Motor vehicle headlamps

Claim 1

In a motor vehicle headlamp comprising a parabolic reflector adapted to be mounted with a horizontal axis on a vehicle, a light filament for dipped lighting located in the vicinity of the focal point of said reflector, a front glass, cut-out means for effecting cut-out of the dipped light beam according to a left and a right horizontal half plane of cut-out on either side of the central axis of said reflector and of said headlamp, the improvement comprising a plurality of juxtaposed, prismatic elements, each of said prismatic elements intersecting a small part of said dipped beam just below said right half plane of cutout, said small part of said beam projecting with respect to a reference screen a quadragular image having an upper inside corner and an upper horizontal boundary, each of said series of prismatic elements deflecting said part of said beam in a vertical direction and also in a transverse direction to translate said corner to coincide on said screen with an oblique segment, all of said prismatic elements intersecting and deflecting different parts of said dipped beam to create finally for said beam a central cut-out limit surface approximating stepby-step-wise on said screen said oblique segment and a lateral horizontal limit surface staggered in height relative to said unchanged left half plane of cut-out.