Apparatus for correcting the effect of variation in load on the direction of headlight beams of vehicles

Claim 1

In a wheeled vehicle having headlights, the combination of: a. means comprising transverse torsion bars adjacent the front and rear of said vehicle mounted for rotation in bearings supported by the body of said vehicle and rotatable in response to vertical movement of the wheel axles; b. longitudinally disposed connecting means between said torsion bars operative to move longitudinally in response to rotational movement of said torsion bars and including resilienT means comprising two springs adapted to be compressed or expanded longitudinally, c. headlights rotatably mounted on said vehicle for up and down movement, and d. actuating means comprising a transverse free rotating control shaft connecting said headlights to said longitudinally disposed connecting means whereby changes in load distribution of said vehicle reflected on said longitudinally disposed connecting means are imparted to said headlights so as to correct their positions with respect to a roadway, said connecting means including two small connecting rods, each one of them connected to one of said torsion bars at the front and at the rear of the vehicle, said two small connecting rods each having a free end which is fastened to an end of one of said springs, the other two ends of said springs being connected together by means of a connecting member on which there is articulated the first end of a transmission arm, the second end of which is fastened to a small connecting rod connected to said transverse free rotating control shaft, said transverse shaft carrying two control arms each one of which is connected to one point of one of the headlights of the vehicle, each headlight being fastened to the body of the vehicle in two other points forming an articulation around an axis parallel with the running path of said vehicle, said connecting member which connects the two springs being a cable, said cable comprising, over a part of its length, a slider which moves in translation inside a support fastened to the body of said vehicle, said slider comprising mechanically linked to said transmission arm, said mechanical linkage of the slider with the transmission arm being effected by means of a connecting rod, said rod being welded at one of its ends to one point of the slider, and having at its other end a ball and socket joint, which cooperates with the first end of the transmission arm.