Patents by Inventor Gary R. Graham

Gary R. Graham 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).

  • Patent number: 4984138
    Abstract: A display for a stage lighting control console provides colored display elements adjacent light control devices of the console. Each colored display element corresponds in color to the color of a stage light associated with the adjacent light control device. The colored display elements are replaceable or remountable whereby the display accommodates different stage lighting configurations by rearrangement or substitution of the colored display elements.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: January 8, 1991
    Inventor: Gary R. Graham
  • Patent number: 4887020
    Abstract: A self-excited brushless alternator having a rotating field winding excited by an alternating current exciter whose rotating armature rotates with the rotating field winding and is permanently connected to the field winding via a field rectifier also mounted to rotate with the field winding. The exciter has an exciter stator primary winding and a rotary exciter secondary winding connected via a rotray field rectifier to the rotary main field winding of the alternator. The primary excitation for the exciter is derived, via magnetic coupling, from a rotary auxiliary magnetic field produced by a feedback winding in series with the main field winding and rotating herewith. A common magnetic circuit couples the rotary feedback winding with an auxiliary stator secondary winding and the exciter primary and secondary windings.
    Type: Grant
    Filed: October 27, 1987
    Date of Patent: December 12, 1989
    Assignee: U.S. Philips Corporation
    Inventor: Gary R. Graham