Patents by Inventor Stephan Robert Ramsey

Stephan Robert Ramsey 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).

  • Systems and methods for freewheel contactor circuits
    Patent number: 9786457
    Abstract: A circuit for use with a contactor including at least one contact is provided. The circuit includes a first segment including a voltage source, a first coil, a second coil, and a first transistor, wherein the first segment is configured to selectively conduct a closing current through the first coil, the second coil, and the first transistor to close the at least one contact. The circuit further includes a second segment including the first coil, a second transistor, and a first diode, wherein the second segment is configured to selectively conduct a holding current through the first coil, the second transistor, and the first diode to hold the at least one contact closed, and wherein the first diode is arranged such that substantially all current produced by the voltage source flows through the first coil.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: October 10, 2017
    Assignee: GENERAL ELECTRIC COMPANY
    Inventor: Stephan Robert Ramsey
  • SYSTEMS AND METHODS FOR FREEWHEEL CONTACTOR CIRCUITS
    Publication number: 20160203931
    Abstract: A circuit for use with a contactor including at least one contact is provided. The circuit includes a first segment including a voltage source, a first coil, a second coil, and a first transistor, wherein the first segment is configured to selectively conduct a closing current through the first coil, the second coil, and the first transistor to close the at least one contact. The circuit further includes a second segment including the first coil, a second transistor, and a first diode, wherein the second segment is configured to selectively conduct a holding current through the first coil, the second transistor, and the first diode to hold the at least one contact closed, and wherein the first diode is arranged such that substantially all current produced by the voltage source flows through the first coil.
    Type: Application
    Filed: January 14, 2015
    Publication date: July 14, 2016
    Inventor: Stephan Robert Ramsey