Stone picking machine

A stone picking machine adapted to be hauled by a tractor comprising:

• (a) a frame having a draft tongue adapted to be attached to the draw bar of the tractor;
• (b) a cross axle with a pair of wheels supporting the frame;
• (c) a box mounted on said frame;
• (d) means for picking stones in the field while the machine is being hauled by the tractor and for loading such stones in the box;
• and
• (e) means for raising said box upwardly and for tilting it sidewise to dump the stones into a truck or onto a pile of stones;
• said frame having a substantially rectangular fixed frame portion, a movable frame supporting said box and superposed on said fixed frame portion, the latter and said movable frame each having guide ways extending longitudinally thereof on each side of the box, and wherein said means for raising said box includes two pairs of scissors linkages located underneath each side of the box, both linkages in each pair being pivotally interconnected intermediate their ends, one of the linkages of each pair having one end pivoted on the fixed frame portion and the other linkage having one end pivoted on the movable frame on the ends of said frames where stone dumping takes place, and with the other end of the linkages of each pair carying rollers sliding in the guide ways of the fixed frame and in the guideways of the movable frame, the linkages which are slidably mounted in the movable frame being longer than the others so as to allow tilting of the box to dump sidewise, and power means for sliding said rollers in said guideways.