Patents by Inventor Norman Yarworth

Norman Yarworth 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).

  • Motor protector for high temperature applications and thermostat material for use therein
    Patent number: 4041432
    Abstract: A motor protector for use in motors having a high operating temperature employs a snap-acting composite thermostat element to actuate the protector wherein the multilayer thermostatic material embodied in the element has an electrical resistivity value from 20 ohms/c.m.f. to 400 ohms/c.m.f. and a flexivity value from 90 .times. 10.sup.-.sup.7 inches per inch per degree Fahrenheit to 110 .times. 10.sup.-.sup.7 inches per inch per degree Fahrenheit to provide for better calibration, longer life, and better space control in the protector for use in motors having higher operating temperatures.
    Type: Grant
    Filed: September 16, 1975
    Date of Patent: August 9, 1977
    Assignee: Texas Instruments Incorporated
    Inventors: Norman Yarworth, Radi Pejouhy