Abstract: A method of separating particulate material of differing size or density including the steps of: tumbling the particulate material to produce continuous or discrete avalanches (19) in the surface of the particulate material to move particles of smaller size (14) or higher density (22) towards the centre of the particulate material and particles of larger size (16) or lower density (24) radially outward from the centre of the particulate material; and extracting particles at selected radial locations (8, 10). A device for separating particulate material of differing size or density is also provided.

Abstract: A system for separating construction debris into low density debris and high density debris. The construction debris is delivered into a rotating drum having front and rear discharge openings. The lower portion of the drum is filled with water, and the debris is deposited onto the water, with the low density debris floating at the surface and the high density debris descending to the bottom of the drum. A plurality of high velocity water jets are positioned forwardly of the debris receiving location to create a turbulent high velocity water flow at an upper zone of the water in the drum to move the wood and other low density material toward a rear converging passageway that leads into the rear discharge opening. The higher density material is carried by a scroll type conveyor forwardly in the drum to a forward discharge location where rotating paddles lift the high density debris upwardly and thence move it into the front discharge opening.

Abstract: An apparatus for obtaining enriched fractions from storage batteries is preferably three units connected in series, each of which has two concentrically disposed drums provided with helical strips on their inner wall. Concentrically to the axis of the outer drum is mounted an inner perforated drum to which are fastened perforated blades and are formed longitudinal openings over which are fixed reflectors and a screen. In its rear end, the inner perforated drum ends in a conic perforated passage to which is fastened a tube with a helical strip and outlet opening.

Abstract: A method of effecting practical, simple and economical production of ore-concentrating pads of numerous configurations and sizes. Nails are employed to secure extruded strips to a backing sheet and an underlying support, following which the strips are pivoted about the nails and progressively secured to the backing sheet. The nails are then removed and the resulting pad is vacuum-applied to a concave bowl and adhesively secured therein. The shapes and positions of the strips are such that there is very close sealing engagement beween adjacent strips, after the pad is made into bowl shape, yet there is great elasticity permitting practical vacuum application to the bowl. In one embodiment, the strip-formed pad is used as a mold over which plaster of paris is molded, and the plaster of paris is used as a guide for a tracing machine adapted to make a mold for the mass-manufacture of large numbers of concentrating pads.

Abstract: A method of effecting practical, simple and economical production of ore-concentrating pads of numerous configurations and sizes. Nails are employed to secure extruded strips to a backing sheet and an underlying support, following which the strips are pivoted about the nails and progressively secured to the backing sheet. The nails are then removed and the resulting pad is vacuum-applied to a concave bowl and adhesively secured therein. The shapes and positions of the strips are such that there is very close sealing engagement between adjacent strips, after the pad is made into bowl shape, yet there is great elasticity permitting practical vacuum application to the bowl. In one embodiment, the strip-formed pad is used as a mold over which plaster of paris is molded, and the plaster of paris is used as a guide for a tracing machine adapted to make a mold for the mass-manufacture of large numbers of concentrating pads.

Abstract: Apparatus for reclaiming aggregate from unset concrete comprising an inclined rotating drum, a reservoir space in the drum, and means for separating the slurry in the reservoir from aggregate in the reservoir, the slurry exiting from the lower end of the drum and the aggregate exiting from the upper part of the drum.

Abstract: A centrifugal screening apparatus for scalping or sizing bulk materials in which an auger assembly conveys the bulk materials from an intake chamber into a cylindrical screening sleeve mounted within an enclosed screening chamber and subjects the bulk materials to centrifugal force for impingment against the screening sleeve, with the fines passing through the screen for gravity discharge from the screening chamber and the tailings being conveyed to a separate tailings chamber for separate gravity discharge therefrom. The auger assembly within the screening sleeve is equipped with a cylindrical shell integral with the auger assembly and extending the effective length of the screening sleeve that defines along the length of same uniformly spaced apertures thereabout that are separated by imperforate walling.

Abstract: A rotary drum-type sand classifier of this invention is provided with a desired number of rows of sand discharging mechanisms at the rear end thereof.Between each pair of sand discharging mechanism, a water cleaning chamber is formed where the classified sand is cleaned with water fed from the rear outlet of the drum. Due to the above construction, the sand classifier of this invention can conduct the classifying and cleaning of sand to be produced simultaneously and efficiently.

Abstract: A rotary drum air separation system separates mixed solid materials into a light fraction and a heavy fraction with substantially no stagnation of material in the air drum. It further provides for processing high volume urban solid waste without first size reducing the waste. The system separates such waste into a light fraction, substantially free of glass and ready for composting or for use as a source of energy in the form of heat or combustible gas from pyrolysis, a heavy fraction, and a glass-rich fraction from the heavy fraction, all in a high volume operation.

Abstract: Shredded scrap is conveyed from a heat generating automobile shredder to one end of a horizontal tumbling drum and is caused to move in one direction through the drum as it tumbles. An air stream which has aspirated heat generated by the shredder, and carrying particulate material removed from the scrap in the shredder, is directed by ductwork to the opposite end of the tumbling drum where the air and particulate matter move in counterflow through the tumbling scrap to remove additional particulate material therefrom as the shredded particles are being showered through the air stream. The particulate material in the air stream emerging from the tumbling drum is separated out by a cyclonic separator. A bypass air stream duct with an adjustable valve bypasses some of the air stream around the tumbling drum to control the velocity of the air stream through the tumbling drum and thus to control the size of the particulate material removed from the scrap by the counterflow air stream.