Electrodes of vacuum switch
US4698467A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1985 |
| Grant date | Oct 6, 1987 |
| Priority date | — |
| Expiry date | Oct 24, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/6643
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrode structure disposed in a vacuum switch generally comprises a pair of relatively separable electrodes and a pair of contacts provided on the opposing surfaces of the electrodes and surface areas of the contacts are selected to be smaller than the surface areas of the electrodes. The vapor pressure P.sub.0 and specific resistance .rho..sub.0 of the electrode material and the vapor pressure P.sub.1 and specific resistance .rho..sub.1 of the contact material are held in a relation ##EQU1## and values representing specific heat, heat of fusion and heat of evaporation of the contact material are 100.+-.20% of those of the electrode material except a portion on which the contact material is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.