High-pressure discharge lamp
US5008583A · kind A · utility
4Cited by
2References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 12, 1989 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Jul 12, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/54
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a high-pressure sodium discharge lamp provided with a discharge vessel having a longitudinal axis 1 and a diameter D. The discharge vessel is enclosed by an outer envelope. Within the outer envelope a starting circuit is arranged, which has at least a glow starter. According to the invention, the outer envelope is a clear outer envelope and the glow starter is arranged so as to be laterally displaced over a distance of at least D/2 with respect to the discharge vessel. Moreover, the glow starter is shielded for the major part with respect to the discharge vessel by means of a heat shield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.