Abstract: A grader attachment is a forward extending triangular truss structure, which extends from a point of pivotal attachment to a tractor to a tandem front wheel support. A blade frame pivotally hangs from the peak of the truss, supporting a cutter blade immediately beneath the truss. The blade frame is capable of both lateral rotation an tilt. Blade positioning provides lateral forces for sliding the blade from side to side, and a rotational force for turning the blade so as to provide for a left or right leading edge cut. The blade describes, as it is moved, a cutting line tangent to a circle of large radius. The blade is supported through a long lever arm, increasing the stability of the blade position. The tractor raises and lowers the blade by tilting the entire truss. The apparatus is steered by the steering wheels of the tractor.

Abstract: A cocking device for a compressed air weapon employing pre-compressed air, wherein a cocking member acts on a compression piston via an articulated linkage, wherewith the articulated linkage is in the form of a six-point articulated linkage configured such that the cocking member is swingably mounted to the firing system via the first articulation point, and has a link member swingably connected to it at a second articulation point borne on said cocking member, wherewith the other end of the link member engages one end of a rod (which is a piston rod or piston plunger) which rod bears a fourth articulation point via which it engages a toggle arm the other end of which toggle arm is connected to the said firing system via a fifth articulation point, and wherewith the sixth articulation point is provided either on the other end of the piston-rod or piston-plunger rod or on the bottom of the cylinder of the pressure-producing piston-and-cylinder device.

Abstract: A method and apparatus are disclosed for controlling the cross slope angle cut by the blade of an articulated frame motorgrader operated in the crabbed steering mode wherein the articulation angle of the motorgrader frame is sensed and used to calculate the blade angle relative to horizontal required to maintain a desired cross slope angle. The blade angle is sensed and controlled such that the sensed blade angle is maintained substantially equal to the calculated blade angle.

Abstract: An agricultural pulling machine such as a tractor or construction machine vehicle with an attachment comprises a mounting device for coupling the attachment to the agricultural machine and a device for active damping of pitch vibrations of the vehicle. The device for active damping including a power lift for moving the mounting device and a regulating device which controls movement of the mounting device in the region of its lifting position in dependence upon the vibrations of the vehicle during travel, and a force sensor producing signals to which the regulating device responds. The mounting device includes a lever, a housing of the vehicle and a side guiding member connecting the lever with the housing of the vehicle.

Abstract: A three layered disposable vaginal device comprised of two resilient compressible polymeric foam layers separated by a non-permeable layer, the outermost layer being designed to include a receptacle. The device is also designed to include a removal tape that will permit the user to easily remove the same after use. The construction is intended for use as a barrier contraceptive with or without spermicide, as a delivery system for medicaments and also as a barrier to the transmission of sexually transmitted diseases.

Abstract: A folding mechanism for the wing section of an agricultural implement frame includes a main hinge interconnecting the wing section to the center section for pivotal motion about a horizontal axis. A hydraulic cylinder is pivotally connected at the butt end to the center frame section and at the rod end to a pivot juncture between a locator link and a push link. When the hydraulic cylinder is extended, the push link forces the wing section to rotate to the folded position; and the locator link guides the movement of the pivot juncture into an over-center, locked position so that the wing section will remain in the transport position even if hydraulic pressure is lost.

Abstract: An earth mover blade stabilizing system for maintaining the blade height constant independent of a change in the earth mover's pitch angle. A damped pendulum having a magnetic end moving between two LOHET sensors generates a signal which is used to control the earth mover's hydraulic blade actuation system. An electronic biasing means is provided by which the blade height can be incrementally repositioned to facilitate an automatic grading of a surface to a predetermined slope angle.

Abstract: Plant extracting apparatus is provided by the present invention which utilizes spaced pairs of endless belts having adjacent runs which extend from an inlet adjacent the ground towards an elevated outlet above a cutter assembly. The adjacent runs of the belts are biassed towards one another and engage plants therebetween and pull them from the ground as they are conveyed along the adjacent runs and as the apparatus travels along. Transfer means are provided for transferring the plants to the cutter assembly.

Abstract: A soil tiller or cultivator adapted to till the surface soil covered with a lawn by plural cutters to cure the compaction of the soil below the lawn surface. The till is provided with a motion transmission unit for transmitting the motive power of a driving prime mover to the cutters in the form of at least two vibrations dephased with respect to one another.

Abstract: Lift structure particularly useful with front mounted implements for providing both lift and weight transfer functions from a single valve. The valve acts as an adjustable bleeder for the lift cylinder and includes a control knob which is movable both axially and rotationally to respectively provide lift and adjustable flotation. The valve is normally biased to an adjustable orifice position for operating the implement in a lowered, flotation position. To momentarily lift the implement, the operator moves the control knob against the bias to direct flow to the lift cylinder thereby raising the implement off the ground. When the operator releases the valve, it automatically returns to the preset orifice position to provide the desired flotation.

Abstract: Lateral sway of vertically movable hitch arms is prevented by an anti-sway link which has one end pivotally mounting one of a pair of lift arms and its opposite rigidly attached to the other of the pair of lift arms.

Abstract: A cable-retaining fixture for a compound bow includes a body member with a pair of legs straddling a cable guard rod. A cable-retaining element extends from the body member opposite the legs, and a roller with a concave contact surface is mounted on an axle between the legs so that the concave surface rests against the rod.

Abstract: A centerline sight device is mounted on a tractor to enable the driver to automatically steer the tractor along a center row or longitudinal mark to align the tractor with respect to furrows of crops in a field. The sight device includes a slight arm housing mounted on the forward end of the tractor, with a sight arm operably mounted on the housing to move transversely with respect to the longitudinal axis of the tractor. A motor is mounted on the sight arm housing to move the sight arm in response to selective activation by the tractor driver. A lamp assembly housing is mounted on the tractor forwardly of the seat and rearwardly of the sight arm, and has a plurality of lamps spaced transversely across the top perpendicular to the longitudinal axis of the tractor. The lamps are electrically connected to the motor and sight arm so as to light a particular lamp in response to the position of the sight arm.

Abstract: In combination with a bow having a riser with a generally flat sided cut-away part having an internally threaded passage extending through it, an arrow rest spacer has a shaft with a channel extending axially from the outer end of the shaft, the channel being open at the outer end of the shaft and along at least one axial side of the shaft. A wall of the channel is thicker at an inner part of the channel than it is at the outer end of the channel, to form a shallower channel area in the inner part. The shaft is proportioned to fit closely but slideably in the threaded passage. The shaft is made of a material that is rigid enough to support the arrow rest in use, but elastic enough to permit a threaded plug to form threads in it as it is screwed in, and to expand as the plug moves into the shallower part of the channel.

Abstract: A pocket having an opening at the top for the flower pot consists of an inner layer of flexible waterproof material, and an outer layer of a flexible material, the outer layer in the area of the pocket being in the form of the trunk of an animal, the outer layer extending in the form of a body extremity from the pocket area, and being filled with a cushioning material so that it is a semi rigid cushioned protuberance. A removable item of apparel may be attached to the protuberance.

Abstract: A weight-balancing system for a farm implement, such as a disk harrow with foldable wings operated by wingfold cylinders, includes a selective control valve for controlling fluid communication to the head and rod ends of the wingfold cylinders. A pair of pressure-reducing/relieving valves permit individual adjustment of the pressures in both the head and rod ends to achieve the desired balance. In a preferred embodiment, a pilot-operated, two-position valve is connected between the rod ends and one of the pressure-responsive valves. The two-position valve is operated by pressure signals generated by a flow-responsive switching valve connected between the two-position valve and the selective control valve. The switching valve and the two-position valve cooperate to block the pressure-controlled outlet of the one pressure-responsive valve and the rod ends and to bypass return fluid flow from the rod ends to sump when the cylinders are being extended.

Abstract: A toy hoop and guidestick inexpensive to fabricate giving increased control of the hoop is provided by an improved stick with a specially shaped yoke that permits changing movement of the hoop to the left or to the right by wrist motion only.

Abstract: A rod weeder attachment including a clamp arrangement for mounting upon a tool bar of an agricultural implement, an arm which extends rearwardly from the clamp and is spring biased downwardly toward the ground, a ground wheel mounted upon the rear end of the arm which is a peripheral surface for running upon the ground and for defining the height of the arm above the ground, a pair of shanks which extend downwardly from the arm, a rod support on a lower end of the shanks in bearings which allow rotation of the rod about its axis and a drive arrangement which communicates drive from the ground wheel to the rod to rotate the rod as it moves through the ground. The arm is formed in two parts a rear part of which carries the ground wheel and is freely pivotal. The free pivot action of the rear part allows the ground wheel to move forwardly when inoperative so that its periphery is below the level of the rod.

Abstract: Apparatus is presented for cultivating aquaculture and mariculture crops predominantly in the warm storage zone (SZ) of a durable, salt gradient, solar pond. This SZ would be maintained near the optimum salinity and temperature for the particular crop and especially guarded against overheating. The nonconvective zone (NCZ) of this pond would insulate the SZ and buffer diurnal temperature oscillations in this SZ. Variations of the basic invention include using a partition to separate the SZ and NCZ, not using a pond liner, and adding heat from an external source to the SZ, such as geothermal or power plant waste heat. Because temperature elevations will usually be only 10.degree. to 25.degree. C., it will commonly be possible to insure stable stratification with modest salinity changes and to supply sufficient heat from directly absorbed solar energy alone. These solar ponds could economically provide optimum growing conditions fall through spring in temperate latitudes.

Abstract: A soil-working tine has a recess extending along its wearing edge. The recess captures some soil as the tine passes through the soil. The soil captured in the recess acts as a wearing edge, reducing wear on the material of the tine.