Side-welded fast response sheathed thermocouple

Details Side-welded fast response sheathed thermocouple Side-welded fast response sheathed thermocouple

1979-01-15

1981-02-24

Tupman, W. C.

Metal working

Method of mechanical manufacture

Assembling or joining

29591, 136233, B01J 1700

Patent

active

042519080

ABSTRACT:
A method of fabricating the measuring junction of a grounded-junction sheathed thermocouple to obtain fast time response and good thermal cycling performance is provided. Slots are tooled or machined into the sheath wall at the measuring junction, the thermocouple wires are laser-welded into the slots. A thin metal closure cap is then laser-welded over the end of the sheath. Compared to a conventional grounded-junction thermocouple, the response time is 4-5 times faster and the thermal shock and cycling capabilities are substantially improved.

REFERENCES:
patent: 3314129 (1967-04-01), Pugh
patent: 3607447 (1971-09-01), Davis
patent: 3939554 (1976-02-01), Finney

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