Patents by Inventor C. Earle Theall, Jr.

C. Earle Theall, 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).

  • Bi-directional signal coupler for a balanced data transmission line
    Patent number: 4998079
    Abstract: A coupler for a balanced two wire data transmission line includes input and output ports as well as a forward coupled port and a reflected coupled port. The coupler is constructed of passive components including transformers and resistors to provide at the forward coupled port a signal proportional to the signal transmitted from a source to a load and provide at the reflected coupled port a signal proportional to the magnitude of the signal reflected from the load due to mismatch.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: March 5, 1991
    Assignee: Plessey Electronic Systems Corp.
    Inventor: C. Earle Theall, Jr.
  • R.F. impedance match control system
    Patent number: 4621242
    Abstract: An R.F. impedance match control system. The reflection coefficient of the system is compared to a threshold to determine a mismatch condition which is corrected by selectively changing in incremental steps the turns ratio of an autotransformer provided at the input to the load until the mismatch condition is corrected. Timing means are provided to delay each mismatch correction until initial transient conditions are stabilized and to shut off R.F. power during each turns ratio change.
    Type: Grant
    Filed: March 19, 1984
    Date of Patent: November 4, 1986
    Assignee: The Perkin-Elmer Corporation
    Inventors: C. Earle Theall, Jr., Hans G. Ludwig, Michael J. Gustin