Geometrical instruments – Indicator of direction of force traversing natural media – Vehicle running gear – or headlight – inclination
Patent
1981-05-19
1983-07-26
Stearns, Richard R.
Geometrical instruments
Indicator of direction of force traversing natural media
Vehicle running gear, or headlight, inclination
3320314, 3320318, G01B 7315
Patent
active
043947980
ABSTRACT:
A wheel alignment measuring apparatus of the invention has angle measuring instruments joined up with the input of an electronic signal processing unit. A first and a second angle measuring instrument (1, 2) are placed on a nearside and on an offside front wheel support turntable respectively for sending in each case a signal representative of the steering angle of the front wheels to the signal processing unit. The processing unit calculates therefrom the steering difference angle. A third and a fourth and furthermore a fifth and a sixth angle measuring instrument are so placed in the one case on the nearside and in the other case on the offside front wheel that by way of the signal processing unit on the footing of changes in the output signals of the first and the third and on the other hand of the second and fourth angle measuring instruments the caster of the nearside and of the offside front wheels may be calculated. On the basis of the changes of the output signals of the first and fifth and on the other hand of the second and sixth angle measuring instruments, the king pin angles of the nearside and of the offside front wheels may be calculated. By the apparatus of the invention readings may, therefore, be produced for the steering difference angle, the caster and the king pin angles in only one measuring operation.
REFERENCES:
patent: 2765540 (1956-10-01), MacMillan et al.
patent: 2831264 (1958-04-01), Weaver
patent: 2953857 (1960-09-01), Mineck
patent: 3409991 (1968-11-01), Davis et al.
patent: 3423839 (1969-01-01), Liskey
patent: 3758958 (1973-09-01), Jordan
patent: 4138825 (1979-02-01), Pelta
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