Portable belt type conveyor-elevator

Claim 1

A CONVEYOR-ELEVATOR COMPRISING: AN ELONGATED, SOLID WALLED, RIGID, SELF-SUPPORTING TUBE OPEN AT EACH OF ITS ENDS, DEFINING AN ENCLOSED PASSAGE THROUGH WHICH MATERIAL IS CONVEYED; BELT PULLEYS MOUNTED TRANSVERSELY ON SAID TUBE, ONE ADJACENT BUT SPACED SLIGHTLY LONGITUDINALLY FROM EACH OF ITS OPEN ENDS, THE ROTATIONAL AXES OF SAID PULLEYS BEING CORRESPONDINGLY OFFSET LATERALLY WITH RESPECT TO THE CENTRAL LONGITUDINAL AXIS OF THE TUBE A SUFFICIENT DISTANCE TO POSITION THE RESPECTIVE UPPER PERIPHERAL SURFACES OF THE PULLEYS AND ENDWISE PROJECTIONS OF THE RESPECTIVE LOWER ENDS OF THE TUPE IN SUBSTANTIAL TANGENCY; A FLEXIBLE ENDLESS BELT OF A WIDTH GREATER THAN THE DIAMETER BUT NOT GREATER THAN ONE-HALF THE CIRCUMFERENCE OF SAID TUBE STRUNG OVER SAID PULLEYS WITH ITS UPPER FLIGHT EXTENMDING THROUGH SAID TUBE, AND WITH ITS LOWER FLIGHT EXTENDING EXTERIORLY ALONG THE NETHER SURFACE OF SAID TUBE IN SPACED RELATION THERETO, THE RELATIVELY SMALLER TRANSVERSE DIMENSION OF THE TUBE WALL SERVING AS A GUIDE TO CAUSE THE UPPER FLIGHT OF THE BELT TO SLIDABLY ENGAGE AND CONFORM TO THE CROSS SECTIONAL SHAPE OF SUBSTANTIALLY THE LOWER HALF SEGMENTAL PORTION OF THE TUBE THROUGHOUT ITS LENGTH, THUS FORMING A CROSS SECTIONALLY ARCUATE, TROUGH-LIKE MOVING FALSE BOTTOM FOR THE TUBE WHEN THE BELT IS MOVED OVER ITS PULLEYS; AND POWER MEANS FOR DRIVING SAID BELT OVER ITS PULLEYS TO MOVE MATERIAL DEPOSITED ON THE UPPER FLIGHT OF SAID BELT NEAR ONE END OF THE TUBE, THROUGH THE TUBE WITHIN THE CONFINES OF THE TROUGH-LIKE MOVING FALSE BOTTOM FORMED BY SAID BELT, AND TO DISCHARGE SUCH MATERIAL FROM SAID BELT AT THE OTHER END OF THE TUBE.