Patents by Inventor James E. Mumper

James E. Mumper 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).

  • Patent number: 4129850
    Abstract: A balanced sonar transducer comprising a front radiating mass and a rear mass coupled thereto via a ceramic transducer element which imparts vibrational motion to the front and the rear masses. The front and the rear masses are secured to a bulkhead via a tie rod which passes through the rear mass and the transducer element and is secured in the front mass. A disc spring is placed between the bulkhead and the rear mass and has a compliance of a suitable magnitude to resonate with the rear mass at a frequency which approximates the resonant frequency of the front mass with the compliance of the tie rod. The approximate matching of the resonant frequencies provides for a balancing of the stresses applied to the transducer element which insulates the transducer element from a vibrational acceleration imparted to the transducer assembly by vibrations of the ship and of the bulkhead to which the transducer assembly is affixed.
    Type: Grant
    Filed: February 3, 1975
    Date of Patent: December 12, 1978
    Assignee: Raytheon Company
    Inventor: James E. Mumper