Abstract: A disk drive motor having a low profile construction and a gas-lubricated deflecting pad support usable in the disk drive motor and elsewhere includes a cup-shaped rotor having an integral cylindrical portion extending from the base of the cup; the cylindrical extension may be a shaft or a large hollow extension which encloses the stator windings. The stator can be conventional or can have a closed end and/or a cup-like portion to simplify construction and eliminate the need for a seal. A support mounted on the stator or the rotor supports the rotor for rotation relative to the stator. The support can be a deflecting pad support such as a deflecting pad hydrodynamic bearing or the plane or gas-lubricated deflecting pad support disclosed herein.The gas-lubricated deflecting pad support member includes bearing pads and a support structure which supports the bearings for strictly radial movement. A contoured surface is formed on the pad surfaces or a support surface opposing the pad surfaces or both.

Abstract: A rotating rectifier assembly has a substrate which has a metal core and a ceramic coating. An exciter rotor which produces an ac signal and the rectifier assembly are disposed about a generator shaft. The substrate has rectifiers arranged in a rectifying circuit. An ac lead extends from the ac windings in the exciter rotor to the rectifying circuit where a dc signal is generated and fed to a main generator rotor.

Abstract: A shaft and a substrate having mating beveled sections for improved heat transfer therebetween. A shaft having a first section, a second section and a beveled section, between the first and second sections such that the second section has a smaller outer diameter than the first section, is provided for rotation within a generator. A substrate having power and heat generating components mounted thereon and a beveled inner radial surface is mounted on the shaft such that a beveled inner radial surface mates with the beveled section of the shaft to provide greater surface area where the substrate and shaft interface, so as to improve heat transfer therebetween as compared to a shaft having a diameter along its entire length equal to the second section and to permit an adjustably tighter fight. The second section of the shaft is threaded to receive a hold-down collar having a threaded inner radial surface for securing the substrate in position.

Abstract: The high cost of fabricating a rotating rectifier assembly may be reduced in a construction including first and second tubular, generally cylindrical housing sections (12), (14), of insulating material in end to end abutment. Each of the sections (12), (14), has an interior wall (28), (40) including an elongated, inverted T-shaped slot (60) with the slot (60) in one of the sections (12) being circumferentially spaced from the slot (60) and the other of the sections (14) by about 180 degrees. Elongated buses (70) are located in the widest part of each of the slots (60) and each includes plural packaged diode mounting apertures (72). Packaged diodes 74 have combination terminal/mounting posts (76) located in a corresponding aperture (72) and further include an opposite terminal (80) extending to the interior wall (28), (40) opposite the corresponding slot (60). Fasteners (78) within the slots (60) secure the combination terminal/mounting posts (76) to the corresponding bus (70) in electrical contact therewith.

Abstract: A domestic vibration apparatus, in particular a dry-shaver or hair trimmer, in which rotary movements of a two-pole permanent magnet (9) forming a rotor are converted into vibratory movements of a vibration tool by means of a lever system (13) which preloads the drive in such a way that the rotor (9) can oscillate about a rest position,t he two-pole permanent-magnet rotor (9) without pole-pieces being arranged in the U-shaped stator of a single-phase synchronous motor.

Abstract: A rotor (32) is constructed by arranging unitary rotor elements (34a, 34b) in a longitudinal direction thereof, and has a structure such that the angular position of each group of elements is shifted by an angle corresponding to a half wave of a slot ripple caused by the rotor in the prior art. Because the difference between the angular positions is generally small, and the rotor must be exactly constructed, rotor core elements (36a) and permanent magnet elements (38a) of each unitary rotor element (34a, 34b) are shifted in the longitudinal direction of the rotor (32) to form projections and recesses (54, 56) at the ends of each unitary rotor element (34a, 34b), and the ends of each unitary rotor element are held exactly in position by metal end plates (42a, 42b, 44a, 44b), formed by a mechanical press, having recessed portions (48) and projecting portions (46) which engage with the projections and recesses.

Abstract: A motor for a disc drive unit is spatially separated from an enclosure housing the magnetic disks and read-write heads. The disks are mounted on a hub that is fixed to a shaft extending through the hub, having bearings at either end of the shaft. One end of the shaft extends outside of the enclosure, the rotor of the motor is fixed to this end of the shaft and is concentric therewith. The rotor has a rotor housing that is cup-shaped, with an opening facing away from the interior of the enclosure. Inwardly of the rotor housing is a stator mounted on a supporting member. The supporting member is detachably mounted to the enclosure for easy access to the stator. Further, a circuit board having control elements for the motor, including a Hall element mounted thereon, is provided on the supporting member for easy access to the circuit board.

Abstract: A direct current motor assembly for connection to an alternating current power supply to drive an appliance. The assembly includes a tubular housing with an armature having windings positioned inside the housing. End closures are provided for both ends of the housing, with one of the closures having an aperture in which the body portion of a rectifier assembly is mounted. The rectifier assembly includes a pair of input terminals extending outside of the housing and a pair of output terminals positioned inside the housing so that direct current may be provided to the armature without any discrete electrical conductors extending through either the end closures or the housing.

Abstract: In a coreless coil type cylindrical air gap dc motor, a ring flange is provided. Connections to the coil are formed in the ring flange by conductor paths in the form of stamped metal strips lying in a plane. The conductor paths in turn have connecting tongues which are directed radially with respect to the ring flange.

Abstract: A motor includes a main frame with a stator unit and a rotor unit mounted within the frame. The frame extends axially from one end of the stator unit to form a compartment having an outer cylindrical wall. Power control components within the compartment are interconnected to each other and to the motor windings and incoming power and control cables within the compartment. An end cap closes the compartment. The cap includes a central opening. A door is releasably secured within the opening, with an electronic control module having heat sensitive elements secured to the inner wall of the door. The door is of cast aluminum having an inner mounting plate overlapping the opening and an integral decorative plate extended through the opening. The outer face of the decorative plate is recessed to define a logo or the like and increase the heat dissipation surface. The door and module have abutting inner planar surfaces for transfer of heat from the sensitive elements through the door to the surrounding environment.

Abstract: A stepper motor in which the end portions of each of a pair of conductors are connected to their corresponding terminal processing units arranged in one array in the circumferential direction outside of stator units. The terminal processing units are integral with bobbins on which the conductor is wound in the stepper motor.

Abstract: A submersible motor includes a stator section along the entire length of rotor sections attached to the motor shaft, and a non-magnetic rotor bearing and sleeve assembly between each rotor section, with the rotor bearing being releasable but normally interconnected with the stator to prevent its rotation relative to the sleeve which rotates with the motor shaft.

Abstract: A bearing lubrication system having an exterior bearing cap circumscribing a motor shaft and having an annular recess with an axially extending depth, divided into first and second arcuate portions in the recess, forming lubrication inlet and outlet pockets in the recess, with the inlet and outlet pockets separated by axially extending walls, each wall having a height less than the depth of the recess for permitting grease to flow from the inlet pocket to the outlet pocket. The recess further has a sloped surface on an inner circumferential wall thereof to direct grease towards an adjacent antifriction bearing. A grease metering shield in the form of a solid or perforated annular plate adjacent the bearing directs grease to the contact region between the inner race and the rolling elements of the bearing.

Abstract: The problem of assembling and maintaining good electrical contact in a rotating rectifier assembly (40) is solved using deformable connectors (66). The rectifier assembly (40) includes three planar disks (48) which are linearly aligned and spaced along an axis (42). Six diode wafers (58) are arranged in two parallel planes which are parallel to the axis (42). The three diodes (58) in each plane are positioned on one of the oppositely directed planar faces (50, 52) of the disks (48). The three diodes (58) in each plane are connected by a copper connector bar (46) which forms an output. The assembly is surrounded by an insulating sleeve (62), and three deformable spring rings (66) are used to provide an interference fit.

Abstract: A homopolar, transverse pole rotor (14) having a central cylindrical body (24) with a set of circumferentially spaced, axially extending salient poles (28) at each end thereof, is constructed to reduce windage losses. Integral shrouds (29, 31) are placed on either side of each set of salient poles, and a relief is machined into the outer surface of each shroud to form an accentuated pole tip (64) which ensures magnetic centering of the rotor. To further minimize windage losses, the diameter of the central cylindrical body (24) can be reduced, and non-magnetic material can be secured within interpole recesses. Mechanical fasteners (66), dove tails (72) or tensioned circumferential banding (82) can be used to secure the non-magnetic interpole pieces to the rotor.

Abstract: An electric motor comprising a stator having radially inwardly extending circumferentially spaced polar segments and a plastic support on each axial end of the stator. Each support has substantially the same configuration as the cross sectional configuration of the ends of the stator, including segments overlying the segments of the stator. Each segment includes an axially outwardly extending wall, and a coil is wound around each stator segment and segment of said support. Integral strain relief portions are provided on each support for connecting the coils and for connecting power leads to the ends.

Abstract: In a planar linear pulse motor, the relative movement between the stator and the armature is positively restricted when no electric current is supplied to the drive coils by means of a lock member provided on either the armature or the stator. This lock member is attracted to a permanent magnet by its biasing magentic flux so as to be brought into contact with whichever of the armature or stator does not have the lock member on it. As a result, the armature may be locked up without consuming any electric power. If the lock member is attached to the stator or armature by means of an elastic member, the vertical dimension of the member attaching the lock member to the stator or armature can be reduced. Furthermore, the mechanical strength and the security of the engagement of the lock member to the stator or armature can be increased. As a result, the planar linear pulse motor disclosed is compact and highly reliable.

Abstract: An apparatus for cancellation of vibrations in a device. A first matrix (51) combines the vibration signals from a plurality of locations to produce mode signals indicative of individual modes of vibration of said device. An adaptive element in response to said mode signals generates mode vibration attenuation signals corresponding to said mode signals. A second matrix (56) combines the mode vibration attenuation signals to produce vibration attenuation signals for generating vibration attenuation forces.

Abstract: A spindle motor comprising a stator including a support shaft positioned on a base, a cap-shaped rotor rotatably and concentrically disposed around the support shaft, thrust and radial bearings disposed between the stator and the rotor, a stator coil secured to the stator, and a rotor magnet member secured to the rotor opposing the stator coil. The thrust and radial bearings are hydrodynamic bearings. A movable piece that constitutes a part of the thrust bearing is secured to the lower end of a cylindrical portion of the rotor and extended outwardly or inwardly from the cylindrical portion, or is disposed above the rotor. The stator coil is secured to the outer peripheral portion of the support shaft above or below the radial bearing. The rotor magnet member is securd to the inner peripheral surface or inner top surface of the rotor. Either a radial or axial gap is provided between the stator coil and the rotor magnet member.

Abstract: A method of trapping a piece in a void formed between two machine parts of refrigeration system compressor so as to restrain a motor lead. The method comprises the steps of placing the piece in a portion of the void formed by a first machine part, completing the void by engaging a second machine part to the first machine part thereby trapping the piece, and attaching a motor lead to an external restraint portion of the piece.