Geometrical instruments – Straight-line light ray type – Alignment device
Patent
1977-12-12
1979-03-06
Stearns, Richard R.
Geometrical instruments
Straight-line light ray type
Alignment device
3320313, 33299, 33DIG21, 356155, G01B 11275
Patent
active
041422996
ABSTRACT:
Two rectangular housings are mounted in a pair of spaced recesses in a garage floor to have cover means thereon moved to closed positions flush with the floor surface. Mounted in one end of each housing beneath a first cover is a rotatable wheel-supporting pad, which is slidable longitudinally of the housing, and is reciprocable vertically by a pneumatically operated scissors jack. Each housing has pivoted on its opposite end a second cover which carries on its inside surface a laser, a mirror, and a conventional alignment chart for denoting toe in, toe out, camber, etc., all of which items are disposed within one section of the housing when the pivotal cover is closed. When the pivotal covers are swung to upright positions, each laser directs a beam of light upwardly onto the associated mirror, which is inclined at 45.degree. to the vertical, so that the mirrors direct their beams horizontally through an aperture in the center of the associated chart and coaxially toward one another. The lasers, mirrors and charts are adjustably mounted on their respective pivotal covers so that the beams of light can be properly focused. The apparatus is particularly suited for use with a garage bay of the type having a lift for engaging the frame of an auto to raise and lower the latter.
REFERENCES:
patent: 3003246 (1961-10-01), Carrigan et al.
patent: 3758213 (1973-09-01), MacPherson et al.
patent: 3876310 (1975-04-01), Berndt
patent: 3951551 (1976-04-01), MacPherson
Spin Optic
Stearns Richard R.
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