Portable dry concentrator for ores

Claim 1

IN A DRY CONCENTRATOR FOR ORES INCLUDING AN AIR PRESSURE CHAMBER OPEN TO THE TOP AND A HOLLOW CONCENTRATING TABLE HAVING PERVIOUS-TO-AIR TOP AND BOTTOM SURFACES DISPOSED IN FACE-TO-FACE SPACED RELATION WITH RESPECT TO EACH OTHER, SAID TABLE BEING DISPOSED IN SUPERIMPOSED RELATION WITH RESPECT TO AND CLOSING THE TOP OF SAID CHAMBER, THE IMPROVEMENT CONSISTING IN PROVIDING MEANS FOR CREATING EDDIES IN THE AIR PASSING THROUGH THE TABLE FROM SAID CHAMBER, SAID MEANS COMPRISING A PLURALITY OF BARS DISPOSED TRANSVERSELY WITHIN SAID TABLE IN SIDE-BY-SIDE SPACED RELATION WITH RESPECT TO EACH OTHER, SAID BARS HAVING THEIR BOTTOMS IN ABUTTING RELATION WITH THE BOTTOM SURFACE OF SAID TABLE AND THEIR TOPS IN ABUTTING RELATION WITH THE TOP SURFACE OF SAID TABLE, EACH OF SAID BARS BEING FORMED WITH A PASSAGE FOR AIR EXTENDING FROM THE BOTTOM TO THE TOP FOR CONDUCTING AIR FROM THE BOTTOM SURFACE OF SAID TABLE TO THE TOP SURFACE, SAID PASSAGE BEING FORMED SO THAT AIR PASSING THERETHROUGH AND AIR PASSING BETWEEN SAID BARS EDDIES WHEN COMMINGLED ABOVE SAID TABLE TOP SURFACE.