Patents by Inventor Thomas E. Cosby

Thomas E. Cosby 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).

  • Methods and apparatus for continuous ground fault self-test
    Patent number: 9239368
    Abstract: Methods and apparatus for continuous ground fault self-test are disclosed. An example ground fault detection device includes a sense coil to detect current in a line conductor and a neutral conductor, the sense coil comprising a winding influenced by a current difference between the line conductor and the neutral conductor. The example ground fault detection device also includes a current bypass to facilitate a continuous current imbalance detected by the sense coil, and a ground fault detector circuit to detect at least one of the continuous current imbalance in the sense coil or a ground fault current imbalance.
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: January 19, 2016
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Artur J. Lewinski, Ross Teggatz, Thomas E. Cosby
  • Methods and apparatus to manage ground fault conditions with a single coil
    Patent number: 7973535
    Abstract: A ground fault detection device includes a sense coil including a primary winding and a secondary winding to detect current in a line conductor and a neutral conductor. It also includes a capacitor in parallel with the secondary winding and a virtual inductor to form a resonance circuit having a signal proportional to the current and being indicative of a ground fault condition.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: July 5, 2011
    Assignee: Texas Instruments Incorporated
    Inventors: Artur J. Lewinski, Ross Teggatz, Thomas E. Cosby