Incandescent electric lamp with partial light transmitting coating
US4227113A · kind A · utility
13Cited by
9References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1978 |
| Grant date | Oct 7, 1980 |
| Priority date | — |
| Expiry date | Oct 18, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01K1/325
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An incandescent lamp of a type in which infrared (IR) energy is to be reflected back to the filament. The lamp has one section which is coated with an IR reflecting material which also will transmit visible light and another section coated with material which has a high reflectivity to IR energy and a low transmissivity to visible light. The filament is mounted off-center of the optical image axis of the envelope and substantially all of the energy in the visible light range exits from the envelope in no more than two passes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.