Patents by Inventor John Ambrose Ward

John Ambrose Ward 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).

  • Bimetal actuator
    Patent number: 4115750
    Abstract: An improved bimetal actuator is disclosed. A thin film resistor is fixed to the high expansion side of a bimetal element and, when energized, generates sufficient heat to actuate the bimetal. The resistor has a serpentine configuration formed by a continuous series of loops, each successive loop having a greater width from the fixed to the free end of the bimetal, to provide differential heating of the bimetal and thus a greater movement of its free end for the power dissipated in the resistor.
    Type: Grant
    Filed: September 12, 1975
    Date of Patent: September 19, 1978
    Assignee: AMP Incorporated
    Inventors: Niels Junior Hansen, John Ambrose Ward, William Hintze, David Charles Johnson