Patents by Inventor Jonathan Humfrey Pope

Jonathan Humfrey Pope 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).

  • Method and apparatus for indicating angular displacement
    Patent number: 4032158
    Abstract: A tone arm for a record player having a mirror at one end is provided. Opposite the mirror are a light source and two detector elements. When the tone are pivots from a desired angle light from the source is reflected upon the element more than on the other. The mirror is convexly curved so that pivotal motions of the tone arm in one plane will not affect the amount of light reaching the detectors.
    Type: Grant
    Filed: September 3, 1975
    Date of Patent: June 28, 1977
    Assignee: Strathearn Audio Limited
    Inventors: Colin Howard Stanwell-Smith, Dexter Robert Plummer, Frederick James Easthope, Jonathan Humfrey Pope