Flat circular foil-filament lamp
US4585971A · kind A · utility
5Cited by
6References
1Claims
0Family size
Inventor
Key dates
| Filing date | Dec 18, 1984 |
| Grant date | Apr 29, 1986 |
| Priority date | — |
| Expiry date | Dec 18, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01K1/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An incandescent electric lamp with a flat circular foil filament which emits a circular beam of maximum intensity in the direction perpendicular to the filament. The filament is mounted inside a ring conductor and has a reflective rear plate which returns heat to the filament as means of increasing the incandescence.Current flows from a center post conductor through the filament to a ring conductor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.