Force lahr a vehicle headlight with a halogen - zweifadengluehlampe

摘要

1,219,125. Vehicle headlamps. ROBERT BOSCH G.m.b.H. 2 Feb., 1968 [3 Feb., 1967], No. 5322/68. Heading F4R. [Also in Division H1] A headlamp comprises a two-filament halogen bulb having a dipped beam filament 7 located in front of the focus 6 of the reflector and a main beam filament 8 located behind the focus, and a screen 9 having a first semi-cylindrical portion 12 disposed below the filament 7, a second semicylindrical portion 13 disposed above the filament 8, and a connecting web 11, the screen being of such a form that it has a Z-shaped configuration when projected on to a vertical plane. The screen may consist of a coating on the bulb or a separate sheet-metal member placed around the bulb, and the edges of the web 11 may lie in vertical planes, as shown, or be rearwardly inclined from top to bottom. The reflector is mainly parabolic with a conical vertex 2.