Abstract: A bow string release with a head carrying a pivotable sear movable between a closed string retaining position and an open string releasing position, and a latch for selectively engaging and locking the sear in the string retaining position. The sear includes a roller mounted on one end and the latch includes a tapered pin for engaging the roller when the pin is extended to lock the sear in the closed position. The sear includes a pair of spaced string retaining notches, adapted for engaging the bow string above and below the nock of an arrow, the bow string substantially perpendicular to the axis of the arrow when the string is placed in the release mechanism.

Abstract: The present invention is directed to an adjustable attachment for mounting a tool to a tow bar. A shank having first and second spaced parts has a bracket for attaching the first shank part to a tow bar in an operative position thereon so that the shank may follow the movement of a drawing vehicle. A structure is provided for attaching a tool to the second shank part. The second shank part, with a tool attached thereto, is spaced below the first shank part with the tool in its operative position. A pivotal joint joins the first and second shank parts. At least one threaded bolt having a threaded shaft with two ends and a head at one end and a free end at the other end threadably engages a threaded receptacle. The threaded receptacle is positioned such that the free end of the shaft prevents the pivoting of the second shank part in at least one of a clockwise or counter-clockwise direction.

Abstract: A weapon system which utilizes pressurized gas to propel a projectile from a barrel and which utilizes a shearable diaphragm member to permit the pressure of gas in the weapon to increase to a selected point before the gas propels the projectile from the barrel.

Abstract: A agricultural implement incorporates a frame which is adapted to engage a three point hitch of a tractor. The frame employs a longitudinally extending member which is pivotally connected to a link member. A resilient yielding assembly is disposed between the longitudinally extending member and the link member to absorb forces exerted from the link member onto the longitudinally extended member. Accordingly, when the link is acted upon by forces which cause the link to exert a stress on the three point hitch of a tractor, the resilient yielding assembly allows the first link to pivot about the longitudinal member thereby reducing compressive loads exerted on the upper link of the tractor's three point hitch.

Abstract: An attachment for use with an agricultural implement to protect a row of emergent plants growing in a field. The device includes a shield which protects the plants from accumulations of soil, trash, and other debris. The shield is mounted between one or more claws of the implement, on one hand, and the row of plants to be protected on the other hand. Means, such as a motor, are provided to drive the shield in a plane generally parallel to the row of plants. As the shield is positively rotated, a periphery of the shield passes closely proximate the surface of the ground in which the row of plants is located. Such driving of the shield is in a direction in which the shield would rotate if it were allowed to freewheel and were made to rotate as a result of its engagement with the ground.

Abstract: A archery bow sight for use with a bow having a body and bow string. The archery sight includes a mounting member for mounting the sight at an intermediate location on the bow, generally in the grip area. A sight frame defines an opening or aperture through which extends at least one fixed cross hair which is generally aligned with the bow string. One or more sub-frames are slidable relative to the fixed frame, each having a generally horizontally extending cross hair. The sub-frames are relatively adjustable so that the individual frames and associated cross hairs may be adjusted for various shooting distances. A level may be associated with the sight to reduce the possibility of cant or tipping.

Abstract: A subsoil plowing implement having winged subsoil plows that break and lift the soil thereby loosening said soil. The plows are mounted so that an upper surface of the wing of the plow may be oriented at varying degrees of incline to horizontal. Spikes are located at a leading edge of the wing and a shank so that said spikes precede the wing and shank through the soil. The spikes initially break the ground and reduce the resistance that the wing and shank experience as they progress through the soil. A bevelled and sharpened deflection strip fixed to a leading edge of the shank making said shank more knifelike and allowing it to cut through the soil with reduced friction. By varying the arrangement and orientation of the plows, areas of loosened soil with different cross-sectional shapes are created.

Abstract: A multi-section, foldable land plane is foldable between a relatively narrow, transportable position, and a wider, deployed position for leveling field irregularities. A central, wheeled frame is adapted to be drawn by a conventional tractor. The frame, constructed of a network of tubular steel members, supports a pair of lateral wings which can be selectively folded and unfolded over the central frame. Folding of the wings is controlled by a system of hydraulic cylinders. The hydraulic cylinders are coupled to pivotal cam arms that control upward and outward rotation of the wings relative to the frame. A deflection compensation system insures proper wing movement during movements. An automatically actuated locking system prevents undesired deflection of the wings during operation. The locking system is activated by a second pair of hydraulic cylinders that control a master locking position that is linked to remote, slave locking positions by an elongated synchronizer.

Abstract: A device (10) for working soil is disclosed in the preferred form including a grading portion (12) and a raking portion (32) of generally C-shapes. Specifically, the grading and raking portions (12, 32) are formed from planar, central sections (14, 34) and first and second, planar wing sections (16, 18, 36, 38) extending from the opposite ends thereof. The grading portion (12) includes a plurality of spaced, parallel blades (24) secured to the bottom surface of the body portion formed from a tubular beam (20) and a grading plate (22) and arranged at a nonparallel angle to the movement direction to serrate the soil. The blades (24) have elongated lengths greater than the thickness of the body portion and are spaced generally equal to their widths. The raking portion (32) includes a plurality of spaced, parallel, straight teeth (44) securred to a plate (40) and tilted at a forward angle to the movement direction.

Abstract: An apparatus for aerating turf including a mounting frame (11) for mounting the apparatus to the hydraulic lift system (12) of a utility tractor. A trailer support frame (13) is pivotably mounted to the mounting frame (11) so as to enable the trailer support frame (13) to tilt toward and away from engagement with the turf. A plurality of rotary hoes (39) are supported within the trailer support frame (13) along a drive shaft (41). Each rotary hoe (39) has a double row tapered roller bearing assembly (53) mounted on the drive shaft (41) at an angle tilted from the longitudinal axis (70) of the drive shaft, causing the rotary hoe to wobble from side-to-side (B, B') in response to the rotation of the drive shaft.

Abstract: An agricultural apparatus having a combination of ground engaging tools thereon. The agricultural apparatus includes a plurality of ground engaging cultivator tools mounted on a frame assembly which is specifically configured to promote accurate lateral spacing of the cultivator tools thereon. The agricultural apparatus further includes a pair of disc gang assemblies arranged on opposite lateral sides of the longitudinal centerline of the implement and a lift mechanism for conjointly elevating and positioning the disc gang assemblies relative to the frame assembly. The frame assembly is comprised of a series of interconnected frame members including laterally extending tool bars. Each cultivator tool is adjustably secured to a respective tool bar by a resiliently biased bracket assembly. To facilitate lateral adjustment of the cultivating tools, the tool bars are fixedly connected in spaced relation to other frame members.

Abstract: An overdraw assembly for use with an archery bow of the type including a bow having a central bow section and limb sections and a bow string secured at its opposite ends to the free ends of the limb sections.

Abstract: An archery apparatus for optimizing the force exerted on the arrow upon release includes a frame or riser and a pair of resilient limbs extending in opposite directions therefrom. A bowstring is connected between the free ends of the limbs and includes a nocking point for engagement with the nock of an arrow. an arrow rest is carried by the frame and together with the nocking point on the bowstring define a shooting axis along with the arrow travels when departing the bow. A hand grip is mounted on each side of the frame adjacent the shooting axis for accommodating the left and right hands of an archer. A harness adapted to be worn by the archer includes a bowstring release mechanism for selectively holding and releasing the bowstring adjacent the nocking point.

Abstract: An edger having a driving device for operating a rotary blade, the driving device including a driving pulley; a pulley to be driven; a driving belt arranged between the two pulleys; a swing arm having the center of its swinging motion at a position different from the center of rotation of the driving pulley; a rod slidably supported by the swing arm and supporting the pulley to be driven; a spring for urging the rod in a direction in which the distance between the shafts of the two pulleys is elongated; a drive-side pulley cover and a driven-side pulley cover.

Abstract: A toy saucer launching and catching device comprised of a base covered with an upper cover and supported on a handle to hold a saucer seat, a curved spring rod retained between said base and said saucer seat, a push plate controlled by a trigger on said handle to squeeze said spring rods inwards, and a lifting plate controlled by an auxiliary trigger on said handle to lift said upper cover, and wherein pulling said trigger causes a toy saucer to be launched out of said saucer seat into the air; pulling said auxiliary trigger causes said upper cover to be opened for catching a flying toy saucer.

Abstract: A collapsible bar assembly which is particularly useful in couplings between a tractor and an agricultural implement, the collapsible bar assembly having first and second bars which are normally co-linear but which rotate relative to one another when a predetermined compressive force is applied thereto such as by the agricultural implement striking an obstruction. The bar assembly can be incorporated into the draw bar or into various parts of the equipment such as a plough or the like which has ground working tines.

Abstract: A drag bar having a tiller directing control arm is provided for use with front tine gardening tillers. The control arm presents a user with means upon which to apply directionally controlling forces to a front tine tiller as well as to apply drag forces to control the rate of travel of the tiller.

Abstract: The invention concerns a device (1), which is self-powered or can be connected-up to a vehicle, for loosening the sub-soil, the device having an array of piercing tools (13) mounted substantially perpendicular to the direction of travel of the device. Before driving into the soil, the tools are oriented by means of a jointed-rod parallelogram, independently of the penetration depth selected (the penetration depth is adjustable). The position of the link rod (21) running approximately parallel to the chassis-mounted linkage between the two chassis-mounted bearings (7,8) can be altered by pivoting the piercing tool (13) or its mounting (14), against the bias of a spring (22), in a direction away from a stop (23) while the tool is executing the loosening movement in the soil.

Abstract: A hitch is provided for standard tractor drawbars having one or more hitch pin holes. The hitch is connected to the bar by an adaptor mounting bracket and has a pivot pin which permits the hitch to be rotated over the rear hole in proper registry to receive an implement tongue between the drawbar and the hitch. The adaptor mounting bracket provides for mounting the bracket adjustability to fit different sizes of drawbars. The hitch may be disengaged by lifting a hitch lock from locked engagement in relation to the drawbar and simply rotating the hitch to a forward position over the drawbar to clear the rear drawbar hole for conventional use. The lock is pivotally mounted on a horizontal axis on the hitch and may be lifted upwardly to permit movement of the hitch.

Abstract: A gas spring airgun in which the power system comprises a main cylinder which contains a piston and a hollow dummy piston. The piston is a sliding fit within the main cylinder while the dummy piston is fixed relative to the main cylinder, and is of considerably small diameter. A collar is located in the space between the dummy piston and the piston and is substantially fixed relative to the piston and slidable relative to the dummy piston, when the system is pressurized.