Arc tube for high-pressure mercury/metal halide lamp
US4001623A · kind A · utility
12Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1975 |
| Grant date | Jan 4, 1977 |
| Priority date | — |
| Expiry date | Mar 18, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high-pressure mercury/metal-halide discharge lamp has the discharge electrodes offset below the central axis of the arc tube to increase the uniformity of the wall temperature and improve the performance of the lamp. The upper part of the arc tube wall is shaped to be nearer the electrodes at the ends and further from them at the center than in a cylindrical tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.