Patents Represented by Attorney Walter R. Thiel
  • Patent number: 4827097
    Abstract: A combined transformer and motor having a continuously energized primary winding producing a continuous output voltage from a transformer winding and a selectively enabled motor shaft rotational output which is selectively actuated by powering a further primary winding.
    Type: Grant
    Filed: May 7, 1986
    Date of Patent: May 2, 1989
    Assignee: Litton Systems, Inc.
    Inventor: Jeffrey K. Cornell
  • Patent number: 4757171
    Abstract: A combined transformer and motor having a continuously energized primary winding producing a continuous output voltage from a transformer winding and a selectively enabled motor shaft rotational output which is selectively actuated by powering a further primary winding.
    Type: Grant
    Filed: June 30, 1987
    Date of Patent: July 12, 1988
    Assignee: Litton Systems, Inc.
    Inventor: Jeffrey K. Cornell
  • Patent number: 4745250
    Abstract: An interlock switch assembly is disclosed having a unitary baseplate with relatively few moving parts and making use of conventional low cost miniature switches, each positively located and retained with respect to the baseplate. First and second actuators convert, respectively, linear motion of first and second operators into rotary motion to actuate the miniature switches. Switch actuation is prevented unless the properly timed motion of both operators is received by the actuators. A third actuator receives the motion of the first operator and actuates a third switch in response thereto. In one embodiment, the third actuator is prevented from actuating the third switch until after actuation of the first and second switches. In one embodiment, a primary interlock switch is the first switch deactuated and is preferably capable of interrupting power to the microwave energy source when the door is opened before the cooking cycle is completed.
    Type: Grant
    Filed: April 27, 1987
    Date of Patent: May 17, 1988
    Assignee: Litton Systems, Inc.
    Inventor: Stephen K. Mayo
  • Patent number: 4711982
    Abstract: A microwave oven door is disclosed having a channel cross-section and formed of plastic material having a microwave impermeable viewing window, hinge means, door securing means, and a microwave impermeable coating in the channel cross-section area. An alternative embodiment has the channel cross-section area formed of a plastic filled with a microwave blocking material. A further embodiment has a microwave impermeable opaque surface in place of the viewing window.
    Type: Grant
    Filed: May 30, 1986
    Date of Patent: December 8, 1987
    Assignee: Litton Systems, Inc.
    Inventor: Ronald W. Millman
  • Patent number: 4701586
    Abstract: An improved system for mounting a magnetron exterior to a microwave oven chamber. A magnetron antenna extends through an orifice in the chamber wall and mounting clips extend from the chamber walls at locations spaced around the orifice. Apertures are provided within the keeper plate of the magnetron to allow the clips to pass therethrough and engage a keeper plate interface on relative rotation of the chamber wall and plate. The clips may be formed as part of the chamber wall.
    Type: Grant
    Filed: May 30, 1986
    Date of Patent: October 20, 1987
    Assignee: Litton Systems, Inc.
    Inventor: Calvin A. Hagberg
  • Patent number: 4680439
    Abstract: A plastic microwave oven cavity assembly formed of top and bottom members having a microwave impermeable coating on the interior thereof and a side wall member having a microwave impermeable coacting on the exterior thereof with the members joined by seams which maintain the integrity of the microwave impermeable coacting to contain microwave energy within the cavity.
    Type: Grant
    Filed: May 30, 1986
    Date of Patent: July 14, 1987
    Assignee: Litton Systems, Inc.
    Inventor: Ronald W. Millman
  • Patent number: 4679884
    Abstract: A fused electrical plug for interconnecting appliances with a power supply (such as a conventional wall outlet). The plug includes at least neutral and positive terminal posts and may includes a ground terminal. The plug also includes a first body portion from which the neutral terminal post extends, the first body portion including a cavity for receiving a fuse. A second plug body portion carries the positive terminal post while a hinge secures the first and second plug portions for pivotal relative movement between an open position wherein the fuse receiving cavity is accessible in a closed position wherein the fuse receiving cavity is inaccessible. Electrical communication to the appliance is established via a fuse within the cavity and the positive terminal only when the first and second body portions are in the closed position. In a preferred embodiment, the first and second plug body portions are molded with the hinge being formed as a living hinge.
    Type: Grant
    Filed: May 7, 1986
    Date of Patent: July 14, 1987
    Assignee: Litton Systems, Inc.
    Inventor: Eldon J. Klemp
  • Patent number: 4663505
    Abstract: An interlock switch assembly is disclosed having a unitary baseplate having relatively few moving parts and making use of conventional low cost miniature switches, each positively located and retained with respect to the baseplate. First and second actuators convert, respectively, linear motion of first and second operators into rotary motion to actuate the miniature switches. Switch actuation is prevented unless the properly timed motion of both operators is received by the actuators.
    Type: Grant
    Filed: May 22, 1986
    Date of Patent: May 5, 1987
    Assignee: Litton Systems, Inc.
    Inventor: George M. Drake
  • Patent number: 4651963
    Abstract: A mounting system for suspending an appliance from an overhanging structure and, particularly, for suspending an appliance of the type having a housing including an upper surface and projecting rims extending away from the housing of opposite edges of the upper surface. The system includes a first bracket for attachment to the overhanging structure, the first bracket including a first lip for supporting one of the upper surface rims. A second bracket is in telescoping relation to the first bracket and includes a second lip for supporting the other of the upper surface rims. The first and second brackets are resiliently urged toward each other while the relative movement between the brackets is regulated. In a preferred embodiment, the relative movement between the first and second bracket is restricted by stops and prevented by a locking mechanism.
    Type: Grant
    Filed: May 31, 1985
    Date of Patent: March 24, 1987
    Assignee: Litton Systems, Inc.
    Inventors: Gary W. Busse, Jerome Tronnes
  • Patent number: 4563560
    Abstract: A microwave oven construction is disclosed wherein the oven cavity is assembled without the use of structural welds. A pair of pan shaped members, one forming the oven cavity top and the other forming the oven cavity bottom are placed edge to edge and crimped together to form a unitary cavity structure. An oven front panel is crimped to the cavity structure thus formed.
    Type: Grant
    Filed: June 11, 1982
    Date of Patent: January 7, 1986
    Assignee: Litton Systems, Inc.
    Inventor: Howard E. Bonner
  • Patent number: 4545064
    Abstract: A mounting system for securing a rotating anode of an x-ray tube against axial movement locates a bearing on a stud projecting from a tube end wall and secures the bearing on the stud by means of a threaded fastener which is accessed through a central bore of the rotating anode assembly prior to closure of the tube vacuum envelope.
    Type: Grant
    Filed: October 28, 1983
    Date of Patent: October 1, 1985
    Assignee: Litton Systems, Inc.
    Inventor: Heinrich F. Klostermann
  • Patent number: 4542268
    Abstract: A browning heater for a microwave oven. The heater is comprised of a porcelain coated steel cover sheet, a foil resistance heater, a thermal insulation sheet and a stainless steel backplate bound together in order. The heater is mounted on the interior cavity roof of a microwave oven. The heater browns food by means of infrared radiation.
    Type: Grant
    Filed: January 28, 1980
    Date of Patent: September 17, 1985
    Assignee: Litton Systems, Inc.
    Inventors: George A. Jarvis, Larry M. Sivertson
  • Patent number: 4516007
    Abstract: An interlock switch module for a microwave oven provides a unitary housing containing primary and secondary interlock switches, interlock and logic monitor switches, and a cavity lamp switch. Apertures are provided in the housing to receive actuators external of the switch module. One actuator is contained within the module and is adapted to be actuated by a portion which protrudes from the module. Sequencing and timing of the switches are provided for.
    Type: Grant
    Filed: August 19, 1982
    Date of Patent: May 7, 1985
    Assignee: Litton Systems, Inc.
    Inventors: Mark G. Ringdahl, Lambert L. Raymond, Richard J. Scherer
  • Patent number: 4470645
    Abstract: A bearing mounting assembly for rotating anode X-ray tubes is disclosed having a pair of spaced apart bearings mounting a rotating shaft within a hollow bearing housing. A sleeve circumscribes the bearing housing and has shoulders engaging a spring washer to provide axial positioning and preloading of the bearings through the spring washer by means of radially disposed set screws in the sleeve engaging the bearing housing.
    Type: Grant
    Filed: July 25, 1983
    Date of Patent: September 11, 1984
    Assignee: Litton Systems, Inc.
    Inventor: Albert B. Lauwasser
  • Patent number: 4461994
    Abstract: The tachometer of the present invention has a stator member with a pair of opposed stator elements. The stator member is mounted on the apparatus. Windings are provided on the stator elements in which the electric signal is generated.A magnetic means is provided for establishing a magnetic flux between the stator segments. For this purpose, magnets may be mounted on the exterior of the stator segments and the portions of the apparatus adjacent the segments used as the flux return path. Or, magnets may bridge the two stator segments.A magnetically permeable rotor is mounted on the apparatus shaft. The rotor may be formed of steel laminations with no rotating winding and has a plurality of peripheral projections that alter the reluctance of the magnetic path in the teeth as they rotate, inducing a speed responsive signal in the windings. The maximum speed of the rotor is limited only by the strength of the steel.
    Type: Grant
    Filed: March 19, 1982
    Date of Patent: July 24, 1984
    Assignee: Litton Industrial Products, Inc.
    Inventor: Daniel J. MacDonald
  • Patent number: 4449228
    Abstract: An improved PBL X-ray system in which the collimator is automatically adjusted so that the X-ray field size at an image receptor conforms to the image receptor size and the X-ray source to image receptor distance. Swivelling of the collimator in a plane parallel to the image receptor is detected and operation of the X-ray source is disabled. Manual operation may be obtained by removing the image receptor from its holder. Swivelling the collimator plus or minus 90.degree. exchanges the normally detected image receptor cross and longitudinal dimensions to automatically realign the collimator and image receptor axis. A PBL time delay is provided to prevent premature and undesired operation of the collimator shutters.
    Type: Grant
    Filed: March 30, 1982
    Date of Patent: May 15, 1984
    Assignee: Litton Industrial Products, Inc.
    Inventor: Robert L. Burbury
  • 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
  • Patent number: 4443888
    Abstract: An improvement in Source-to-Image Distance monitors for automatic adjusting X-ray radiography equipment having a cable, rewind spring, a self-traversing constant diameter takeup drum moving past a fixed aperture, an electrical potentiometer to provide a continuously varying electrical output signal and a snap action switch mechanism to indicate relative movement of the X-ray apparatus being monitored.
    Type: Grant
    Filed: March 29, 1982
    Date of Patent: April 17, 1984
    Assignee: Litton Industrial Products, Inc.
    Inventor: James W. Cutter
  • Patent number: 4435883
    Abstract: A control circuit for apparatus stretching a web between intake, discharge, and intermediate pulling stations (20-1, 20-2, 20-3). The circuit includes a first signal generator (32) for providing a signal to the intake discharge station (20-1) corresponding to the desired speed of the web at that station. A multiplier (40) alters the first signal in accordance with the amount of overall stretching, or stretch ratio, desired in the apparatus. The multiplier provides a second signal to the discharge station (20-3) corresponding to the speed of the web at the discharge station necessary to obtain the overall stretching. A second signal generator (48-66) subtracts a selected amount of the difference between the first and second signals from the second signal to provide a third signal to the intermediate pulling station (20-2) that distributes the overall stretching in the apparatus between intermediate zones formed by the adjacent pulling stations.
    Type: Grant
    Filed: September 28, 1981
    Date of Patent: March 13, 1984
    Assignee: Litton Industrial Products, Inc.
    Inventor: Jerome D. Muszynski
  • Patent number: RE31704
    Abstract: Electrical apparatus includes electrical coil means formed of multiple turns of enamel-covered electrical wire axially mounted on a core of magnetic material in electromagnetic energy coupling relationship therewith, and a relatively flat flexible electrical cable containing a plurality of spaced parallel conductors extending between the cable ends contains a loop shaped portion extending about an axis of said core over an arcuate distance greater than 180 degrees.
    Type: Grant
    Filed: May 10, 1982
    Date of Patent: October 9, 1984
    Assignee: Litton Systems, Inc.
    Inventor: Thomas E. Hester