JIGGING CLASSIFYING MACHINE Russian patent published in 1998 - IPC

FIELD: concentration of minerals; wet gravitational extraction of gold nuggets and other noble metals from gravel deposits; classification of materials by sizes. SUBSTANCE: machine includes frame, chamber, drive, screen, double-arm lever connected with screen and drive which may perform incomplete revolution around fixed axle. Screen is provided with shoulders. One arm of lever is rigidly connected with screen or with its box to reduce horizontal amplitude and to increase vertical amplitude of vibrations along screen towards delivery of material. When vibration exciter is switched on, lever starts swinging to the right and to the left transmitting its vibrations to arm which starts rising or lowering. Screen executes similar motion. Material to be concentrated gets suspended when comes to the screen, disintegrated, separated by density, classified, after which it is dewatered and transported beyond chamber boundaries. EFFECT: enhanced efficiency. 1 dwg