Triple-coil incandescent filament
US4316116A · kind A · utility
13Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1979 |
| Grant date | Feb 16, 1982 |
| Priority date | — |
| Expiry date | Dec 19, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01K1/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to multiple coiled incandescent filaments and more particularly to a single strand filament wire, coreless, triple-coil filament for an incandescent lamp having mandrel ratios in either or both its second or third coiling less than 1.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.