Metal halide arc discharge lamp
US7511406B2 · kind B2 · utility
0Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2006 |
| Grant date | Mar 31, 2009 |
| Priority date | — |
| Expiry date | Apr 21, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/827
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A metal halide arc discharge lamp (10) having a lamp envelope (12) and an arc tube (14) mounted within the envelope; a shroud (20) surrounding the arc tube (14); electrical lead-ins (26, 28) for supplying electrical energy to the arc tube (14); and a chemical fill within the arc tube to produce light when an arc is formed within the arc tube; the improvement comprising: the shroud (20) having a given thickness T and a given inside diameter ID having a relationship such that T is less than 2 mm and ID/T is less than 22.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.