Geometrical instruments – Straight-line light ray type – Alignment device
Patent
1980-09-17
1982-09-21
Martin, Jr., William D.
Geometrical instruments
Straight-line light ray type
Alignment device
33203, 33274, 356155, G01B 11275
Patent
active
043499651
ABSTRACT:
Four alignment housings are mounted on a garage floor adjacent a conventional lift, so that when a vehicle has been elevated by the lift each of its four independently suspended four wheels will register with an alignment chart that is adjustably mounted on the face of each housing. A beam of light is directed through registering openings in each housing and its attached chart toward a mirror releasably mounted on each vehicle wheel. The mirrors reflect the beams back onto the associated charts, which are calibrated to provide camber, caster and toe-in readings. In one embodiment each housing contains a light source (for example a laser) which directs a beam onto a reflecting surface which is inclined at 45.degree. to the horizontal, so that it projects the beam at right angles out of the housing toward the adjacent wheel. In a second embodiment only one housing at each side of a vehicle contains a light source, and the associated reflecting surface reflects only part of a light beam toward a wheel and permits the remainder to pass out of the housing to a reflective surface in the other housing located on the same side of the vehicle. By making each reflecting surface horizontally adjustable on its housing it is possible to adjust the reflecting surfaces horizontally for use in connection with vehicles having different wheel base lengths.
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Martin, Jr. William D.
Security Trust Company of Rochester
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