Incandescent lamp having two lead-in conductors sealed within one end thereof
US4623817A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1985 |
| Grant date | Nov 18, 1986 |
| Priority date | — |
| Expiry date | Jan 16, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01K5/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A tungsten-halogen lamp including a tubular quartz envelope wherein both of the lead-in conductors designed for providing electrical energy to the lamp's coiled filament are strategically positioned within a single, press-sealed end portion of the lamp's envelope. Electrical connections to the lamp may thus be provided at only one end thereof to thereby facilitate positioning and connection of the lamp within a photocopier or similar machine. The lamp is suited for high wattage applications (i.e., about two-hundred watts per linear inch of filament or greater) by positioning the inner portion of one of the lead-in conductors externally of the coiled filament supports and thus at spacing sufficient to prevent excessive heating of the inner portion and surrounding, tubular insulative member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.