Electric incandescent lamp for vehicle headlights
AssigneePatent-Treuhand-Gesellschaft Fur Elektrisch Gluhlampen Mbh
InventorsManfred Buhler, Klaus Wittmann
Life of this patent
Estimating the term…
Abstract
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.
Claims8
An electric incandescent lamp having at least one incandescent filament which is arranged within a light-transmissive lamp vessel, the at least one incandescent filament having a different pitch, wherein said at least one incandescent filament has, at its first end, a first pitch factor and, at its second end, a second pitch factor, the first pitch factor being less than the second pitch factor.
Dependencies are inferred from the claim text.