Lamp with two internal capsules
US4912360A · kind A · utility
4Cited by
3References
16Claims
0Family size
Inventor
Key dates
| Filing date | Aug 25, 1988 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | Aug 25, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A double filamented lamp with one filament being a back up for the other filament may be formed with two internal capsules enclosed in a single exterior sheath. Each filament is securely positioned away from, and protected from the activity of the other filament. By securely coupling one capsule to the sheath, and the second capsule to the lamp base, both capsules are accurately positioned, and do not vibrate in the exterior sheath.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.