The Lucas Electrical Company Limited

Kenneth James Jones

Robert Arthur Hargroves

A lamp assembly has a housing of which part defines a parabolic or paraboloidal mirror and part defines part of an ellipsoidal reflector. A lamp filament is mounted at the inner focal point of the reflector and the focal point of the mirror coincides with the outer focal point of the reflector. The housing has a lens element defining a window through which light is directed from the mirror. In one embodiment, an additional mirror and lens element are provided for receiving light from the reflector. The additional mirror directing the light in the opposite direction to the light directed by the first mentioned mirror. In another embodiment, further mirrors are provided in the housing for increasing the horizontal spread of light.

Lamp assembly

The vehicle lamp unit comprises a housing having a window therein. Within the housing is an ellipsoidal reflector, and a concave mirror disposed to project light emanating from the reflector through the window. A mask is disposed at the outer focal plane of the reflector and is movable into and out of a masking position by means of a solenoid and connecting linkage. In a preferred arrangement, the reflector is mounted within the housing for pivotal movement about an axis which is inclined with respect to the horizontal.

Vehicle lamp unit

A lamp reflector comprising a dished body having a reflective inner surface, the body being elliptical in vertical axial section and having a different shape in horizontal axial section, which may be elliptical, arcuate or parabolic. The horizontal width of the body taken in a transverse vertical cross-section is greater than its vertical height. A vehicle lamp assembly comprising a reflector as defined above, a lens receiving light from the reflector, and a mask mounted between the two. The reflector and the mask or the mask alone may be movable relative to the lens.

Lamp reflectors and motor vehicle lamp assemblies incorporating same

The vehicle lamp assembly comprises a housing having a window therein. Disposed within the housing is a first ellipsoidal reflector, a mask, a second ellipsoidal reflector, and a concave mirror. The mask is disposed in the inner focal planes of the respective reflectors and is also disposed at the focal plane of the concave mirror. The second reflector is disposed on the opposite side of the mask to the first reflector and the mask on the side thereof facing the second reflector is silvered. When a filament in the first reflector only is illuminated, a dipped beam pattern is provided. When both of the filaments are illuminated, a full beam pattern is provided because the dipped beam pattern is modified by light from the second reflector being reflected off the mask towards the concave mirror.

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Sutton Coldfield, United Kingdom

Kenneth James Jones