Illumination – Light source and modifier – Including reflector
Patent
1979-05-14
1981-01-20
Hayes, Monroe H.
Illumination
Light source and modifier
Including reflector
362299, 362347, F21V 700
Patent
active
042466318
ABSTRACT:
A vehicle headlamp for producing a Z-beam pattern has a reflector provided with a reflective area lying on a surface defined by rotating an ellipse about an axis which passes through the inner focus of the ellipse and which is inclined an acute angle (1.degree.-2.degree.) to the focal axis of the ellipse. A shielded filament for producing an inclined cut-off line to the beam is used and is orientated in the opposite sense to that in which it is orientated in a conventional headlamp for producing an inclined cut-off. Lensing at the front of the reflector splits the area of the basic beam pattern immediately below a horizontal portion of the cut-off line into parts which define upper and lower, mutually laterally displaced horizontal cut-off portions in the required Z-beam pattern. The lensing also utilizes a part-circular cut-off portion of the basic beam produced by the reflector and bulb to define an inclined portion of the Z-beam and depress and/or shifts other portions of the basic beam to reinforce other portions of the Z-beam.
REFERENCES:
patent: 1208456 (1916-12-01), Bell
patent: 1275120 (1918-08-01), Ballman et al.
patent: 2568494 (1951-09-01), Geissbuhler
patent: 2770716 (1956-11-01), Kingery
patent: 3350556 (1967-10-01), Franck et al.
Birt David A.
Draper Geoffrey R.
Hayes Monroe H.
Lucas Industries Limited
LandOfFree
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 Vehicle headlamp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vehicle headlamp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1770187