Optics: measuring and testing – Range or remote distance finding – Triangulation ranging to a point with two or more projected...
Patent
1974-04-24
1976-04-13
Corbin, John K.
Optics: measuring and testing
Range or remote distance finding
Triangulation ranging to a point with two or more projected...
40129C, 350 97, G01C 300, G02B 512
Patent
active
039500985
ABSTRACT:
The invention describes a vehicle safety device which gives a visual indication to a driver of one vehicle when the distance between his vehicle and another vehicle is safe, unsafe, or where caution must be used for the speed at which he is driving. The device utilizes a plurality of different sized warning areas, each of which is assigned to a particular speed at which a warning is to be provided. The size of the area is larger for faster speeds and is smaller for slower speeds. In a first embodiment, the areas are illuminated windows which are assigned to particular speeds. If a particular window can be seen then at the assigned speed, the distance is too close. At a safe distance the window will merge with the windows assigned to slower speeds. In a second embodiment, the warning areas are darkened areas and for a particular speed, if the corresponding dark area can be seen, the distance is too close. At a safe distance, the darkened area will tend to disappear into the background. In a third embodiment, the warning areas represent different colors, and for a particular speed, if the corresponding colored area is visible, the distance at that speed is too close. When the colored area disappears, the distance is safe at that speed. In each embodiment if the area assigned to the particular speed can not be seen at that speed, the distance is safe. However, if the shape, color or design of the area is not clearly discernable then the driver should exercise caution. The driver can then determine whether he should reduce his speed and fall back; whether he can safely increase his speed and change lanes, or other such maneuvers to improve his degree of safety.
REFERENCES:
patent: 3419985 (1969-01-01), Berrier
patent: 3521391 (1970-07-01), Murai
Corbin John K.
Helfgott Samson
Rosenberger Richard A.
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