Improvements in or relating to machines for thrashing, hacking and bruising the straw of wheat, oats, barley and the like, and for separating the grain from the straw and chaff

摘要

313,182. Casali, A. Jan. 9, 1928. Thrashing - machines; straw softening.-Corn and straw from the beater A and concave B fall upon a stationary dressing box C, and pass down over a stepped sieve T, F, the holes in which are preferably funnel-shaped. The feed of the material over the sieve is regulated by a damper D. A distributing valve divides the space under the sieve into two portions and a powerful blast of air is directed by a blower G through the part E of the sieve above the first portion thus lifting the straw and chaff from the sieve and allowing the grain to tall through on to a slope f that directs it to a collecting box L. The other portion F of the sieve permits the passage of any small quantity of grain that has been carried on by the straw and chaff. From the box L the grain passes on to a sieve P through which a blast of air is directed by a blower I to remove the last traces of chaff. This chaff may be directed out of the machine by opening a valve Q, or if the valve is closed the chaff is directed into a straw-header consisting of a beater S and concave R where it mixes with the straw and chaff passing off the sieve E, F. The chaff and chopped straw escaping from the header pass over another stepped sieve V, Z through which any last few grains fall; a blower U directs air through this sieve. A curved plate T which normally directs the straw to the header may be replaced by a table bridging the beater when long straw is required. The sieve Z can be turned upwardly into the machine for transport or it may be mounted on a separate frame detachable from the main frame and provided if required with wheels for transport.