Method of making an electric lamp having a gas filled outer jacket
US6749478B2 · kind B2 · utility
0Cited by
3References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2001 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Oct 11, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/395
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of making an electric lamp having a gas filled outer jacket wherein the space enveloped by the jacket may be flushed and filled with the desired fill gas without the use of a mechanical evacuation system including an exhaust pump. The space may be flushed and filled to obtain a controlled atmosphere within the space by inserting a gas dispensing probe into the space to displace the uncontrolled atmosphere with the fill gas. The final pressure of the fill gas which is sealed within the space may be controlled by controlling the temperature of the fill gas during the flush/fill procedure until the outer jacket is sealed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.