Patents by Inventor Richard G. Tomlinson

Richard G. Tomlinson 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).

  • Optical pressure sensor
    Patent number: 4368645
    Abstract: A system for sensing pressure features an electrically passive sensing head connected to electrically active components by a fiber optic cable. A preferred embodiment combines a polariscope bracketing a quarter wave plate and a photoelastic medium. The dependence of the intensities of two polarization components of light emerging from the photoelastic medium on the pressure applied to the medium permits the measurement of that pressure in a manner that has quadratic error dependence on optical misalignment.
    Type: Grant
    Filed: September 26, 1980
    Date of Patent: January 18, 1983
    Assignee: United Technologies Corporation
    Inventors: William H. Glenn, Richard G. Tomlinson
  • Digitally compatible optical pressure measurement
    Patent number: 4321831
    Abstract: An apparatus for pressure measurement employs fiber optics to transport a broadband beam light to and from a remote electrically passive sensing head. In the sensing head, a linearly polarized beam is phase shifted in a birefringent plate, then passed through a photoelastic pressure sensor and a polarization analyzer. The wavelength for which the output light has an intensity minimum is a measure of the applied pressure.
    Type: Grant
    Filed: September 26, 1980
    Date of Patent: March 30, 1982
    Assignee: United Technologies Corporation
    Inventors: Richard G. Tomlinson, William H. Glenn