Electric lamp with internal conductive reflector forming part of the circuitry thereof
US4791333A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1987 |
| Grant date | Dec 13, 1988 |
| Priority date | — |
| Expiry date | Jan 30, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric lamp, such as an infrared lamp, including a sealed outer envelope having a sealed end portion in which are positioned a pair of electrical conductors. Centrally positioned within the outer envelope is a sealed inner, light-transmitting envelope which includes therein a coiled tungsten filament. A pair of conductive members, coupled to the filament, project externally from opposing sealed end parts of the inner envelope. One of these projecting conductive members is electrically connected to a respective one of the electrical conductors while the other conductive member is electrically connected to the remaining conductor through the utilization of a thin, conductive molybdenum reflector which is positioned within the outer envelope adjacent the sealed, inner envelope. This reflector thus forms part of a series circuit for the invention and also functions to assist in maintaining the inner envelope at the described central position within the outer envelope, while simultaneously functioning to reflect radiant energy in the form of light and/or heat from the invention's inner envelope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.