Headlight of a motor vehicle for both high-beam and low-beam operation
US5215368A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1992 |
| Grant date | Jun 1, 1993 |
| Priority date | — |
| Expiry date | Jun 29, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S41/164
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The headlight for a motor vehicle operable to produce a high-beam light distribution and a low-beam light distribution, has a reflector divided into an upper sector, a lower sector, a right sector and a left sector; an incandescent lamp with two axially-extending filaments mounted in the reflector, the filaments being spaced from each other and spaced approximately equally from the reflector peak; and a glass pane over a light aperture of the reflector. The upper sector and lower sector of the reflector are each shaped like a paraboloid-ellipsoid and the left sector and right sector are each parabolic. One filament is arranged along or close to and below the optic axis of the reflector to produce a high-beam light distribution when energized in operation and the other filament is arranged above the optic axis and to the right in relation to an issuing light beam to produce a low-beam light distribution in operation without additional optic devices in the glass pane covering the aperture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.