ng a lock on the drawbar and baching thetrailer slightly, forcing the center of gravity backward beyond the vertical plane of the axle. Upon movingforward, the pull of the drawbar brings the body bark into the horizontal position and locks it to the draw-bar automatically. Folding screw jacks serve… … This group shines typical semi trailers in use. (Upper) The fifth-wheel connection is here automatic and I he required rocking move-ment in the relations of the trailer to the motor unit is effected by tworollers which also steer the two units into or oul of hitch, running onmils with converging…
Automobiles · Aeronautics
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