Patents Assigned to S. L. Steffen
  • Temperature monitoring and temperature differential control device
    Patent number: 4175418
    Abstract: An electronic device is provided for use in monitoring and controlling the curing of live food products, specifically grain, in a storage environment. The device includes a first temperature sensing unit, a second temperature sensing unit, a comparator unit, a temperature differential comparator unit and a load switch responsive thereto, and a digital display unit for displaying the monitored temperatures and temperature differentials.
    Type: Grant
    Filed: May 8, 1978
    Date of Patent: November 27, 1979
    Assignee: S. L. Steffen
    Inventors: Sylvester L. Steffen, Duaine L. Bollwitt