Patents by Inventor Francis S. Doherty

Francis S. Doherty 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).

  • Non-contact arc detection apparatus and method
    Patent number: 8497688
    Abstract: The present invention relates to a non-contact arc detection, recognition, and warning apparatus for the detection of arcing in an electrical system. The apparatus includes an electric field detector having first and second electric field sensors adapted to sense electric fields; a magnetic field detector having a multi-axis magnetic field sensor adapted to detect a magnetic field; and a digital signal processor. The digital signal processor compares and enhances signals obtained from the electric field detector and the magnetic field detector and creates a response to alert a user of the presence of arcing.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: July 30, 2013
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Douglas Stewart Dorr, Kermit O. Phipps, Thomas A. Cooke, Francis S. Doherty, Neil Weisenfeld
  • NON-CONTACT ARC DETECTION APPARATUS AND METHOD
    Publication number: 20110254534
    Abstract: The present invention relates to a non-contact arc detection, recognition, and warning apparatus for the detection of arcing in an electrical system. The apparatus includes an electric field detector having first and second electric field sensors adapted to sense electric fields; a magnetic field detector having a multi-axis magnetic field sensor adapted to detect a magnetic field; and a digital signal processor. The digital signal processor compares and enhances signals obtained from the electric field detector and the magnetic field detector and creates a response to alert a user of the presence of arcing.
    Type: Application
    Filed: April 14, 2010
    Publication date: October 20, 2011
    Applicant: ELECTRIC POWER RESEARCH INSTITUTE, INC.
    Inventors: Douglas Stewart Dorr, Kermit O. Phipps, Thomas A. Cooke, Francis S. Doherty, Neil Weisenfeld