Abstract: A motor having a housing, an axle fastened to the housing, a rotation sleeve inserted with a space around the axle to form a dynamic pressure air bearing together with the axle, a magnet fastened to the rotation sleeve, and a stator core fastened to the housing and positioned so that a thrust bearing functions by magnetic attraction force generated between the stator core and the magnet. The stator core includes a protruding portion formed on a surface of the stator core facing magnet; the protruding portion is positioned so that a center line of the protruding portion is shifted from a center line of the stator core, the center line of the protruding portion being shifted from the center line of the stator core in the opposite direction to the gravitational force on the rotation sleeve.

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 reaction containment drive apparatus for a power tool includes a motor having an outside case free to rotate within the tool casing, and an internal drive shaft. A planetary gear set is an integral portion of the drive. It has three parts, namely, a central sun gear part, a middle planet gear part (the planet gear part having a planet carrier and preferably three planet gears on the planet carrier), and an outside ring gear part coaxial with the sun gear part and the planet carrier. The planet gear part is rotatable between the sun gear part and the ring gear part.

Abstract: Apparatus to replace a starter solenoid unit of a starter motor assembly, in which the original solenoid unit is mounted into an open-ended lever housing cap by crimps includes drilling into the crimps to form substantially circular holes in the lever housing cap proximate the open end, which align with outwardly open threaded ports in the replacement starter solenoid. Screws are then inserted through the lever housing cap and fastened into the threaded ports of the replacement solenoid. Clamp washers may also be used.

Abstract: A modular motor end dome for an industrial electric fan motor has a motor capacitor, and is provided on the rear end with a protective axial cavity in which may be seated the threaded mounting stem and attachment nut of an internally mounted pull chain electric motor control switch. Alternatively, an external 2-speed electric motor control switch can be employed with the modular motor end dome and with a drop cord connecting the external 2-speed electric motor control switch to the motor capacitor mounted in the modular motor end dome, and with the drop cord entering the modular motor end dome through the protective axial cavity.

Abstract: A disk drive actuator includes automatic eddy-current braking capability, enhanced by simple modifications of coil-mount structure, such as a split damping ring and spaced-rib array to produce intentional eddy current drag at unacceptably high actuation speeds, e.g., above 75 ips.

Abstract: A brushless dc permanent magnet motor drives an autonomous underwater vehe. In one embodiment, the motor comprises four substantially flat stators in stacked relationship, with pairs of the stators axially spaced, each of the stators comprising a tape-wound stator coil, and first and second substantially flat rotors disposed between the spaced pairs of stators. Each of the rotors includes an annular array of permanent magnets embedded therein. A first shaft is connected to the first rotor and a second, concentric shaft is connected to the second rotor, and a drive unit causes rotation of the two shafts in opposite directions. The second shaft comprises a hollow tube having a central bore in which the first shaft is disposed. Two different sets of bearings support the first and second shafts. In another embodiment, the motor comprises two ironless stators and pairs of rotors mounted on opposite sides of the stators and driven by counterrotating shafts.

Abstract: An electromagnetic actuator for a valve stem comprising a stator core having concentratedly wound coils around salient poles and the stator is positioned outside of a tubular member made of a nonmagnetic material. The electromagnetic actuator for a valve stem also has a rotor provided inside the tubular member for driving a threaded operating shaft such that it operats an objective member reciprocally an electromagnetic actuator for a valve stem is further constructed such that permanent magnets, alternately magnetized into a number of pole-pairs, are arranged along the surface of each salient pole of the stator core at a constant pitch, while a number of induction teeth are formed along the circumference of the rotor at a pitch equal to the pitch of the pole-pairs of the permanent magnets. The difference between the total number of the induction teeth and the total number of the polepairs of the permanent magnets is made equal to an even number.

Abstract: Miswiring of a multivoltage compressor motor is prevented by the use of a phase barrier having integral jumper bars for connecting pins in the correct pattern for the chosen voltage. The phase barrier for the chosen voltage is placed on the pins extending from a terminal plate and the appropriate connections to the power source are made.

Abstract: Modular coil cores for an electric motor eliminate tedious coil winding on pole members by making either the pole caps or the complete pole members of the stator yoke engageable with and disengageable from the stator yoke itself.

Abstract: A method of manufacturing fractional horsepower motors involves using each stator to customize the length of a rotor/shaft to match the thickness of the specific stator with which it will be used. This is accomplished by providing a fixture which receives the stator in a gauging position. The rotor/shaft, with a compressible member thereon, is placed on the fixture which is then closed over a distance fixed by the gage formed by the stator. As the fixture closes, a compressible member is compressed to exactly fit the length of the rotor/shaft assembly to the stator thickness. The compressible member is a preferably nylon or metal plug which is pushed into a metal cup and mounted at the end of the rotor as the fixture closes.

Abstract: A drive system for a pump/compressor which feeds a pneumatic circuit of a portable waste water sampling device, and comprising individual electric motors (20) each operating at 12 volts and drawing a current no greater the 350 mA at 2.5 w, the motors driving a common pinion (23) with an output shaft (24) for connection to the pump/compressor. The use of a number of low capacity drive motors, which together provide sufficient torque to drive the pump/compressor, avoids the danger of spark generation, particularly in a potentially explosive environment such as may be found below ground. Since the motors are small they may be mounted conveniently within the sampling equipment, taking up no more space than would be occupied by a single motor of larger capacity.

Abstract: A construction of an electric induction motor having a stacked stator core (10) arranged around the outer circumference of a rotatable rotor (12) via an annular air gap (14), front and rear housings (20 and 22) arranged at front and rear ends of the stator core (10) and supporting the rotatable rotor (121) via rotary bearings (24 and 26), and mounting legs (28) separate from the front and rear housings (20 and 22). The stacked stator core (10) is formed, at a periphery, with through-bores (32) permitting tie-bolts (30) to pass therethrough, to thereby combine the front and rear housings (20 and 22) and the stator core (10) together as one body. The separately formed mounting legs (28) are fixed to the front and rear housings (20 and 22) by bolts.

Abstract: A multipolar rotor of an electric machine, essentially in the form of a circular cylinder, comprising an even number of pole magnets (1), which is equal to at least four, said pole magnets (1) being arranged uniformly along a circle and interpole magnets (2) adjacent thereto. The pole magnets (2) form, in combination, a cylindrical surface of the rotor. The pole magnets (1) are magnetized parallel to their planes (5) of symmetry, while the interpole magnets (2) are magnetized normal to their planes (6) of symmetry.

Abstract: A motor includes a round tubular steel frame with a stator unit fixedly mounted therein and spaced from the frame ends. Spaced bearing frames are secured within the round frame and support a rotor unit within the stator unit and in the bearing frames. One or both bearing frames are spaced from the round frame ends, and define corresponding auxiliary compartments. In a motor pump unit, an end plate closes one end and defines a control compartment. The pump housing closes the opposite end and forms a fan and drip compartment within the round frame. The round frame has openings in the drip compartment to by-pass pump water leakage from the motor compartment. A fan in the fan compartment provides motor cooling. Motor controls such as power connectors, a centrifugal start switch unit, electronic timers, and the like are mounted within the control compartment to form a self-contained motor.

Abstract: A dynamoelectric machine having a large magnetic gap between the rotor and the stator includes a slotless stator windings located within the large magnetic gap, and a mgnetic assembly consisting of radially aligned permanent magnets separated by non-magnetic material. The magnetic pole circumferential length and the radial gap length are proportioned such that the permanent magnets are operated at or near their maximum energy product.

Abstract: The commutating poles of vehicular-type dc motors, for example for trolley buses or trolley cars, are made by winding, on edge, a copper strip, permitting the wound copper strip to resiliently, spring-like expand so that the individual spiral loops thereof will be slightly spaced from each other, and then exposing the copper strip in a fluidized bed to an insulating powder, for example polyethylene or polyurethane, which is subsequently cured in a hardening or sintering process.

Abstract: A gas cooling system for a bore pack exciter for a power generator in which high velocity, colder cooling gas is obtained from the region within the generator where the entering cooling gas is impelled by the generator fan, and means to direct part of that cooling gas from that flow through the bore pack exciter before return to the interior of the generator for recycling through the cooling unit.

Abstract: An oil-filled, high temperature, submergible electric pump motor comprises an unvarnished stator structure having stator windings formed of conductors coated with hydrolytically stable, oil-resistant, and abrasion-resistant insulation exposed to the oil of the motor, and preferably selected from the group consisting PEEK, PEK, and PBI. The stator windings have end turns mounted on rigid, hydrolytically stable, oil-resistant electrically insulating blocks that support the weight of the stator windings and immobilize the end turns. The end turns are attached to the blocks by hydrolytically stable, oil-resistant electrically insulating tape. Other components of the insulation system are selected for their hydrolytic stability and oil resistance, and in some instances for their non-abrasive properties.

Abstract: A linear motor-driven table apparatus capable of operating both in fine-feed mode and large-feed mode has a base, an intermediate carriage received in a longitudinal recess in the base and supported movably by linear bearings fitting on both opposing walls of the recess, and a table body received in a longitudinal recess in the intermediate carriage and movably supported through linear bearings fitting on both opposing walls of the recess. The movement of the intermediate carriage with respect to the base is effected by a first linear motor acting therebetween, while the movement of the table body with respect to the intermediate carriage is effected by a second linear motor acting therebetween. The amount of feed is controlled by controlling the supply of pulses to these linear motors.