Abstract: A guidance system for an agricultural tractor includes a furrow feeler which depends from a horizontal shaft so that the shaft rotates about a horizontal axis aligned with the direction of draft. Misalignment causes rotation of the horizontal shaft, which through arms and switches causes an electric motor to turn in a first or second direction as is appropriate to cause the tractor to follow the furrow. The motor is connected by suitable transmission to a yieldable tire which engages the steering wheel of the tractor so that rotation of the tire from the motor will cause the tractor to be steered from the steering wheel. A gauge wheel forms a track furrow so that in future operations, the tractor follows the precise path as before.

Abstract: A tractor includes front wheels and rear wheels. A three-point hitch connects a yoke to the tractor. The yoke is stabilized by stabilizer arms which are connected under the rear tractor axles and to the frame of the tractor forward of the rear tractor axles. The stabilizer arms lock up the yoke so that it is rigidly fixed to the tractor when an earth working implement tilling the soil is stressing the yoke. The stabilizer arms are connected to the yoke by chain links which permit the yoke to be raised and lowered by the three-point hitch, but which prevent any lateral movement or flexibility to the yoke. This rigidity in part is by having the chain link connection of each stabilizing link straddle the connection of the three-point hitch to the yoke. In addition, the two stabilizing arms are connected by a cross brace which is bolted in place. The cross brace may be unbolted in the event a power takeoff shaft is to be used, which would otherwise be blocked by the cross brace.

Abstract: A tractor includes front wheels and rear wheels. A three-point hitch connects a yoke to the tractor. The yoke is stabilized by stabilizer arms which are connected under the rear tractor axles and to the frame of the tractor forward of the rear tractor axles. The stabilizer arms lock up the yoke so that it is rigidly fixed to the tractor when an earth working implement tilling the soil is stressing the yoke. The stabilizer arms are connected to the yoke by chain links which permit the yoke to be raised and lowered by the three-point hitch, but which prevent any lateral movement or flexibility to the yoke. This rigidity in part is by having the chain link connection of each stabilizing link straddle the connection of the three-point hitch to the yoke. In addition, the two stabilizing arms are connected by a cross brace which is bolted in place. The cross brace may be unbolted in the event a power takeoff shaft is to be used, which would otherwise be blocked by the cross brace.

Abstract: Stabilizng arms are applied to an agricultural tractor having a three point hitch with a quick hitch frame. Specifically, a belly plate is added to the frame beams about half way between the front axle and the rear axle. A horizontal frame draw bar extends from the belly plate to a pivot pin mounted by a clamp below the rear axle housing. The stabilizing arms extend from the pivot pin below the axle housing back to a quick hitch frame pin, which is an extension of the quick hitch pin and extends outboard of the quick hitch frame on each side thereof. A cross brace extends between the stabilizing arms to form a rigid stabilizing frame. Because the pivot pin below the axle is not coaxial with the pin by which the normal draft links are connected to the differential housing of the tractor, it is necessary that the stabilizing arms be pivoted so that the quick hitch frame can be mounted to have its normal motion to raise and lower the tillage implements connected to the quick hitch frame.

Abstract: A large coulter is laterally rigidly connected to a tractor. The coulter prevents lateral shifts and jerks of the tractor, thereby eliminating the tractor as a source of lateral shifts of drafted earthworking equipment. When also laterally rigidly connected to the drafted implement, the coulter practically eliminates lateral shifts of the implement as well. On a first pass, such as when plowing furrows to form beds for row crops, the coulter cuts a slot in the ground. During subsequent passes, driving the tractor over the same pairs of furrows, the coulter tracks this slot, causing the drafted earthworking implement to follow a path matching that of the implements used on the first pass. A draft member and the coulter frame also connect the drafting force exerted by the implement at a point on the tractor forward of the tractor rear axles, thus enhancing draft capabilities and fuel efficiency of the tractor while retaining the conventional rear hitch, and stabilizing the tractor as described above.

Abstract: For cutting the roots of weeds in agricultural fields, rolling knives in the form of flat, circular plates with sharp, peripheral edges are journaled to struts connected to a tool bar drafted in a direction of draft. The knives rotate about knife axes that are normal to knife planes containing their sharp edge. All knife axes are about 45.degree. from vertical. For bedded fields, the rolling knives are preferably connected to the tool bar in knife sets of two for each soil bed, with the knives of each set engaging opposite sides of each bed. As the rolling knives roll within the soil, their sharp edges sever the roots of weeds. In an alternate embodiment, a vertical stabilizer plate is rolled opposite each rolling knife to stabilize the soil therebetween. In another embodiment, each strut includes a hinge that has a hinge axis substantially within the knife plane. The knives swing about the hinge axes and trail in the direction of draft following the path of least resistance through the soil.

Abstract: The invention is directed to a lightweight portable "tree stand" or hunting sling which is utilized to hoist a hunter appreciably above ground level and support the hunter thereat, the "tree stand" including a seat rest and a back rest of fabric material, the seat rest having a medial seat portion and opposite end portions to the latter of which are connected a foot rest in the form of a rope, means for adjustably connecting the seat portion of the seat rest to the back rest, the back rest having two upwardly directed spaced arms connected by ropes to a hoist while additional ropes connect the hoist to the arms of the seat rest, and another rope passing through openings of the back rest for manipulating the "tree stand" through 360 degrees.