Patents by Inventor Leolan H. Fry, Jr.

Leolan H. Fry, Jr. 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).

  • Long life coaxial sparker for underwater sound source
    Patent number: 6018502
    Abstract: An efficient sparker for a pulse powered underwater acoustic source for msweeping is capable of repetitive discharges at about 15 Hz for at least one hour without replacement or maintenance. The sparker has a tubularly-shaped cathode spaced apart from an elongate anode that coaxially extends the length of the tubularly-shaped cathode and a cylindrically-shaped insulator that fills the space between the cathode and anode. The cathode, anode, and insulator are secured to a collar and are shaped to have minimal drag when towed through the water at speeds up to 35 knots. The configuration and selection of fabrication materials for the sparker assure that a nominal constant gap is maintained between the cathode and anode.
    Type: Grant
    Filed: January 27, 1998
    Date of Patent: January 25, 2000
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Leolan H. Fry, Jr.