Antiglare bulb shade for a vehicle headlamp

Illumination – Vehicle steering mechanism or element moves pivoted lamp or... – Tie rod element controlled

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

362351, F21M 314

Patent

active

051958155

ABSTRACT:
An antiglare vehicle headlamp has an electric lighting bulb disposed in a lighting chamber defined by a lamp body and a cover lens secured thereto. A generally concave reflector is aimably mounted in the lighting chamber for reflecting the light rays from the bulb along the optical axis of the headlamp. The bulb has a substantially tubular envelope portion of vitreous material containing a filament, and a flat base portion formed in one piece with the envelope portion. As the base portion is conventionally formed by pinch sealing, a generally tapering part of indefinite shape and wall thickness is created between the envelope portion and the base portion. The indefinitely tapering part will refract in various directions the light rays emitted by the bulb filament. Should they be subsequently reflected by the reflector, such random light rays would not travel parallel to the optical axis, and some of them, issuing upwardly from the headlamp, would cause glare. A light shade is disposed between the bulb and the reflector for cutting off such glare causing ones of the light rays that have traversed the indefinitely tapering part of the bulb. Another embodiment is disclosed in which the lamp body has its inside surface rendered reflective, thereby dispensing with a separate reflector. The light shade is formed directly on the reflective surface of the lamp body.

REFERENCES:
patent: 4268895 (1981-05-01), Yabata
patent: 4321658 (1982-03-01), Deverrewaere
patent: 4882660 (1989-11-01), Liverance et al.
patent: 4893218 (1990-01-01), Dilk et al.
patent: 4922398 (1990-05-01), Muto
patent: 4926301 (1990-05-01), Liverance et al.
patent: 4945453 (1990-07-01), Serizawa et al.
patent: 5010458 (1991-04-01), Fraizer
patent: 5067054 (1991-11-01), Oshio et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Antiglare bulb shade for a vehicle headlamp does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Antiglare bulb shade for a vehicle headlamp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Antiglare bulb shade for a vehicle headlamp will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1347242

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.