Patents Examined by Stuart Dwork
  • Airspeed display scale with integral trend indication
    Patent number: 4415974
    Abstract: A digitally activated display scale in association with digital-electronic ircuitry, displays both the airspeed and airspeed trend of a landing aircraft. The digital/electronic circuitry process an analog voltage corresponding to an airspeed range of 80 to 179 knots to produce a digital number representative of the airspeed of the landing aircraft. The digital number is used to produce a continuous display of the airspeed and to indicate the trend of the airspeed as either increasing or decreasing.
    Type: Grant
    Filed: June 11, 1981
    Date of Patent: November 15, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Owen B. Laug, Charles C. Gordon, Robert O. Stone