Linear filament assembly with refractory insulating support rod for halogen lamp
US4384235A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1980 |
| Grant date | May 17, 1983 |
| Priority date | — |
| Expiry date | May 20, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01K1/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A linear filament assembly for a halogen cycle incandescent lamp comprises a generally linear filament (usually a coil or coiled coil) supported at opposite ends by substantially rigid conductive leads, a rigid insulating rod, for example of quartz, extending generally parallel to the filament, and a plurality of supports extending between the rod and the filament, each support being fixedly secured to the rod, for example by having a coil part fitting over the rod and also being formed with a coil loosely exbracing the filament. The coils embracing the filament preferably include several closely spaced turns which loosely embrace part of the filament coil, without screwing into or engaging individual pitches of the latter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.