US106949A - Improvement in revolving grain-screens - Google Patents

Description

F MILLS.

Grain Screen.

No. 106,949. Patented Aug. 30, 1870.

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Letters Patent No. 100,949, dated August 30, 187 0.

IMPROVEMENT IN REVOLVING GRAIN SCREENS.

The Schedule referred to in these Letters Patent and making part 01 the same To all whom it may concern Be it known that I, FnAxoIs MILLS, of Mount Vernon, in the county of. Posey and-State .ot .-'Indi ana, have invented a new and. improved Revolving Screen for Cleaning Grain; and 1 do hereby'declare' thatthelfollowing is a full, clear, and exact descrip- Myimfentionhasfin its objectto furnish an intproved revolring screen, for separating small seeds from ivheat or other grain, which shall be simple in construction and effective in operation ;.,and

It consists iuthe construction and combination of the various parts of the machine, as hereinafter more fully described. I

A represents the box or caseQof'the machine, which is. made witlrlegs, of such length as to raise the machine to a convenient height.

B is the screcn,whicb is made :t apering,'aud in the shape of the frustum. of :tpolygohal pyramid, and

which is rigidly connected with theisbatt C, so as to be carried with said shai't'iu itsjrerolution The screen iscoveredwith wire-cloth, of such a fineness as ,to allow the small ,seeds,'whicb it is designed to remove, to pass through, and which the grain to be screened or cleaned cannot pass through.

As the small seeds pass through the screen 15, they fall upon the inclined bottom of the box A, and pass out ofthe machine through the spout I).

The grain is introduced through the pipe E, at the center of the smaller end of the screen B, which said smaller end of said screen is supported by arms 12, the outer ends of which are attached to the end-plateof the screen B, and the inner ends of which are attached to the shaft 0, the said arms being so formed f as to pass around the end of the pipe E, as shown in fig. 1.

As the grain passes back through the machine, it is kept stirred np by the inner ribs b of the screen 13, and when it reaches the rear end of the said screen, it istake n up by the inclined blocks or-plates b, attached to the rear end plate of the screen B, at the rear sides of the discharge-openings through said plate. 1

As the screened grain passes :out of the" screen 13, it falls through thezspa'ce between the end of the screen-and the endof the box, and passes out through thespout I being kept from again mixing with the small seeds by the cleats or flanges G, attached to the inner sides of the box A, at the end of the screen B, as shown in the drawing. I

Y The screen Bis revolved byaneans of a'crank, H,

attached to the projecting end of the journal of the shaft 0. r l

The pipe E passesou't through the forward end of tbeboxA.

, J is'the feed-hopper, which is suspended by jointed connections K to the case A.

To the lower part of the inner hopper is attached a downward]y-projecting arm, N, the lower end of which rests upon the spur-wheel 0, attached to the shaft 0, so that, as the said shaft 0 revolves, the hopper J will be jarred, to hasten the escape of the grain from the said hopper.

From the hopper J the grain passes into the pipe E, and passes thence to the screen B, in the manner hereiubefore described.

Having thus described my invention,

\Vhat I claim as new, and desire to secure by Letters Patent, is-- The combination in the grain-screen B herein described, of the hinged hopper'J and lug N, with the sprocket-wheel O and shaft 6, all constructed and arranged as shown and described, for the purposes Witnesses:

J AMES GHENY, WM. P. LEONARD.

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