Classifier with gas flow distributor

Claim 1

APPARATUS FOR EFFECTING A UNIFORM CLASSIFICATION OF GAS ENTRAINED PARTICLES, COMPRISING A SUBSTANTIALLY UPWARDLY EXTENDING MAIN EXHAUST DUCT, GAS FLOW CONTROL MEANS INCLUDING A PLURALITY OF SMALLER SUBSTANTIALLY UPWARDLY EXTGENDING EXHAUSE DUCTS IN SAID MAIN EXHAUSE DUCT, MEANS FOR PROVIDING A PRESSURE DIFFERENTIAL ACROSS SAID GAS FLOW CONTROL MEANS TO PROVIDE GAS FLOW THERETHROUGH, MEANS FOR CONVEYING A STREAM OF THE GAS ENTRAINED PARTICLES DOWNWARDLY IN FRONT OF SAID GAS FLOW CONTROL MEANS THEREBY PROVIDING PASSAGE OF GAS THROUGH THE STREAM OF DOWNWARDLY FLOWING PARTICLES AND THROUGH THE PLURALITY OF SMALLER EXHAUST DUCTS TO REMOVE PREDETERMINED ONES OF THE PARTICLES FROM THE STREAM, THE PASSAGE OF GAS THROUGH THE STREAM ACTING TO DECRESE THE DOWNWARD FORCES ACTING ON THE PARTICLES SAID GAS FLOW CONTROL MEANS PROVIDING RESISTANCES TO THE FLOW OF GAS THERETHROUGH INCRESING IN A DOWNWARD DIRECTION THEREALONG THEREBY TO PASS GS AT SUCCESSIVELY LOWER VELOCITIES THROUGH THE STREAM TO PROVIDE A NET FORCE ON THE PARTICLES THAT REMAINS SUBSTNTIALLY CONSTANT.