Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor
Patent
1989-03-20
1990-06-19
Yasich, Daniel M.
Thermal measuring and testing
Temperature measurement
By electrical or magnetic heat sensor
29612, 338 22R, 338 28, 374163, 374179, G01K 108, G01K 702, G01K 722
Patent
active
049348310
ABSTRACT:
A temperature sensing element (thermocouple, thermistor, or resistance temperature detector) for high temperature application is housed inside a metal tube, with lead wires to the temperature sensing element insulated from each other and the tube by a compactable mineral insulation material such as magnesium oxide. Initially the insulation material is in the form of a molded cylindrical preform with two lengthwise passages through which the lead wires are inserted. After the wires are inserted through the preform, the tube is placed around the preform and compressed to reduce its diameter. This crushes and tightly packs the insulation material around the lead wires. A strain relief and moisture seal may be provided at the end of the tube away from the temperature sensing element.
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Trade Literature Relating to Marshall Thermocouples, published prior to Mar. 19, 1989, Six(6) pages.
Claud S. Gordon Company
Yasich Daniel M.
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