Patents by Inventor R. Campbell

R. Campbell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Compositions of polyphenylene ether resin and poly(tetra-alkylated bisphenol) having reduced melt viscosity
    Patent number: 4507436
    Abstract: The melt viscosity of thermoplastic compositions of polyphenylene ether resin and rubber modified high impact polystyrene resin is significantly reduced by inclusion of a tetra-alkyl bisphenol polycarbonate resin. The resulting blend can be processed at lower temperatures, and, after molding, exhibits better UV color stability while retaining most important other physical properties. Both the compositions and a method of preparation are described.
    Type: Grant
    Filed: January 13, 1983
    Date of Patent: March 26, 1985
    Assignee: General Electric Company
    Inventors: Robert J. Axelrod, John R. Campbell, Sai-Pei Ting
  • Twine cut and clamp mechanism for a roll baling machine
    Patent number: 4505197
    Abstract: A twine cut and clamp mechanism for a roll baling machine includes a pair of arms and a pair of intermeshing spur gears connected, respectively, to the arms. A lever is connected to one of the arms to pivot it. The spur gears cause concurrent pivoting of the other arm when the one arm is pivoted by the lever.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: March 19, 1985
    Assignee: Sperry Corporation
    Inventors: Paul S. Shenberger, James D. Walker, Willis R. Campbell
  • Snubbing apparatus for an aircraft control surface actuator
    Patent number: 4497461
    Abstract: A snubber (12) includes a fixed member (14) and a movable member (16). A variable volume chamber (20) is defined between these two members (14, 16). The chamber (20) includes an orifice (22). A body of extrusible material (26) substantially fills the chamber (20). A rotary actuator (6) carries a lug (28) that contacts the movable member (16) when the actuator (6) moves beyond a predetermined position. This contact pushes the movable member (16) against the extrusible material (26) to decrease the volume of the chamber (20) and to cause the extrusible material (26) to be extruded through the orifice (22). This stops the rotation of the actuator (6) and absorbs its kinetic energy. The snubber (12) is supported by a frame member (10). Preferably, the frame member (10) has a cavity (40) into which material extruded through the orifice (22) is received.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: February 5, 1985
    Assignee: The Boeing Company
    Inventor: Dennis R. Campbell
  • Control system for a d.c. motor
    Patent number: 4496888
    Abstract: A d.c. motor control system, intended primarily for use in battery powered vehicles, includes a control switch (RL2a, RL2b) for varying the connections of the motor field winding (24) to determine the mode of operation of the motor and speed interlock means for preventing said control switch being operated to change the motor mode while the motor is actually running. Instead of using a mechanical speed transducer the speed interlock means includes means for supplying current to the motor field winding (24) when current would not otherwise be flowing therethrough and means (BR1, T.sub.1, P.sub.16 etc.) connected to detect the voltage across the armature which occurs in these circumstances if the motor is in motion.
    Type: Grant
    Filed: December 30, 1982
    Date of Patent: January 29, 1985
    Assignee: Lucas Industries Limited
    Inventor: Graeme R. Campbell
  • Synthesis of zwitterionic siloxane polymers
    Patent number: 4496705
    Abstract: A method is provided for producing aminoalkyl-siloxane polymers of a high molecular weight by hydrolyzing a difunctional aminoalkyl-silane prior to incorporation into the siloxane polymer. The high molecular weight siloxane polymers obtained may be converted to zwitterionic siloxane rubbers with excellent engineering properties and integrity.
    Type: Grant
    Filed: January 4, 1984
    Date of Patent: January 29, 1985
    Assignee: General Electric Company
    Inventors: Robert A. Florence, John R. Campbell, Robert E. Williams, Jr.
  • Dissociating ionically cross-linked siloxane polymers
    Patent number: 4493926
    Abstract: A method is provided wherein ionically cross-linked zwitterionic siloxane polymers are solubilized by the addition of a weak base to a combination of the zwitterionic siloxane polymers and an organic solvent. Where a weak base having a high vapor pressure is utilized, the zwitterionic siloxane polymers can be recured by evaporation of the organic solvent and base.
    Type: Grant
    Filed: January 4, 1984
    Date of Patent: January 15, 1985
    Assignee: General Electric Company
    Inventors: Robert E. Williams, Jr., John R. Campbell
  • Apparatus and method for forming wire reinforced helically fabricated tubing
    Patent number: 4479835
    Abstract: In the forming of flexible tubing of at least one wire helix covered by a helically wrapped tape, an apparatus and method for making such tubing wherein an endless belt of a width a plurality of times the pitch of the wire helix is passed against a rotating mandrel surface to draw the wire helix and tape wrapping together.
    Type: Grant
    Filed: June 1, 1982
    Date of Patent: October 30, 1984
    Assignee: Automation Industries, Inc.
    Inventors: Thomas A. Kutnyak, Arthur R. Campbell
  • Missile launcher
    Patent number: 4475436
    Abstract: A rotatable support mounts a plurality of missile carrying missile launchers for rotation about a center axis. Each launcher mounts a plurality of missiles for rotation about an axis. The rotatable support is rotated to successively bring each missile launcher into a launch position. Each such launcher is rotated to successively bring each missile carried by it into a launch position.
    Type: Grant
    Filed: April 21, 1980
    Date of Patent: October 9, 1984
    Assignee: The Boeing Company
    Inventor: Dennis R. Campbell
  • Interfacial polycondensation polycarbonate process with quaternary phosphonium amino halide catalyst
    Patent number: 4471105
    Abstract: This invention relates to an improved interfacial polycondensation polycarbonate process wherein a dihydric phenol is reacted with a carbonyl halide in the presence of a quaternary-phosphonium amino halide catalyst.
    Type: Grant
    Filed: February 2, 1983
    Date of Patent: September 11, 1984
    Assignee: General Electric Company
    Inventors: John R. Campbell, James W. Thackeray
  • Sprocket-shaped member for supporting apron tubes in roll baling machine
    Patent number: 4462203
    Abstract: In a roll baling machine having a floor roller and an apron which cooperate in suitable manner to form roll bales, a sprocket-shaped member is provided to support the transverse tubes of the apron against bending and twisting loads during bale formation and thereby prevent damage to the apron.
    Type: Grant
    Filed: September 3, 1982
    Date of Patent: July 31, 1984
    Assignee: Sperry Corporation
    Inventors: Stephen C. Schlotterbeck, Francis L. Uhland, Jr., Willis R. Campbell, John H. Freimuth
  • Method for making bisphenol catalysts
    Patent number: 4455409
    Abstract: A method is provided for making sulfonated aromatic organic polymers having aminoorganomercaptan groups attached to backbone sulfonyl radicals by covalent nitrogen-sulfur linkages. These sulfonated aromatic organic polymers can be used as an ion-exchange resin for making bisphenols.
    Type: Grant
    Filed: December 2, 1982
    Date of Patent: June 19, 1984
    Assignee: General Electric Company
    Inventors: Gary R. Faler, John R. Campbell
  • Stripper bar for roll baling machine
    Patent number: 4436027
    Abstract: In a roll baling machine having a floor roller and a bale forming apron, a stripper bar is provided to remove crop material from the floor roller and thereby minimize the amount of crop material lost between the floor roller and the apron while baling.
    Type: Grant
    Filed: April 28, 1982
    Date of Patent: March 13, 1984
    Assignee: Sperry Corporation
    Inventors: John H. Freimuth, Willis R. Campbell
  • Overfill protection apparatus for roll baling machine
    Patent number: 4434607
    Abstract: An overfill protection apparatus is provided for a roll baling machine to prevent overfilling the bale chamber. The overfill protection apparatus includes a trip lever and an actuating lever. When the bale chamber is filled to a predetermined level, the trip lever moves from a first to a second position to allow the actuating lever to interrupt the driving of the pickup header of the machine.
    Type: Grant
    Filed: August 6, 1982
    Date of Patent: March 6, 1984
    Assignee: Sperry Corporation
    Inventor: Willis R. Campbell
  • Baling machine with air spring means for maintaining apron tension
    Patent number: 4426833
    Abstract: In a roll baling machine having an apron movable in suitable manner to form roll bales of crop material, air springs are used to maintain tension in the apron. The air springs each include an air bag and a piston. The air pressure in the air bags is adjustable in order to adjust the tension in the apron.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: January 24, 1984
    Assignee: Sperry Corporation
    Inventor: Willis R. Campbell
  • Baling machine with roller-type floor
    Patent number: 4425752
    Abstract: A roll baling machine includes a floor roller and an apron movable in suitable manner to form roll bales of crop material. The floor roller and the apron cooperate to define a bale forming chamber of generally wedge shape having a forward end which is narrower than the rearward end thereof. The apron moves upwardly and rearwardly of the machine at the rear of the bale forming chamber and then downwardly and forwardly of the machine at the top of the bale forming chamber.
    Type: Grant
    Filed: September 16, 1981
    Date of Patent: January 17, 1984
    Assignee: Sperry Corporation
    Inventors: Donald L. Sheesley, Willis R. Campbell
  • Drive apparatus for roll baling machine
    Patent number: 4424662
    Abstract: A roll baling machine including a floor roller, a bale forming apron, and drive apparatus connected between the floor roller and the bale forming apron. The drive apparatus causes rotation of the floor roller in response to movement of the apron in a normal direction during bale formation. The drive apparatus includes a clutch mechanism which drivingly disconnects the floor roller from the apron in response to movement of the apron in reverse direction such as when a bale is discharged from the machine.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: January 10, 1984
    Assignee: Sperry Corporation
    Inventors: Edward T. Eggers, John H. Freimuth, Richard E. Jennings, Willis R. Campbell
  • Baling machine with air spring means for maintaining apron tension
    Patent number: 4422374
    Abstract: A roll baling machine includes a frame, an apron supported on the frame for forming a roll bale of crop material, and an arm assembly mounted on the frame supporting part of the apron. Air springs are connected between the arm assembly and the frame normally urging the arm assembly in a direction to dispose part of the apron in a substantially S-shaped configuration in side elevation.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: December 27, 1983
    Assignee: Sperry Corporation
    Inventors: Willis R. Campbell, Edward T. Eggers
  • Boot heel protector
    Patent number: D272104
    Type: Grant
    Filed: August 17, 1981
    Date of Patent: January 10, 1984
    Inventor: James R. Campbell
  • Bottle
    Patent number: D274501
    Type: Grant
    Filed: May 3, 1982
    Date of Patent: July 3, 1984
    Assignee: The Procter & Gamble Company
    Inventor: Paul R. Campbell
  • Jar
    Patent number: D277550
    Type: Grant
    Filed: September 13, 1982
    Date of Patent: February 12, 1985
    Assignee: The Procter & Gamble Company
    Inventors: Paul R. Campbell, Robert E. Dilgard, Jr., William J. O'Neil, Jr.