Abstract: A magnetic actuator for controlling the electrical induction in a pickup coil to a predetermined speed of rotation of a workpiece actuated shaft consisting of a series of magnets in a fixed circular relationship to a rotating shaft and a complimentary series of magnets positioned on the first series and magnetically retained thereon, a series pickup coil also circularly posiitoned relative to the rotating shaft but of a greater diameter than the ring formed by the magnets, and upon the rotation of the shaft workpiece, the magnets with continue to the attracted; as the rotation increases the centrifugal force of rotation increases and as the speed of rotation attains a given speed, the centrifugal force exceeds the magnetic attraction between the two series of magnets; at this speed the second series of magnets will move outwardly from the rotating shaft; the mgneticfield of the moved magnets become vertically aligned with the series pickup coil and wherein the magnetic-field induces an electrical potential in

Abstract: For fixing the winding ends (1, 2, 3, 4) of a stator winding in a dynamoelectrical machine, in which the winding ends have inner (2, 3) and outer layers (1, 4), which are mechanically and electrically connected to each other at the axially outer end, the winding ends are clamped between an outer ring (14) and an inner ring (15). The bracing of the two rings (14, 15) and of said winding ends is performed by filling pieces (16) being inserted between two neighboring winding ends (1, 2) in the circumferential direction of the winding overhang, of which filling pieces at least some are wedged in the radial direction with the two rings (14, 15) by means of retightenable wedges (17, 18).This clamping produces a rigid winding overhang, the wedging can be retightened if required and also disassembled without any great effort.

Abstract: An electrically operated air pump for supplying air to the exhaust system of an internal combustion engine having a central mounting plate which is integral with the electric motor assembly. The armature shaft of the electric motor drives an impeller within a working chamber defined by an impeller housing and one side of the mounting plate. A silencer housing encloses the motor assembly and contains an air circuit for channeling air to and from the working chamber of the pump. The air circuit contains a solenoid operated air valve for restriction of outlet air, and sound insulation means for external sound reduction. The central mounting plate, impeller, impeller housing, and silencer housing are constructed of a polymeric material which allows complex features to be molded into the part thereby minimizing machining and assembly complexity.

Abstract: A rotating electric machine comprises a rotor and a stator each having a ferromagnetic core and being separated by a cylindrical air gap. The stator core is provided with three peripheral rings of magnet poles, the poles in each pole ring having alternate opposite polarities and the pole rings having the same number of poles and being spaced axially apart. The rotor core is provided with three peripheral ferromagnetic rings each having peripherally uniformly spaced teeth and spaces therebetween. These toothed rings are located opposite the magnet pole rings and each includes a number of teeth equal to half the number of magnet poles in each magnet pole ring. The mutual angular position between the magnet pole ring and the toothed ring in each associated pair is displaced peripherally in relation to the corresponding position in the other associated pairs by an angle equal to one third of the peripheral extension of a magnet pole pair.

Abstract: A built-up stepping motor includes upper and lower housings each having an internal space and joined together with a support plate disposed therebetween. The lower housing retains therein a stator and a rotor disposed in the stator, while the upper housing holds therein a reduction gear for reducing the output speed of the motor. The output end of a rotor shaft extends through the support plate and meshes with a first gear of the reduction gear. The upper and lower housings are assembled together by interlocking engagement between locking projections and mating holes. A shock-absorbing damper is disposed between two stator cores to protect them against chattering.

Abstract: An actuator (10) comprises a housing having sections (11, 11') joined by a band clamp (12). A high torque, low speed motor (14) is provided in the housing and has a rotor (17) associated with a ballscrew rod (18) which is received in the hollow end of a ballnut/rod (20). The ballscrew rod (18) and the ballnut/rod (20) are provided with grooves (19, 20 respectively) between which ceramic balls (20) are entrained. The rod (20) translates in only a rectilinear direction and the grooves (19) of the ballscrew rod (18) are protected from the environment by the ballnut/rod (20) which covers the free end of the ballscrew rod (18).

Abstract: An induction generator is disclosed wherein both the stator and rotor windings are utilized to generate power with the three phase winding of the stator and rotor each connected in parallel with a delta connected capacitive network connected therebetween. The electrical output may thus be increased by a factor of four over a conventional generator of the same size.

Abstract: A stator drain supports stator windings and rotor bearings and permits fluid coolant for the rotor bearings to be drained outward past the stator windings from the bearings. The drain is formed of a non-metallic material and has an inner surface for supporting a bearing liner of the rotor bearings, a plurality of spaced openings for receiving stator windings and drain slots extending through the annular member at locations corresponding to spaces between the stator windings for draining the fluid coolant. The stator drain is useful in a dual permanent magnet generator, for example.

Abstract: The invention concerns the stator of an electric motor comprising a packet a stacked laminations provided with laterally open slots for receiving the active portions of the windings for the motor poles in which the surface of each slot carries an inner layer of a molded insulating material applied to the insulation surface of the slot, the layer in each slot being united with the layer of each one of the adjoining slots at the two outer sides of the stator by means of an insulating lateral layer so that the combiantion of the layers forms a one-piece molded layer over the slot region, thus providing good insulation of the magnetic circuit in electric motors designed to have a long service life at elevated temperatures such as those used for central heating circulation pumps.

Abstract: An electric motor comprises a plurality of electromagnets arranged annularly in parallel, an electric switching circuit connected to each electromagnet, an iron cylinder arranged inside the electromagnets and having peripheral surface to be attracted partially arbitrarily by part of the electromagnets, a main axle positioned at the center of the iron cylinder and coaxially arranged with an axial core of the iron cylinder via bearings, and eccentric axles provided at both ends of the main axle so that the eccentric axles are arranged in accord with the center of the electromagnets to define a power generating axle.

Abstract: Method and apparatus for providing electrical insulation and hydrogen leakage resistance functions required on a radial lead portion of a field winding assembly for rotors of hydrogen cooled turbine-generators. A glass cloth tube impregnated with an epoxy resin binder is machined to desired tolerances to provide a controlled interference fit over the radial lead conductor outer surface. A coating of the epoxy resin or insulating varnish may be brushed on the interface surface. The pre-machined insulating tube not only prevents hydrogen gas from entering the rotor bore area, but also electrically insulates the rotor field windings from the rotor shaft.

Abstract: A geared electric motor is provided with an armature having an armature shaft supported within a motor yoke and a gear casing attached to said motor yoke by a radial ball bearing having an outer ring fixed to the gear casing and an inner ring fixed to the armature shaft of the armature using a stop ring and a push nut. A commutator is mounted on the armature shaft and a plurality of brushes carried by brush holders are in sliding engagement with the commutator. The brush holders are mounted on a brush holder base connected by elastic bushings to a brush holder base setting member which in turn is secured to the gear casing in engagement with the outer ring of the ball bearing to locate the outer ring in the gear casing.

Abstract: An electrostatic micro-motor apparatus capable of transmitting a driving force of an electrostatic micro-motor comprises a rotor which has the shape of a gear substantially. A plurality of electrodes are disposed at a predetermined circumferential region around the rotor so as to confront the teeth of the rotor, and such that a circumferential gap is defined at the remaining circumferential region around the rotor. A transmission gear is provided in the circumferential gap so as to be brought into engagement with the rotor.

Abstract: A brush holder device for an electric motor includes a support for the brushes, this support having a central passage through which a commutator, fixed to the shaft of the motor can be introduced. Stop means are also provided for holding the brushes in a position in which they are spaced away from this passage.In accordance with the invention, the stop means include a cover member having a base which is fixed with respect to the support plate and which is extended axially through a frusto conical wall which is adapted to be folded back on itself.

Abstract: An angular single-phased electromagnetic actuator including a stator structure constituted of a first magnetic stator part and a second magnetic stator part connected exclusively by a non-magnetic spacer. A movable member including a thin magnetized portion is provided within an air gap between the stator parts. Stator parts are selected so as that: ##EQU1## where, S.sub.fer is the section of the stator part as measured in any radial plane included in the area scanned by the movable radial plane defined by the radius between the two adjacent poles of the magnetized portions,S.sub.a is the surface of one among the 2N pairs of poles as measured in the plane normal to the magnetization,B.sub.fer is the induction within the stator,B.sub.a is the induction within the magnet, with ##EQU2## B.sub.r is the remanent induction of the magnet, L is the magnet thickness, andE is the distance between the stator poles, in the absence of the magnetized portion.