Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor
Patent
1986-02-28
1988-01-12
Frankfort, Charles
Thermal measuring and testing
Temperature measurement
By electrical or magnetic heat sensor
374182, 439629, G01K 700, G01K 712
Patent
active
047187778
ABSTRACT:
In a temperature measurement system using a thermocouple connected to a pair of circuit wires coupled to a voltmeter for providing an output reading, an isothermal block (48) formed of alumina ceramic contains a series of openings (58-66) in linear juxtaposition. Metal connectors (68) located in two of the openings to interconnect the thermocouple and printed circuit wires of a circuit board (52) establish a reference junction. A temperature sensor (50), preferably a transistor, in a third opening measures the temperature of the isothermal block (48) to compensate the output reading for error created by the reference junction. The connectors (68) are in resilient contact with the interior wall of the isothermal block (48) to maintain good heat conductivity between the connectors and the temperature sensor (50). Portions of the connectors (68) extending outside the isothermal block (48) retain the isothermal block (48) to the circuit board (52).
REFERENCES:
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patent: 3648523 (1972-03-01), Kemper et al.
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patent: 4575175 (1986-03-01), Wilson
Mydynski Steven T.
Redfield, Jr. John M.
Sparrowhawk Bryan L.
Volberding Alfred T.
Becker Stephen A.
Frankfort Charles
John Fluke Mfg. Co. Inc.
Worth W. Morris
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