Patents by Inventor Ronald Alfred Heath

Ronald Alfred Heath 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).

  • Electromagnetic force applying device
    Patent number: 3955164
    Abstract: An electromagnetic force applying device comprises a core with an annular air gap, a coil for creating a radial magnetic field in the air gap and an armature ring movable axially in the air gap. The core and the ring are of different magnetic materials with different coefficients of thermal expansion so that the force applied to the ring when a given current flows through the coil varies with temperature.
    Type: Grant
    Filed: November 26, 1974
    Date of Patent: May 4, 1976
    Assignee: Lucas Aerospace Limited
    Inventors: Alan Thomas, Ronald Alfred Heath