Abstract: A movable filter system is provided for moving one or more filters of a filter assembly between an operative position and a maintenance position. In one embodiment, a filter assembly is secured to a telescoping rod assembly so that it may be moved between operative and maintenance positions. Positioning the rod assembly vertically allows gravity to move the rod assembly to an extended position, and a winch and cable may be used to move the rod assembly to a retracted position. Keyways and channels may be used within the rods of the telescoping rod assembly so as to maintain rotational positioning of the filter assembly.

Abstract: A device for achieving the separation or extension of the scale of products in a conveyance in superposed copies in which means are provided that are capable of increasing the speed of the belts (12, 17) conveying the separated or extended scale relative to the speed of the upstream belt (11) of the device for the conveyance of the scale before the separation or extension.

Abstract: A process for continuously separating relatively coarse particles from a suspension of a mixture of particles in a liquid wherein the suspension is caused to pass through a screening medium which is rotating in its own plane so that the coarse particles are retained on the surface of the screening medium; characterized in that atmospheric pressure above the screening medium is caused to be in excess of the pressure below that medium.

Abstract: Heavy metals such as mercury, gold, platinum, rhodium, osmium, silver, lead, palladium, etc., in the free state, are separated from their ore by applying water and the ore to a plurality of two to six rotating, inclined, spiral grooved wheels driven from a common shaft. The grooves are closely spaced and may have a declining pitch from the wheel at its periphery to its central annulus. The free metal tends to sink to the bottom of the grooves and the lighter ore is washed away as the metal moves along the spiral grooves to the annulus. The free metal and any remaining ore is fed from the annulus to the succeeding wheel and the process is repeated.Mercury may be added to any of the wheels to facilitate separation of the metal from the ore. A separating wheel having a unique groove design is also disclosed.

Abstract: A cementation apparatus is provided wherein the reaction surface thereof can be increased without changing the outer dimensions. There is provided at least one inner cylinder which is freely mounted in an outer cylinder and placed one within the other. The inner cylinders are perforated along their outer surfaces and are preferably open at both ends as is the outer cylinder. In the cylinder assembly, all the cylinders as well as the cylinder assembly are rotated. A slurry containing material to be treated as well as the amalgam is fed into the cylinders and on rotating the cylinders, the slurry is picked up by the surface of each of the cylinders so as to provide a reaction area for cementation which is equal to the sum of the surface area of all the internal cylinders and inner surface area of the outer cylinder.