Patents by Inventor Richard C. Beetham

Richard C. Beetham 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).

  • Bond strength measurement of composite panel products
    Patent number: 4856334
    Abstract: The invention is a method for the on-line nondestructive determination of the internal bond strength of composite panel products. The method involves impinging an ultrasound pulse against the panel by a first transducer and receiving a transmitted pulse at a second transducer. The received signal strength, temperature and panel thickness are entered into an algorithm from which the internal bond may be calculated. Preferably the receiving transducer is located on the opposite side of the panel and displaced somewhat from the first transducer. The inclusion of temperature and panel thickness as independent variables greatly improves the accuracy over that available from uncorrected ultrasound testing.
    Type: Grant
    Filed: April 6, 1988
    Date of Patent: August 15, 1989
    Assignee: Weyerhaeuser Company
    Inventors: Dwayne M. Shearer, Richard C. Beetham, Frank C. Beall, John M. Rodgers
  • Bond strength measurement of composite panel products
    Patent number: 4750368
    Abstract: The invention is a method for the on-line nondestructive determination of the internal bond strength of composite panel products. The method involves impinging an ultrasound pulse against the panel by a first transducer and receiving a transmitted pulse at a second transducer. The received signal strength, temperature and panel thickness are entered into an algorithm from which the internal bond may be calculated. Preferably the receiving transducer is located on the opposite side of the panel and displaced somewhat from the first transducer. The inclusion of temperature and panel thickness as independent variables greatly improves the accuracy over that available from uncorrected ultrasound testing.
    Type: Grant
    Filed: May 26, 1987
    Date of Patent: June 14, 1988
    Assignee: Weyerhaeuser Company
    Inventors: Dwayne M. Shearer, Richard C. Beetham, Frank C. Beall