Method for the manufacture of multilayered contacts for medium-voltage vacuum power circuit breakers
US4067379A · kind A · utility
6Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1976 |
| Grant date | Jan 10, 1978 |
| Priority date | — |
| Expiry date | Aug 11, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12097
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for producing multilayered contacts for medium-voltage vacuum power circuit breakers is provided comprising impregnating under vacuum with oxygen-free, liquid copper, a composite body of metal powders consisting of at least 35% by volume of a metal selected from the group consisting of chromium and vanadium and at least one metal selected from the group consisting of chromium, vanadium, cobalt, nickel and iron, in a crucible comprised of a metal selected from the group consisting of iron, steel, and chromium-nickel steel; and removing at least part of the crucible to expose a contact surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.