Explosion proof high pressure discharge lamp
US5023506A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1989 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | Dec 28, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high pressure metal halide discharge lamp having a containment sleeve closed by a pair of metallic end caps for containing arc tube fragments in the event of explosive failure of the arc tube. Insulators secured in the end caps electrically insulate the arc tube lead-throughs from the end caps. Metallic tubes fixed on the lead-throughs butt against the insulators to secure the arc tube between the end caps and hold the end caps against the containment sleeve. Photoelectric emission from the end caps is avoided by electrically isolating the end caps or by providing a dielectric coating on end cap surfaces exposed to ultraviolet radiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.