Shade arrangement for a dual filament bulb in a vehicle headlamp

Details Shade arrangement for a dual filament bulb in a vehicle headlamp Shade arrangement for a dual filament bulb in a vehicle headlamp

1991-07-30

1992-05-05

Husar, Stephen F.

Illumination

Vehicle steering mechanism or element moves pivoted lamp or...

Tie rod element controlled

362214, B60Q 104

Patent

active

051113686

ABSTRACT:
A vehicle headlamp having a paraboloidal reflector and an electric lighting bulb mounted in a lighting chamber. The paraboloidal reflector is formed to include a pair of vertically opposed flat portions extending therefrom toward a cover lens. The bulb has a vitreous envelope containing a primary filament for providing an upper beam, and an auxiliary filament for providing a lower beam. A shade is disposed between the bulb and the upper flat portion of the reflector in order to prevent the bulb from directly irradiating the upper flat portion of the reflector. Characteristically, the shade is inclined with respect to the optical axis of the headlamp, instead of being disposed parallel thereto, so as to extend in a direction in which the rays of light emitted by the axuillary filament of the bulb travels after having been reflected by part of the paraboliodal reflector, in order to make utmost use of the light rays emitted by the auxilliary filament for providing the lower beam.

REFERENCES:
patent: 4225903 (1980-09-01), Buchleitner
patent: 4268895 (1981-05-01), Yabata
patent: 4321658 (1982-03-01), Deverrewaere
patent: 4882660 (1989-11-01), Liverance et al.
patent: 4922398 (1990-05-01), Muto

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