Abstract: A conveyor unit for a high wall mining system; a mining system employing a train of such units. The conveyor units are pushed in tandem into the mine. The system contemplates a motor mounted on a cutter at the head of the train; through a series of shafts and clutches, serially through the train of conveyor units, rotation power is transferred mechanically from the motor to turn the conveyor belts of the individual units. The invention includes a preferred coupling/clutch apparatus and a launch vehicle for adding conveyor units to the train which has the ability to start the rotation of the conveyor belt on the new unit as it is added.

Abstract: Apparatus for climbing trees and poles includes two stirrups having downward oriented hooks on the sides thereof, ankle straps thereon, and a plurality of spanning straps for tightening around a tree r pole. The apparatus permits ready ascent through tree branches oriented in all directions, and is easily portable. Hunters, for example, may wear the stirrups while walking through the woods.

Abstract: An airfoil for a sports vehicle is mounted near the rear of the hood. It has several joined panels of various angles designed to direct the flow of air upwardly, and partially to the side, in front of the windshield. Details are shown for clips to fasten the airfoil to the hood.

Abstract: A hexagonal refractory brick is constructed with tapered sides so it can be stacked 3-on-1 and 1-on-3, the bottom surface of the brick fitting between projections on the top surfaces of three others. A central vertical channel in the brick is complemented by other vertical channels formed by the assembly of a plurality of bricks, and horizontal channels which are relatively wide at the bottom.

Abstract: A rotatable throat for a coal pulverizer is improved by creating a high pressure drop in the air ports which surround the throat. The lower portions of the air port nozzles are made of vanes and relatively thin sides, and shaped to provide air entrance areas from five to six times the release points of the nozzles.

Abstract: A method for collecting airborne particles and microorganisms by injecting them into a swirling air flow from where they are removed onto a dry surface, a surface coated with an adhesive material or a surface wetted by a liquid that is swirled onto that surface from a liquid reservoir below. The swirling air motion and the aerosol injection into it are achieved by pushing or drawing the airborne particles and microorganisms through one or more nozzles that are directed at an angle towards the collection surface.

Abstract: An apparatus for collecting airborne particles and microorganisms by injecting them into a swirling air flow from where they are removed onto a dry surface, a surface coated with an adhesive material or a surface wetted by a liquid that is swirled onto that surface from a liquid reservoir below. The swirling air motion and the aerosol injection into it are achieved by pushing or drawing the airborne particles and microorganisms through one or more nozzles that are directed at an angle towards the collection surface. Each entire nozzle or only its exit section are aligned along the axis of aerosol flow injection into the swirling air flow. The apparatus consists of one piece or of three main components that are assembled to form one unit and are comprised of one inlet section, one nozzle section, and one collection vessel.

Abstract: A suction tube for use with a laryngoscope comprises a suction tube configured in the general profile of a laryngoscope, having an elongated clip which may be snapped on to the handle of a laryngoscope and easily removed after use. The device enables the user to work with the laryngoscope, the suction tube, and an airway tube all at the same time to accomplish oral intubation efficiently and without distractions.

Abstract: An air or gas sampling device utilizes a small tube calibrated under isothermal conditions. The relationship of pressure at the input end of the tube to flow is plotted and stored in a microprocessor for comparison with pressure monitored during sample pumping. Pulsations in flow caused by the air or gas pump can be neutralized by a damper comprising a small chamber having a diaphragm for one wall.

Abstract: Apparatus for drying flowing gas includes a generally cylindrical vessel having a gas inlet and a gas outlet, two perforated plates of different metals in contact with each other transverse the interior of the vessel, and a third perforated plate downstream from the two mutually contacting plates.

Abstract: Fully hindered secondary amines, typically tetramethyl piperidine, are reacted with terminally unsaturated electrophilic compounds having at least five carbon atoms to obtain tertiary hindered amines. The reaction is conducted with an excess of secondary amine, preferably in the presence of a specified solvent such as N-methyl pyrrolidinone.

Abstract: Corrosion is inhibited in hydrochloric acid solutions used to acidize wells, by adding to the solutions a corrosion inhibiting composition comprising cinnamaldehyde or a substituted cinnamaldehyde together with a reaction product of a C.sub.3-6 ketone such as acetophenone, thiourea or a related compound, formaldehyde and hydrochloric acid.

Abstract: A conveyor unit for a high wall mining system; a mining system employing a train of such units. The conveyor units are pushed in tandem into the mine. The system contemplates a motor mounted on a cutter at the head of the train; through a series of shafts and clutches, serially through the train of conveyor units, rotation power is transferred mechanically from the motor to turn the conveyor belts of the individual units. The invention includes a preferred coupling/clutch apparatus and a launch vehicle for adding conveyor units to the train which has the ability to start the rotation of the conveyor belt on the new unit as it is added.

Abstract: Hydrocarbon fracturing fluids are made by combining organic phosphate esters with polyvalent metal salts in hydrocarbon carriers to form gels; breaking of the gel is retarded or otherwise controlled over a wide range of water concentrations through the use of slowly soluble alkaline earth metal compounds, preferably hard burned magnesium oxide, which may be added along with the gel component.

Abstract: A stadium simulating bowl comprises a base shell, a transparent cover shell and an illustrated flat cut in a shape so that it will substantially entirely cover the base shell. The base shell, with the illustrated flat appropriately creased on top of it nests into the cover shell, which is welded peripherally around the base of the two shells. The flat includes a rectangular central area and four arms, each having two trapezoidal and one generally rectangular areas.

Abstract: A fishing lure comprises a pair of arms configured to simulate the belligerent position of the raised upper arms and suspended lower arms of a crustacean together with a device for attaching the upper arms to a jig head or other device proximate to a hook.

Abstract: Two golf tees are tethered together by a cord, preferably a monofilament which passes through the stems of the tees. Pegs mounted on a home station are inserted into the tees for storage and carrying the tees through the game. In use, both tees are inserted into the ground, and the tether prevents loss of the tees. The tees are made of high density polyethylene or other similar tough material, as the assembly is designed to prevent loss and breakage of tees.

Abstract: Continuous electrolytic tin plating is accomplished in a bath containing 90-160 g/L sulfuric acid, 40-70 g/L tin ion and a grain refiner, at a speed of 900-1600 feet per minute and a current density as much as 1500 amperes per square foot or more.

Abstract: Hydrocarbon fracturing fluids are made by combining organic phosphate esters with polyvalent metal salts in hydrocarbon carriers to form gels; breaking of the gel is retarded or otherwise controlled over a wide range of water concentrations, through the use of slowly soluble alkaline earth metal compounds, preferably hard burned magnesium oxide, which may be added along with the gel component. The slowly soluble alkaline earth metal compound is employed together with an oily acid breaker retarding agent such as tall oil.

Abstract: An enameling steel having excellent strength after fire includes up to 0.008% C, 0.25-0.35% Mn, 0.03-0.05 Al, 0.010 to 0.014 N and 0.020-0.025 Nb.