Patents by Inventor Mark T. Carnes

Mark T. Carnes 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).

  • Regulated power supply for video display apparatus
    Patent number: 4626977
    Abstract: A video display apparatus includes a regulated transformer power supply that provides power to an external load device, such as a computer, via one winding on the power supply transformer. Operation of the video display apparatus without the external circuit attached may cause degradation of the other transformer winding load circuits due to insufficient transformer power transfer as a result of decreased external power supply loading. A diode is connected from the external load supply to another load circuit to supply power to the other load circuit when the external device is not attached. When the external device is attached, the diode is reverse biased and does not conduct.
    Type: Grant
    Filed: December 27, 1985
    Date of Patent: December 2, 1986
    Assignee: RCA Corporation
    Inventors: Mark T. Carnes, Lawrence E. Smith