Patents Represented by Attorney Ralph A. Johnston

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  • Miniature coaxial line to waveguide transition
    Patent number: 4463324
    Abstract: A miniature coaxial transmission line to waveguide transition particularly useful for frequencies beyond 40 GHz utilizes a projecting center conductor of a miniature coaxial line inserted directly into a waveguide. A metallic cylindrical sleeve is affixed to the end of the projecting center conductor to form a probe. The coaxial line is housed in the waveguide flange, and a plate is affixed across the cross section of the waveguide to provide a short circuit.
    Type: Grant
    Filed: June 3, 1982
    Date of Patent: July 31, 1984
    Assignee: Sperry Corporation
    Inventor: John C. Rolfs
  • Multiple beam lens transducer for sonar systems
    Patent number: 4450542
    Abstract: A compact apparatus for transmitting and receiving multiple sonar beams utilizes an acoustic lens to direct plane waves incident in desired directions to electroacoustic transducers positioned on spherical shell segments centered in the focal regions of the lens associated with the incident beams. The electroacoustic transducers transmit spherical waves that are transformed by the acoustic lens to plane waves emergent in the desired directions.
    Type: Grant
    Filed: March 5, 1982
    Date of Patent: May 22, 1984
    Assignee: Sperry Corporation
    Inventor: Jacob A. Kritz