Patents by Inventor Frederick M. Hibbert

Frederick M. Hibbert 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).

  • Magnetic field strength indicator for use prior to a magnetic particle inspection procedure
    Patent number: 5055783
    Abstract: A field strength indicator for a magnetic particle inspection process is used to determine field strength and direction sufficient to identify real flaws in a test piece. The field strength indicator is a substantially flat shim having at least one series of artificial flaws formed therein by electric discharge machining. The artificial flaws have a geometry which render them compatible with real flaws and thus enable the magnetic field strength and direction to be properly set for conducting a magnetic particle inspection procedure. The surface containing the artifical flaws must be covered with a thin inert and non-magnetic coating for proper operation.
    Type: Grant
    Filed: September 5, 1989
    Date of Patent: October 8, 1991
    Assignee: Westinghouse Electric Corp.
    Inventors: William F. Jones, Alfred E. Hinton, Frederick M. Hibbert, Ernest E. Jackson