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US 4,225,744 AGranted
Fixed thermocouple for vacuum electric furnaces
AssigneeAbar Corporation
InventorsWilliam R. Jones, Prem C. Jindal
Life of this patent
Estimating the term…
Abstract
A fixedly mounted thermocouple for vacuum electric furnaces is described, which is particularly suitable for furnaces for nitrided or carburized case formation and which is particularly suited to avoid line of sight metallic deposition on the mounting from sputtering in the furnace and which could result in shorting, spaced shields being provided on the thermocouple mounting for this purpose.
Claims4
A fixed thermocouple assembly for vacuum electric furnaces having a hostile environment therein and containing electrically conductive ions capable of deposition on objects within the furnace comprising
- a thermocouple enclosing tube,
- sealing members exteriorly of said furnace for supporting said tube in said furnace,
- an electrical non-conductive tubular shield at the inner end of said tube,
- a spacer insulator member carried on said tube spaced from said tubular shield,
- a covering member for said thermocouple tube extending exteriorly of the furnace and in supporting relation to said spacer insulator member,
- at least one group of spaced shielding members of heat resistant electrical non-conducting material on said tube between said tubular shield and said spacer insulator member and extending outwardly from said tube for shielding said tube from deposition of electrically conductive material thereon,
- said shielding members comprising closely spaced readily replaceable discs of different diameters.
4 more elements
Dependencies are inferred from the claim text.