Patents by Inventor Frederick H. Hotchkiss

Frederick H. Hotchkiss 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).

  • Ultrasonic transducer assembly
    Patent number: 4918990
    Abstract: An ultrasonic transducer assembly for monitoring the quality of spot welds employs a transducer element joined to a support element and fitted within a conventional welding electrode assembly. The transducer assembly is biased against the interior surface of the welding electrode tip by a biasing element, preferably a compression spring. A sleeve, preferably composed of brass, surrounds the transducer element and is joined to the support element. A coaxial cable in communication with external instrumentation has a ground lead attached to the sleeve, and a signal lead attached to the transducer element.
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: April 24, 1990
    Assignee: Panametrics, Inc.
    Inventors: Kenneth A. Fowler, Dana R. Patch, Frederick H. Hotchkiss