and at least one of the armature windings has an angular spacing which is (2n - 1) times the width of the field magnet pole, where n is a positive integer of 2 or more, and control means for successive switching, rendering said armature windings conductive, is provided.

Abstract: A direct current motor is provided with a field magnet having 4 mn alternating N and S poles (m being a positive integer of one or more and n being a positive integer of two or more) that are magnetized within segments of equi-angular width about the field magnet, a magnetic-material member for closing the magnetic path of the field magnet, and a rotatably mounted armature having m (2n-1) armature windings equally distributed thereabout in a non-superposed manner with respect to each other and in a face-to-face relationship with respect to the field magnet poles, each winding having an angular spacing between those conductor portions thereof that contribute to the generation of the torque that is equal to the angular width of the field magnet poles.

Abstract: A small-sized differential piston unit is disclosed. The piston unit has a cylinder filled with liquid medium and a piston slideably mounted in the cylinder. An operation rod is operatively connected to said piston. An improved sealing member consisting of a membrane is used to completely seal the liquid medium in the cylinder. Control means is provided for imparting fluid resistance caused by the liquid medium to the piston differently between its forward movement and backward movement in the cylinder.

Abstract: A direct current motor is provided with a field magnet having l(2m+2n) alternating N and S poles (l and m being positive integers of one or more and n being a positive integer of two or more) that are magnetized within segments of equiangular width about the field magnet, a magnetic-material member for closing the magnetic path of the field magnet, and an armature having l(2n-1) armature windings distributed thereon in a non-superposed manner with respect to each other and in a face-to-face relationship with respect to the field magnet poles, each winding having an angular spacing between those conductor portions thereof that contribute to the generation of the torque that is equal to the angular width of a field magnet pole.

Abstract: A direct current motor is provided with a field magnet having l(2m+2n) alternating N and S poles (l and m being positive integers of one or more and n being a positive integer of two or more) that are magnetized within segments of equiangular width about the field magnet, a magnetic-material member for closing the magnetic path of the field magnet, and an armature having 2ln armature windings distributed thereon in a non-superposed manner with respect to each other and in a face-to-face relationship with respect to the field magnet poles, each winding having an angular spacing between those conductor portions thereof that contribute to the generation of the torque that is equal to the angular width of a field magnet pole.

Abstract: There is described a device for remotely controlling the shutter of a camera. The device includes a housing which incorporates a microphone for receiving an acoustic wave having a relatively high frequency in an audio frequency range, which is generated by a tone generating source, an amplifier circuit for amplifying the output of the microphone, an actuator which is caused to make one reciprocation by the output of the amplifier circuit, and an electric source for energizing the amplifier circuit and the acturator. The device further includes mounting device for fixedly securing the housing to the camera, and a release device for operating the shutter of the camera with the aid of one reciprocation of the actuator.

Abstract: A coreless three-phase DC motor comprising a coil type armature formed with insulated windings. The armature is of a disc- or cylindrical-shape and is set rotatably against a field magnet provided with 2n magnetic poles N and S magnetized in equal angular widths. On the surface of the armature there are 3n/2 three-phase armature coils, wherein the angular width of each of the coils is equal to the width of the field magnet pole, the coils of each phase are shifted by 180.degree. of electrical angle from each other, and all the armature coils are arranged at equal angular intervals and not superimposedly with respect to one another.