Patents by Inventor Liam P. Bradley

Liam P. Bradley 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).

  • Method and apparatus for dry testing water-immersible acoustic transducers
    Patent number: 4838070
    Abstract: A method of testing piezo-electric transducers includes locating one end (11) of a rod (10) of solid material over the active head (20) of the transducer, the rod (10) simulating the normal acoustic impedance presented to the transducer by the normal medium, in which the transducer is intended to operate, energizing the transducer and detecting the acoustic wave propagated through the rod at the other end of the rod. A loading rod for use in testing a piezo-electric transducer is an elongated solid body so dimensioned as to simulate the normal operating acoustic impedance presented to a piezo-electric transducer to be tested.
    Type: Grant
    Filed: July 9, 1987
    Date of Patent: June 13, 1989
    Assignee: Marconi Instruments Limited
    Inventor: Liam P. Bradley