High intensity discharge lamps, arc tubes and methods of manufacture
US6612892B1 · kind B1 · utility
5Cited by
6References
79Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2001 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | Mar 8, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A tipless arc tube for a high intensity discharge lamp and method of manufacture wherein the arc tube may remain open to an uncontrolled atmosphere during the step of hermetically scaling the arc tube. The novel arc tube and method obviate the need to perform any process steps within a controlled atmosphere. The pressure of the fill gas sealed within the arc tube may be controlled by controlling the temperature of the fill gas during the step of hermetically sealing the arc tube. The novel arc tube and method obviate the need to use a pump to control the fill gas pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.