Threshing cylinder in combination with a rotary separating drum

Claim 1

APPARATUS FOR THRESHING AND SEPARATING GRAIN FROM STRAW AND THE LIKE, COMPRISING: A GENERALLY HORIZONTAL CYLINDRICAL CASING HAVING ANNULAR WALL MEANS AND FRONT AND REAR ENDS, SAID CASING HAVING A STRAW OUTLET AT ITS REAR END AND A CIRCUMFERENTIAL BOTTOM PORTION OF SAID WALL MEANS AT SAID FRONT END HAVING AN OPENING THEREIN AFFORDING A GRAIN AND STRAW INLET, AND A PORTION OF SAID WALL MEANS THAT EXTENDS BETWEEN SAID INLET AND OUTLET BEING IN THE FORM OF GRATE MEANS PROVIDING A GRAIN OUTLET; THRESHING MEANS INCLUDING A THRESHING CONCAVE SPACED FORWARDLY FROM AND AT A LEVEL BELOW SAID INLET AND ARCUATE ABOUT AN AXIS TRANSVERSE TO THE CASING AXIS AND A THRESHING CYLINDER JOURNALED ON SAID TRANSVERSE AXIS AND CLOSELY COOPERATIVE WITH SAID CONCAVE SO THAT THE UNDERMOST PORTION OF THE CYLINDER IS AT A LEVEL BELOW THAT OF SAID INLET; MEANS FOR ROTATING SAID CYLINDER SO THAT SAID UNDERMOST PORTION TRAVELS UPWARDLY AND REARWARDLY; MATERIAL TRANSFER MEANS EXTENDING REARWARDLY AND UPWARDLY FROM A FRONT JUNCTION WITH THE REAR OF THE CONCAVE TO A REAR JUNCTION WITH THE WALL MEANS ABOUT SAID INLET, SAID TRANSFER MEANS INCLUDING TRANSITION WALL MEANS HAVING AT SAID FRONT JUNCTION A FLAT PORTION SUBSTANTIALLY COEXTENSIVE IN WIDTH WITH THE REAR OF THE CONCAVE AND EXTENDING UPWARDLY AND REARWARDLY AND GENERALLY TANGENT TO THE CONCAVE AND FURTHER HAVING A REAR PART SHAPED AT ITS REAR JUNCTION TO CONFORM TO THE CASING WALL MEANS ABOUT SAID INLET; ROTARY MEANS COAXIALLY WITHIN THE CASING AND SUBSTANTIALLY COEXTENSIVE WITH THE GRATE MEANS FOR MOVING GRAIN AND STRAW CIRCUMFERENTIALLY AND AXIALLY OVER THE GRATE MEANS; AND A ROTARY PART COAXIALLY AHEAD OF THE ROTARY MEANS AND SITUATED ABOVE SAID INLET SO AS TO OVERLIE THE REAR PART OF SAID TRANSITION WALL MEANS, SAID ROTARY PART HAVING A HELICAL ELEMENT THEREON FOR MOVING GRAIN AND STRAW REARWARDLY FROM SAID INLET TO SAID ROTARY MEANS.