Patent ID: 6280083
Filing Date: 2001-08-28
Classification: G01K

Abstract:
A thermocouple lance for measuring temperatures in molten metals, comprising a protective sheath with one closed end and one opened end wherein a filler and a pair of temperature-measuring alloy wires are contained, there being only one pair of wires, the pair being composed of two wires of different alloys joined with each other at their confronting ends to form a junction where the temperature is to be measured, and the protective sheath being formed in a multi-layered structure of layers different in composition and laid concentrically one on top of another in alternate layers,wherein filaments are embedded in a solid material of each layer of the multi-layered structure for the protective sheath, the filaments being oriented predominantly in the circumferential direction of the sheath, and boundary layers are interposed between confronting surfaces of any adjoining filament-embedded layers, the boundary layer being made of a material that is weaker in bonding power than the solid material of the filament-embedded layer.