Patents by Inventor Ralph H. Hartley

Ralph H. Hartley 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).

  • Electronic line sectionalizer with resettable actuator
    Patent number: 5172090
    Abstract: This sectionalizer comprises a movable current-carrying member carrying a first contact that is engageable with a second contact when the sectionalizer is closed. Overcenter toggle means holds the current-carrying member in its closed position when the toggle means is in an overcenter condition but is ineffective to hold the current-carrying member in said closed position when the toggle means is driven out of its overcenter condition. Electronic control means develops a pulse of electrical energy when predetermined conditions have occurred in the circuit through the sectionalizer.
    Type: Grant
    Filed: October 8, 1991
    Date of Patent: December 15, 1992
    Assignee: General Electric Company
    Inventors: Radhakrishna Ranjan, Ronald M. Reckard, Ralph H. Hartley, Tam Nguyen