US35536A - Improvement in fanning-mills - Google Patents

Description

n l .n UNITED STATES PATENT GFFICEC Y fhirnANxLiN MiLns, oFRooHEsrni-i, 'Nnw YORK..

f ilviPRovi-:M ENT IN FAN NiNG-.M i LLs.

` `Speciiication forming part of Lot-ters Patent No, 35,536, dated June 10, 18122.

To @ZZ whom itjmayconcem n Beit known that I, FRANKLIN MILEs, of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Fanning-Mills and Grain-Separators; and I do hereby declare that the following is afulland exact description thereof, reference being had to the accompanying drawings, making part of this specijfcation, in-which` upper, and Dthe lower, shoe; E, the drum,

`and F the fauor blower. The fan is driven by a pinion on its shaft,which gears with the cogwheel G, to which a winch is applied for turn` `ing. (Not shownin the drawings.)

Vibratory motion 'is imparted to the shoes containing the sieves by means of a connecting! rod, a, Fig. i 2, between a crank in the end of the fan-shaft 'and the crank-arm b on the end of the shaft c, which extends through from side to side of n the mill between the shoes C D, and is` connected with each by means of a double crank, d, one arm of which extends upward andconnects with an eye, f, on shoe C, and the other` is connectedin a like manner with shoe D below. `The oscillations received by the shaft c, from its connection with the fanshaft,xvibrate the shoes alternately forward and back in a nearly horizontal line, they being hung by straps e e, pivoted to the sides or frame. To render this motionV more effective, I combine with it a suddenvertical vibration or jarproduced bythe concussion of' the peculiar bearings with which I provide the rock-A shaft c. Instead of having it roll in the usual smooth boxes,` I attach to it a metal bearingpiece, H, Fig. 2, which is provided with two semicircularprojections, g g, on its lower edge, the positions of which are outside vof a perpendicular line through the axis of the shaft. These projections rest in corresponding semicircular recesses, h h, in another plate, I` which Iis permanently attached to the side of the machine. Thus the rock shaft rests on the double bearings gg, and when in operation the motion consists not in partially revolving it, but

in transferring its bearing alternatelyf rom one socket h, to the other. This produces a sudden concussion of the shoe at each horizontal vibration, the effect of which is to jar they grain upon the sieves and free it from clogging with the'chaff, or otherwise accumulating in the meshes thereof, and thereby greatly increases their efficiency. This additional and accelerated motion is obtained with little or no additional expense or loss of power, as the bearings g g, being smaller, produce less friction than the ordinary smooth bearing.

I form the inclined bottom screen of the lower shoe by using two sieves, I J, fboth of which `are of a size corresponding with those employed in the two lower grooves, c w, of the upper shoe, and upper groove, x, of the lower shoe, so as to admit of substituting one for the other, and transposing their positions, when4 such a change is required, to adapt the machine to cleaning or separating diiferent kinds of This is a great convenience, as such grain. changs are often necessary to render the operation perfect. i

The sieves I J fit together closely, so that .when those of small meshes are used the grain passes readily over the surface of both Without interruption. An inclined board, N, is placed below them to receive any grain or other mat .ter which may be allowed to pass through, by

using coarse sieves in the place of I or J, and discharge it at o. That which is carried over the sieve I J is deposited atp.

The grass-seed is separated by the sieve m at the point where the grain is taken from the hopper onto the shoe in a receptacle, Q,When it may be discharged through the aperture r.

This is an improvement in the arrangement, p

the advantages of which are that the grass-seed is separated at once after leaving the hopper S, before it has been exposed to any of the blast of fan, by which, from its lightness, some portions would be inevitably blown away and lost.l The seed box Q occupies a position where it is leastin the way, and does not obstruct the blast; but, on the contrary, contributes to direct and concentrate iton the fallinggrain at the rear part of the shoe.

To the sliding feed-board L, for regulating the size ofthe opening` in the hopper, by which the grain and chaff descend upon the screen, I attach a guide stem or handle, T,whieh is provided with a long dat spring, u, lying longitudinally en its under side. Both thestem and spring pass through a mortise in the tranverse frame-piece A, and the pressure of the spring is sufficient to hold the board in any position in which it is placed,while the stem Tenables it to be adjusted with ease, as it insures the board working truly in its grooves, and when grasped by the hand for the purpose of moving it the spring is likewise compressed; and its pressure 'thus taken off. This is essential to the uniform working ot' the feed-board, .for without it the vibration of the machine has a tendency to displace the board L from any' given position.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. Compounding the motion of the shoe or shoes, when shaken horizontally, by the addition ofthe abrupt vertical vibration or jar, by means of the double bearing H of the rockshaft o, and the sockets g g, substantially as and for the purposes described.

2. The combination and arrangement ofthe my name in the presence of two subscribing witnesses.

FRANKLTN MILES.

Witnesses:

It F. OsGooD, D. G. J oiuNsoN.

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