Patents by Inventor Joshua P. Mattocks

Joshua P. Mattocks 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).

  • Electrical switching apparatus with overvoltage protection
    Patent number: 8547673
    Abstract: An electrical switching apparatus includes a first terminal, a second terminal, a neutral conductor, separable contacts electrically connected between the terminals, an operating mechanism to open and close the contacts, a fused varistor electrically connected between the first terminal and the neutral conductor; and a trip mechanism including a trip coil cooperating with the operating mechanism to trip open the contacts. A second varistor is electrically connected in series with the trip coil between the first terminal and the neutral conductor. A thyristor is electrically connected in parallel with the second varistor. An overvoltage detection circuit is electrically interconnected with and causes the thyristor to energize the trip coil and cause the trip mechanism to trip open the contacts responsive to overvoltage between the first terminal and the neutral conductor.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: October 1, 2013
    Assignee: Eaton Corporation
    Inventors: Thomas E. Natili, David W. Stiffler, Joshua P. Mattocks
  • ELECTRICAL SWITCHING APPARATUS WITH OVERVOLTAGE PROTECTION
    Publication number: 20130135781
    Abstract: An electrical switching apparatus includes a first terminal, a second terminal, a neutral conductor, separable contacts electrically connected between the terminals, an operating mechanism to open and close the contacts, a fused varistor electrically connected between the first terminal and the neutral conductor; and a trip mechanism including a trip coil cooperating with the operating mechanism to trip open the contacts. A second varistor is electrically connected in series with the trip coil between the first terminal and the neutral conductor. A thyristor is electrically connected in parallel with the second varistor. An overvoltage detection circuit is electrically interconnected with and causes the thyristor to energize the trip coil and cause the trip mechanism to trip open the contacts responsive to overvoltage between the first terminal and the neutral conductor.
    Type: Application
    Filed: November 30, 2011
    Publication date: May 30, 2013
    Inventors: THOMAS E. NATILI, David W. Stiffler, Joshua P. Mattocks