Patents by Inventor Thomas A. Whittingham

Thomas A. Whittingham 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 radiation balance
    Patent number: 4104923
    Abstract: A radiation balance for testing the power of ultrasonic transducers involves a balance mechanism wholly immersed in transmission liquid in a windowed vessel to avoid surface tension effects. The mechanism comprises a target connected for movement with the coil of a moving coil/magnet assembly, such as from a galvanometer, and a null-seeking servomechanism energizes the coil in response to balance mechanism movement. The balance movement is about a vertical axis to avoid gravitational effects, and the target has neutral buoyancy.
    Type: Grant
    Filed: August 24, 1977
    Date of Patent: August 8, 1978
    Assignee: National Research Development Corporation
    Inventors: Thomas A. Whittingham, Michael J. Farmery