Wheel alignment apparatus

Geometrical instruments – Indicator of direction of force traversing natural media – Vehicle running gear – or headlight – inclination

Patent

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Details

3320314, G01B 524

Patent

active

043897932

ABSTRACT:
An improved wheel alignment apparatus for the measurement in four-wheeled automotive vehicles, of caster, camber, toe, steering axis inclination, and track of the front and rear wheels. The apparatus, which is employed with the wheels of the vehicle setting on right and left alignment runways defining a reference plane and direction of orientation for said vehicle, includes a tire contact wheel clamp for each front wheel and a rear wheel. A tire contact wheel clamp includes a set of orthogonally related gravity sensing electrolytic transducers, and switching means are provided for selectively recording or registering an output voltage proportional to tilt angle of caster, camber, toe, steering axis inclination and track of said wheels, as well as a phase indication of tilt direction. Logic means receive the selective output voltages, and an analog-to-digital converter provides a numerical displacement output where there is tilt angle. A read-out, or numerical display of the logic means is also provided.

REFERENCES:
patent: 2627123 (1953-02-01), Taber
patent: 2765540 (1956-10-01), MacMillan et al.
patent: 3392454 (1968-07-01), Haley
patent: 3409991 (1968-11-01), Davis et al.
patent: 3758958 (1973-09-01), Jordan
patent: 3855709 (1974-12-01), Hirmann
patent: 4302104 (1981-11-01), Hunter

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