Boots – shoes – and leggings
Patent
1989-12-28
1991-08-06
Lall, Parshotam S.
Boots, shoes, and leggings
364577, 374172, 374179, 374181, 324105, G01K 714
Patent
active
050383035
ABSTRACT:
A method and apparatus accurately measures temperature even if a temperature difference exists between cold junctions of the main thermocouple. An auxiliary thermocouple is connected to one leg of the main thermocouple to provide cold junction compensation. Extension leads are connected to both cold junctions to take thermo emf from the thermocouple. The leads are made from a material having a thermoelectromotive characteristic in agreement with the thermoelectromotive characteristic of the other leg at low temperatures at which the cold junction compensation is provided. A converter converts the thermo emf of the composite thermocouple into temperature. The converter can separately set interpolations for converting the thermo emf of the auxiliary thermocouple into thermo emf of the main thermocouple and for coverting the sum of the converted thermo emf and the thermo emf of the main thermocouple into temperature.
REFERENCES:
patent: 4179745 (1979-12-01), Wuertele
patent: 4403296 (1983-09-01), Prosky
patent: 4466749 (1984-08-01), Cunningham et al.
patent: 4588308 (1986-05-01), Saito
patent: 4715003 (1987-12-01), Keller et al.
patent: 4901257 (1990-02-01), Chang et al.
patent: 4901258 (1990-02-01), Akiyama
Lall Parshotam S.
Mattson Brian M.
Yamari Industries, Limited
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