Patents Examined by D. L. Rebsch
  • Patent number: 5111092
    Abstract: Two opposed poles of a permanently magnetized circuit establish a relatively large air gap. An armature element (15) is displaceably interposed in the gap between these poles. The armature element establishes a first relatively small gap to one of these poles when in a first position of adjacency to the other of these poles, and the armature element establishes a second relatively small gap to the other of said poles when in a second position of adjacency to said one pole. Pole-fringing flux is manifested laterally of that one of the relatively small gaps which uniquely identifies the instantaneous presence of the armature in one of its two positions, and a detector of fringe flux at one of the two gaps (18) provides an indication of the positional status of the armature with respect to the poles.
    Type: Grant
    Filed: March 1, 1991
    Date of Patent: May 5, 1992
    Assignee: Marotta Scientific Controls, Inc.
    Inventor: Robert H. Reinicke
  • Patent number: 5107155
    Abstract: A small dc vibrator motor for use in a wireless alerting device includes a housing, a non-rotatable shaft fixed to the housing, a cylindrical magnet fixedly mounted on the shaft, and a rotor which is rotatably mounted on the shaft. The rotor includes a cylindrical coreless winding assembly between the magnet and the housing, and eccentric bearings, or combinations of concentric bearings and eccentric weights, on both ends of the winding assembly. The eccentric bearings, or the combinations of concentric bearings and eccentric weights, cause vibrations when the rotor rotates.
    Type: Grant
    Filed: June 5, 1991
    Date of Patent: April 21, 1992
    Assignee: Tokyo Parts Industrial Co., Ltd.
    Inventor: Tadao Yamaguchi
  • Patent number: 5107161
    Abstract: A process for the formation of a force field comprising cooling at least one crystal selected from potassium tartrate, cesium nitrate, rubidium nitrate, tartaric acid, cadmium nitrate and thorium nitrate to a temperature below about 110K. The force field comprises an electric field and a mass attraction field which maintains its intensity over long time periods. A method is also provided for establishing a force field at a location remote from the cooled crystal by means of an electrical connection to the cooled crystal by an insulated electrical conductor. The invention includes a device for forming the force field.
    Type: Grant
    Filed: August 16, 1990
    Date of Patent: April 21, 1992
    Assignee: State University of New York
    Inventor: James D. Brownridge
  • Patent number: 5107158
    Abstract: An apparatus which may be used to drivingly engage a rotating shaft, reduce the effect of the diametral runout thereof and drive a rotary sensor, including a sleeve placed coaxially about the shaft, drivingly engaging the shaft by means of mating splines. Any diametral runout (eccentric or displaced rotation) present in the shaft is directly imparted to the driven end of the sleeve. A spherical annular protrusion extends radially outwardly from the sleeve and slidingly engages a bore having a central axis coincident with the preferred axis of rotation. In this manner, the center of the spherical annular protrusion, and consequently that portion of the sleeve, is maintained coincident with the preferred axis of rotation. The opposing end of the sleeve drivingly engages a rotary sensor with mating splines. If diametral runout is present in the rotating shaft, the sleeve will gimble about the center point of the spherical annular protrusion 30.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: April 21, 1992
    Assignee: Rockwell International Corporation
    Inventor: David E. Peck
  • Patent number: 5107160
    Abstract: An electrical commutator of the type which is formed by bending a strip of conducting material having outwardly extending and spaced apart tangs along one side into a cylindrical sleeve so that the tangs extend outwardly from one axial end of the sleeve. The strip includes at least one, and preferably two, recessed portions in the space between adjacent tangs so that these recessed portions protrude radially inwardly once the strip is formed into the cylindrical sleeve. Anchoring portions on the inner surface of the sleeve, as well as the recessed portions, are then encapsulated in an insulating material, such as phenolic resin. Thereafter, axially extending and circumferentially spaced slots are machined in the outer periphery of the sleeve and these slots extend to a midpoint in the space between adjacent tangs.
    Type: Grant
    Filed: March 19, 1990
    Date of Patent: April 21, 1992
    Assignee: Toledo Commutator Co.
    Inventor: Dale Langdon
  • Patent number: 5105113
    Abstract: A permanent-magnetic motor employs a skew structure in an armature iron core and an equal gap structure. A center line of a permanent magnet field pole is disposed to be shifted against a mechanical center line of the motor or a center line of the iron core. The magnet field pole is made to have an unequal pitch. A cogging torque generated at both end extending portions in the magnets is cancelled out. The cogging torque of the permanent-magnetic motor in power steering assistance such as for the automobile yields a smooth steering feeling sensitivity during the operation of the automobile.
    Type: Grant
    Filed: August 2, 1990
    Date of Patent: April 14, 1992
    Assignees: Hitachi, Ltd., Hitachi Automotive Engineering, Ltd.
    Inventors: Hisatugu Ishikura, Seiji Yamashita
  • Patent number: 5102061
    Abstract: The brushless signal transmitting device comprises a rotor; a fixed housing for rotatably supporting the rotor; at least one gear in mesh between the rotor and the fixed housing; an intermediate member disposed between the rotor and the fixed housing and rotatable in synchronism with and in the same direction as the rotor at a predetermined speed reduction ratio via the gear; a guide roller supported on the intermediate member; and a flexible wiring member connected between the rotor and the fixed housing. The wiring member is wound up around the rotor counterclockwise, for instance, and then returned via the guide roller so as to be wound up around the intermediate member clockwise. Since the intermediate member is larger in diameter but smaller in rotative speed than that of the rotor, it is possible to reduce the length of the flexible wiring member required to rotate the rotor by a predetermined number of revolutions of the rotor.
    Type: Grant
    Filed: February 21, 1991
    Date of Patent: April 7, 1992
    Assignee: Yazaki Corporation
    Inventors: Nobuhiko Suzuki, Itsuo Takayanagi, Hiromi Masuda
  • Patent number: 5103125
    Abstract: An adapter for a mechanical throttle control to provide electrical signals to an electronic control for an engine. A mechanical vernier throttle control unit for converting rotational motion to linear motion is coupled directly to a potentiometer, the tap output of which is connected to the electronic control. Linear motion of the control unit is directly imparted to the potentiometer to provide engine speed signals to the engine through the electronic control module.
    Type: Grant
    Filed: July 28, 1989
    Date of Patent: April 7, 1992
    Inventor: Ronald H. Ogden
  • Patent number: 5103127
    Abstract: A mechanization of a vehicular starter/generator machine having minimal impact on the vehicle powertrain. The powertrain includes an engine connected to drive the vehicle through a fluid torque converter and a power transmission. The rotor of the starter/generator machine is formed on the outer circumference of an input shell of the torque converter, and the stator of the machine is formed on the inner circumference of the torque converter housing. This mechanization affords the use of a relatively high capacity machine without appreciably affecting the powertrain packaging.
    Type: Grant
    Filed: February 25, 1991
    Date of Patent: April 7, 1992
    Assignee: General Motors Corporation
    Inventor: David A. Peter
  • Patent number: 5103126
    Abstract: A structure which is of the utmost simplicity, rigidity and reliability has a transmission arrangement (1) for converting the rotary movement of a motor into a linear movement of a driven body (21) along a curved path. It is of a configuration that includes a stationarily arranged spindle (2) which is curved to correspond to the shape of the curved path, and at least one thread counterpart portion (4) which is engaged with the thread of the curved spindle and which is rotatable about the spindle, and by virtue of that rotary movement, displaceable in the longitudinal direction of the spindle. The stator (14) of the motor is connected to the driven body and is mounted non-rotatably and longitudinally displaceably with respect to the curved spindle, and the rotor (5, 15) of the motor is non-rotatably connected to the thread counterpart portion.
    Type: Grant
    Filed: January 9, 1991
    Date of Patent: April 7, 1992
    Inventor: Walter Mehnert
  • Patent number: 5101128
    Abstract: Both a closed system and method for cooling a submersible propulsor unit for a water vehicle is provided for a unit of the type that includes a submersible motor having a shaft connected to a propeller, and a housing containing the motor. The system comprises a motor cooling assembly that includes a shaft seal for conducting the shaft outside of the housing while preventing ambient water from entering the housing, a liquid contained within the housing for cooling the motor, a heat exchanger for thermally connecting but mechanically isolating the liquid from the ambient water, an impeller (102) for recirculating the liquid through both the motor and the heat exchanger, and a bellows (128) for equilibrating any pressure differentials between the cooling liquid and the ambient water. A filter assembly (129) mounted within the bellows relieves any pressure differential that is not relieved by the bellows when ambient water pressure is greater than that of the cooling liquid in the housing.
    Type: Grant
    Filed: August 23, 1990
    Date of Patent: March 31, 1992
    Assignee: Westinghouse Electric Corp.
    Inventors: Luciano Veronesi, James A. Drake
  • Patent number: 5099161
    Abstract: A compact electrically driven linear actuator having an electric motor in a housing. The electric motor has a cylindrically-shaped rotor assembly which is attached to and circumscribes a threaded spindle. A portion of the threaded spindle is received in an axial bore of a non-rotatable extendable arm. A nut attached to one end of the non-rotatable extendable arm is threadably received on the threaded spindle. Rotation of the threaded spindle by the electric motor linearly displaces the nut and the non-rotatable extendable arm along the length of the threaded spindle. In the preferred embodiment, the threaded spindle has a helical ball groove and the nut is a mating ball nut.
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: March 24, 1992
    Assignee: Savair Inc.
    Inventor: Michael H. Wolfbauer, III
  • Patent number: 5099164
    Abstract: A unitary end bell 66 includes a body 90 and a bridging section 92, and is assembled with a lamination stack 74 in the formation of a stator subassembly 150. End bell 66 is formed with base surfaces 118 at one end which insulate adjacent portions of lamination stack 74 from coil windings 152, and is further formed with wire-retaining shrouds 110 which retain coil windings 152 in a wound configuration. Bridging section 92, which straddles the other end of body 90, is formed with brush channels 120 for supporting brush boxes and a bearing nest 138 for supporting an armature bearing.Methods of assembling the elements to form stator subassembly 150, and various assembly aids such as shroud support 168 and pallet 212 are also disclosed.
    Type: Grant
    Filed: November 28, 1989
    Date of Patent: March 24, 1992
    Assignee: Black & Decker Inc.
    Inventor: Dale K. Wheeler
  • Patent number: 5097169
    Abstract: A brushless alternator for a vehicle comprising a field coil holding device formed by mounting a field coil winding spool directly on a field core using a bonding agent thus eliminating the need for a metallic cylindrical spool holder which requires precise machining in order to engage with the field core for welding. With this arrangement, a simple and inexpensive field coil holding device eliminates former precise machining. In addition, a field coil can be wound around the field coil winding spool in advance, before bonding to the field core.
    Type: Grant
    Filed: November 8, 1989
    Date of Patent: March 17, 1992
    Assignee: Mitsubishi Denki K.K.
    Inventor: Sumio Fukushima
  • Patent number: 5097165
    Abstract: An ac generator system for a motor vehicle has a first voltage generating device (115-119) for producing a first output voltage and a second voltage generator device (105-109) for producing a second voltage, the second voltage being a higher voltage than the first voltage, the second voltage being electrically floating. In one embodiment the first and second voltage generating devices comprise an armature winding within which is rotatably mounted a respective field winding and a rectifier for producing a dc voltage from at least one of the armature windings. In another embodiment the second voltage device is a transformer and in a third embodiment the second voltage device is formed by a transformer and a pulse width modulator. In a fourth embodiment the second voltage device is formed by an inverter and in a fifth embodiment two armature windings are provided about a common field winding.
    Type: Grant
    Filed: October 23, 1990
    Date of Patent: March 17, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Keiichi Mashino, Akihiro Saito, Masayoshi Tashiro
  • Patent number: 5095238
    Abstract: A brushless dc motor comprising a stator, and a rotor incorporating a hollow cylindrical permanent magnet. The rotor magnet has sectors magnetized radially in opposite directions to define poles of opposite polarity extending around the circumference of the magnet. The magnet is completely magnetized so as to leave no non-magnetized sectors between the poles of the magnet. The magnet has grooves in its surface facing the stator, the grooves extending in the longitudinal direction of the magnet. Each groove is offset from, or non-symmetrical with respect to, the center of the rotor pole in which it is located.
    Type: Grant
    Filed: April 3, 1990
    Date of Patent: March 10, 1992
    Assignee: Minebea Co., Ltd.
    Inventors: Yuzuru Suzuki, Sakae Fujitani, Hitoshi Takahashi
  • Patent number: 5095237
    Abstract: A rotary electrical machine comprises a rotor assembly and a stator assembly separated by an air gap. The stator is formed from discrete generally pie-shaped pole pieces having a progressively increasing radial slot to accommodate winding of the coil. The pole pieces are preferably wound from a grain oriented ferromagnetic tape to improve the permeability of the pole and its saturation level. Groups of poles may be separated into sectors. In an alternative embodiment, at least some of the pole pieces are formed from both a permanent magnet and ferromagnetic tape to provide a constant bias between the rotor and stator assemblies.
    Type: Grant
    Filed: January 10, 1991
    Date of Patent: March 10, 1992
    Assignee: Nova Corporation of Alberta
    Inventors: Theodor Bardas, Gordon Brailean, Timothy A. Harris, Vaclav Kulle, Cal Oleksuk
  • Patent number: 5093593
    Abstract: A dc permanent magnet motor for a surgical handpiece, comprises a housing and a stator including windings fixed in the housing. A rotor is supported for rotation in the housing and has a forward extending rotatable shaft. A conventional sensor adjacent the windings and rotor has stiff conductive electrodes extending rearward. A printed circuit board disk has plural axial holes along the perimeter thereof defining conductive sockets into which the electrodes plug, which disk is located coaxially rearward of said rotor and windings and is fixed with respect to the housing. A rear-facing, separable connector holder behind the printed circuit board has terminals rear-facing therefrom for connection to an external electrical supply. The holder is fixed with respect to the housing. Electrical connections are effected between the conductive sockets of the printed circuit board and the rear-facing terminals of the holder.
    Type: Grant
    Filed: December 18, 1990
    Date of Patent: March 3, 1992
    Assignee: Stryker Corporation
    Inventor: Christopher D. Philipp
  • Patent number: 5093594
    Abstract: A microfabricated, harmonic side-drive "wobble" type micromotor exhibiting increased torque output without the need for air levitation or for insulation on the rotor. Stator pieces are arranged about a circular space. In the center of that space is a bearing. An annular rotor in the space, about the bearing, has an inner surface always in rolling contact with the bearing. The outer surface of the rotor is separated from the stator by an air gap.
    Type: Grant
    Filed: June 22, 1990
    Date of Patent: March 3, 1992
    Assignee: Massachusetts Institute of Technology
    Inventor: Mehran Mehregany
  • Patent number: 5089734
    Abstract: A generator includes a rotatable housing carrying permanent magnets for creating a magnetic field, an armature carrying electrical coils and a gear set for simultaneously rotating the housing and magnetic-field-creating permanent magnets in a direction opposite to the direction of rotation of the armature coils. The armature or field can be rotated separately by a clutch or transmission.
    Type: Grant
    Filed: November 26, 1990
    Date of Patent: February 18, 1992
    Inventor: Ramsingh Bickraj