Patents by Inventor John Dee Martin, Jr.

John Dee Martin, Jr. 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 transmitting data over a power cable utilizing a magnetically saturable core reactor
    Patent number: 5670931
    Abstract: The present invention impresses the data on the power signal by utilizing a saturable core reactor. The saturable core reactor uses two cores. Each core has both load windings and control windings. The control windings are selectively energized to alter an electrical characteristic of the current passing through the load windings. The saturable core reactor is designed with cores made of a highly magnetically permeable material so that the cores are easily saturated. The cyclical saturation of the cores achieved by the load current, and the selective saturation of the cores achieved by selectively applying a control current, results in "deformations" being selectively formed at the zero crossings of the load current waveform. These "deformations" can be selectively formed on the power signal to represent a binary data stream.
    Type: Grant
    Filed: June 17, 1994
    Date of Patent: September 23, 1997
    Assignee: Baker Hughes Incorporated
    Inventors: Gordon Lee Besser, Cecil Glynn Davis, Edward Bryant Tickell, Jr., Dick Lee Knox, John Dee Martin, Jr.