Patents Assigned to Partlow Corporation
  • Patent number: 4120201
    Abstract: A thermocouple temperature measuring circuit has input terminals connectable to the thermocouple to form the cold junctions of the thermocouple. An input amplifier amplifies the thermocouple signal. A cold junction temperature compensation circuit includes means for sensing the temperature of the cold junctions and for providing an output signal which exhibits a predetermined coefficient between cold junction temperature and output signal magnitude. The output signals of the amplifier and compensation circuit are summed at a summing junction and provided to an output amplifier for supply to a temperature indicating meter. A bias means is also coupled to the summing junction for providing a bias suitable for adjusting the magnitude of the output signal in accordance with the low temperature to be indicated on the meter.
    Type: Grant
    Filed: March 18, 1977
    Date of Patent: October 17, 1978
    Assignee: Partlow Corporation
    Inventor: Thomas J. Wargo
  • Patent number: D270613
    Type: Grant
    Filed: January 15, 1981
    Date of Patent: September 20, 1983
    Assignee: Partlow Corporation
    Inventor: Paul W. Morgan