Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Patent-treuhand-gesellschaft Fuer Elektrische Gluehlampen Mbh

Osram Gesellschaft MIT Beschrankter Haftung

Osram Gmbh

Manfred Bühler

Klaus Wittmann

Gerhard Behr

Christian Seichter

Sascha Zelt

The invention relates to a halogen incandescent lamp for motor vehicle headlamps with two incandescent filaments (), which are arranged within a lamp vessel (), wherein a first incandescent filament () is designed for operation with a higher electrical power than the second incandescent filament (), wherein the incandescent filaments () are constructed in such a way that their dimensions and/or their geometry are in each case matched to an operating voltage of at least 20 volts, and at least the second incandescent filament () is an incandescent filament in the form of a single coil. Preferably, both incandescent filaments () are in the form of incandescent filaments with a single coil, wherein the first incandescent filament () is used, for example, for producing the upper beam or lower beam and the second incandescent filament () is used for producing the daytime driving light or foglight.

Halogen incandescent lamp

The invention relates to an electric incandescent lamp, in particular a vehicle headlight, having at least one incandescent filament which is arranged within a light-permeable lamp vessel, the at least one incandescent filament having different pitch factors at its two ends. In order to increase the luminance at the light/dark boundary of the lower beam, that end of the incandescent filament which is near to the base has a lower pitch factor.

Electric incandescent lamp provided with different pitch factors for each end of a filament component

The invention relates to an incandescent lamp for motor vehicle headlights, having at least one incandescent filament () arranged inside the lamp vessel, and a shading device (). A coil exit () of the incandescent filament () is joined to an edge section () of the shading device () running substantially parallel to the coil axis, in order to ensure an improved suspension of the incandescent filament ().

Incandescent lamp for motor vehicle headlights

Growing community of inventors

Herbrechtingen, Germany

Manfred Bühler