Protective tube for a temperature sensor
US4871263A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 16, 1988 |
| Grant date | Oct 3, 1989 |
| Priority date | — |
| Expiry date | May 16, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K1/125
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A protective tube for a temperature sensor, such as a thermocouple assembly, comprises an inner metal tube which is open on either end, a thermally conductive plug for attaching to and closing one end of the tube, and a surrounding layer of refractory ceramic fiber material. The refractory ceramic fiber material is bonded to a portion of the outer surface of the metal tube and to a portion of an outer surface of the thermally conductive plug. In especially preferred embodiments, the refractory ceramic fiber material is preformed in individual tube sections which are conveniently slid over the outside diameter of the inner metal tube and, in some cases, a portion of the thermally conductive plug. Bonding is preferably achieved by a layer of refractory cement disposed between at least portions of the outer surfaces of the inner tube and thermally conductive plug and the inner surfaces of the tube sections. The thermally conductive plug is provided with an inner bore for receiving the temperature sensor. At least a portion of the outer surface of the thermally conductive plug remains exposed for contacting material having a temperature to be measured. Ceramic fiber sealing tape or ref…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.