Vacuum circuit interrupter contacts and shields
US5120918A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1990 |
| Grant date | Jun 9, 1992 |
| Priority date | — |
| Expiry date | Nov 19, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2033/66269
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Copper-chromium contacts and copper-ferrous material shields are used in vacuum circuit interrupters. The copper chromium contacts include a specific copper-iron non-abutting section, and an abutting layer preferably of copper-chromium with a layer thickness that constitutes about 50% of the total thickness of the contact which constitutes the abutting section of the contact structure. The shield for the contacts, are preferably formed of copper-ferrous material and "X" in which 1%-50% is ferrous material, and "X"=chromium 0% to 30% and ferrous material plus "X" is less than 60% of the total shield. The contacts and shields are formed by a powder metallurgical procedure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.