Patents by Inventor Thomas Jude Herrick

Thomas Jude Herrick 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).

  • Fault detection system including a capacitor for generating a pulse and a processor for determining admittance versus frequency of a reflected pulse
    Patent number: 5650728
    Abstract: A system comprising a portable apparatus and employing a method of admittance versus frequency analysis to detect the existence of a fault in a de-energized electrical line regardless of whether the line contains branches. The portable apparatus comprises a capacitor unit detachably connected to a de-energized line, ground or a neutral conductor, a switch unit detachably connected to a de-energized line, the de-energized line being tested, and an insulated cable connecting the capacitor unit to the switch unit. The switch unit comprises a discharge switch that can be activated by pulling on the hot line tool. The capacitor unit comprises a capacitor which is discharged into the electrical line via the insulated cable and the switch unit when the discharge switch is activated to create a pulse.
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: July 22, 1997
    Assignees: Hubbell Incorporated, University of Missouri
    Inventors: David Adelbert Rhein, Lloyd Ronald Beard, Gerald Bernard Roberts, Thomas Jude Herrick