Patents by Inventor Elizabeth J. Blessitt

Elizabeth J. Blessitt 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).

  • Undervoltage release device for a molded case circuit breaker
    Patent number: 6201460
    Abstract: An undervoltage release device for a circuit breaker is disclosed having an operating mechanism, a trip bar, line and load terminals, and a cover. The device includes a housing, a solenoid, upper and lower actuators aligned with a plunger of the solenoid and in selective contact with the trip bar, plunger and actuator reset levers mounted upon the solenoid frame, and pair of terminals in electrical contact with the solenoid coil and line terminals of the breaker, wherein the force of the solenoid corresponds to the line voltage. Also disclosed is a method for tripping a circuit breaker when line voltage drops below a selected value, in a circuit breaker having an operating mechanism and a trip unit with an intermediate latch.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: March 13, 2001
    Assignee: Siemens Energy & Automation, Inc.
    Inventors: Michael Troy Winslett, Russell Bryant Green, Mauricio Rodriguez, Elizabeth J. Blessitt