Motor vehicle back-up limit gauging method and apparatus

Details Motor vehicle back-up limit gauging method and apparatus Motor vehicle back-up limit gauging method and apparatus

1980-02-06

1981-03-24

Rosenberger, R. A.

Optics: measuring and testing

Range or remote distance finding

Triangulation ranging to a point with two or more projected...

33264, 116 28R, 356375, 356399, G01C 500

Patent

active

042577063

ABSTRACT:
Motor vehicle back-up limit gauging methods and apparatus are disclosed which include a pair of line-of-sight indicators affixed to the left side of the vehicle in such positions that the driver of the vehicle when seated in the driving position may establish a line-of-sight by aligning these indicators through the existing rear view mirror, and may then back his vehicle to a safe distance from a building wall or other marker by halting the backward progress of the vehicle when the aligned indicators coincide with the ground line of the wall, or with the marker.

REFERENCES:
patent: 1782988 (1930-11-01), Johnson
patent: 3199487 (1965-08-01), Heinkel
patent: 3485555 (1969-12-01), Morris
patent: 3704063 (1972-11-01), Guthrie
patent: 3765703 (1973-10-01), Voelkerding et al.
patent: 4054302 (1977-10-01), Campbell

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