Communications: electrical – Pedestrian guidance
Patent
1992-07-09
1995-04-11
Swarthout, Brent
Communications: electrical
Pedestrian guidance
340925, G08G 1095
Patent
active
054062764
ABSTRACT:
A cross-walk warning light system for warning drivers that a pedestrian has entered a cross-walk by shining a light, preferably a laser, having a beam parallel to the cross-walk. The cross-walk warning light system detects a pedestrian entering the cross-walk and activates a light that is aimed across the intersection, thus the driver sees this beam of light, which is projected across the intersection and is warned of the presence of a pedestrian in the cross-walk. The cross-walk warning light system is timed so as to deactivate the light after a predetermined interval of time. In the preferred embodiment, a first and an adjacent laser are spaced apart a distance substantially the width of the crosswalk, provide parallel beams of light on each side of the cross-walk. Also in the preferred embodiment, a second laser, disposed at the opposite end of the crosswalk, provides a second beam of light, aimed substantially co-linearly with the first. This allows at least a partial beam of light at each end of the cross-walk in the event a pedestrian blocks the first laser beam.
REFERENCES:
patent: 2700754 (1955-01-01), McCullough
patent: 3199073 (1965-08-01), Hilliker
patent: 4025922 (1977-05-01), Trawick, III
patent: 4570207 (1986-02-01), Takahashi et al.
patent: 4590474 (1986-05-01), Patterson et al.
patent: 5103223 (1992-04-01), Humphrey
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