Abstract: A barbecue construction using a pair of dual-type truck wheels, one of the pair forming a lower base member and the other of the pair forming an upper firebox member. The lower wheel is disposed on an underlying ground surface with its wheel hub member facing upwardly, and the upper wheel is disposed, in inverted condition, on the lower wheel so that the upper level is supported by its hub member on the hub member of the lower wheel. The aligned axle bores of each wheel are closed to the passage of air therethrough by a plate arrangement that provides a central axis of rotation of the aligned wheels so that rotation of the upper wheel relative to the lower wheel moves the lug bores associated with the upper wheel into and out of alignment with the lug bores associated with the lower wheel and thereby selectively control the upward passage of air therethrough.

Abstract: The access door of a chamber housing opening is secured releasably in closed position by a latching mechanism provided on each of the four edges of the door. Each latching mechanism includes a plurality of spaced apart wedges projecting outwardly from the edge of the door for releasable registry with a plurality of spaced apart wedges on a wedge member mounted on the chamber housing for movement by an hydraulic cylinder between a door opening position in which the wedges on the door register with spaces between the wedges on the wedge member, and a door latching position in which the wedges on the wedge member are moved by the hydraulic cylinder into sliding, wedging engagement with the wedges on the door, whereby to draw the door into sealing engagement with the chamber housing adjacent the periphery of the opening in the housing. An O-ring seal disposed about the periphery of the door is arranged to engage the chamber housing upon closure of the door, to seal the chamber for evacuation or pressurization.

Abstract: Apparatus for concentrating gold-containing particulate material includes a housing containing an endless conveyor belt the upper stretch of which is inclined in the direction of its movement. An infeed hopper adjacent the upper end of the belt functions to deposit gold-containing particulate material on the upwardly moving upper stretch of the belt, and said stretch is inclined sufficiently to cause the particulate material to move downwardly over the upwardly moving upper stretch in a manner to effectuate classification of the particulate material by gravity separation into a minor fraction of valuable particles of smaller size and heavier specific gravity, including fine and microfine gold particles, and a major fraction of tailings particles of larger size and lighter specific gravity.

Abstract: An archery bowstring release includes a body mounting a bowstring retainer hook member and a hook release lever releasably engaging the hook member and movable in the release direction by the resilient pressure of a spring interposed between the body and the hook release lever. In one embodiment the hook release lever is held in hook retaining position by thumb pressure of an archer's hand. In another embodiment the hook release lever is controlled by a trigger lever movable between a cocked position in which the hook release lever is held in hook retaining position and a triggered position in which the hook release member is disengaged from the trigger lever for movement to release the hook member. In still another embodiment a whisk hammer and fulcrum lever are interposed between the trigger lever and hook release lever, and an adjustable spring tension may be applied to the whisk hammer to vary the resistive pressure applied by the whisk hammer to the trigger lever.

Abstract: A dental water jet flossing apparatus comprises an elongated, flexible tubing attached at one of its ends directly to a household water supply, preferably at a point where water temperature can be controlled, as at the water outlet pipe mounting a shower head. The opposite end of the tubing is connected to a hand-held unit that is configured to releasably mount a dental water jet nozzle. A water flow control valve is included in the hand unit and configured to engage the flexible tubing and selectively constrict the latter to various desired degrees to selectively control the amount and rate of water delivered through the tubing and hence expelled from the nozzle. A syphon cup containing mouthwash or the like may be provided in-line to meter desired fluids into the water being delivered out of the nozzle and into the user's mouth.

Abstract: An extrication and spinal restraint device for use in emergency rescues, an onsite medical aid where potential back, neck and shoulder injuries may exist includes a jacket of flexible material arranged to extend the entire length of a victim's spine, neck and head and be secured thereto by head, torso and pelvic straps, the jacket mounting a pair of rigid backboard members arranged to be disposed behind a victim's back, neck and head and configured to extend with the confronting longitudinal edges disposed along a victim's spine to provide rigid support only inwardly of the sides of a victim's body and head, the pelvic straps configured and disposed specifically to engage the pelvic structure of a human torso specifically above the articulating joints of the hips, so that movement of the legs is permitted without affecting changes in tension on the jacket, and the head is positively immobilized by a pair of straps configured specifically to engage only the fixed, non-articulating portion of a human skull or a

Abstract: A container is formed of a pair of paperboard tubular walls open at both ends and one telescoped within the other. A liquid impervious transparent liner is confined within the inner wall and the ends of the walls are closed by top and bottom closures. A fitment is attached to the liner and extends outward through the tubular walls for connection of a dispensing control valve. One or more liquid level indicating windows is provided by forming registering openings in the inner and outer tubular walls and pressing a transparent cup into each opening in the inner tubular wall before telescoping the inner and outer tubular walls together. A peripheral flange on the cup abuts the outer surface of the inner tubular wall and is secured in place by being sandwiched between the inner and outer tubular walls. In an alternative container construction, a single container wall is used, and the cup flange is abutted against and, if desired, secured to the confronting inner or outer surface of the container wall.

Abstract: A silicon controlled rectifier is connected between the output of each stator winding of a conventional alternator and a terminal of a lower voltage battery, and a control electrode of each silicon control rectifier is connected to a switching control circuit for switching the silicon control rectifiers to switch stator current alternatively to a lower voltage battery or to a higher voltage battery connected across the alternator stator. A voltage regulator is connected between the alternator field coil and the lower and higher voltage batteries.

Abstract: An abrasion-resistant liner for centrifugal solids type pumps comprises a plurality of hard metal segments attached to the inner circumferential wall of a conventional pump in spaced apart condition thereabout. The open spaces thus formed between each adjacent hard metal liner segment receive a soft abrasion-resistant material such as rubber, synthetic thermoplastic resin, or other polymer or elastomer material, bonded, vulcanized or otherwise secured to the pump housing and to the hard liner segments, thereby forming a plurality of alternating liner segments of hard and soft material, together forming an even, smooth liner surface substantially encircling the impeller of the pump. In this manner, solids and sharp objects being pumped are deflected by the spaced apart metal segments, reducing damage of the abrasion-resistant material, while the meal segments also serve to more positively secure the soft abrasion-resistant material in bonded condition on the pump housing.

Abstract: System for hanging pictures and the like, consisting of a carrier rail (1) to be secured horizontally to a wall, a wire (6) extending vertically, a hook-shaped element (3) at the top end of the wire (6) for connecting the wire (6) to the carrier rail (1) and an identical hook-shaped element (3) for connecting the wire (6) to hanging means at the back of the picture or the like, each hook-shaped element (3) being provided with a through channel (5) for allowing the wire (6) through, and having exclusively essentially the form of a rectangular parallelpiped with a slot (4) crossing perpendicularly the channel (5) for the wire (6) and adapted to cooperate with the carrier rail (1) and with the hanging means at the back of the picture or the like.

Abstract: A reciprocating conveyor comprised of a plurality of elongated, reciprocative, load-supporting slats mounted on a conveyor frame for reciprocative movement relative to the frame, is mounted detachably on an underlying support frame which carries integrally therewith a hydraulic drive mechanism arranged to releasably engage the load-supporting slats for reciprocating the latter on a predetermined sequence for moving a load in an off-loading or on-loading direction.

Abstract: Food products, such as fish fillets, chicken fillets and many others, are cut to predetermined portion sizes of equal weight and volume, or to predetermined profile shapes, by moving the food products on a conveyor, scanning them as then move through a shadow line with a camera capable of providing a programmed computer with dimensional data, and utilizing the computer to control the operation of a plurality of high pressure water jet cutters to cut the food products to reduced sizes as dictated by the computer program.

Abstract: The shelf-operating piston rod of an hydraulic cylinder of a freeze dryer is prevented from possibly contaminiating the freeze dryer chamber either by isolating the piston rod from the chamber by enclosing the piston rod within the chamber with an impervious flexible sleeve capable of extending and retracting with the piston rod. The pressure within the sleeve may be adjusted to approach or match the pressure within the freeze dryer chamber. Prevention of contamination alternatively may be achieved by interposing a sterilizing container between the external hydraulic cylinder and the freeze dryer and surrounding the piston rod, and subjecting the piston rod within the sterilizing container to sterilizing fluid before the piston rod is extended into the freeze dryer chamber.

Abstract: A back incline indicator (10) employs a mercury switch (44) and a beeper (72) to indicate to a user (24) whenever the back of the user (24) is bent beyond an acceptable limit, .lambda.crit. The mercury switch (44) and beeper (72) are attached to a casing (38) including a plate (28A) that is parallel to the back of the user (24). The casing (38) is connected by a connector (14) to the shirt collar of the user (24). The mercury switch (44) is set to an angle .theta. from the plate (28A). The value of .theta. determines how much the user's back may be bent before .lambda.crit is reached. The value of .theta. may be set to different amounts as the desired value of .lambda.crit may vary with different uses of the back incline indicator (10).

Abstract: A multiple battery source of multiple voltages is connected to the input of a switching regulator in which the currents sourced by inverting and non-inverting inputs are compared for balance, and when the imbalance is generated by external circuitry and "error" current is detected by the comparator circuit which thereupon provides an electrical output correction signal to the switching circuitry to correct the imbalance.