Metal halide lamp
US6288491A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1999 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | Apr 9, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/827
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To achieve the foregoing objects and in accordance with the purpose of the invention, as embodied and broadly described herein, the metal halide lamp of this invention comprises a vitreous arc tube containing an ionizable medium and having electrodes sealed into opposed ends of the arc tube. An outer envelope encloses the arc tube and includes one end accommodating inleads sealed therethrough. A base is attached to the outer envelope having input terminals, the input terminals being connected to the inleads which in turn are connected to the tungsten electrodes. A mount is provided to support the arc tube within the outer envelope. The ionizable medium will include mercury, a metal halide, and an inert gas selected from the group consisting of argon, krypton, and xenon and mixtures thereof. In addition, a starting circuit having an open circuit voltage of at least 200 volts RMS will be provided. The inert gas having a pressure of at least about 70 torr.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.