US149850A - Improvement in middlings-purifiers - Google Patents

Description

' 2Sheets--Sheet.

L. GATH MANN. T

Y Middlings-.Puriiiers- No.l49,850. PatentedApril21,1a74.

ATTEST:

LOUIS GATHMANN, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN MIDDLINGS-PURIFIERS.

Specification forming part of Letters Patent No. 149,850, dated April 2l, 1874; application led February 7, 1874.

T0 all whom it may concern:

Be it known that I, LoUIs GATHMANN, of Chicago, in the county of Cook and State of Illinois, have invented an Improvement in Middlin gs-Puriiers, of which the following is a specification j The nature of this invention relates to a machine having for its object, first, to separate the iine flour from the middlings, secondly, the separation of the line from the coarse middlin gs; thirdly, the elimination of the dust and impurities, and the subsequent separation of the offal from the purified middlings. The invention consists in the peculiar construction of the machine in its several parts, as more fully hereinafter set forth.

Figure 1, Sheet l, is a perspective view. Fig. 2 is a cross-section of the vibrating screen-frame on @0 Figi. Fig. 3 is an enlarged detail in elevation of the eccentric on the fan-shaft, and its frame for vibrating the screen-frame. Fig. 4, Sheet 2, is a central longitudinal section of the machine. Fig. 5 is a cross-section at y y, Fig. 4. Fig. 6 .is a detail elevation of the knocker-bar and its actuating crank-pin.

In the drawing, A represents the frame and external casing of the machine, with a hopper, A', at the upper rear corner, through which the unpurified middlings are fed in, the iniiuent stream being divided and received bythe ends of the bolting-cloth-covered screens B B B, which project into the hopper, the volume to each screen being regulated, or shut ofi' altogether, by slide-boards a a a, if one or more of said screens be removed from the frame D. The screens are inclined to the front, and underneath eachis a sheetmetal returning-board, C C C, inclined in the opposite direction, being also longitudi-` nally arched to throw the material passing through the screens to the sides, passing out journaled. On each side of the blower-case an eccentric, c, is secured to the shaft. A yoke-frame, d, embraces the eccentric, and is connected, by the rod e, to one side of the frame D, to vibrate the said frame longitudinally on its supports, the other eccentric being connected in like manner to the other side of said frame. The front end of the casing is closed by a door, in which are hung several adjustable blind-slat valves, f, to regulate the iniiuX of air to the fan through the casing. The middlings fall from the tail of the lower screen upon short inclines G, pitched in opposite directions, at the front of the machine, falling from incline to incline, while the suction of the fan will draw away the lighter stuff, the heavier falling perpendicularly, to be caught by the projecting lip from the edge' of the next incline below. These inclines are adjustable as to the angle of inclination to suit the varying grades of grain being ground. The heavy or clean coarse middlings are deposited upon a coarse-meshed screen, H, inclined to the rear, to be sifted. All that passes through drops on a board, which leads it to a side discharge-opening, I, while the coarse oii'al and shorts passing over the tail of said screen H are discharged at K, and all the specks and light furze are drawn back by the fan and discharged through its spout L. By means of valve-openings in the sides of the casing, part of the air drawn in by the fan may be caused to enter through these side openings, and pass upward through the three upper screens, to prevent the light line stuff from passing down through these screens, the balance of the suction being taken through the valves in the front of the casing. At 'one side of the frame and casin g is a vertical rod, M, with a horizontal knockerbar, h, to pass under each screen, being pivoted to the casing at the point where it passes through, its inner end striking underneath the middle stile of the frame. At the lower end of the rod M a spring, fi, is attached, to pull it down forcibly when free to drop, and thus cause the knocker-bars to strike a smart blow. The lifting of the knockerrod M is accomplished by a crankpin, k, on the side of a disk, N, passing, under a toe, l, on the rod J@he frame D, with relation to the hopper A M. The disk N is mounted ou a, shaft or and spouts E I K in the easing A, subsmu stud, m, at; the side of the easing, and on the tially as und for' the purposes set forth.

same sleeve is a pulley, O, driven by a crossbelt, P, from the fan-shaft. LOUIS GATHMANN' I eluim- Witnesses:

The arrangement of the screens B, B', B, y WM. H. LOTZ,. and H, and the innings e of e" G G G G in ARTHUR, P, JOY.

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