US372308A - And john goedon - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1. G. A. GILBERT & J. GORDON.

MIDDLINGS PURIFIER.

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(No Model.) 2 Sheets-Sheet 2. G. A. GILBERT '& J. GORDON.

MIDDLINGS PURIFIER Patented Nov. 1, 1887.

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UNITED STATES P TENT price.

GEOBGE A. GILBERT, OF MILIVAUKEE, WVISGONSIN, AND JOHN GORDON, OF LINCOLN, ILLINOIS.

MIDDLINGS-PURIFIER.

SPECIFICATION formingpart of Letters Patent No. 372,308, dated November 1, 1887.

' Application filed December '1, 1885. Serial No. 184,934. (No model.)

To all whom, it may concern.-

Be it known that we, GEORGE A. GILBERT and JOHN GORDON, of Milwaukee, in the county of Milwaukee, and in the State of Wis- 5 consin, and of Lincoln, in the county of L- gan, and in the State of Illinois, respectively,

have invented certain new and useful Improvements in llliddlings-Purifiers; and we do hereby declare that the following is a full,

IO clear, and exact description thereof.

Our invention relates to middlings-purifiers; and it consists in certain combinations of parts, described, and then pointed out in the claims.

In the drawings, Figure 1 is a vertical lon;

I gitudinal section of a iniddlings-purifier embodying our invention. Figs. 2, 3, and 4 are details of construction. Fig. 5 is a vertical transverse section taken through Fig. 1. Fig. 6 is a detail, in elevation, of the perforated steps over which the stock falls as it passes under the feed-roll. Figs. 7 and 8 are details. Fig. 9 is a transverse vertical section of the boltingframes.

A A A represent the timbers of the frame of our device, in the lower portion of which are located the boards B B, forming a continuous hopper, B, extending throughout the entire length between the front and rear upright timbers of the frameover the conveyers O G,

0 which latter are located in boxes of the ordinary construction. In the lower part of said hopper is located a rod, D, supported at each end in the front and rear boards of the frame, and on this rod at regular intervals there are 5 strung the angular levers E, having each a central eye encircling said rod, as shown.

One end of each angle-lever is inserted in a slot or groove in the slides F F, which slides move upon grooved ways f f, and the slides F are further provided with handlesf the drawing upward of which will serve to raise the slides F; and as the angle-piece E of each pair of slides is fulcrumed on the rod D, when any slide F is lowered, its counter-slide, F, is thereby raised automatically, opening a passage at the point between the hopper B and the box of the conveyor O, as shown in Fig. 5, and vice versa. At the front end of the conveyerboxes is located the delivery-spout G centrally divided to form a spout for each conveyer, and the from boards of the hopper B are slotted, as shown at B for the admission of air.

B B represent longitudinal slotted portions above the tops of the boards B B of the hopper B, extending the entire length of the device, and above these slotted portions are the side boards,GG,of the machine,between which extend the radially-disposed partitions H H H, forming air-chambers h h between them.

I is the decking or top board of the machine, which extends back from the hopper J to the fan K, while from above said fan and parallel with the rear partition, H, there extends another decking, H, which continues down to nearly the base of the rear of the machine, forming another air-chamber, h. This decking H also extends forward at an angle above the fan K and forms, with a parallel baseboard, I, and side boards, i, a discharge-spout, 7c 03, for the fan K. All of the air-chambers h h h, 850., open, of course, to the fan K, and to regulate the .draft at the upper ends of the airchambers door-valves 7c is k are provided, moved loybolts passingthrough the side boards, 7 5 G G, in quadrant-slots Z Z Z. The base or widest part of each air-chamber h is provided with two plates of perforated zinc, the lower plate of which is stationary and continuous from the decking I, at the point a, to the limit of the rear chamber, h, at b, and continued down to the base of the airchamber h at the pointc, while the upper plate is in section and movable, as hereinafter explained, in orderto increase or diminish the size of the openings in the two plates 0t perforated zinc at will, as shown in detail in Figs. 7 and 8, where M represents the lower stationary plate of zinc, with perforations m m, while M is the upper movable platewith perforations m m. At stated intervals cross strips L extend from one side board G to the other, there being one under every partitionH, and one between each two partitions, and these strips are T- shaped in cross-section, as shown in Fig. 1.

G G are strips secured longitudinally along the inner sides of the side boards, G G, and to the upper edges of these strips and the lower edges of the vertical part or shank of the T-shaped strips.L is fastened the plate M,

of perforated zinc, while the movable sections M are located on top of the stationary plate M and under the horizontal wings of the T- shaped strips. The sections M are about half an inch less in width than the space between the side boards, G G, and the openings at and m are each onlya quarter of an inch in width, (by an inch in length,) and hen'cea quarter of an inch movement of the plates M will serve to wholly close the said openings and any less movement to diminish the width of said openings to any degree required.

N N represent bolts passing through the side boards, G, the inner ends of which are riveted to the plates M, while the outer ends are screw-threaded and provided with thumb nuts N; and by loosening these nuts on one side and tightening the correspondingnuts on the other side the movable plates M may be drawn either way, and the openings on m thereby regulated, controlling the draft of air into the air-chambers h h at will.

Below the hopper J, at the front of the machine, is a slotted wall, B, extending down as far as the partition A and in line with the vertical wall or front board of said partition, for the purpose of admitting air through the perforations in the risers of the metal steps 0, over which the stock or impure middlings falls as it passes under the feed-roll J at the base of the hopper J. These steps are shown in detail elevation in Fig. 6, wherein the slightly-inclined solid portions (having just sufficient pitch for thestock to freely fall over) are marked 0, and the perforated vertical risers are marked 0. These steps are arranged preferably in series of two short and one long (or high) risers, as shown, there being in the illustration given three of such series between the feed roll J and the inner end of the horizontal partition A. At the rear of the machine there are located similar steps, 0, for the reception of the failings as they fall from the bolting-cloth, (to be hereinafterdescribed,) which steps extend from the top of the rear partition, A at the point (I to the tailingsspout C at the point e.

B is a slotted door, (of which there is one on each side of the machine,) to admit air under the steps 0, and also to afford access for oiling, &e., to the rear ends of the conveyershafts, &c.

P is the frame of the bolting-cloth, and consists of strips of wood arranged to form three sides of a rectangle, and having inner strips of less height, while between the two sets of strips the edges of a piece of bolting-cloth, p, are secured, which cloth is not drawn tightly enough to strain the meshes, but which has naturally some little sag to it, which sagging is prevented, as shown in Fig. 9, and afterward explained. Below the side edges ofthis frame P are those of a similar rectangular frame, Q, (which has four sides complete of equal hcight,while the fourth side or rear end of the frame P is only a transverse strip below the rear edge of the cloth,) and this frame Q has likewise strips of less height, while between these two sets of strips the edges of a screen, q, of flattened wire-cloth, are secured, which wire-cloth is drawn to a tight tension to prevent the bolting-cloth immediately above from sagging.

By flattened wire-cloth we mean such as has been rendered smooth and even on both sides without any ridges where the strands of wire cross each other.

The frames P Q are secured to each other by links q,which permit reciprocating motion of the two frames, while the upper frame, P, is suspended, by vibrating hangersp, from the side boards, G G. Motion is connnni'iicatcd to these frames by means of eccentrics and their rods, as follows: A strip, Q, extends longitudinally under the screen q the whole length ofthc frame Q, (being beveled attop, as shown, so as to interfere as little as possible with the descent of the sifted material through the meshes of the screen at that point,) and at the center of this strip Q a crossstrip or crosspiece, Q, is secured,with depending pin q, which pin supports a boxing, R, containing (on each side of this pin) blocks of rubber rr, while the boxing is slotted around the pin to give opportunity for adjustment, and thereby (with aid of the set-screw r) to vary the degree of compression of the rubber blocks, which serve as cushions at the end of the connectingrod S, leading from the eccentric T on shaft t, supported and driven by power at the front of the machine. This eccentric T is larger than those (T T) which are connected by the rods S S,boxings R It, and studs 2' r to the sides of the frame P, whereby the travel of the lower frame is from one-eighth to thrce-eighths of an inch farther than the travel of the upper frame, which carries the bolting-cloth.

The object in making the lower or screen frame travel a greater distance than the upper or bolting-cloth frame is to promote the rearward and downward travel of the stock on the bolting-cloth (there being a slight pitch to the frames, as shown) and to insure a more perfect sliding movement of the stock than heretofore. The bolting cloth lying somewhat loosely 011 the screen accomplishes two very desirable results-lirst, preventing the breaking up of the middlings, and, secondly,keeping the light fluffy matter always on top of the mass, so as to be readily drawn up into the air-chamber.

By our machine, as the impure middlings are fed from the hopper J over the steps 0, a great deal of the dust and fluffy impurities is sucked into the front air-chambcrs, h h, through the perforated zinc bottoms M M of said chambers before the stock reaches the cloth, and after that, by reason of our zinc bottoms being located very near the cloth, (in practice about four inches above only,) we can remove the dust and fluff by a more delicate draft and without danger of drawing up the lighter middlings than if the air-chambers were located at any considerable distance above the bolting-cloth. Again, we have provided means for independently regulating the draft through our air-chambers at both bottom and top; and, further, we have means for drawing the impurities out of the tailings by our rear air-chamber, h, and steps 0'.

Our system of driving is as follows: Power is applied to the driving pulley U on shaft t, (which carries the eccentrics T,) whose other end carries a small sprocket-wheel, a, from which a sprocket-chain, u, runs to a large sprocket wheel, U, which, with a small sprocket-wheel, U (shown in dotted lines in Fig. 1,) cast on the hub of the large wheel U, is mounted on a stud, a projecting from the frame, and from the small sprocket-wheel U a sprocket chain, 7), runs to a larger sprocketwheel, V, (about the size of the driving-pulley, but much smaller than the wheel U,) on a transverse shaft, 22, which, by means of bevel-gears, runs the two conveyers O O, and which shaft '0 has another sprocket-wheel at its other end connecting, by a long sprocketchain, 10, (extending the entire height of the frame,) with the sprocket-wheel on that end of the feed-roller shaft W. On the end of the driving-shaft t, opposite to the driving-pulley, is another pulley, X, from which extends a belt, 00, to a pulley, Y, on the end of the shaft Z, which drives the fan K. P P represent ordinary shields to prevent the stock from falling'over the edges of the frame of the boltingcloth.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. The combination, with an upper reciprocating frame suspended pivotally in the ma chine-body and having a bolting-cloth secured loosely thereto,of a second reciprocating frame suspended pivotally from the upper frame and having a wire screen secured thereto, and means, substantially as described, for imparting a greater degree of movement to the lower than to the upper frame, for the purpose set forth.

2. The combination, with the machine-casing and the bolting-frame supported longitudinally therein, of a suction-fan mounted upon saidcasing, a series of partitions converging toward the fan and forming intermediate airchamhers above the bolting-frame, and a perforated wall or diaphragm extending across the mouths of said air-chambers and composed of two sections, the upper one of which is adjustable upon the-lower one, substantially as and for the purpose set forth.

3. The combination, with the machine'casing and the.-bolting-frame supported longitudinally therein, of a suction-fan mounted upon said casing, a series of partitions converging toward the fan and forming intermediate airchambers above the bolting-frame, a door-valve located at the: exit of each airchamber contiguous to the fan, and a perforated wall or diaphragm extending across the mouths of said chambers and composed of two sections, the upper one of which is adjustable upon the lower one, substantially as and for the purpose described.

4:. The combination of the machine-casing constructed with the rear partition, the rear air-ch amber having adjustable perforated base and door "alve, the suction-fan, the slatted openings in rearof the partition,the frame carrying the bolting-cloth, the tailings-spout, and a series of steps having solidinclined portions and perforated risers,'said steps being interposed between the rear of the machine and the base of the rear air-chamber and ext-ending and connecting-rods between the driving-shaft and frames and j ournaled eccentrically to said shaft, the connecting-rod of the screen-frame being located between the connecting-rods of the bolting-cloth frame and having a larger eccentric than the latter, substantially as and for the purpose set forth.

7. Thecombination, with the conveyers and their boxes, of a longitudinal hopper located above said boxes and having ways or guides formed on its lower outer sides, a rod extending through the lower part of the hopper and carrying a series of angle-levers, and slides set movably in said guides and slotted or grooved on their inner sides to receive the ends of said angle-levers, substantially as and for the purpose described.

In testimony that we claim the foregoing we have hereunto set our hands, at Milwaukee, in

the county of Milwaukee and State of lrVisconsin, and at Lincoln, in the county of Logan and State ofIllinois, respectively, each in the presence of two witnesses.

GEORGE A. GILBERT. JOHN GORDON. Witnesses to signature of Gilbert:

H. G. UNDERwooD, N. E. OLIPHANT. Witnesses to signature of Gordon:

E. B. MALTBY, J. T. RUDOLPH.

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