Patents Represented by Attorney B. W. Norton
  • Patent number: 4969812
    Abstract: A differential pressure machine for differentially pressure forming an article in a sheet of thermoplastic material including a frame, upper and lower platens movable on the frame between spread and less spread positions. Mechanism is provided for moving the platens between the spread and less spread positions for releasably locking the platens in the less spread positions. Upper and lower, opposed differential pressure molds mounted on the upper and lower platens, respectively, for movement therewith between open positions and closed positions for engaging opposite sides of a thermoplastic sheet of material and differentially pressure forming an article therein.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: November 13, 1990
    Inventor: Gaylord W. Brown
  • Patent number: 4890524
    Abstract: A trim press for severing articles differentially pressure formed in a thermoplastic sheet comprising a stationary die member and a movable trim die member mounted on a frame for movement toward and away from the stationary trim die member between a spaced apart position and a closed position in which the trim die members engage opposite sides of a sheet to sever the article from the sheet. Dynamically balanced drive mechanism is provided for moving the platen in a to-and-fro path of travel while concurrently oppositely moving a counterbalance weight movably mounted on the frame.
    Type: Grant
    Filed: August 31, 1988
    Date of Patent: January 2, 1990
    Assignee: John Brown Inc.
    Inventors: Gaylord W. Brown, Albert Arends
  • Patent number: 4566646
    Abstract: This invention relates to a take-up machine utilized in conjunction with the production of fiber or yarn wherein the product fiber or yarn, as it is produced, is wound onto spools or tubes. A control is provided for varying the speed of an electric motor which drives a spindle on which the tube or spool is mounted. This control is actuated by the position of a compensator arm which is connected to a core of a linear voltage differential transformer which, in turn, controls current flow through an NPN power transistor. The power transistor, in turn, controls current flow through a rectifier having one circuit for each of three windings of a three-phase AC motor, thereby controlling the speed of rotation of the motor.
    Type: Grant
    Filed: May 11, 1984
    Date of Patent: January 28, 1986
    Assignee: Leesona Corporation
    Inventor: Kenneth A. Benjamin
  • Patent number: 4528556
    Abstract: This invention relates to apparatus for detection and monitoring of improper operation of commutator-brush combinations conveying current to or from the electromagnetic rotary member of a motor or generator, and relates, more particularly, to means for detecting defective brushes in critical motor driven textile units such as yarn storage feeder devices which operate to store yarn temporarily for use by user means such as a loom.
    Type: Grant
    Filed: February 14, 1983
    Date of Patent: July 9, 1985
    Assignee: Leesona Corporation
    Inventor: Edward L. Maddox
  • Patent number: 4518126
    Abstract: A take-up mechanism for a winding unit wherein yarns, tapes or other strands are wound on tubes or similar supports. The invention particularly relates to a compensator wheel mounted for pivoting so that it maintains alignment with the strand passing therearound in all operative positions of the compensator wheel. In another embodiment, the compensator wheel configuration includes a concave curvature which may be used in a conventional take-up mechanism in conjunction with certain strands such as carbon fibers which may suffer edge damage during winding.
    Type: Grant
    Filed: July 6, 1983
    Date of Patent: May 21, 1985
    Assignee: Leesona Corporation
    Inventor: Bryce G. Marshall