US65765A - Harrison ogborn - Google Patents

Description

H. OGBORN. 'WINNOWING SCREEN.

Patented June 11, 1867.

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Lam-3 Patent m. 65,765, datecl June 11, 1867.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, HARRISON OGBORN, of Richmond, in the county of Wayne, and State of Indiana, have invented a new and useful improvement in Screens for Cleaning Grain, especially from oats and I do hereby declare the following to be a full and exact description of the same, suflicicnt to enable others skilled in the art to which my invention appertains to understand and use the same, reference being had to the accompanying drawings, making part of this specification, in which- Figure 1 is a side elevation of my improved screen.

Figure 2 is a rear elevation, and

Figure 3 a plan of the same.

Similar letters of reference indicate corresponding parts in the several figures.

The nature of my invention consists, first, in novel means of giving direction to the blast of the fan, so as to strike the oats as they fall through the screens at such an angle as to change the direction of their fall from a vertical to an inclined plane; and, secondly, in a novel combination of an adjustable hopper, fan, and screens, with delivery spouts and mechanism for imparting reciprocating motion to the screens.

A, in the drawings, may represent the cross-frame of my improved screen, consisting of two frames, placed ,at right angles with anrljointed to each other, held at the bottom by cross-pieces, and at the lower edge oftheir joint by a triangular piece. The longer pieces of the frame A have at their top ends exsections, in the angle of which rests the hopper N, secured to the frame. At the bottom of the rear side of the hopper are holes, which are opened or closed, to allow the grain to fall through, by means of a slide, 0, moving inslots in the frame A, and operated by means of the lcv 'er T, pivoted to the hopper at the centre of the rear side. Suspended by the rods M from the rear upper ends of the frame A, and under the hopper N, are the screens L, consisting of two frames, each provided at its top and bottom side with a screen, K, so as to make the grain as it falls through the frame L pass through four separate screens, and a space between each two of them. Attached to the sides of the lower screen-frame L are plates I, the lower ends of which are again attached to the inclined screenframe H, provided zit both its top and bottom'with a screen and suspended at its-forward end to the shorter frame A by means of rods M. Between this screen-frame and the lower forward end of the screen frame L is situated the mouth of the fan-box D. Attached to the sides of this fan-box D are plates E, holding plates F, the outer edges of which are semicircular, and are notched at their top and bottom. The blast-guides F, con- .sisting of metal plates of a width equal to that of the plates F, are pivoted at their lower forward ends in the plates E, and have pins or rods G attached to them, which are placed in the notches of the plates F, and thus place the Mast-guides F' at difl'crent angles to the screen-frames L, in such a manner that an upward, down.- wnrd, or horizon'tal direction may be given to the blast of air created by the fan. The pinion G is situated on the end of the fan-shaft, and gears with the toothed wheel B, which may be rotated by the handle. Pivoted cccentrically to the pinion C is the rorl'I, the other end of which is connected to the L-shaped lever R, rovided with two holes on each arm to admit of adjusting the reciprocating motion of the screen-frame H, to which the vertical arm of the lever R is attached by means of the rod S The screen-frame H isprovided with two spouts, one, P, at the forward end of the frame to receive and conduct to one side all that passes over the upper screen and the other, Q, attached to ucross-piece, h, on the under side of the frame H, and to which the lower screen is fastened for the same purpose. 7

The principal object of my invention is to produce a machine which will clean graimespeoially spring wheat, from chess, cockle, dirt, and principally oats, and will separate the best and heaviest grain for seed from the lighter. Hcretoforc it has been difiicult to clean wheat from oats, as the grains .of the latter, beingof a long and pointed shape, are apt to fall right through the upper screens on to'the lower ones, and roll over the latter with the wheat into the spouts. But by my improvement this is f obviated The wheat is poured into the hopper N, and falls .th'rough the graduated holes on to the screens L, which have a rapid reciprocating motion. All the larger chess, cockle, and dirt are retained on the screen, and gradually works backward overthe edge of the screen-frame. The finer impurities pass through the other screens, and are caught and shaken off the some. With these the cats fall.through,.point downward, in ayertical position. were the blast from the fan a direct horizontal one, the position of the grains of cats would not be changed, and they would fall through the meshes of the sereens but by placing-the blast-guides F at an angle of forty-five degrees the blast strikes the grain of oats obliquely, capsizing it, and throwing it flat on to the screen, from which it is carried with the chess, cockle, &c., out backward between the screens by the combined action of. the current of air and the shaking motion of the screens, whilst the round and heavy grains of wheat are not afiected by the blast, and fall through the meshes of the screens L on to the lower inclined screens H, the upper one of which is a little coarser than the lower one. Only the largest, best, and heaviest grains of wheat are fit and used for seeding'purpos'es. As the wheat passes 'over the upper screen H all the smaller grains, together with what finer impurities may still be with them, fall through the same on to the lower screen H, leaving on the upper one only the largest, best, and purest wheat for seeding purposes, which is shaken down to the spout P, and carried oil" to one side of the machine, while the smaller wheat of second quality, being cleansed from any still remaining impurities on the lower screen H, moves towards and into the lower spout Q, and is carried ofi to the opposite side of the machine. Thus I am enabled to completely clean the wheat from oats and dirt, and to separate that which is to be used for seed from the smaller grain of second quality;

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is I 1. The apparatus for giving an upward direction to the fan-blast, consisting of the pivoted guide-plates F, provided with rods 6-, in combination with the notched plates F, substantially as described and for the purposes specified 2. The guide-plates F and notched plates F, in comuinationwith the screens L and H, substantially as I and for the purposes setforth.

3. The L-shaped lever R, rods I and S, pinion C on the fan-shaft, a.nd gear-wheel B, in combination with the screens L and H, arranged substantially as described.

4. In combination with the above, the adjustable slide 0 and pivoted lever T, substantially as and for the purposes set forth.

, HARRISON OGBORN. Witnesses:

ALEX. A. C. KLAUCKE, JOHN A. Wmnsnsnsm.

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