Patents by Inventor Frederick J. Bishop

Frederick J. Bishop 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).

  • Solenoid with armature biased towards the rest position with two springs
    Patent number: 5252938
    Abstract: A solenoid having an armature movable with respect to a stator from a rest position to an energized position when a coil is energized. Two return devices, for instance helical compression springs, urge the armature to return to the rest position. Two slidable sleeves are provided between stator and the armature. Ingress of dirt into the armature may jam either sleeve with respect to the stator or the armature without jamming the solenoid, since the other return devices/sleeve combination will still permit movement of the armature.
    Type: Grant
    Filed: February 24, 1992
    Date of Patent: October 12, 1993
    Assignee: Lucas Industries public limited company
    Inventor: Frederick J. Bishop
  • Ammunition chuting for a machine gun
    Patent number: 4939978
    Abstract: A flexible ammunition chuting (14) for a machine gun (10) includes a flexible spine (26) made up of spring steel strips (27, 29) which are anchored at two spaced and fixed positions, typically at the chuting ends, so as precisely to define the length of the chuting. The chuting includes relatively articulated links (20), which are able to follow convex and concave bends and to twist torsionally, but the spine (26) prevents the overall stretching or collapse of the links, which might result in ammunition belt misfeed or jamming.
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: July 10, 1990
    Assignee: Lucas Industries Public Limited Co.
    Inventors: Frederick J. Bishop, David T. Cooper, William H. Hill