High pressure metal vapor discharge lamp
US4777399A · kind A · utility
4Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1982 |
| Grant date | Oct 11, 1988 |
| Priority date | — |
| Expiry date | Feb 10, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S313/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high pressure metal vapor discharge lamp comprising a discharge tube with a pair of spaced main electrodes; a filling sealed in the discharge tube comprising a light emitting metal and a starting gas; a radioactive source comprising a radioactive substance entirely covered with an envelope of non-radioactive, heat- and corrosion-resistant material sealed inside the discharge tube, an outer tube enclosing the discharge tube, and circuit means for starting the discharge tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.