Abstract: A planting implement which includes an elongated support beam for carrying a plurality of spaced planting units thereon. The support beam also includes a plurality of rearwardly pivotable segments arranged so that a closed framework structure may be constructed by pivoting and interconnecting the rearwardly pivotal segments. The closed framework structure includes a forward side containing a portion of the planting units and a generally parallel, rearward side containing the remaining planting units. The spacing of the rearward side planting units is offset from that of the forward side units, approximately one-half of the distance of the planting units. This results in equally spaced rows of approximately one-half the distance between the planting units.

Abstract: The disclosure concerns a court for a ballgame. A vertical wall is upstanding from a horizontal player surface. An inclined wall extends forwardly of the vertical wall. At each side end of the inclined wall, two inclined generally triangularly shaped panels are provided, each turned more toward the opposite wall. Over the top of the court is an optional ceiling. At the sides of the court, are optional side walls. At the rear of the court may be an optional rear wall.

Abstract: A high power source of electrical energy, such as a homopolar generator, is connected to a longitudinally extending coaxial structure which forms a gun barrel. Within the gun barrel toward the end to which the power supply is connected is mounted a coaxial projectile, or several projectiles, in engagement with one or more movable conductive elements, that extend between the two longitudinally extending conductors. The homopolar generator is switched to apply on the order of a megajoule of energy to the coaxial structure, and after being delayed for a short interval until the current has built up to a significant level, the conductive element is accelerated with the projectile as a result of the magnetic pressure building up within the coaxial structure. Velocities on the order of 2 kilometers per second with kilogram mass projectiles may be achieved with a gun barrel approximately one meter in length.

Abstract: An installation such as in the form of a building having a room or chamber in which an upward air flow is produced to levitate human beings. This installation, herein called a levitationarium, is constructed and arranged to be simple, safe and economic to operate in particular by comprising a blowing propeller that is shrouded and arranged to produce an induced suction flow in an annular air passage around it, under the action of the direct flow by the propeller inside the shroud; by having a toroidal air passage arranged for closed circuit streamline air flow serially through it and the levitation chamber; and by including a toroidal core portion interposed between the levitation chamber and the toroidal air passage and providing a spectator gallery and access to the levitation chamber.

Abstract: An elongated upstanding shank is provided including a ground piercing lower end and an upper end including structure for applying rotary torque to the shank. The lower end portion of the shank supports a generally horizontally disposed U-shaped blade therefrom including a pair of generally parallel upper and lower arms joined at one pair of corresponding ends by an integral curved bight portion. The other pair of corresponding ends of the arms are supported from the shank at points spaced therealong. At least the lower arm and the adjacent portion of the bight portion include a sharpened edge facing outwardly of one side of an upstanding plane containing the U-shaped blade and the shank. The blade comprises a thick elongated strap metal member bent into U-shaped configuration and the portions of the blade defining the lower arm and the adjacent portion of the bight portion are disposed with their width extents disposed generally normal to the aforementioned plane.

Abstract: A practice tennis court for practicing serving the tennis balls consists of the complete forward or receiving part of a tennis court back to the net and only the service area beyond the net. Immediately behind the service area is an end net or other backstop to stop the balls without rebounding. At the net, there is a continuous rake extending across the court for sweeping used balls to the back of the service area. At the rear end of the service area adjacent to the collection net is a trough with an endless belt running from side to side to remove the spent balls to a collection point. At the end of use of the court or after play of a selected number of balls, the rake is moved from the net area to sweep the spent balls underneath the collection net and into the trough for removal. A preferred arrangement would provide several of these courts side by side with the collection trough and belt extending across all of the practice courts.

Abstract: A cartesian toy including at least one partly transparent liquid container in which there is at least one freely floating body movable by buoyancy changes. This is variable in that an air bladder located in a cavity of the floating body casing is compressible to a greater or lesser extent by the liquid pressure in the liquid container being varied by a pressurizing device. When this device causes expansion of the air bladder or the air zone located in the floating body, liquid flowing out of the floating body casing additionally imparts to the floating body or parts thereof by recoil or reaction force an in particular horizontally directed acceleration or movement. Also, particularly sized and arranged casing parts on the floating body cause this body to move in one rotary direction or the other when the casing parts contact the container or objects in the container.

Abstract: To prevent a tractor pulling a plow (P) from digging itself in, if the plow position, with respect to soil or tractor level, is controlled by an automatic control system which causes the plow to be lowered if the pulling force of the tractor decreases, slip of the drive wheels of the tractor is sensed and an overriding command signal given to the plow positioning system (S) tending to raise the plow, or, alternatively, a visual indication is given to the operator that the plough should be raised manually; the slip condition is sensed by differentiating a signal representative of plow position, with respect to time, and comparing the so differentiated plow positioning signal (or, in other words, plow dropping speed signal) with a reference which, preferably, includes such factors as tractor engine speed, tractor and/or implement weight, ground wheel adhesion, tractor gearing, and the like.

Abstract: A game apparatus for playing a lawn game of entertainment comprises a plurality of generally upright targets, a plurality of balls, and a plurality of mallets for striking the balls. In addition, a plurality of boundary stakes are used to establish the boundaries of play on a playing surface. Each target has a base and an elongated upright, with the base being positioned on the playing surface or lawn and the upright formed to be retained slidably in a generally vertical position on an upwardly extending portion of the base. Preferably, each player of the game has three balls and a mallet, which is used for striking the balls to selectively advance each ball across the playing surface and into contact with selected uprights. Each upright is retained slidably on its base to normally be maintained against tipping, but when a ball contacts the upright with sufficient force, the upright tips and slides off of the base onto the playing surface.

Abstract: A 180.degree. folding tool bar for an agricultural implement is described including a main frame having wing sections pivotally mounted on the ends of the main frame which are movable between field and transport positions. A hydraulic cylinder is positioned within the main frame at each end thereof and has one end connected to the main frame. The rod end of each of the hydraulic cylinders is connected to one end of a wheeled carriage with the other end of the wheeled carriage being pivotally connected to the inner end portion of the associated wing section. The inner end of the carriage has a horizontally disposed slot which receives the rod end of the hyraulic cylinder to enable the wing section to float relative to the main frame when in the field position.

Abstract: An implement having a tool equipped tool bar with a central horizontal section, a wing pivotally mounted to each end of the central section, a hydraulic cylinder mounted on the central section for each wing and connected with the wing to move the wing from a working position in general alignment with the central section to a folded storage, or transport position on the central section, a pair of spaced front support structures for the central section in the storage position and a support stand mounted on the wing, the support stand in the wing folded storage position extending downwardly and rearwardly of the tools to support the rear of the implement.

Abstract: A power hoe includes a power source, two substantially planar hoe blades positioned in apposition to one another and power connecting structure to synchronizingly reciprocate the blades in sliding engagement relative to each other. The sliding engagement causes the blades to be self-cleaning. Orientation of the tapered end of each hoe blade perpendicular to the direction of reciprocation effects a ground penetrating action of the hoe blades.

Abstract: An improved pocket billiard rack configured to facilitate the circular arrangement of seven billiard balls on a billiard table. The rack includes a framing member having circular opening therethrough disposed between a top end and a bottom end. The framing member is dimensioned for receiving seven billiard balls in abutting relation positioned in a circular arrangement. The rack facilitates play in a novel "Seven Ball" billiard game, which permits players to perform combination and carom shots, defensive shots and placement in a fast-paced game.

Abstract: A self-propelled disk harrow apparatus having four gangs of disc members attached thereto which are rotated to propel the disk harrow and to thereby till the soil. Wheels are provided for allowing the disk harrow to travel on public roads and to aid in propelling the disk harrow. When the disc members extend too far into the soil or otherwise become ineffective in propelling the disk harrow, for example when in wet or sandy soil, the weight of the disk harrow transfers to the wheels and the wheels tend to primarily propel the disk harrow. A hydraulicly controlled pitch control is provided for controlling how deeply the discs extend into the ground. An automatic coupling structure is also provided for allowing each gang of discs to be folded for extending the effective length thereof and still providing power to all of the discs on each gang.

Abstract: A discing tool is provided which includes a plurality of disc gangs connected to a movable elongated frame. The frame is supported on a number of rotatable wheel assemblies so that the disc gangs can be moved in a direction generally parallel to the longitudinal axis of the frame as well as in a direction generally perpendicular to the longitudinal axis of the frame. A pair of outer disc gangs are pivotally connected at their first ends to the center portion of the frame. The second ends of the outer disc gangs extend in opposite directions and the outer disc gangs can be positioned at various predetermined angles relative to the frame. A center disc gang is connected to the center portion of the frame and is vertically pivotal. When the discing tool is used to work the soil, the center disc gang disc harrows the section of soil between the first ends of the outer disc gangs.

Abstract: A soil leveling apparatus (10) is disclosed which includes a frame (11) having ground-engaging members (12a, 12b, 12c, 13) disposed transverse to the direction of motion, side rail members (14, 15) in which the ends of the ground-engaging members are secured, and upstanding connecting means (20) for operatively attaching the apparatus (10) to the draft vehicle. A scarifying means (50) for breaking up and loosening the soil prior to the leveling operation can be mounted near the forwardmost area of the apparatus (10). The scarifying means (50) includes a cross-shaft (51), connector arms (52) for pivotally connecting the cross-shaft (51) to the frame (11), scarifiers (55) extending downwardly from the cross-shaft (51) and a hydraulic cylinder (61) for lowering and raising the scarifying means (50) into and out of the soil.

Abstract: A ground penetrating tool for a farm implement shank has a pyramidal tooth provided with a pointed, leading apex and a socket in its trailing end that receives a mating, triangular tongue integral with an upwardly and rearwardly extending mount releasably secured to the shank. The trailing end of the tooth abuts shoulders on the mount to absorb the load on the tooth and further protect a fastener passing transversely through the tooth and tongue for releasably attaching the tooth to the mount.

Abstract: A transport device for an agricultural drill is disclosed. Individually mounted, hydraulically actuated transport wheels are described. The transport wheels may be lowered in order to raise the drill to allow movement in a direction perpendicular to the ordinary operating direction of the drill. A mounting system for the wheels which absorbs shocks along three axes is described. Co-action between a coupling device and a hitch device which allows the drill to be transported over uneven ground is also disclosed.

Abstract: The apparatus includes an endless nylon rope trained over two distally mounted sheaves which define paths spanning either side of the distally mounted sheaves and means for the continuous application of herbicide to the endless rope. The means for applying herbicide to the rope includes an immersion basin in which portions of the rope are continually pulled through a shallow level of herbicide. This is accomplished by training the endless rope onto a drive drum having at least one revolution of rope wherein the bottom of the drum is at a level below the level of the herbicide and an idler drum driven by the driven rope which again has at least one revolution or loop of wetted rope around it and which is submerged in the herbicide within the immersion basin.

Abstract: A treadmill exercising apparatus comprising a generally planar frame equipped with a planar slider bed and head and tail rollers journalled respectively at the head and tail ends of the frame, over which an endless nylon belt is trained, with the slider bed having a top, slider, surfacing, formed by plastic sheeting, across which the upper run of the belt rides, and the head and tail rollers being formed from a rigid metallic material and provided with a belt centering crown, which in the case of the head roller is formed by an elastomeric material. The frame at its head end is equipped with a cross member in which are threadedly mounted in spaced apart relation a pair of threaded screw members that support the head end of the frame for adjustment of the slope of the treadmill.