Patents Assigned to Litton Industrial Products, Inc.
  • Patent number: 4563890
    Abstract: A cut-off style, roll thread flat die for use with a matched cut-off style, roll thread flat die to form a threaded, pointed fastener such as a gimlet point screw, the cut-off style, roll thread flat die having a top operating surface comprising body-threads, point threads, a slug traction ramp to provide controlled rotation for the cut-off slug and a slug extrusion taper to provide proper extrusion of the cut-off slug from the fastener, the slug traction ramp and the slug extrusion taper extending in side-by-side relation from a start location, past a transition location to a termination location, the slug traction ramp and the slug extrusion taper having a common edge and thereby being laterally continuous from the start location to the transition location, the slug extrusion taper forming an obtuse angle with the slug traction ramp from the start location to the transition location, the edge of the slug extrusion taper adjacent the slug traction ramp being substantially vertically spaced above the edge of
    Type: Grant
    Filed: January 27, 1984
    Date of Patent: January 14, 1986
    Assignee: Litton Industrial Products, Inc.
    Inventor: Joseph F. Dickson
  • Patent number: 4527357
    Abstract: An internal grinding machine comprising a work head adapted to rotate about a selected axis and to be displaced in a direction perpendicular to that axis. The work head includes a workpiece holding fixture having a fixed lower jaw and an upper jaw displaceable from an open position to a closed position for clamping the outer periphery of a cylindrical workpiece having a longitudinally extending slot along the length thereof. The fixed jaw has a longitudinally extending key to be located within the keyway of the workpiece. A grinding spindle adapted to be rotated about and displaced along its axis includes a grinding wheel having a plurality of annular, outwardly projecting tapered grinding portions for effecting stock removal from a clamped workpiece and cutting the workpiece into a selected number of annular rings, as the workpiece holding fixture is advanced relative to the grinding wheel from a start position to a finish position.
    Type: Grant
    Filed: March 12, 1984
    Date of Patent: July 9, 1985
    Assignee: Litton Industrial Products, Inc.
    Inventor: William E. Shank
  • Patent number: 4524547
    Abstract: A surface grinding machine comprises a wheelhead assembly including an abrasive disc having a flat stock removal surface and a means for supporting the wheelhead assembly for movement in an axial direction. A microprocessor controller defines a selected infeed program for the wheelhead assembly having at least an initial infeed distance, and an initial feed rate, and a finish infeed distance at a finish feed rate less than said initial feed rate. The microprocessor controller additionally changing the axial location of said retracted and finish positions in response to attrition of the abrasive disc caused by workpiece grinding and disc dressing.
    Type: Grant
    Filed: September 6, 1983
    Date of Patent: June 25, 1985
    Assignee: Litton Industrial Products, Inc.
    Inventors: Gaylord E. Heaston, Edward A. Farazandeh
  • Patent number: 4519722
    Abstract: A centerless grinder comprising a machine frame including bearings for supporting a shaft and a portion having a bore defined therein, a regulating wheelhead driving including a main drive shaft including a first shaft portion adapted to be supported by the bearings, a second threaded shaft portion axially adjacent the first shaft portion, and a third shaft portion extending through the bore, the third portion axially adjacent the second threaded portion and tapered inwardly toward the second shaft portion, a clamping ring having a threaded inner diameter for threadedly engaging with the second threaded shaft portion, and a plurality of holes defined in the outer diameter thereof for engagement by a suitable tool for rotating the clamping ring, a drive coupling having a tapered bore defining a surface for mating engagement with the tapered third shaft portion, and a threaded outer diameter, and drive lugs on the end remote from the first shaft portion, and a locking ring having a threaded inner diameter for t
    Type: Grant
    Filed: September 3, 1982
    Date of Patent: May 28, 1985
    Assignee: Litton Industrial Products, Inc.
    Inventors: William E. Shank, Kenneth K. Bercaw
  • Patent number: 4492890
    Abstract: A stator winding configuration employs graded, overlapping stator winding coil groups. The outer coils of the coil group have a reduced number of turns with respect to the center coil or coils of the group. The coil groups have an expanded coil group width. The outer coils of adjacent, expanded width coil groups are overlapped by placing the reduced turn outer coils in common slots in the stator core.
    Type: Grant
    Filed: May 18, 1983
    Date of Patent: January 8, 1985
    Assignee: Litton Industrial Products, Inc.
    Inventor: Daniel J. MacDonald
  • Patent number: 4482163
    Abstract: A spindle powered adjustable chuck for forcefully gripping a workpiece capable of automatically adjusting gripping diameter comprising a support frame having a plurality of radially oriented jaw receiving compartments, jaws displaceable within the jaw receiving compartments, and worm gears for radially displacing the jaws, clamps for simultaneously displacing the jaws to a clamping position preparatory to rotating the chuck for operation, a spindle for rotatively driving the support frame, a planetary gear train including an internally splined sun gear and a plurality of planetary gears, splined shaft for coupling the planetary gears to the worm gears, and a two position splined key for operatively engaging and disengaging the planetary gear train, including a compression spring for biasing the splined key to a first position whereat the planetary gear train is fixed relative to the support frame, whereby rotation of the spindle can rotate a workpiece clamped to the support frame, the splined key being displa
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: November 13, 1984
    Assignee: Litton Industrial Products, Inc.
    Inventor: Frank A. Depweg
  • Patent number: 4480412
    Abstract: An in-process grinding gage providing a means for continuously indicating the diameter of a cylindrical workpiece being ground comprising a mounting bracket gaging head means including a body including fixed upper and center pads and an arm pivotally secured to the body and including a lower pad, arm spring means for urging the lower pad into engagement with the workpiece, leaf spring means secured to the mounting bracket and having a free end, the gaging head means secured to the leaf spring and positioned so that the upper and center pads engage the workpiece which is to be ground to size, the leaf spring and the arm spring comprising means for continuously maintaining all three pads in contact with the workpiece as it is ground to size.
    Type: Grant
    Filed: September 3, 1982
    Date of Patent: November 6, 1984
    Assignee: Litton Industrial Products, Inc.
    Inventors: William E. Shank, Kenneth K. Bercaw
  • Patent number: 4478008
    Abstract: A double disc grinding machine comprising first and second stock removal assemblies, each including a wheelhead assembly including a base for slidably supporting the wheelhead assembly, a frame for supporting the first and second stock removal assemblies including front and rear walls, each having a vertically extending opening defined therein, a top portion above the opening and a bottom portion below the opening, one of the top portions having a tensile bolster for defining a first liquid container, the other one of the top portions also having a tensile bolster for defining a second liquid container, a reservoir including the bottom portions for defining a third liquid container, each of the containers having inlets and outlets, conduits for connecting the outlet ports of the third container to the inlet ports of the first and second containers and for connecting the outlet ports of the first and second containers and the inlet ports of the third container, the conduit including a fluid recirculating pump.
    Type: Grant
    Filed: November 19, 1981
    Date of Patent: October 23, 1984
    Assignee: Litton Industrial Products, Inc.
    Inventor: Elman R. Dunn
  • Patent number: 4476847
    Abstract: An adjustable double disc grinder dresser comprising a dresser arm mounted on a shaft, a bracket including spaced opposing walls, one of the walls supporting one end of the shaft for pivotal displacement about its axis and for limited pivotal displacement about mutually perpendicular vertical and horizontal axes, the support including a face to face mounted pair of ball bearings, and a spacer having a width selected to locate the bearing load centers of the ball bearings coincident on the axis of rotation of the shaft, the mutually vertical and horizontal axes intersecting at the point of coincidence, and adjustment screws for infinitely varying the horizontal location of the axis of the shaft through a limited range, and a support for the other end of the shaft permitting pivotal displacement about its axis and for limited pivotal displacement about mutually perpendicular vertical and horizontal axes, the other support including a face to face mounted pair of ball bearings, and a spacer having a width select
    Type: Grant
    Filed: September 2, 1982
    Date of Patent: October 16, 1984
    Assignee: Litton Industrial Products, Inc.
    Inventor: Elman R. Dunn
  • Patent number: 4475371
    Abstract: A machine is disclosed which will test an elongated round cross-section workpiece by bending the workpiece as it is rotated to determine if a breakable area such as a welded area will break. Broken workpieces are discarded but those testing satisfactorily proceed through the machine for a straightening operation to straighten the entire workpiece, including the breakable area. The above description is merely one form of the invention and is not to be construed as limiting on the scope of the invention.
    Type: Grant
    Filed: May 20, 1983
    Date of Patent: October 9, 1984
    Assignee: Litton Industrial Products, Inc.
    Inventor: Ronald J. Matej
  • Patent number: 4463415
    Abstract: A timing generator for use with multi-phase controlled rectifier systems is disclosed in which a ramp signal is produced in phase synchronization with the power source and compared with the value of a command signal. The command signal is indicative of the desired SCR ignition angle. A sequencing circuit, having a finite number of output states is cyclically stepped from one state to the next by a comparator. The sequencing circuit couples a source of SCR-gating pulses to the appropriate SCR in accordance with its state and with a predetermined pattern of SCR ignitions which characterize the multi-phase source.One aspect of the invention provides the multiplexing of the comparator output whereby the command signal is offset by 60.degree. (electrical) after each comparator transition to set up conditions for the next transition.A further aspect of the invention provides for the generation of an alternate ramp, 180.degree.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: July 31, 1984
    Assignee: Litton Industrial Products, Inc.
    Inventor: Donald E. Vollrath
  • Patent number: 4462187
    Abstract: A double disc grinding machine comprising a wheelhead assembly, a base for supporting the wheelhead assembly for axial displacement relative thereto, the base including a front wall having a front trunnion secured thereto and extending horizontally therefrom, and a rear wall having a rear trunnion secured thereto and extending horizontally therefrom in coaxial relation with the front trunnion, and a principal machine frame including front and rear walls, the machine frame rear wall supporting the rear trunnion for pivotal displacement about its axis and for limited pivotal displacement about a mutually perpendicular vertical axis and structure for horizontally displacing the rear supporting structure along the rear wall of the frame thereby angularly displacing the front trunnion, and the machine frame front wall supporting the front trunnion for pivotal displacement about its axis and for limited pivotal displacement about a mutually perpendicular vertical axis.
    Type: Grant
    Filed: November 19, 1981
    Date of Patent: July 31, 1984
    Assignee: Litton Industrial Products, Inc.
    Inventor: Elman R. Dunn
  • Patent number: 4461379
    Abstract: A pallet conveyor assembly for moving, positioning, and transferring a heavy palletized load comprising a pallet, support means having a plurality of independent support modules each including a power driven closed loop vertically oriented link chain, the chain including engagement pins, means for supporting the pallet for displacement along the support means in a selected direction, pin engagement means mounted to the pallet including an engagement plate having a spaced pair of downwardly opening slots in which one of the engagement pins can be located, and spring means for biasing the engagement plate between an upper position whereat one of the slots can engage an engagement pin on the top run of the link chain, to a lower position, adjacent modules being selectively spaced and engagement pins being selectively located on the drive chain so that as a pallet is driven forwardly from one module to another an engagement pin of the one module will become disengaged from the front slot and an engagement pin of
    Type: Grant
    Filed: September 2, 1982
    Date of Patent: July 24, 1984
    Assignee: Litton Industrial Products, Inc.
    Inventor: Alan M. Papp
  • 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: 4452223
    Abstract: A cylindrical grinding machine truing and dressing device for refinishing the surface of a peripheral grinding wheel of a cylindrical grinder comprising support base attached to the work bed of a cylindrical grinding machine, housing means mounted to the base having means for rotatably supporting rotatable truing tool means, means for slidably housing dressing bar and abrasive block means, motor drive means to rotatively power the truing tool means, timing belt means to transmit rotative power to the truing tool means, stepping motor means to axially displace the dressing bar and abrasive block means, worm gear means for translating the stepping motor rotation into dressing bar axial displacement, the axial displacement precisely controlled to forcefully engage grinding wheel before, during and after truing operation.
    Type: Grant
    Filed: September 3, 1982
    Date of Patent: June 5, 1984
    Assignee: Litton Industrial Products, Inc.
    Inventor: William E. Shank
  • 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: 4443976
    Abstract: A cylindrical grinder for effecting stock removal from a cam surface on a workpiece, the cam surface including a base portion, a nose portion and flank portion joining the base and nose portions, the nose portion having a smaller radius of curvature than the base portion and being more distant from the axis of rotation of the cam than the base portion, comprising means for supporting the workpiece for rotation about a predetermined axis, means for defining a selected velocity profile for each revolution of the cam, the velocity profile having a plurality of acceleration/deceleration segments whereby the velocity of the surface of the cam at the grinding location is selectively varied, stock removal means including a grinding wheel and grinding wheel feed control means, the grinding wheel feed control means including rough feed control means having means for infeeding the grinding wheel at a plurality of sequentially operable feeds, finish control means having means for infeeding the grinding wheel at a plural
    Type: Grant
    Filed: January 29, 1982
    Date of Patent: April 24, 1984
    Assignee: Litton Industrial Products, Inc.
    Inventor: Russell E. Kaiser, Jr.
  • 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: 4442739
    Abstract: A machine tool including a base having a work zone including a drive gear, a work shuttle having a pair of work stations each having at least one work spindle and an idler gear, the work shuttle assembly is mounted on the base and is displaced to alternately locate each of the work stations at the work zone and at a load/unload zone, and each of the work spindles is presented at a predetermined orientation at the work and load/unload zones by means of a gear rack mounted on the base for engaging each of the idler gears as the shuttle is displaced from one to another of the positions, the gear rack having at least a portion of the teeth thereof removed proximate the drive gear whereby the idler gear of the station located at the work zone will be operatively associated with the drive gear but will not be operatively associated with the gear rack, rotation of the drive gear is prevented as the work shuttle assembly is displaced and rotation of the drive gear is allowed when the work shuttle assembly is located
    Type: Grant
    Filed: June 21, 1982
    Date of Patent: April 17, 1984
    Assignee: Litton Industrial Products, Inc.
    Inventors: Sven V. Swanson, Jr., Richard G. Swanson