Abstract: A vibratory feeder with a transport chute mounted on a supporting frame and drive connected with said frame. The bottom of the transport chute is concave at said inlet means and convex at said outlet means has a shape similar to that of a horizontal stylized letter "S". A concave portion of the bottom of the transport chute is located near a feed delivery end, and a convex portion near a discharge end. The bottom of the chutes, its convex portion, is provided with a profile lining with a low coeficient of friction. The feeder has a built in screen in the convex portion of the bottom.

Abstract: The device for wet classification of a mixture of solid components with rect to size, according to the invention, has two circular chutes "2" and "2a" situated tangently next to each other at the same level and equipped with one common feeding nozzle "3". In the outer walls of the chutes "2" and "2a" in the region of their contact there is a distributing hole "5" in which, opposite the inlet of the feeding nozzle "3", there is the dividing wedge "6". The device has separate sieve planes "1" and "1a" fastened to the inner edges of the bottoms of the circular chutes "2" and "2a". A vibratory unit "7" is located on the central vertical axis of each sieve plane.

Abstract: Apparatus for gravity collection and handling of products from jiggers to watering devices, comprising two tanks filled with liquid and interconnected by a passage, and a discharge conduit connected to the inlet nozzle of a dewatering device.Inside the equalizing tank the liquid level is at least as high as that in the feeding tank. The outlet of the feeding tank is provided with the restrictor while the outlet of the equalizing tank is equipped with a regulating element. Granular material from the feeding tank flows through the outlet and falls by gravity into the communicating passage, wherefrom together with liquid supplied from the equalizing tank is fed via the discharge conduit to the inlet nozzle of the dewatering device.

Abstract: Method of separation of a mixture of mineral grains with differentiated sific gravity, under the conditions of a restricted sedimentation, in a cylindrical device, consists therein that the mixture A of the mineral with water is radially supplied to a trough 2 formed around the upper edge of the wall 1 of the water box. The mineral circulating in the trough 2 is desludged and partially separated according to the weight of the grains, and then, under pulsating action of the water, is displaced in a ring-shaped working trough along spiral trajectories towards the conduit 17 and 19 taking out the light fraction D and towards the conduits with a flap 16 for discharge of the heavy fraction C. The pulsating motion of the water is effected by compressed air being cyclically fed to the ring-shaped air chamber 6 via the pulsation valves 14 from a ring-shaped tank 5 arranged around the water box. From the air chamber 6 additional air chambers 7 extend radially beneath the sieve deck 7.

Abstract: A riddle assembly for the grading of particulate materials has a pair of screens forming respective screening stages and disposed one above another. Each of the stages is formed by a pair of longitudinally extending rails interconnected by longitudinally spaced transverse rails having multispan configuration with a pair of outer spans projecting laterally outwardly beyond the longitudinal rails and an inner span interconnecting the two rails and disposed between them. The multispan transverse beams are of nonuniform cross-section corresponding to the distribution of stresses whereby each beam is of uniform strength.