Protective structure for an immersion pyrometer
AssigneeSystem Planning Corporation
InventorsR. Michael Phillippi, David C. Greenspan, Ernie Tokay
Life of this patent
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Abstract
An immersion pyrometer having an outer casing comprising a mixture of graphite and a refractory metal oxide for contact with molten metal, an inner sheath enclosed by said outer casing, said inner sheath comprising a closed end metal tube wherein the closed end is in heat transfer contact with said outer casing, and a thermocouple within said inner sheath.
Claims20
Temperature-sensing apparatus comprising, in combination,
- (a) a sheath for enclosing a temperature-sensing element, said sheath comprising a closed-end metal tube;
- (b) a temperature-sensing element disposed within said sheath near the closed end thereof;
- and,
- (c) a casing having an outer surface for contacting high temperature molten media, and an inner cavity for holding said sheath, said inner cavity having an inner surface, an outer opening, and an inner closed end, said casing comprising a refractory metal oxide and graphite, and said graphite being present in a concentration from about 10 percent to about 35 percent. to provide good heat conductivity between said outer surface of said casing and inner surface of said cavity.
An outer protective casing for a thermocouple assembly, said casing having side wall(s) and an end wall, said walls having outer surfaces for contacting high temperature molten media and inner surfaces which define a cavity for holding said thermocouple assembly, said cavity having an open end for inserting and removing said thermocouple assembly, said casing comprising a refractory metal oxide and graphite, said graphite being present in a concentration from about 10 percent to about 35 percent to provide good heat conductivity between said outer and inner surfaces of said walls.
Dependencies are inferred from the claim text.