Patent · US Expired

Cold junction thermocouple compensator

US4133700A · kind A · utility

41Cited by
6References
1Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 21, 1977
Grant dateJan 9, 1979
Priority date—
Expiry dateDec 21, 1997

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH10N10/13
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

0.degree.COLD JUNCTION COMPENSATOR PROVIDES THE ELECTRICAL EQUIVALENT OF AN ICE-BATH REFERENCE THERMOCOUPLE, AT A SELECTED TEMPERATURE, FOR EXAMPLE O.degree. C. Input connectors, for engagement with conventional thermocouple units, form thermocouple junctions with conductors connected to a battery-operated Wheatstone bridge circuit adapted to supply an equal and opposite voltage output compensating for variations in the thermocouple junction output at different ambient temperatures. The compensator may be included in a module having input sockets or input plugs to coact with plugs or sockets of conventional thermocouple units. The compensator and battery may be encapsulated, or an accessible switch may be included in the battery circuit.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.