Optics: measuring and testing – Angle measuring or angular axial alignment – With photodetection remote from measured angle
Patent
1977-03-02
1979-04-24
Buczinski, S. C.
Optics: measuring and testing
Angle measuring or angular axial alignment
With photodetection remote from measured angle
250227, 2502376, 350 64, 356155, G01B 1126
Patent
active
041508971
ABSTRACT:
A light projector mounted on a front wheel of a vehicle uses a single laser to develop a beam which is split into a pair of light beams. The first light beam is projected to a calibrated mirror mounted on an adjacent rear wheel and is reflected to a target mounted near the projector on the front wheel of the vehicle so that the front wheel may be aligned with the rear wheel. The second light beam is projected to a mirror mounted on the other front wheel and is reflected to a target mounted adjacent the projector to check the toe of the front wheels. The target comprises a multichannel encoder which develops a plurality of Gray-coded binary signals in response to the position of the return beam. A rotating prism causes the light beams to sweep repetitively in a vertical plane so that the beams will strike the mirrors and the targets even when the projector is not mounted in a level position. A second prism may be moved into position to intercept the light beams and deflect them a predetermined angular amount so that the apparatus may be calibrated to correct for different spacings between the front wheels of the vehicles being checked.
REFERENCES:
patent: 3393455 (1968-07-01), MacMillan
patent: 3440426 (1969-04-01), Bush
patent: 3511551 (1970-05-01), Matulka
patent: 3533699 (1970-10-01), Hopkins et al.
patent: 3555285 (1966-04-01), Irving
patent: 3782831 (1974-01-01), Senften
patent: 3865492 (1975-02-01), Butler
patent: 3953134 (1976-04-01), Appel et al.
Chang Andrew K.
Lill Melvin H.
Roberts, Jr. Thomas E.
Wiederrich James L.
Buczinski S. C.
FMC Corporaton
Guernsey L. B.
Kelly R. S.
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