Geometrical instruments – Straight-line light ray type – Alignment device
Patent
1980-07-28
1982-06-29
Martin, Jr., William D.
Geometrical instruments
Straight-line light ray type
Alignment device
3320318, 33337, 356152, G01B 11275
Patent
active
043366589
ABSTRACT:
A method of effecting compensation of cooperatively coupled vehicle wheel aligner instruments since a shift or change of position of either one of a coupled pair of angle measuring transducer instruments can introduce changes in the signal values generated in both transducers which are representative of errors not heretofore recognized in prior alignment instruments. The method is directed to initially generating signals responsive to the position of rotation of vehicle wheels at each of two positions 180.degree. apart, simultaneously recording the generated responsive signals from each transducer instrument at each position of rotation of the vehicle wheels, and applying the recorded responsive signals at the two selected positions of wheel rotation upon the initial signals at the selected positions of wheel rotation such that the transducer instrument signals are mutually compensated for aberrations in the relationship of the mounting of the transducer instruments on the vehicle wheels upon being rotated. Apparatus is provided which is particularly unique to performing the steps in the method of this disclosure.
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Grossman James M.
Grubbs Dean O.
January Daniel B.
Hunter Engineering Company
Martin, Jr. William D.
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