Apparatus for detecting gaseous discharge in vacuum furnaces
US5193100A · kind A · utility
1Cited by
11References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1991 |
| Grant date | Mar 9, 1993 |
| Priority date | — |
| Expiry date | Jun 21, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D2021/0071
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An electrically heated vacuum furnace is provided with special lead-through devices for transmitting current to the heating elements. In order to recognize gas discharges which can occur between a lead-through and a tank wall, the insulation of the lead-through is surrounded by an auxiliary electrode. A thermocouple can also be used instead of an auxiliary electrode. A signal derived from the auxiliary electrode can be used to shut off the furnace power to avoid damage thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.