Patents by Inventor Frank R. Phelps

Frank R. Phelps 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).

  • Coaxial cavity for measuring level of liquid in a container
    Patent number: 4170135
    Abstract: A method and means for measuring the level of a liquid in a container. A coaxial cavity having a perforated outer conductor is partially submerged in the liquid in the container wherein the liquid enters and terminates the annular region of the coaxial cavity. The fundamental resonant frequency of the portion of the coaxial cavity which does not contain liquid is determined experimentally and is used to calculate the length of the liquid-free portion of the coaxial cavity and thereby the level of liquid in the container.
    Type: Grant
    Filed: September 26, 1978
    Date of Patent: October 9, 1979
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Glenn L. Booman, Frank R. Phelps