Apparatus for continuously measuring temperature of molten metal and method for making same
US4984904A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 11, 1989 |
| Grant date | Jan 15, 1991 |
| Priority date | — |
| Expiry date | Apr 11, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K1/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for continuously measuring temperatures of molten metal including a thermocouple unit (A) and an immersion protection tube unit (B), wherein the thermocouple unit (A) comprises a thermocouple (1) having an end equipped with a temperature sensing element (8) and an opposite end connected to terminals (2), an insulator (9) of substantially one piece containing the thermocouple (1), a porcelain protection tube (6) of high airtightness containing the insulator (9), and a terminal box (3) having an extension sleeve (5) with which the upper part of the porcelain protection tube (6) is held and having a housing (20) which contains the terminals (2). The immersion protection tube unit (B) comprises an alumina-graphite protection tube (21), a holding sleeve (22) with a flange which is connected to the upper part of the alumina-graphite protection tube (21), and a connecting sleeve (26) connected with the holding sleeve (22). The porcelain protection tube is detachably inserted into the alumina-graphite protection tube (21) to allow easy removal of the thermocouple and alumina-graphite protection tube (21). Further, the alumina-graphite protection tube (21) is manufactured by a …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.