Gas-filled arc discharge lamp and a method of making thereof
US6850008B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 8, 2002 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | Apr 12, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/68
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A gas discharge lamp having a translucent envelope enclosing a light emitting assembly that includes a baffle and an anode separated by one or more spacers made of an electrically insulating material such as ceramic, which are oriented towards a heated cathode to receive electrons emitted therefrom. Each spacer has a front surface, a rear surface, a top surface and a bottom surface including a transverse cavity formed between the front and rear surfaces to permit electrons to flow through. The cavity extends from a first through-hole in the front surface to a second through-hole in the rear surface of the spacer. Further, the cavity includes a gap for allowing conductive materials that may sputter or evaporate from the anode or the baffle to escape from the cavity to prevent short circuiting between the anode and the baffle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.