Abstract: An electrical actuator for actuating a valve or other device includes an electrical motor rotating a rotary member and centrifugal body. The centrifugal body is mounted to the rotary member and is biased to normally assume an inner position with respect to the rotary axis of the rotary member, and to move to an outer position by centrifugal force when the rotary member rotates. An actuator pin is normally biased to a non-actuating position but is movable to an actuating position, to actuate a valve or other device, when the centrifugal body is moved to its outer position by centrifugal force upon the rotation of the rotary member by the electric motor.

Abstract: A turbo-generator has a tapering cooling part positioned between a vapor turbine part and a generator part, and casings of these parts are combined together to form a sealed single-boundary structure. A turbine shaft in the vapor turbine part, a rotary shaft in the cooling part and a generator shaft in the generator part are combined unitarily and are supported by bearing parts in such a way that the unitary shaft does not pass from the boundary structure. The tapering cooling part has a smaller diameter at the side of the generator part, and the inner circumferential surface of the cooling part forms a labyrinth structure to separate the atmospheres of the vapor turbine part and the generator part.

Abstract: An induction synchronous motor includes a unitary rotor having first and second pole type rotor cores, first and second stators, a voltage phase shifting means, and DC magnetic excitation circuits. Both of the rotor cores are mounted on a common rotor axis with a predetermined space between them. The first and second rotor windings are wound on the first and second rotor cores, respectively. A plurality of diodes is each connected in parallel between series-connection nodes of the first and second rotor windings. A plurality of rotor conductors is provided on the peripheries of and extend through the first and second rotor cores. A pair of short-circuit rings short-circuits both ends of the plurality of rotor conductors. The first and second stators surround the first and second salient pole type rotor cores, respectively, and have the same number of poles as the first and second rotor cores. The voltage phase shifting means selectively produces a phase difference of 0.degree.

Abstract: Tilters 2, are made of an electrotiltable material comprising an electroshearable material having a unidirectional gradient of responsivity, such as piezoelectric ceramic. Responsive to an activating electrical signal, tilters 2, tilt surfaces 26, with large side strain and negligible side stress. Forcible tilt provides forceful positioning of objects such as rollers, optical elements, and fluids. Tilting combined with a normal force of traction 16, forcefully moves a roller 12. Rollers pass tilting power to objects 14, in tractive contact such as a motor shaft 14. Alternating activation sense and tilting gradient 10 giving zero tilt at support surfaces 7, provide rigidity with negligible stress. Other embodiments use tilt to position optical elements, vary the flow resistance of fluid in a duct, and bunch charged particles. The actuator's tiltable surface 26 has an optical or acoustic element 52 attached for changing the angle at which radiation interacts with the element.

Abstract: A magnetic disk drive device has a spindle motor for rotatingly driving magnetic disks in a predetermined direction, and a clamp member for mounting the disks on the spindle motor. The spindle motor has a hub rotatably supported through bearings and having a portion for mounting the magnetic disks, a rotor magnet carried by the hub, a stator disposed to oppose to the rotor magnet, and magnetic fluid seal arrangement for preventing scattering of lubricant from the bearing means. The magnetic disk drive device further has a magnetic shield disposed on the radially outer side of the magnetic fluid seal arrangement. One of the bearings rotatably supporting the hub may be charged with a lubricant having a comparatively low viscosity, while the other bearing may be charged with a lubricant having a comparatively high viscosity.

Abstract: A spindle motor comprises a housing, a hub which is rotatable relative to the housing, a rotor magnet mounted on the hub, and a stator disposed facing the rotor magnet. A coil holding member for extending a lead section of an armature coil of the stator to the outside thereof is disposed in the housing. Female screw holes into which fixing screws for mounting clamp members are screwed and through holes connecting with the female screw holes are formed in the hub. Furthermore, supporting projections extending toward the housing are disposed in the stator core of the stator, and such supporting projections are supported in the housing.

Abstract: An electric motor comprises bracket shaped end plates having extensions that lead directly to the stator and are connected to the stator by introducing the extensions into grooves. The motor includes a layered arrangement of components on the collector-side, comprising a carrier plate with a punched grid pattern forming the electric wiring. The grid pattern, together with the carrier plate, carry brush holders. Next in the axial direction is a switching ring bridging preselected line connections of the grid pattern by means of short circuiting bridges, and which is rotatably seated in a central recess of a mounting plate provided on the end plate. All connections can be fabricated by simple pressing and plugging and the motor is suited for fully automatic assembly operations.

Abstract: In the gas-cooled electric machine, the stator winding bars, which are connected to one another electrically and mechanically outside the stator core assembly (2) in the overhang space by means of metallic lugs, are provided with caps (8) which virtually completely surround the lugs while leaving free one or more approximately axially extending ducts (9). These ducts (9) are open towards the stator core assembly (2). At its end on the partition side, the cap (8) has an opening (10) which is freely connected to said ducts (9). A flexible line (11) leads from this opening directly into the suction chamber (14) of the fan (5).As a consequence of the pressure difference between the suction chamber (14) and overhang space (13), some of the coolant conveyed by the fan (5) flows through said ducts and cools the rod ends and lugs (7).

Abstract: An assembly in which a rotating shaft is supported by a magnetic bearing has a back-up bearing to support the shaft in the event of failure of the magnetic bearing, the back-up bearing comprising one or more coaxial bearing parts each including cylindrical rolling elements supported on a single raceway, or each part comprising a ball race with radially inner and outer raceways. If a radially outer raceway is provided it is secured to an anchorage, such as a housing. A layer of dry bearing material is secured to rotate with each raceway to be rotated by the shaft, the dry bearing material having a surface opposite to the shaft. After any failure of the magnetic bearing the shaft is contacted by the layer of dry bearing material, and the rolling elements are brought up to speed at a slower rate than otherwise would be the case, because of slipping of the shaft relative to the dry bearing material.

Abstract: A brush holder and voltage regulator are secured to a metallic end frame of an alternating current generator by a metal screw that extends through aligned openings that extend respectively through the brush holder and voltage regulator. The brush holder has a pair of opposed metal terminals and the voltage regulator has a pair of opposed metal terminals. All of the terminals have openings that are aligned with the openings in the brush holder and voltage regulator. The screw extends through the openings in the terminals and has a threaded portion that is threaded into a threaded bore in the end frame. One of the terminals on the brush holder directly engages a surface on the end frame. The other terminal on the brush holder directly engages a terminal on the voltage regulator. The other terminal on the voltage regulator is electrically connected to the end frame by the screw.

Abstract: A sleeve-type plain bearing of an axial-flow fan motor, made of sintered oilless metal, for bearing a rotation of a rotor has plural protrusions on a thrust bearing surface in a direction vertical to an axial direction of the rotor, and thereby lubricant impregnated in the sintered oilless metal is always supplied in spaces formed by the thrust bearing surface, the protrusions and a thrust plate provided on the rotation shaft.

Abstract: A supporting device supports a vibrating body or contacting member at one or plural locations in a vibration wave driven motor in which the aforesaid vibrating body is caused to generate traveling waves when an alternating current is applied to the electromechanical energy transducing element connected to the vibrating body thereby to move relatively the aforesaid vibrating body and the contacting member being in contact therewith under pressure.

Abstract: A spindle motor comprises a housing, a hub arranged for rotation on the housing, a couple of bearings interposed between the housing and the hub, a rotor magnet mounted to the hub, and a stator mounted to the housing so as to face the rotor magnet, in which at least one of the two bearings is of single seal type having a seal at one side. Also, a flexible pc film is provided for supply of electric energy to the stator and arranged for improved connection to an armature coil of the stator.

Abstract: A magnetically levitated superconducting bearing includes a magnet (2) mounted on a shaft (12) that is rotatable around an axis of rotation and a Type II superconductor (6) supported on a stator (14) in proximity to the magnet (2). The superconductor (6) is positioned so that when it is cooled to its superconducting state in the presence of a magnetic field, it interacts with the magnet (2) to produce an attractive force that levitates the magnet (2) and supports a load on the shaft (12). The interaction between the superconductor (6) and magnet(2) also produces surface screening currents (8) that generate a repulsive force perpendicular to the load. The bearing also has means for maintaining the superconductor at a temperature below its critical temperature (16, 18). The bearing could also be constructed so the magnet (2) is supported on the stator (14) and the superconductor (6) is mounted on the shaft (12).

Abstract: Supercurrent bearings make use of high temperature superconducting coils to support a loaded rotor against radial or thrust loads. One such bearing is an electrodynamic bearing in which superconducting coils are used on both the stator and the rotor to develop a repulsive force. Current is induced in the rotor coils by current supplied to stator coil. Another bearing is an active magnetic bearing in which both superconducting and non-superconducting coils are used on the stator, while the rotor has a laminated secondary to develop attractive forces. The superconducting coils are used for biasing or static loads while the standard (non-superconducting) coils are used for balancing dynamic loads. The high current density of superconductors translates to higher load capacity, smaller bearing size and a lighter bearing.

Abstract: A shaft support assembly particularly well suited for supporting the high speed rotor in a laser polygon mirror drive motor assembly. The rotor has conically tapered ends. These ends are supported by conical plain bearings. At least one of the bearings is adjustable with respect to the shaft and the bearing so that the gap between the shaft and bearing can be easily adjusted.

Abstract: Disclosed is a broad beam ultrasonic transducer of sandwich construction, having piezoceramic laminae (2), fitted with electrodes, and plates/films (3, 13) in the shape of a parallelepiped with a width (B) to length (L) ratio of 0.42 and in which the relative thicknesses of the piezoceramic laminae and the plates/films are chosen such that one side surface of the parallelepiped undergoes an in-phase oscillation behavior.

Abstract: A traveller having two ultrasonic motors, each of which movable member drives the driving wheel respectively. The ultrasonic motor comprises a vibrating member, a moving member and a pressure regulating member. The driving circuit sends signals to turn the ultrasonic motor, which turn the moving memeber to turn the driving wheel. With the driving wheel turning, the traveller travels freely in any direction. Each of two ultrasonic motors receives respective signals to travel freely in any direction as a effect.

Abstract: An induction synchronous motor with two rotor cores and two stator cores includes a rotor having two mutually connected first rotor windings (31,31) of a predetermined number of poles and two mutually connected second rotor windings (33,34) connected of a different number of poles with respect to the number of poles of the first rotor windings; and two stators having two stator windings (21,22) of the number of poles identical with the number of poles of the first rotor windings (31,32) and two excitation windings (41,42) of the number of poles identical with the number of poles of the second rotor windings (33,34). The motor further includes a rectifier circuit (35) for rectifying outputs from the second rotor windings (33,34) and supplying the rectified voltages to the first rotor windings (31,32) at a synchronous operation. A phase shifter (SW1) associated with the first stator windings (21,22) produces a phase difference of 180.degree.

Abstract: An apparatus and method cooling the motors for radio-controlled scale model vehicles. Air is received and directed to at least a portion of the motor while the car is moving. The motor is therefore air cooled to reduce the temperature of the motor. The reduced temperature contributes to longer motor and battery life. The apparatus can include an air inlet positioned on or built into the vehicle body with a conduit directed to an air outlet adjacent the motor.