Abstract: An end shield and bearing assembly for an electric starter motor for internal combustion engines comprises a bearing extension and a bearing for supporting a drive shaft and received in the bearing extension. A cover cap is fitted over the bearing extension of the commutator end shield and encloses the end of the drive shaft and an armature longitudinal play compensator mounted on the above shaft end. A member is located lubricant-tight in the cover cap between the end face of the bearing extension and the cover cap and defines a lubricant space surrounding the compensator.

Abstract: Rotor of a magnetomotive device has a discrete permanent magnetic and a ferromagnetic core disposed within an injection molded, synthetic plastic body in the form of a flywheel. The core is of integral, laminar construction and includes hub and counterweight portions and a pair of radially extending, circumferentially spaced arm portions. At their outer ends, the arm portions terminate in pole shoes with opposed, undercut edges to retain the discrete permanent magnet therebetween. Each of the arm portions has a laterally extending shoulder portion and, at their inner ends, connect to the hub by narrow neck or stem portions which are resiliently flexible. From the center of rotation of the rotor, the stem portions are each disposed along a given radius.

Abstract: A miniature motor having a frequency generator comprising a miniature motor consisting of a stator equipped with a permanent magnet for forming a magnetic field, and a rotor having windings wound on a rotor core, constructed so as to feed electric current to the rotor windings through a commutator which makes sliding contact with current-feeding brushes held by a brush holder fixedly fitted to a small motor case. A frequency generator is provided consisting of a rotor for detecting revolution, a stator disposed in such a manner as to face the rotor, a permanent magnet for forming a magnetic field between the rotor and the stator, and a frequency-detecting coil generating an induced voltage proportional to the revolution of the rotor.

Abstract: A rotating apparatus includes a stator, a rotor rotatable in the stator and made of nonmagnetic metal. An inner space with a pair of radially spaced openings is provided in the rotor and a permanent magnet is fitted in the inner space so as to be symmetrical with respect to the axis of the rotor. A magnetic metal section is connected to the rotor for filling each of the openings.

Abstract: The problem of preloading a rotor assembly (14) in a dynamoelectric machine (10) of the permanent magnet type is solved by providing a hub (20) having a plurality of outwardly opening, annularly spaced slots (22, 24). The slots are outwardly converging and separated by outwardly diverging partition portions (26) of the hub. A plurality of outwardly converging permanent magnets (30) respectively are disposed in the slots. A containment shell (32) surrounds the hub. Wedges (36) are inserted between the base of each permanent magnet and the bottom (24) of its respective slot for loading the permanent magnets radially outwardly toward the containment shell and against the sides of the slots, thereby to place the partition portions of the hub under tension in a static condition of the rotor assembly.

Abstract: In a 2 pole universal motor for a circular saw a secondary winding provides dynamic braking. Both run and brake windings are split electrically with respect to the armature. All windings are double-ended and wiring and winding is arranged so that all windings may be terminated directly to fixed termination points, four at each end of the stator, providing for axially oriented plug-in connection of brushes at the commutator end and switch and line at the fan end. There are no jumpers within the stator.

Abstract: The invention relates to a collectorless direct-current external-rotor motor (2), which includes a stator (6) with stator windings (12) fastened to a motor flange (4), an external rotor (14) enclosing the stator (6) on its side facing away from the motor flange (4), as well as an electronic circuit arrangement (18) driving the stator windings (12). This circuit arrangement (18) has a conductor plate (24) provided with electronic components (22) arranged adjacent to the flange-side facing the stator (6), as well as several power semiconductors (28) electrically connected to the conductor plate (24), arranged in heat-conducting contact with the motor flange (4). The power semiconductors (28) are joined indirectly by an annular disk-form cooling body (40) to the motor flange (4) to provide a heat-conducting effect. The cooling body (40) forms a preassembled component with the conductor plate (24) and a carrier element (42) which support the conductor plate (24).

Abstract: In a vehicle generator comprising a bracket, a shaft rotatably supported by the bracket, a rotor fixed to the shaft, fans fixed to the rotor, a stator disposed at an outer circumference of the rotor and fixed to the bracket, a rectifier and a brush holder attached to a bottom surface of the bracket, and a partition plate attached to the brush holder and extended axially and radially between the bracket and the brush holder, the improvement in that an opening portion is formed in the axial portion of the partition plate at a central portion thereof. A groove may be provided in a portion of the bracket opposed to the opening portion.

Abstract: Apparatus for providing selectively from time to time in the same member 11 either rotary motion 12 about an axis 13 or linear movement 14 in an axial direction from one position to another comprises: an electric motor 15 including a stator 16 comprising a housing 17 and a magnet 18 for providing a first magnetic field therein; a rotor 19 comprising an armature 20, for providing a second magnetic field, on a shaft 11; all of the above being coaxial about the axis 13; and a commutator 21 (mechanical or electronic) and associated circuitry 22 for conducting electrical energy to the motor 15 to provide, selectively, rotation 12 of the shaft 11 in a selected direction (clockwise or counterclockwise) and/or axial translation 14 of the shaft 11 in a selected direction (toward or away from the first magnetic field). For rotation, the magnetic fields are substantially perpendicular; for translation, they are substantially parallel.

Abstract: A brush holder assembly for use in a dynamoelectric machine has an electrically conductive support and is releasably mounted on a part of the frame of the dynamoelectric machine. The support has a freestanding front terminus, and a plurality of individual brush holders are each mounted by a detachable connection to the front terminus in side-by-side relation to each other. The detachable connection permits individual replacement of the brush holders. The brush holders each have a front end and a quick disconnect mount on the front end. A brush which is insertable in the brush holder has a disconnect terminal connectable with the mount. A constant brush force applying mechanism is located on the front end of the holder. The detachable connection, brush holders, constant brush force applying mechanism, quick disconnect mount and disconnect terminal are all adjacent each other to be accessible at the front terminus to facilitate safe and fast service thereof.

Abstract: An alternator rectifier bridge is incorporated into an alternator housing by inserting half of the diodes of the bridge into apertures formed into an alternator housing end plate which then serves as one output for the alternator and also as a massive heat sink to dissipate heat generated in the diodes. The other half of the diodes of the bridge are inserting into apertures formed in a radiator plate which is embedded into a plastic circuit member together with conductor members which interconnect electrodes of the diodes to stator windings of the alternator and also perform other electrical connections required for efficient manufacture and proper operation of the alternator. The radiator plate serves as the other output for the alternator and also as a heat sink.

Abstract: Provided is a rotor structure by which slot ripple is reduced so that an a.c. synchronous servo motor can achieve a smooth rotation. A rotor structure is provided in which two rotor elements (30, 30') are juxtaposed and brought out of registration in a circular position by an angle (.theta.) corresponding to a half wave length of a slot ripple wave caused in a rotor having a prior structure, thereby each slot ripple wave caused by each rotor element (30, 30') is cancelled out by the other.

Abstract: The invention relates to an improvement in the design of the magnetic circuit in a permanent-magnet rotary machine, e.g., a servomotor, with an object to stabilize the output of the motor with respect to temperature variation. The inventive improvement is in making the value of (A.sub.m B.sub.m)/(A.sub.y B.sub.ys), which is called the area factor .alpha., larger than 1 but smaller than 5, A.sub.m and B.sub.m being the cross sectional area and magnetic flux density, respectively, in the magnetic circuit of the permanent magnet and A.sub.y and B.sub.ys being the effective cross sectional area and saturation magnetic flux density at room temperature, respectively, in the magnetic circuit of the yoke.

Abstract: A generator system having a failure mode cooling-oil lubricating auxiliary compartment structurally integrated into the generator casing so as to provide a supplement to primary cooling and lubrication functions. A coupled driving unit and generating unit of an aircraft generating system has primary pump cooling and lubricating functions during productive rotating electrical power generation, and cooling friction and windage cooling function and a residual lubrication function is used for critical rotating components, during a fault mode of electrical non-power output production in the generator. This is provided in order to retard or eliminate damage and destruction of the coupled driving and generator units during an extended interim without power output of a failed generator unit, such as when its primary cooling and lubricating components have ceased to function.

Abstract: An electrical multipole machine comprises a first machine section (1), a second machine section (3) and a machine shaft (5), about which one machine section is rotatable relative to the other machine section. The first machine section comprises an annular permanent-magnet body (11) having a plurality of adjacent pole pairs (N; S). The second machine section comprises a lamination assembly (25) having teeth (27-35) and coils (37-45). The teeth comprise tooth surfaces (47-55) which are geometrically spaced from one another by slots (57-65) and from the magnet body by an air gap (67). Near the air gap the slots extend in a tangential direction over at least 80 electrical degrees and at the most 90 electrical degrees, or over at least 130 electrical degrees and at the most 150 electrical degrees. The ratio between the number of poles and the number of teeth is either 4:3 or 2:3.

Abstract: A brushless motor is disclosed, in which an armature core is secured to a frame through vibration isolating members by a clamping member having an interval regulator regulating so that the vibration isolating members are held within a regulated thickness determined by the interval regulator.

Abstract: A small-sized electric motor which comprises a gear case having an end bracket, a holder base, a pair of plate terminals, a sealing member, a terminal container part provided with a projection having a tapered face, and a container cover provided with a projection having as tapered face forming a lower pair with the tapered face of the projection of said terminal container part. This motor has an excellent waterproof property because the end bracket is contact with the plate terminals very closely through the sealing member by the action of the lower pair.

Abstract: An excitation-type AC generator having stator and field coils cooled by a fluid passing through passageways within the rotating shaft of the rotor. The fluid, either engine oil or outside air, is drawn into a hole in the end of the rotating shaft, transported axially through a passageway in the shaft, then forced radially outward through channels in the rotating shaft into the areas surrounding the field and stator coils, absorbing the heat generated and eliminating any need for an externally mounted centrifugal fan.

Abstract: To replace a diode assembly in a brushless dynamo electric machine without removal of the rotor or separation of the housing along a split line, a sealed cap is located at a position near the end of the hollow rotor. The parts for maintaining the diode housing in operation position can all be slidably removed for permitting each removal and replacement of the diode housing.

Abstract: A DC dynamoelectric machine with interpoles between field poles operable in sparkles even under heavy operating conditions comprising a solid soft iron magnetic flux bypassing members, each disposed between respective field poles and interpoles at their ends near its armature with an air gap between the field pole for controlling interpole magnetic flux, the solid soft iron magnetic flux bypassing member suppresses sudden change of magnetic flux flowing therethough by permitting flow of eddy current therethrough and maintains the interpole magnetic flux at a desired amount even during a sudden change of load current.