Geometrical instruments – Straight-line light ray type – Alignment device
Patent
1987-04-13
1988-07-26
Haroian, Harry N.
Geometrical instruments
Straight-line light ray type
Alignment device
33299, 33228, 3320318, 33DIG1, G01B 5255
Patent
active
047591331
ABSTRACT:
Method and apparatus for automotive wheel alignment in which a telescope is mounted with its axis precisely parallel with the end plane defined by the automotive wheel hub. A calibrated target is placed and centered directly in front of the telescope on its optical axis. This procedure is repeated for the wheel on the other side of the vehicle. The vehicle is then moved a distance, for example 50 feet, from the targets which are left in place. The telescope is again placed on the wheel hubs and the targets sighted. If both targets remain on the optical axis the wheels are in perfect alignment. If they are not, the calibrations on the target indicate the direction and extent of misalignment. The telescope or instrument is in precise coplanar relationship with the wheel hub by means of the telescope holder which is a body providing a base plane for contact with the end plane defined by the hub, and a V-block at its other end for holding the telescope, the apex of the V-block being parallel with the base plane of the holder.
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patent: 2972189 (1961-02-01), Holub
patent: 3091862 (1963-06-01), MacMillan
patent: 3487550 (1970-01-01), Herman et al.
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