Patents Examined by J. D. Miller
  • Submergible motor construction
    Patent number: 4456844
    Abstract: A mold type motor comprises a molded resin frame covering the surfaces of a stator iron core and a coil end and molded resin brackets detachably fitted on the end openings of the molded resin frame wherein a surge absorber unit is embedded in the molded resin frame and is electrically connected to a grounding element.
    Type: Grant
    Filed: October 27, 1983
    Date of Patent: June 26, 1984
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Sakuei Yamamoto, Mitsuhiro Nishida
  • Precision rotation mechanism
    Patent number: 4455501
    Abstract: In a precision rotation mechanism, first and second sections of a rotatable disk member are alternately rotated. The first and second sections are coupled together with an elastic hinge which is provided in the center region of the disk. The first and second sections are also coupled with piezoelectric elements. After the first section is locked by a stopper, the piezoelectric element is elongated in a direction and the piezoelectric element is contracted in a direction, whereby the second section is rotated in a direction. Then, the second section is locked by the stopper and the first section is released from the stopper. In this state, one piezoelectric element is contracted and the other piezoelectric element is elongated so that the first section is rotated.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: June 19, 1984
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Toru Tojo, Kazuyoshi Sugihara
  • Means for adjusting motor end play
    Patent number: 4455498
    Abstract: Means are disclosed for adjusting motor end play such that, despite variation from motor to motor in the distance between front and rear bearings on so-called skeleton motors, the end play can in all cases be brought to a minimum predetermined value. A lockwasher is positioned on the shaft by an arbor press that is referenced to a shoulder of the stator bearing assembly, thus compensating for length variations in stator manufacture.
    Type: Grant
    Filed: August 19, 1982
    Date of Patent: June 19, 1984
    Inventor: Richard E. DeSisto
  • Submersible motor bearing with extended sleeve
    Patent number: 4453099
    Abstract: A submersible pump electrical motor has a rotor that is divided into sections, and a bearing located between each of the sections for maintaining the shaft of the rotor in axial alignment. The bearing assembly includes a sleeve that is keyed to the shaft. A bearing has an inner portion that rotatably receives the sleeve. The bearing has a flange with a periphery that frictionally engages the stator to prevent the bearing from rotating. The sleeve physically contacts the adjacent rotor sections and transmits forces between them. Washers are located between upper and lower edges of the bearing inner portion for supporting the bearing. The washers have inner diameters that receive the sleeve, and do not carry the weight of any rotor sections located above.
    Type: Grant
    Filed: January 22, 1982
    Date of Patent: June 5, 1984
    Assignee: Hughes Tool Company
    Inventor: Bill D. Flat
  • Piezoelectric device with surface charge shunt
    Patent number: 4451753
    Abstract: A bulk wave piezoelectric device comprises a polarized ferroelectric ceramic plate, and electrodes formed on two main surfaces thereof, respectively, intersecting the polarization axis direction. The electrodes are connected to each other by means of an external resistance having a predetermined resistance value. The resistance value is selected to be smaller than the inherent resistance value of the ferroelectric ceramic plate between the two main surfaces. Positive and negative electric charges are stored on the two electrodes due to the pyroelectric effect responsive to a change of the temperature of the ferroelectric ceramic plate. The potential difference caused by the electric charges thus stored is rapidly decreased through the external resistance.
    Type: Grant
    Filed: July 15, 1980
    Date of Patent: May 29, 1984
    Inventors: Toshio Ogawa, Kikuo Wakino
  • Protective arrangement for a plug-connected electric motor sealed against pressure, vapors and radiation
    Patent number: 4451750
    Abstract: An electric motor construction comprises a housing with a motor rotor rotatably mounted in the housing with stator windings disposed in the housing around the rotor. The housing has a wall with an opening therein and a terminal box plug connector for the stator windings is mounted on the wall around the opening and includes an upper and a lower interengageable connector parts. A sealing gasket disposed between the parts which may be plug interconnected and held into position by a snap action lock. The stator windings have lead wires leading from the housing into the connector part and a continuous sealing compound resistant to humidity, vapors and gamma radiation embeds the stator windings and the lead wires and extends from the housing into the connector parts.
    Type: Grant
    Filed: January 29, 1982
    Date of Patent: May 29, 1984
    Assignee: Elektro-Mechanik GmbH
    Inventors: Dieter Heuer, Georg Schmiedke
  • Oxygen-plasma passivated and low scatter acoustic wave devices
    Patent number: 4450374
    Abstract: Passivated and low scatter acoustic wave devices comprise surface acoustic wave (SAW) and shallow bulk acoustic wave (SBAW) devices having transducers composed of oxidizable metal and layers of metal oxide on conventional acoustic wave substrates. Passivated transducers are achieved by forming a layer of oxide on an existing transducer. The method may be used to passivate a device packaged in a non-oxidizable package with oxidizable wire leads, thus combining complete protection with efficient manufacturing operations. Low scatter SAW transducers are achieved by forming the transducer and the interstitial insulating layer from a single layer of oxidizable metal by means of masking and oxidation operations.
    Type: Grant
    Filed: May 27, 1982
    Date of Patent: May 22, 1984
    Assignee: Motorola Inc.
    Inventors: Frederick Y. Cho, Fred S. Hickernell
  • Cover member for a magnetically operated clutch
    Patent number: 4449622
    Abstract: An electromagnetic clutch is disposed between a drive source and a driven device for connecting and disconnecting the drive source to and from the driven device, respectively. The electromagnetic clutch includes a body rotatable by the rotative power from the drive source and an armature faced to, but normally spaced from the rotatable body. An exciting solenoid when energized moves the armature into an engaging position where the armature is attracted and urges against an end face of the rotatable body. A bearing is disposed between a fixed member of the driven device and the inner peripheral surface of the rotatable body for rotatably supporting the rotatable body on the fixed member. A cylindrical cover member is fixedly mounted, independently of the bearing, on a portion of the inner peripheral surface of the rotatable body between an axial end face thereof and the bearing.
    Type: Grant
    Filed: May 20, 1982
    Date of Patent: May 22, 1984
    Assignee: Nippondenso Co., Ltd.
    Inventors: Reijiro Okano, Kiyoshi Usami
  • Broad band surface acoustic wave edge deposited transducer
    Patent number: 4447754
    Abstract: A broad band surface acoustic wave (SAW) device has an edge-deposited transducer (EDT) capable of frequencies in excess of 1 GHz and bandwidths in the hundreds of MHz. The device includes a transducer on a semiconductor substrate which is either non-piezoelectric or weakly piezoelectric. The substrate has a sharp, smooth edge formed by the intersection of its top and a side surface. The transducer includes a passivation layer deposited on the side surface of the substrate and a starter layer deposited on the passivation layer; an inner metallic (gold, for example) electrode deposited on the starter layer; a transducer layer deposited on the inner metallic electrode; and an outer metallic electrode deposited on the transducer layer. The outer electrode is formed on the transducer layer one-fifth wavelength below the top surface of the substrate.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: May 8, 1984
    Assignee: Texas Instruments Incorporated
    Inventor: Robert S. Wagers
  • Cordless electric device having contact increasing means
    Patent number: 4447749
    Abstract: A cordless electric tool in which a motor is mounted in a housing and to which housing a battery source is connected to operate the motor. The battery source is in the form of a battery pack that will be slide-fitted into the housing to be detachably connected thereto. The tool housing has a hollow portion or cavity which receives the battery pack. The motor has a pair of terminals which extend into the cavity to mate with co-acting battery terminals of the battery pack. Resilient means, preferrably an "O"-ring yieldably engages the motor terminals to increase the mechanical and electrical contact between the respective motor and battery terminals.
    Type: Grant
    Filed: July 29, 1981
    Date of Patent: May 8, 1984
    Assignee: Black & Decker Inc.
    Inventors: Irvin H. Reeb, Jr., Robert L. Beckhardt
  • Means for improving the operation of liquid filled electric motors
    Patent number: 4445056
    Abstract: In an electric motor operating with a liquid filled housing, friction and hydraulic losses are reduced and heat removal is improved. A first collar is mounted on the end of the stator coaxially therewith. A second collar is positioned in proximity to the first collar. An annular plate extends from the second collar and faces the end of the rotor. The plate is spaced from the end of the rotor and from the rotor shaft. The rotor has a surface opposing the annular plate. The collars and annular plate form a liquid turbulence reducing shroud for the end of said rotor. The opposing surfaces of the annular plate and rotor move liquid outwardly toward the stator bore and the collars divert the liquid down the air gap for heat removal purposes. The first collar protects the end turns of the stator from abrasion by the moving liquid.
    Type: Grant
    Filed: November 2, 1981
    Date of Patent: April 24, 1984
    Assignee: Litton Industrial Products, Inc.
    Inventor: David F. Gaylord
  • Electric starter motor with holder for permanent magnets
    Patent number: 4445060
    Abstract: The housing (2) retains six permanent magnets (3-8) which are curved and rest on the inner wall (9) of the housing (2). They are fixed and held in the circumferential position by holder parts (13; 14; 47) located by guide protrusions (11, 12) in the housing (2). The holder parts have yielding holder sections (15; 25; 49) with circumferentially extending axially springy flaps (21; 22; 29, 30) or bridge elements (48) to hold the permanent magnets (3-8) and yet permit compensation for tolerances while being resistant to vibratrion. For axial positioning, the holder parts have a spacer (23; 32) resting on the bearing cap (39).
    Type: Grant
    Filed: August 11, 1982
    Date of Patent: April 24, 1984
    Assignee: Robert Bosch GmbH
    Inventors: Walter Ruhle, Kurt Zimmerman
  • Deformable rotor for a hydroelectric machine
    Patent number: 4443727
    Abstract: The rotor forms part of a tubular turbine with a ring-shaped electrical machine. The rim of the rotor is deformed by the centrifugal forces, with large dimensions involved. Those portions of the rim which are to be circular at operating speed are, in the state of rest, produced to deviate from the circular by the amounts of deviation occurring in the rotating state relatively to the state of rest.
    Type: Grant
    Filed: June 2, 1982
    Date of Patent: April 17, 1984
    Assignee: Escher Wyss Limited
    Inventors: Heinz Annen, Friedrich Schneebeli, Helmut Pirchl
  • Tapered wave transducer
    Patent number: 4443733
    Abstract: The invention is a transducer which acts with an acoustical lens to produce a highly focussed beam and attenuated side lobe waves. The transducer comprises a resistive electrode which attentates electrical signals applied to and emanating from the peripheral region of the transducing element.
    Type: Grant
    Filed: December 24, 1981
    Date of Patent: April 17, 1984
    Inventor: Arthur J. Samodovitz
  • Shaft transducer having DC output proportional to angular velocity
    Patent number: 4443724
    Abstract: A brushless DC tachometer is disclosed that includes a high strength toroidal permanent magnet (25) for providing a uniform magnetic field in an air gap, an annular pole piece (21) opposite the magnet, and a pickup coil (19) wound around the pole piece (21) and rotating about the axis of the pole piece. The pickup coil is rotated by an input shaft (15) to which the coil (19) is coupled with a friction clip. The output of the coil (19) is conducted to circuitry (31) by a twisted wire pair (29). The input shaft (15) also activates a position transducing potentiometer (13).
    Type: Grant
    Filed: February 19, 1982
    Date of Patent: April 17, 1984
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventor: Mathias B. Handlykken
  • Piezoceramic bender element having an electrode arrangement suppressing signal development in mount region
    Patent number: 4443729
    Abstract: A piezoceramic bender element for operation in the AC generator mode below the device resonant frequency and having an electrode configuration which removes from the active electrical circuit the ends of the element where relatively high levels of mechanical stress develop.
    Type: Grant
    Filed: June 22, 1981
    Date of Patent: April 17, 1984
    Assignee: Rockwell International Corporation
    Inventor: Billie F. Rider
  • Brush lead retainer for an electrical machine
    Patent number: 4442370
    Abstract: This device is intended for the retaining brush lead connections for motor vehicle starters and is in the form of a bridging piece or retainer which includes a longitudinal hole permitting the passage of a tie element, and a groove parallel to this longitudinal hole in which are held the brush lead and a connection between windings. The bottom of this groove is formed with a resiliently deformable lip, and the device has a peripheral ring which is resiliently deformable, the deformation of the lip and of the ring during assembly ensuring effective retention, by pressure, between the brush lead and the connection.
    Type: Grant
    Filed: September 2, 1981
    Date of Patent: April 10, 1984
    Assignee: Ducellier & Cie
    Inventor: Gerard Veyssiere
  • Elastomeric member for suspending a motor while positioning its magnet
    Patent number: 4442367
    Abstract: A support for a motor wherein the motor is held on a chassis of a tape recorder or the like by the use of mounting members made of rubber or the like material, characterized in that each of the mounting members is provided with two constricted portions, one of which is inserted into a hole provided in the chassis and the other of which is inserted into a hole provided in the motor. The mounting members also position the motor with respect to the mounting holes.
    Type: Grant
    Filed: August 5, 1982
    Date of Patent: April 10, 1984
    Assignee: Alps Electric Co., Ltd.
    Inventor: Tadashi Suzuki
  • Electric indexing drive and stepping motor with drive retardation therefor
    Patent number: 4442392
    Abstract: To provide an indexed drive to a device such as a rotary switch having a detent mechanism, a three step-phase stepping motor is wound with only two of the phases (A, B) in its stator slots (S1-S24). Those slots (*) which would carry the third step-phase winding in a conventional machine are left empty. To index the drive from one detent position (I) to the next position (J), first the step-phase (A) and then the step-phase (B) are energized, to take the detent mechanism past its top dead center position (X). The drive then continues to the next position (J) under the detent force and its own inertia, while the step-phase (B) is kept energized to provide electrical retardation to prevent overshoot.
    Type: Grant
    Filed: April 28, 1982
    Date of Patent: April 10, 1984
    Assignee: Hornet Electrical Company Limited
    Inventor: Donald L. Hore
  • Switch-plug module for portable electric tool
    Patent number: 4442366
    Abstract: A portable electric tool has a housing, an electric motor energized by a trigger-actuated switch, and a receptacle recessed in the housing. Terminals of the switch are formed as plug prongs which extend outwardly directly from the switch housing into the receptacle for receiving the female connector of a power supply cable. Preferably, a second set of plug prongs extend forwardly from the switch housing and receive a female connector of a motor cable. This arrangement enables wiring connections to the switch from the supply cable to be eliminated.
    Type: Grant
    Filed: March 2, 1982
    Date of Patent: April 10, 1984
    Assignee: Black & Decker Inc.
    Inventor: Giuseppe Cuneo