High pressure sodium discharge reflector lamp
US4939408A · kind A · utility
5Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1988 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Jun 29, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/825
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high pressure sodium discharge reflector lamp having a blown glass outer envelope. The outer envelope contains a rare gas having a fill pressure slightly less than one atmosphere and a pressure at lamp operating temperature of approximately one atmosphere for implosion protection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.