Incandescent illumination system
US5268613A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 2, 1991 |
| Grant date | Dec 7, 1993 |
| Priority date | — |
| Expiry date | Jul 2, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/406
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved incandescent lamp is disclosed that is specially adapted for use in combination with a concave reflector in providing a high-intensity beam of light. The lamp includes a plurality of linear, helically-wound filaments arranged with their longitudinal axes parallel with each other and spaced substantially uniformly around the lamp's central longitudinal axis. Orienting such a lamp with its longitudinal axis aligned with the reflector's longitudinal axis, and with the filaments near the reflector's general focal point, ensures that a high proportion of the emitted light is collected by the reflector to project the high-intensity beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.