Patents Assigned to Aerologic, Inc.
  • Altimeter and vertical speed indicator
    Patent number: 4539843
    Abstract: A combination altimeter and vertical speed indicator using digital displays. Digital logic technique are used to calculate vertical speed, eliminate drift in the vertical speed zero indication, correct vertical speed readings for altitude, and display altitude below zero. An automatic reading of barometric pressure setting for use as an offset is furnished at turn-on to permit initial setting of the instrument. Power to the instrument is pulsed to reduce consumption and permit long term battery operation.
    Type: Grant
    Filed: December 5, 1983
    Date of Patent: September 10, 1985
    Assignee: Aerologic, Inc.
    Inventor: Fred W. Wise