Side-welded fast response sheathed thermocouple

Carr, Kenneth R

Title: Side-welded fast response sheathed thermocouple

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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.

Inventors:

Carr, Kenneth R ^[1]

Knoxville, TN

Publication Date:: Thu Jan 01 00:00:00 EST 1981

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

OSTI Identifier:: 863801

Patent Number(s):: US 4251908

Assignee:: United States of America as represented by United States (Washington, DC)

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: side-welded; fast; response; sheathed; thermocouple; method; fabricating; measuring; junction; grounded-junction; obtain; time; thermal; cycling; performance; provided; slots; tooled; machined; sheath; wall; wires; laser-welded; metal; closure; cap; compared; conventional; 4-5; times; faster; shock; capabilities; substantially; improved; substantially improved; thermal shock; thermal cycling; response time; fast response; thermocouple wires; times faster; measuring junction; substantially improve; sheathed thermocouple; closure cap; thermocouple wire; time response; cycling capabilities; cycling performance; /136/420/

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                    Carr, Kenneth R. Side-welded fast response sheathed thermocouple.  United States: N. p., 1981. 
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                    Carr, Kenneth R. Side-welded fast response sheathed thermocouple.  United States.

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                    Carr, Kenneth R. 1981.  
        "Side-welded fast response sheathed thermocouple".  United States.  https://www.osti.gov/servlets/purl/863801.

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@article{osti_863801,

  title        = {Side-welded fast response sheathed thermocouple},

  author       = {Carr, Kenneth R},

  abstractNote = {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.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/863801},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Thu Jan 01 00:00:00 EST 1981},

  month        = {Thu Jan 01 00:00:00 EST 1981}

}

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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 to 5 times faster and the thermal shock and cycling capabilities are substantially improved.
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