Patents by Inventor Terence John Gapper

Terence John Gapper 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).

  • Mining machines
    Patent number: 4062593
    Abstract: A linear potentiometer is attached to the ranging arm of a ranging arm shearer such that it slides on the upper flange of the face conveyor to sense the height of the cutter drum relative to the conveyor.
    Type: Grant
    Filed: February 24, 1976
    Date of Patent: December 13, 1977
    Assignee: Coal Industry (Patents) Limited
    Inventors: Terence John Gapper, Owen O'Neill
  • Mining machines
    Patent number: 4006935
    Abstract: A ranging arm shearer mining machine has sensing means for sensing the position of the rotational axis of a cutter drum mounted on the ranging arm relative to the pivotal axis of the arm.
    Type: Grant
    Filed: May 19, 1975
    Date of Patent: February 8, 1977
    Assignee: Coal Industry (Patents) Limited
    Inventors: Terence John Gapper, George Thomas Addison, David Arthur Tate
  • Mining machines with extensible probe arm
    Patent number: 3984147
    Abstract: A cutting horizon sensing probe of a ranging drum shearer mining machine is mounted on a telescopic arm pivotally supported on the body of the machine such that when it is desired to move the probe into its operational position the arm is first extended from its non-operational position to an intermediate position and is then pivoted towards its operational position.
    Type: Grant
    Filed: May 20, 1975
    Date of Patent: October 5, 1976
    Assignee: Coal Industry (Patents) Limited
    Inventor: Terence John Gapper