Patents by Inventor Bruce C. Graham

Bruce C. Graham 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 particle method using water soluble adhesive for detecting flaws in magnetizable workpieces
    Patent number: 4338566
    Abstract: Method and composition for detecting flaws in a magnetizable workpiece such as a steel billet in which the workpiece is first heated to a temperature of at least 140.degree. F. (60.degree. C.) in a hot water bath, the heated workpiece is removed from the bath and then magnetized either before or after the application of an indicating composition. In accordance with the present invention, the composition includes ferromagnetic particles, a fluorescent pigment and a water compatible adhesive. The flaws in the workpiece, particularly at seams, cause clusters of the indicating composition to remain to the magnetized piece where they are readily visible to an inspector.
    Type: Grant
    Filed: January 18, 1980
    Date of Patent: July 6, 1982
    Assignee: Magnaflux Corporation
    Inventor: Bruce C. Graham