Abstract: Eccentric wheels of a compound archery bow are mounted in respective bow limb receiving slots for pivotal movement between a rest draw angular position and a full draw angular position. Each wheel pivot axis extends transversely across the respective wheel receiving slot and is spaced an effective preset slot depth distance A from the respective slot root. Each wheel has a bowstring portion with a peripheral bowstring track formed therein for receiving a section of a bowstring. The peripheral bowstring track has a progressively increasing moment arm radius relative to the respective pivot axis from a rest draw segment to a full draw segment. The moment arm radius from the pivot axis to the full draw segment of the bowstring portion is greater than the effective slot depth distance A to extend the effective length of the respective flexible power limb at the full draw angular position by a distance greater than the slot depth.

Abstract: The process serves for the loosening of soil in the subsoil and topsoil areas and for introduction of fertilizers as well as subsoil loosening and/or for soil cultivation as well as the introduction of other additives with the use of digging tools 2, 2', and 2" by which the soil is broken up. In this case, the digging edge of digging tool 2, 2', and 2" is guided in an elliptical motion and this motion is superimposed by a straight motion, i.e., the driving motion. A cycloid is therefore produced for the digging edge. The longer axis of the ellipse in this case is directed from the soil surface into the soil in this manner and exhibits an angle to the travel direction. The additive, such as, for example, fertilizers, can be blown into the fissure forming behind tool 2.

Abstract: A granular dispenser for a planter having a closure means for sealing the hopper which is operated by a hydraulic cylinder which is connected in parallel with the hydraulic cylinder normally provided on a planter for raising and lowering the planter tool bar so that the closure means is fully closed before the planter begins to raise and remains closed until the planter is fully lowered.

Abstract: The invention relates to a toy gun for projecting elastic bands. The gun is provided with a handle portion, a barrel portion and a trigger assembly. A launching assembly is mounted on the rearwardly extending part of the handle portion and is fixedly attached thereto. A lateral extension of the trigger assembly slides along the upper face of the rearwardly extending part and frictionally contacts the elastic bands which are positioned within a plurality of launching notches formed in the launching assembly at an angle to vertical.

Abstract: A caliper-jaws type release which includes a cam-shaped pin for pivotally holding one of two opposing jaws in the release holder. The cam-shaped pin has a head portion, an eccentric middle portion of smaller diameter than the head portion and a concentric end portion of smaller diameter than the middle portion. The head portion has a recess in its top surface for receiving a lever having a complimentary projection. Inserting the lever into the complimentary recess permits the cam-shaped pin to be rotated. The eccentric portion pivotally engages the jaw. Rotating the cam-shaped pin with the lever causes the jaw to change position relative to the opposing jaw.

Abstract: A trailing harrow attachment is pivotally connected to the aft end of support arms for rotation about a transverse axis between a field-working position wherein the harrow tines engage the soil, and a non-operative position wherein the harrow is rotated about the axis by approximately 180.degree. so that the tines extend away from the ground to provide better trash flow and ground clearance. The angles that attach the harrow to the trailing arms include apertures located an equal distance radially outwardly on opposite sides of the axis so that the harrow may be pinned at the same location on one of the support arms in either the field-working or the non-operative position.

Abstract: An edger having a main frame, at least one front wheel fastened in the front portion of the main frame, two rear wheels fastened in the rear portion of the main frame, a rotary blade disposed in the front portion of either side of the main frame and capable of conducting edging, an engine mounted on the main frame and a driving device for operating the rotary blade with the engine, the edger comprising: a resin cover fastened to a circular flange on the rotary-blade supporting shaft for covering a portion of the rotary blade. A structure for fitting the rotary blade cover includes a thin metal plate having an outer diameter larger than the flange, and fastening members for clamping the inner portion of the cover between the flange and the thin metal plate. Bolt assemblies are provided for fastening the thin metal plate and the cover together at a position outside the flange.

Abstract: The point is adapted to fit onto the forwardly projecting mounting wedge of a tillage shank and has a downwardly and forwardly inclined, elongated crown provided with a transverse, sharpened tip at its lower front end. An underslung transverse wall looped under the crown at the front end of the point defines a rearwardly opening socket that matingly receives the apex of the mounting wedge of the shank, and depending sidewalls on the crown adjacent its opposite lateral edges rearwardly of the underslung wall serve to present a protective trough on the underside of the crown that matingly receives the upper surface of the mounting wedge so as to protectively cover otherwise exposed side portions of the wedge and thus shield such areas from exposure of abrasive soils.

Abstract: A plurality of parallel arm type openers are mounted on a frame tube, and a rockshaft is supported directly below the tube. Adjacent each of the openers, a lever arm is fixed for rotation with the rockshaft and, upon rotation of the rockshaft in a first direction, the lever arm engages the parallel arms to lift the opener while the frame tube remains stationary in the vertical direction. A tension spring assembly connected between the parallel arms and the lever arm applies varying down force when the opener is lowered by rotating the rockshaft in the opposite direction. The amount of down pressure can be adjusted for varying conditions by rotation of the rockshaft, and adjustment can be made on-the-go from the tractor cab to compensate for changing ground conditions in a given field. Locking structure on the row units permits selective lock-up of row units with a single cycle of the hydraulic lift system.

Abstract: A compressed gas gun having a trigger mechanism including a body member having a passage through which a valve stem passes. A trigger arm is pivotably secured to the body member and includes a finger grip and a cam surface for bearing against a wall of the internal chamber of the gun to move the body member rearwardly upon actuation of the trigger arm. Rearward movement of the body member moves the valve stem rearward to overcome a spring force to release gas through the valve stem into the barrel of the gun to propel a projectile, such as a paint ball, arrow or harpoon.

Abstract: An insert for use in an agricultural tool having a cutting edge for forming a furrow. The insert includes an elongated wedge having a leading end, a trailing end, a top surface, a first side surface and a second opposing side surface coterminous therewith defining a longitudinally extending lowermost edge. The first and second side surface converge from the trailing end to the leading end and diverge from the lowermost edge to the top surface to form a v-shape leading end. In a preferred embodiment the insert includes a means for aligning the lowermost edge of the insert with the cutting edge of the tool.

Abstract: An improved device for planting seed in the soil, a sowing machine and combined machine for preparing a seedbed and for sowing using the device. According to the invention, an outside part of active part of a tool is provided which includes a carrying element whose outside edge is directed essentially crosswise to the direction of advance during working operation.

Abstract: A conservation tillage tool including a frame disposed to support a number of soil working implements in sequence. The frame is supported by ground wheels attached to the rear section of the frame. The wheels are movable with respect to the rear section of the frame to move the frame between a raised transport position and a number of lowered working positions. A hitch attached to a tractor supports the front section of the frame, and a pivotally attached tongue interconnects the front section and the hitch. A leveling mechanism interconnects the rear section, the front section and the pivotally attached tongue. The leveling mechanism is a four-bar linkage that applies a force at the pivotal connection of the tongue to the front section as the wheels move to raise or lower the rear section thereby maintaining the frame substantially level with respect to the ground.

Abstract: An edger is provided having a main frame, at least one front wheel fastened in the front portion of the main frame, two rear wheels fastened in the rear portion of the main frame, a rotary blade disposed in the front portion on either side of the main frame and capable of conducting edging, an engine mounted on the main frame and a driving device for operating the rotary blade with the engine, a supporting arm pivotally connected at its upper end to the main frame and rotatably supporting at its lower end the rear wheel positioned opposite to the rotary blade in such a manner that the position of the rear wheel can be vertically adjusted with respect to the main frame, and a positioning mechanism for physically positioning the vertical position of the rear wheel disposed between the main frame and the supporting arm, the positioning mechanism comprising a securing portion formed in either the main frame or the supporting arm, a securing arm having a plurality of securing steps which can be secured to the secu

Abstract: A compressed air gun comprises a plastic casing, in which a low-pressure cylinder is arranged beneath the gun barrel and a high-pressure cylinder is arranged behind the barrel, with a pressure release system between the cylinders. Two pistons are contained within the respective cylinders and are connected to a cocking lever each by a separate hinge rod. A series of catches and releases requires all operative steps to be completed in the correct sequence before firing to prevent overloading of the air pressure system and also to prevent accidents.

Abstract: A sand trap contouring attachment for a sand trap maintenance machine. A preferred attachment (12) includes a plow blade (30), a pair of blade supports (32) wherein the plow blade (30) is operatively attached to the supports (32) and wherein the supports (32) are pivotally attached to the sand trap maintenance machine (10) frame (18) at pivot points (38). Blade (30) lies at the front of machine (10), pivot point (38) lies at the rear of machine (10), and support arms (32) lie intermediate the blade (30) and pivot points (38). Control member (34) is operatively attached to the supports (32) via links (42) and (44). Control member (34) comprises an operator handle wherein the handle provides an operator gripping surface area right and left of a longitudinal center line of the machine (10). Spring means (36), (37), (39) are operatively connected to the machine (10) and the support arms (32) for biasing the supports (32) and blade (30) away from the ground. Control member (34) is adjustable to two positions.

Abstract: An implement can be releasably attached to a towel to be used as a rake to smooth sand and as an anchor to anchor the towel to the ground. The implement includes a spring-biased clamp that is releasably attached to the towel adjacent to one edge of that towel and a mounting ring on a base bar. A multiplicity of ground engaging teeth are mounted on the base bar as is a mounting ring. The mounting ring engaging ring releasably engages the mounting ring to attach the base bar to the towel via the spring-biased clamp. One form of the base bar includes a plurality of sections that telescopically connect together.

Abstract: A primary tillage apparatus includes a plurality of primary tillage tools and a coulter assembly for each primary tillage tool including first and second coulters positioned directly forward of the primary tillage tool, the coulters being mounted to diverge in a v-shape relative to the direction of travel such that the separation between the edges of the coulters increases in a rearward direction, and concave working surfaces of the coulters face outwardly away from one another, the weight of the implement frame and the action of the primary tillage tools causing the coulters to penetrate the soil ahead of the tillage tool and to press into any residue encountered, the cutting edges of the coulters gripping the residue and drawing the residue outwardly in opposite directions, tearing the residue in two and clearing the residue to the sides and out of the path of the primary tillage tool located rearwardly of the coulter assembly.

Abstract: A towed implement with an implement cylinder may be coupled to the hitch of a tractor which includes a hydraulic pump, a hydraulic sump, a rockshaft cylinder for raising and lowering the hitch, a hitch control valve for controlling fluid flow to the rockshaft cylinder, a control unit for controlling the hitch control valve as a function of a sensed parameter signal and an operator generated command signal. A two-position, four-way selector valve selectively connects the hitch control valve to the implement cylinder and operates to automatically raise the hitch to its top position when the selector valve connects the hitch control valve to the implement cylinder. A manually operated four position, four-way selective control valve is connected between the selector valve and the implement cylinder and a towed implement position sensor is connected to the electronic control unit of the tractor hitch control system.

Abstract: A release device for pulling the midsection of a bow string, the device having a slot for receiving the bow string, and a pair of balls that engage one another to close the slot to retain the box string until such time as the user manipulates a trigger to permit separation of the balls and release the bow string.