. Farm machinery and farm motors. FIG. 173—SHELLING MECHANISM OF CYLINDER SHELLER presenting a corrugated surface which cannot wearsmooth. Within this a revolving iron cylinder withspiral vanes threshes the corn against the surfaces of therod cylinder. The vanes approach the rods sufificientlyclose to keep every ear in rapid motion, shelling one earor one bushel with the same facility. A regulator at thedischarge end places the machine within control of theoperator. The spaces between the rods allow the shelledcorn to escape freely, thus lessening the draft, relievingthe cylinder from clogging
. Farm machinery and farm motors. FIG. 173—SHELLING MECHANISM OF CYLINDER SHELLER presenting a corrugated surface which cannot wearsmooth. Within this a revolving iron cylinder withspiral vanes threshes the corn against the surfaces of therod cylinder. The vanes approach the rods sufificientlyclose to keep every ear in rapid motion, shelling one earor one bushel with the same facility. A regulator at thedischarge end places the machine within control of theoperator. The spaces between the rods allow the shelledcorn to escape freely, thus lessening the draft, relievingthe cylinder from clogging and from all liability to cut or 230 FARM MACHINERY grind the grain. The cylinders are made adjustable tosuit various sizes of corn. 320. Self-feeder.—The purpose of the self-feeder is tocarry the ears to the shelling mechanism. The springshellers are provided with feeder chains, which carryteeth to end up the ears and carry them directly toeach set of shelling wheels, or to each hole, as it is n. FIG. 174—lA SIX-HOLE POWER SHELLER called. The cylinder sheller uses a double chain con-veyor with slats between, as it is not necessary to endup the ears. In all spring shellers provision must bemade for forcing the ears into the holes. This is accom-plished by adding picker-feeding wheels or a beater. 321. Extension feeders.—In shelling corn from largecribs, extension feeders are provided to circumvent the CORN IMACIIINERY 23I carrying of the corn by hand. These are provided withdouble-chain conveyors and may be had in sections, mak-ing a drag conveyor which may be extended to almostany direction from the main feeder. 322. Separating device.—To separate the corn and thecobs, the whole, after passing through the shellingmechanism, is made to pass over a cob rack which per-mits the corn and chaff to pass through. The cob rack ismade in at least three ways—a vibrating rack, a rodrack with rakes, or an endless rack with thumpers under-neath. The latter two have advantage in
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