Patents Assigned to Waddington Electric, Inc.
  • Ultrasonic sensing and control apparatus
    Patent number: 4384665
    Abstract: A stock loop controller is disclosed which measures the round trip time of an ultrasonic signal transmitted to the stock loop and its return echo to generate a digital signal proportional to such time. The digital signal is converted to an analog signal and compared with a voltage reference across an amplifier. The resultant difference signal is used to control a motor operating the stock loop "take-up" or "feed-out" mechanism.
    Type: Grant
    Filed: May 4, 1981
    Date of Patent: May 24, 1983
    Assignee: Waddington Electric, Inc.
    Inventor: John E. Waddington