Multi-wire self-diagnostic thermocouple

Details Multi-wire self-diagnostic thermocouple Multi-wire self-diagnostic thermocouple

1993-07-01

2000-02-01

Gorgos, Kathryn

Batteries: thermoelectric and photoelectric

Thermoelectric

Thermopile

136233, 374179, H01L 3528

Patent

active

060205512

ABSTRACT:
A multi-wire self-diagnostic thermocouple having three thermocouple elements enclosed in a sheath and insulated therefrom. The three thermocouple elements are electrically connected to each other to form three thermocouple junctions. An electronic circuit response to the three EMF signals generated by the three thermocouple junctions generates an error signal when the ratio between the three EMF signals differs from predetermined ratios signifying that the calibration of at least one of the three thermocouple elements has changed. In the preferred embodiment, the sheath is a metal sheath and the three thermocouple elements are fused to each other and to the metal sheath.

REFERENCES:
patent: 2609406 (1952-09-01), Barsy
patent: 2631220 (1953-03-01), Barsy
patent: 2696118 (1954-12-01), Petry
patent: 3048641 (1962-08-01), Erlebacher
patent: 3232794 (1966-02-01), Korton
patent: 3343589 (1967-09-01), Holzl
patent: 3449174 (1969-06-01), Kleinle
patent: 4224461 (1980-09-01), Snyder, Jr. et al.

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