Fail-safe mechanism for electric arc furnaces
US4140867A · kind A · utility
1Cited by
4References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1977 |
| Grant date | Feb 20, 1979 |
| Priority date | — |
| Expiry date | Dec 2, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B7/109
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric arc furnace has a plurality of electrodes each supported at one end of an arm, the other ends of which are each coupled to a column supported for vertical movement by means of a cable assembly. A fail-safe assembly is mounted adjacent the column and is coupled to the cable assembly. While tension is maintained in the support cable a linkage assembly normally restrains a biasing spring from moving a clamping wedge into engagement with the column to prevent vertical movement thereof. When tension is lost in the cable assembly the biasing spring is released to move the wedge into engagement with the column.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.