Abstract: A mobile corn harvester comprises a chassis on which is mounted an upwardly and rearwardly inclined casing. The forward end of the casing is formed as a hopper into which fall corn stalks cut by cutters at the front of the casing. A rotor rotatable in the casing has a forward portion formed as a helical screw which separates ears from the stalks and transports the ears rearwardly to a thrashing section. The stalks pass down through an opening in the bottom of the casing and are crushed by lobed rollers. The thrashing section comprises a cylindrical screen and a rear portion of the rotor having thrashing loops and pins thereon. The grain kernels pass through the screen into a trough where they are transported to the rear of the casing and then up to a bagging platform. A radial fan at the rear end of the rotor draws off waste material and discharges it onto the field.

Abstract: A corn and cereal thrasher comprises a cylindrical screen in a vertical casing with an annular space between the screen and the casing. A rotor rotatable concentrically inside the screen comprises successively, from the lower end, a helical screw portion for raising grain to be thrashed, thrashing loops and thrashing blades for thrashing grain raised by the screw and projecting it out through the screen, and a radial fan at the top for raising straw and chaff and discharging them through an opening in the casing. Grain to be thrashed is fed to the screw through an opening at one side near the bottom and the thrashed grain is deflected by an inclined plate to an opening on the opposite side of the casing.