Dual circular fluorescent lamp
US6630780B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 19, 2001 |
| Grant date | Oct 7, 2003 |
| Priority date | — |
| Expiry date | May 15, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/322
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved dual circular fluorescent lamp having two or more lamp segments nested in an annular fashion to increase the lumen output. Each annulus is arranged concentrically where each annulus resides in an individual plane that is parallel to previous plane containing another annulus. Each annulus may be made from glass tubing where each annulus is comprised of a different diameter to maintain an equal volume for each annulus. In the preferred embodiment the circular rings coaxially non-coplanar and are arranged in a conical pyramid for typical use as a table or desk lamp, a pendant or ceiling mounted lighting fixture or a torchere floor lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.