Fluid-motion powder, electric bath furnace

Claim 1

ELECTRIC HEATING APPARATUS OF FLUIDIZED ELECTRO-CONDUCTIVE POWDER RESISTANCE COMPRISING, MEANS DEFINING A CHAMBER AND A SUPPORT SURFACE FOR SUPPORTING WITHIN SAID CHAMBER A BED OF ELECTRO-CONDUCTIVE POWDER PARTICLES, MEANS ON SAID APPARATUS DEFINING A MAIN GAS DISCHARGE OUTLET FROMSAID CHAMBER, MEANS FOR FLUIDIZING THE BED OF POWDER PARTICLES COMPRISING, MEANS TO FLOW A GAS THROUGH SAID BED OF POWDER PARTICLES AND OUT OF SAID MAIN GAS DISCHARGE OUTLET, MEANS TO FLOW AN ELECTRIC-CURRENT THROUGH SAID POWDER PARTICLES, A RECIRCULATION SYSTEM TO RECIRCULATION AT LEAST A FRACTON OF SAID GAS THROUGH SAID BED OF POWDER PARTICLES COMPRISING A GAS INLET INTO SAID CHAMBER AND ANOTHER INLET INTO SAID RECIRCULATION SYSTEM, MEANS TO PRECLUDE LOSS OF SAID PARTICLES THROUGH SAID MAIN GAS DISCHARGE OUTLET COMPRISING, MEANS TO APPLY A GAS CURTAIN UNDER PRESSURE ACROSS SAID MAINDISCHARGE OUTLET AND THEREBY ACROSS THE FLOW PATH OF SAID GAS FLOWED THROUGH SAID BED AND ENTERING SAID MAINGAS DISCHARGE OUTLET AND COMPRISING MEANS TO FLOW SAID GAS CURTAIN IN A DIRECTION TOWARD SAID ANOTHER INLET OF AID RECIRCULATION SYSTEM, AND MEANS IN SAID RECIRCULATION SYSTEM TO APPLY A SUCTION TO SAID ANOTHER INLET.