US158025A - Improvement in middlings-purifiers - Google Patents

Description

3 Sheets--Sheet 2.

n'. HfuCKwALTER.

MddIings-Purifiers..

Patented Dec. 22,1874.

Uivrrnn STATES Param rrrcn.

HIMSELF AND FREDRICK LANGE, OF SAME PLACE.

IMPROVEMENT IN MIDDLlNGS-PURIFIERS.

Specification forming part of Letters Patent No. 158,025, dated Drcelnter 22,1874; application filed August 15, 1874.

To all whom it may concern:

Be it known that I, DANIEL H. BUCK- WALTER, of Chippewa Falls, in the county of Chippewa and State of Wisconsin, have invented an Improved Machine for Separating and Purifyin g'Wheat-Middlin gs, of which the following is a specification: y

In the manufacture of wheat flour it has been found by experiment that there is a perceutage of line flour that is lighter than the fine fuzz of the wheat which is liberated by grinding, but which is also heavier than the dust of the middlings.

The object of my invention is Vto combine in one machine certain devices which will separate the coarse from the line middlings, eliminating, at the same time, the impurities from them; second, to separate the fine our from the line middlings; and third, to separate the dust from the fine flour; and, it consists, rst, in the peculiar construction and manner of operating the bolting-reel, which has a longitudy inal vibration, as well as an intermittent rotation; also, in the peculiar construction and arrangement of the separating devices, as more fully hereinafter set forth.

Figure 1, Sheet l, is a perspective view. Fig. 2, Sheet 2, is a side elevation. Fig. 3 is a front elevation. Fig. 4 is a rear elevation. Fig'. 5, Sheet 8, is a longitudinal vertical section on x x, Fig. 4. Fig. 6 is a cross-section at y y in Fig. 5. Fig. 7 is a similar section at z z. Fig. 8 is a detail section of the reelgear. Fig. 9 is a similar detail of the reelshaft and central perforated tube. Fig. 10 is a plan of the same.

In the drawing, A represents the frame of the machine, surmounted by a hopper, B, through the throat of which a roller, C, is transversely journaled in bearings on top ot' the frame, and which, by its rotation, causes the middlings to feed into a spout, D, below, which is enlarged and` inclined to spread the middlings before discharging them. The bottom of the spout D is fitted with a coarse bolting-cloth, which effects the first separation, or rather prepares the middlings for the first separation. E is the reel-shaft, which is triangular in cross-section. The tail end rotates and slides in a socket in a vertically-adjustable bridge-tree, a, to adjust it to such inclination as the middlings may require. The upper end is sleeved through a triangular opening in the hub or bushing of a pinion, F, journaled in a mortise in a bridge-tree, (1t/,in the head part of the frame. rIhe reel-shaft is provided with arms b, Fig. 7, which carry the ribs c, covered with boltingcloth E2, which thus forms a triangular reel. A slotted sleeve, El, is concentric-ally sleeved on the shaft inside the bolting-reel. The head end of the shaft is round in cross-section, and is suspended in an eye at the lower end of a three-inch platespring, d, pendent from the top of the frame, which spring pulls the reel-shaft toward the head ofthe machine. A rod, e, is also secured to this spring and the shaking-spout I). G is the driving-shaft, journaled across the front or head end of the frame, carrying an eccentric, f, which is embraced by an open box, g,.sus pended by two plate springs, h, from the frame. In the rear plate of this box the end of the reel-shaft is `journaled, but bearing at its extremity upon the eccentric. My object in journaling the shaft in the suspended bearing is to take the friction off the hub of the pinion F. H is a suction-fau, driven by a belt from a pulley on one end of the drivingshaft. This fan and its vcase are located on top of the frame-work, which is cased in on the top. I is the suction-tuhe, communicating at one end with the fan, and then turned down over the tail end of the frame, turned in, and terminating in the lower end of the reel, above the shaft. J is a counter-shaft, journaled in the lower front part of the frame, and is driven by a belt from the driving-shaft. On its inner end is a bevel-pinion, K, meshing with a bevel-gear, K', on the front end of a conveyer-shaft, L, longitudinally journaled in the lower part of the frame, with a screw-conveyer, M, mounted upon it, and rotating within a trough, N, which may be provided with one or more valves, to discharge a portion of the material, for returning them either forregrinding or for repuritication, the rest being discharged at the tail end. O is a spur-gear on the conveyer-shaft, meshing with and giving e Memes motion to a large pinion, I), on a countershaft, j, above it, on which is also mounted a wheel, Q, having 'four teeth, t', on its periphery in one group, all the rest being cut o. These teeth t', in each revolution of the couliter-shai't, engage with the pinion F, sleeved on the reel-shaft, and rotate it one-third of a revolution, causing the reel-shaft to rotate from one tlat side to the next, upon which its tail end drops in its bearing with such impact as that the concussion will free the cloth from the adhering middlings, and thus obviate the necessity of brushing it for that purpose. Gver then reel is Vsuspended anfarched'casing, R, above which is a large opening, k, in the top casing, leading into the fan-case, and which opening is provided with one or more valves to regulate the upward current. EX- tending below the reel, nearly to the trough, N, are the sides It', suspended from the top casing of the machine. S isa blast-spout, attached to the mouth of the fan-case, and is curved upward, and extends along over the top oi' the machine, with a hopper, S1, over the hopper B, and another one, S2, at the eX- tremity beyond the machine, both these hoppers being provided with valves s s in their bottoms. In practice, the total length of the blast-spout is about twenty feet. The hopper S2 is covered at the top with a bolting-cloth, l, ot' very tine mesh, which is kept free by two cloth wipers, m, on a shaft, T, revolving in standards n at the sides, the said shaft 'I being driven by a belt from any convenient pulley on the machine. The fan is driven by a belt from the driving-pulley.

The first separation occurs when the iniddlings enter the reel by the suction of the fan, which draws into the suction-spout the liner and lighter portions which are blown up into the blast-spout s, reaching it through the spout or tube I'. rlhe heavier particles pass into the reel, which separates the coarse impurities, which are discharged at the tail end over an apron, U. What passes through the bolt is carried away by the conveyer, except the very iine particles ot' light liour, which, as

they are iioating or falling slowly down, are met by intluent currents of air entering bctween the conveyer-trough and the sides R', carried up by the suction over the arched casing R into the fan, and discharged into the blast-trunk. The heavier particles settle in the hopper S1, where the second separation occurs, while the lighter particles (fine flour) pass along to the end, where the fine cloth in the end hopper SZ permits the dust to escape, while it retains the iiour, l which, thus separated, can be drawn oft', from time to time, through the bottom valve s', the third separation occurring in the hopper S2.

The gearing is so proportioned as to give the reel four hundred vibrations per minute, and one revolution on its axis per minute, or three concussions per minute, which will keep the meshes of the bolt free from adhering particles.

The tail end of the machine is closed up, except an opening at the discharge-apron U, in order that the current ot' air to supply the spout I may be drawn from the head end et the reel. v

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

1. The triangular reel-shaft E, bolting-reel E2, and pinion F, in combination with eccentric fand gearing, for continuously reciprocating and intermittently rotating the bol'tin reel and reel-shaft, substantially as described.

2. The combination ot' the suction-fan H, suction-spout I, blastspout S, provided with the hoppers S1 S2, the valves s s', shaft T, wipers m, and cloth l, with the bolting-reel F2, shield It, sides R', and frame A, substantially as and for the purpose set forth.

3. rIhe partially-toothed gear Q and pinion F, arranged as described, for intermittently rotating the angular reel-shalt E, having a' longitudinal movement in said pinion, for the purpose set forth.

DANIEL H. BUGKWAIJTER. Witnesses:

EDWARD ALLEN, GEO. VJ. Loan.

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