Apparatus for specific gravity separation of solid particles

Claim 1

A COMPOUND WATER CYCLONE COMPRISING A VESSEL, A TUBULAR VORTEX FINDER AXIALLY ARRANGED WITHIN SAID VESSEL AND HAVING AN UPPER EDGE AND A LOWER EDGE, SAID VESSEL HAVING A CYCLONE CHAMBER THEREIN, SAID CHAMBER HAVING AN UPPER ANNULAR PORTION SURROUNDING SAID VORTEX FINDER AND A CONTIGUOUS LOWER CONICAL PORTION BELOW SAID VORTEX FINDER, SAID CONICAL PORTION HAVING AN APEX ORIFICE AND THREE SUCCESSIVE FRUSTO-CONICAL SECTIONS OF DECREASING INCLUDES ANGLE EXTENDING FROM SAID ANNULAR PORTION TO SAID ORIFICE, A FIRST ONE OF SAID FRUSTO-CONICAL SECTIONS HAVING AN INCLUDED ANGLE OF ABOUT 100-140*, A SECOND ONE OF SAID FRUSTO-CONICAL SECTIONS HAVING AN INCLUDED ANGLE OF ABOUT 70-80*, AND A THIRD ONE OF SAID FRUSTO-CONICAL SECTIONS HAVING AN INCLUDED ANGLE OF ABOUT 15-30*, SAID ANNULAR PORTION OF SAID CHAMBER HAVING AN INLET LEADING TANGENTIALLY THEREINTO, SAID CHAMBER HAVING A CYLINDRICAL PORTION ABOVE SAID VORTEX FINDER AND AN OUTLET LEADING THEREFROM, SAID FIRST AND SECOND FRUSTO-CONICAL SECTIONS HAVING A FIRST CIRCULAR LINE OF JUNCTURE LYING IN A FIRST TRANVERSE PLANE, SAID SECOND AND THIRD FRUSTO-CONICAL SECTIONS HAVING A SECOND CIRCULAR LINE OF JUNCTURE LYING IN A SECOND TRANSVERSE PLANE, THE DIMENSIONS OF SAID CHAMBER BEING IN ACCORDANCE WITH THE RELATIONSHIP