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US 2020/0348185 A1Published application
Thermocouple Termination/Closure and Method
AssigneeTE Wire & Cable LLC
InventorPeter Cowley
Life of this patent
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Abstract
Aspects of this disclosure relate to a sheath closure for a dual-wall mineral insulated thermocouple cable. The new closure and methods are required to maintain the integrity of both the inner and outer sheaths or inner and outer walls of a dual-walled thermocouple design. As the inner and outer sheaths are different materials, they may require closure separately with no mixing of the sheathing materials during welding.
Claims19
A dual-wall mineral insulated thermocouple cable, comprising:
- a first conductor and a second conductor, wherein the first conductor and the second conductor extend within a composite sheath;
- the composite sheath extending a full length of the thermocouple cable, the composite sheath comprising a metal alloy outer sheath and a nickel-based inner sheath positioned between the first and second conductors and the metal alloy outer sheath, wherein the nickel-based inner sheath is provided in contact with the metal alloy outer sheath along an extending direction of the first conductor and the second conductor;
- and
- a sheath closure that includes an internal cap and an external cap positioned at an end of the thermocouple cable at a hot junction weld, wherein the first conductor and the second conductor form the hot junction weld at the end of the thermocouple cable, and further wherein the internal cap is made from a nickel-based material and the external cap is made from a metal alloy material.
1 more element
A dual-wall mineral insulated thermocouple cable, comprising:
- a first conductor and a second conductor, wherein the first conductor and the second conductor extend within a composite sheath;
- the composite sheath extending a full length of the thermocouple cable, the composite sheath comprising a metal alloy outer sheath and a nickel-based inner sheath positioned between the first and second conductors and the metal alloy outer sheath, wherein the nickel-based inner sheath is provided in contact with the metal alloy outer sheath along an extending direction of the first conductor and the second conductor;
- and
- a sheath closure laser welded to the composite sheath, the sheath closure including an internal cap and an external cap positioned at an end of the thermocouple cable at a hot junction weld, wherein the hot junction weld includes a laser weld, wherein the first conductor and the second conductor form the hot junction weld at the end of the thermocouple cable, and further wherein the internal cap is made from a same material as the nickel-based inner sheath and the external cap is made from a same material as the metal alloy outer sheath, wherein the internal cap is thicker than the external cap.
1 more element
Dependencies are inferred from the claim text.