Low-pressure mercury vapor discharge lamp with electrode shield
US6274981A · kind A · utility
3Cited by
6References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 1999 |
| Grant date | Aug 14, 2001 |
| Priority date | — |
| Expiry date | May 4, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/0672
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A low-pressure mercury vapor discharge lamp is provided with a discharge vessel and a first and a second end portion (12a). The discharge vessel encloses a discharge space provided with a filling of mercury and a rare gas in a gastight manner. Each end portion (12a) supports an electrode (20a) arranged in the discharge space. An electrode shield (22a) encompasses the electrodes (20a) and is covered with a material which reacts with or forms an alloy with alkaline earth metals, which material is released by the electrode (20a).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.