Triple coil incandescent filament
US4499401A · kind A · utility
11Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1983 |
| Grant date | Feb 12, 1985 |
| Priority date | — |
| Expiry date | Mar 3, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01K1/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to a single strand filament wire arranged into a triple-coil filament for an incandescent lamp. The triple-coil filament has selected dimensions that do not require recrystallization of the tungsten wire of the triple-coil filament prior to arranging the triple-coil filament within the incandescent lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.