Abstract: A transporter-unloader for large cylindrical hay bales features a main frame and a load frame, the load frame partially overlying the main frame and pivoted to the rear end of the latter frame. The rear end of each frame is equipped with a pair of wheels, and a scissors type hoist between the two frames raises the load frame relative to the main frame and at the same time elevates the rear end of the main frame relative to the ground.

Abstract: A drum mixer for recycling old asphalt pavement features a stationary shroud enveloping a series of circumferentially spaced feed ports medially of the drum. The old pavement is introduced tangentially into the shroud and then into a series of "hoppers" within the shroud formed about the feed ports and revolving with the drum. The old pavement falls through the feed ports onto the exterior of a conical inner drum and is directed to the downstream end of the latter by flighting thereon where it joins virgin aggregate emerging from the interior of the inner drum.

Abstract: A garden hoe features a wide cutting edge for normal hoeing, at one end of which is a pair of cutting edges meeting at a right angle for bordering a garden or a walk and at the other end of which is a short cutting edge for chopping or trenching. A hooked cutting edge for pruning is also incorporated in the hoe which may have a long or short handle.

Abstract: An attachment for operating an internal combustion engine on either gaseous or liquid fuel incorporates a modified air cleaner assembly having a cover and an annular adapter between which is sandwiched a typical annular filter element, the adapter fitting over the engine air intake. A diaphragm movably mounts a circular diaphragm plate to the cover to form a chamber therewith on one side of the diaphragm plate and an annular venturi between the other side of the diaphragm plate and the adapter. In one version gaseous fuel is admitted into the chamber through an inlet fitting secured to the cover and thence through ports in the diaphragm plate into the venturi. In another version the gaseous fuel is admitted through an inlet fitting secured to the adapter and thence into the venturi through ports in the adapter, a hose connecting the inlet fitting and the chamber.

Abstract: A construction for wooden stairs that permits standardized, factory machined components to be pre-packaged and shipped to the job site where they can be installed to fit almost any installation. The structure includes stringers which have riser and tread receiving grooves on both sides. The grooves on each side of the stringer provide for a different rise and run rate. The construction technique and the resulting stairs substantially reduces the job-site layout and assembly time from that required with conventional stairs. It also reduces the number of components that must be produced and stocked. The technique is especially applicable when employed with wooden stairs of the interlocking type that generally need no fasteners, adhesives or wedges.

Abstract: A weight lifting machine substitutes a noncumulative force or constant tension type spring for some of the individual weights with which the machine would otherwise be equipped, the tension required to unwind the spring being equal to the sum of the omitted weights. The remaining individual weights function as before but when additional resistance, greater than their sum, is wanted, the spring is connected into the lifting mechanism.

Abstract: An adjustable ankle strap for holding weights used in leg lifting exercises. The device "includes" of a single continuous strap having an adjustable fastener at its ends, the strap extending in a cross pattern through a loop affixed to a cushion that rests on top of the foot. The single strap provides a double loop, one of which fits beneath the arch of the foot with the other extending around the ankle with the cushion resting on top of the foot. A fastener is provided on the strap for attaching the desired weights.

Abstract: A vehicle for handling heavy loads and moving them short distances. The vehicle has a lifting linkage arrangement that allows the center of gravity of the load to be carried over the front wheels or between the front and rear wheels after the initial lifting phase. Initial lifting is aided by an outrigger and loadrest. This design therefore eliminates the need for a heavy vehicle using counterweights and provides a vehicle that has maximum maneuverability and lifting capacity.

Abstract: A liquid dispenser having an outer tank and an inner tank or trap at the bottom thereof with an inlet from the outer tank features a proportioning device at the inner tank inlet which includes an inverted cup-like member with a floating check ball therein. The parts are arranged so that the check ball offers decreasing impedance to flow from the outer tank into the inner as the liquid level in the outer tank decreases, whereby to provide a substantially constant rate of flow into the inner tank regardless of the liquid level in the outer tank.

Abstract: An emitter for use in irrigation systems of either the pressure compensating or variable flow type which emitter has an improved means of filtering and removing impurities so as to minimize the possibility of clogging. The emitter includes a first filter located inside of the fluid line or hose so as to eliminate most of the particles from ever entering the emitter. The emitter also includes structure so that once the fluid enters the emitter it is subjected to a cyclone path while going through multiple decompression chambers. This cyclone type turbulent path deposits the impurities against the outside walls of the decompression chambers where they accumulate in a collecting chamber for easy removal.

Abstract: A fast recovery audio amplifier for use in electrophysiology and other neurological tests and techniques relating to nerve and muscle functions. The fast recovery amplifier recovers from overload in less than one millisecond, thus enabling its use in clinical electrophysiology to record time lapses from stimulus to response of less than several milliseconds. The amplifier achieves fast recovery primarily because it eliminates input and interstage coupling capacitors so that the feed-forward path from electrode to output is strictly a DC amplifier.

Abstract: A method of hot mix recycling of old asphaltic concrete paving heats the old pavement, after it has been removed and sized, to a temperature below its firing point and heats fresh aggregate to a greater temperature before combining the two and adding new asphalt. The method is embodied in a drum-mixer type of apparatus modified by inserting a smaller drum in the upstream portion of the large drum. The burner fires into the smaller drum into which the fresh aggregate only is introduced while the old mix (plus additional fresh aggregate in certain cases) is introduced into the annular space between the two drums, the fresh aggregate and the old mix being thereafter combined in the large drum, new asphalt added and the mix further heated.

Abstract: A tumbling floor features an assembly of rigid panels beneath each of which is an array of soft foamed blocks of cushioning material which rest upon the gymnasium floor. The panels are covered by foamed panels of soft springing material and the latter in turn covered by a thin carpet providing a non-slip surface.

Abstract: A camera support system, particularly for close-up and copy photography, features a light-weight larger bipod consisting essentially of a pair of foldable legs, a transverse lower end member on one leg and the lower end of the other leg providing supporting feet for the system. The legs carry various adjustable mounts for one or more cameras, or accessories, one of the mounts being essentially a smaller bipod which can be similarly employed when detached from the larger. Both the larger and smaller bipods can be used in either upright or reclining positions and are readily foldable into compact form for carriage and storage.

Abstract: A slow-run system for gaseous fueled internal combustion engines, including gaseous fuel conversions of liquid fuel engines for alternate operation on either fuel, employs a valve having an inlet receiving gaseous fuel from between the primary regulator and zero pressure governor and an outlet emptying into the air cleaner assembly upstream of the liquid fuel carburetor or equivalent means. The valve is actuated through a connection into the engine air intake manifold or similar passage below the throttle such that the valve opens to supply gaseous fuel to the air cleaner assembly during slow-run when manifold vacuum is high and remains open throughout substantially all of the engine's operating range.

Abstract: A lockable, coin-operated coat hanger for temporarily securing a coat or other similar garment on a coat rack to discourage theft of the garment. The security hanger has a closed loop that fits over the rack bar and is secured to a housing. Arms for suporting the coat extend from the housing, and a chain with a shackle at its free end are affixed to one of the supporting arms. By inserting a coin which permits a key to be turned and removed, the shackle is freed and can be inserted through the sleeve of the garment and then pushed into a locking hole that secures the garment. The hanger can be unlocked and the garment removed only by reinserting the key to release the locking shackle.