Magnetic-blast arc extinguishing device having permanent magnets
US3953694A · kind A · utility
4Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1974 |
| Grant date | Apr 27, 1976 |
| Priority date | — |
| Expiry date | Aug 12, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/443
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An arc-extinguishing device having a pair of separable electrodes to draw an arc therebetween. A permanent magnet is associated with each electrode and the magnetic fields produced by the magnets are additive to rapidly transfer the arc to diverging parts of the electrodes thereby causing the arc to be lengthened and subsequently quenched. Advantageously the electrodes comprise a pair of offset contact rings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.