US151081A - Improvement in middlings-purifiers - Google Patents

Description

, 2Shets--Sheeth R. R. BRYSN @L S. C. MGMASTEB.

Midd`lings Purifiers.'

Patented. May 19. 15374.

No.l5l,08l.

2 Sheets--Shelt 2.

R. R. BRYSDN @1.4 S. C. MGMASTEB.

Mi'ddlrings Puriers. Patented May 1 9, 1874.

'rauen'.

ROBERT R. B RYSON, OF TARENTUM, AND SAMUEL O. MCMASTER, OF

SEWIOKLEY, PENNSYLVANIA.

IMPRVEMNT iN MIDDLINGSPURIFIERS.

Specification forming part of Letters Patent No. ELOL dated May 19, 1374; application filed 4 February l0, 1&74.f

To all whom t may concern:

Be it known that we, ROBERT lt. BnvsoN, of Tarentuin, and SAMUEL G. McMAsrER, of Sewiclrley, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Machine for Purifying Middlings; and we do hereby declare the following to be aV full, clear, and exact description thereof, reference beinghad to the accompanying drawing forming a part of this specification, in which- Figure 1 is a perspective view of our improved machine, and Fig. 2 is a longitudinal vertical section of the same.

Our invention consists of certain improvements in machines for purifying middlings.

To enable others skilled in the art to make and use our invention,we will describe its construction and mode of operation.

The middlings are supplied through the spout a. At the lower end of this spout, so as to receive its contents, is an inclined board, b, having a series of cleats upon its face, which are designed for the purpose of distributing and spreading middlin gs. The middlings, passing over the board b, are deposited on a board, c, at the end of the sieve d, such board having a vibrating shake motion with the sieve. At the rear end of the board c is y along narrow slot or opening, which leads down to the sieve d, and is designed to deliver themiddlings thereon in-a thin stream sol that they shall be thoroughly exposed to the action of a suctionblast, the spout e of -which opens at that point before they fall upon the sieve. The sieve d runs the full length of the machine, and is slightly inclined through its entire length. The bottom of this sieve is covered with bolting-cloth, as at all. This bolting-cloth is placed upon frames, so as to form sections, as indicated at d2, which sections continue throughout the 'whole length ofthe sieve. The object of the section is that the cloth may be taken out to be renewed, or so that finer or coarser cloth may be inserted for bolting corresponding material. J ust in front of the inner end of the board c is a blast-spout, e, which, leading up, passes back to the fan el, and is furnished with a discharge-opening, e2. The object of this blast is to draw up and carry the lighter impurities and particles from the middlings as they fall over the edge of the board c in a thin and distributed stream. The balance of the middlingsv falls upon the inclined sieve d. A shaking' movement is communicated to the sieve d by means of the ratchetwheel cl3, situated at one end of the machine, and by the spring d4, which operates against a lug on the side of the sieve. The ratchetwheel, by its inclines, forces the sieve d back, so as to force the lug at its side against the spring d4 and compress it. As soon as the ratchet has passed the engaging end of the sieve the springthrows it forward onto the next ratchet. At the rear'end of the machine, just above the opening d5, is a blast-spout, f, which leads up and along the top of the machine to a fan, f1, which has a discharge, f2, and is similar in construction to the blast-spout and fan e. In each of these blast-spouts, arranged between the suction-opening and the fan, are two valves, g and g1, the rst of which, g, serves to regulate the blast, but the second, g1, is intended to separate the heavier from the lighter particles. For instance, if the balance of material passing over is light, the valve g1 will be made tohang nearly vertically, so as to give a vertical surface against which the material will impinge; while if much heavy material is in the blast, then the valve will be made to present a more inclined surface for the material to iinpinge upon. lhus the valve g1 may be called a separator. Vhe'n opened, these fans deflect the impurities from the middlin gs in their course through the spouts, and cause the heavier particles to be cast downward, while the lighter ones, by the strength of the blast passing around the lower end of the valves, ascend and pass out the dischargeopenings f2 and e2.` Theheavierportions, being deflected in their course by the valves, are cast down into the pockets f3 and e3, each of which is fitted with a suitable door, f4 and e4, through which these heavier portions may be drawn off. By these means we are enabled to catch and save a valuable portion which heretofore has been blown directly out and lost. The blast-spout j' operates at the rear end of the machine and of the sieve d in precisely the same manner as the blast-spout e operates at the forward end, except that it has greater power. The iirst blast, operating as it does on the valuable material, is necessarily weak, to prevent its carrying olf the valuable mateits escape.

rial. The greater part of this is bolted through the cloth before the second blast is reached, which, operating on the coarser and heavier residuum, is of greatly-increased power. Extending along the full length of the machine underneath the sieve el is a spout, h, having inclined sides, and in this spout is a spiral screw or conveyer. This conveyer is designed to work forward the material which falls through the sieve d to the dischargeopening h1, whence it is drawn by means of 4a suitable spout or conductor. This portion of the middlings is purified, and needs no further operation. At the rear end of the eonveyer 7c the screw thread is reversed in, its direction, so that, while the conveyer is turning to feed forward, the last turn k1 of the screw feeds backward. The reasonfor this is that the unpuritied middlings which pass .through the opening d5, falling into the trough h, must be passed on through the next sieve and not mixed with the finished middlings in the trough h.. Just under the opening d5 is an opening, h2, by which the middlings still uupuriiied are permitted to fall on the second sieve c'. This sieve is similar in construction to the sieve d. It inclines slightly/from the rear end of the machine forward and has a shaking motion communicated by similar devices, such as the ratchet-wheel il and spring t2, as those which communicate a similar motion to the sieve d. At the front end of the sieve i there is an opening, i4, through which such middlings as pass forward the whole length of the sieve shall fall. Under the sieve there is a trough, l, having inclined sides similar to the trough h, which is provided with a conveyer, fm, similar to the conveyer L. In the bottom of the trough l there are a series of slides, closing openings, as indicated at a. The middlings which go through the sievei fall into the trough Z and are carried along by the conveyer and discharged through any of the openings m, the slides n1 being opened for The refuse, or that portion which does not pass the sieve, passes forward and out through the opening 4 and falls down into the trough Z, and thence through the opening n, at the forward end of such trough, the slide a2, which closes the same having been opened to permit its escape. The contents of the trough lfall into a second trough, o, just beneath, the latter being provided with a screw-conveyer, p, similar to that in the trough l, but having its screw running in the opposite direction, so as to carry the stuil' forward to the front end of the machine, the coarser and refuse matter which goes through the hole i* and the rst hole nl passing out of the first hole o1 and into a proper receptacle. The purified middlings which passed l[he last sievez pass out through the holes o2 into a second receptacle. Mounted upon rollers u, which are driven by power by means of a belt and band-wheel, are the belts uf, which carry brushes w made of sheep-skin with the wool still upon them. The function of these brushes is to clean the screen over which they pass. It will be noticed that they are arranged over and so as to operate upon each sieve d and l by a steady rubbing pressure. These brushes being made of the soft, close, untanned sheep-skin, and operating by a steady, rm rubbing pressure, are very superior andfdecidedly preferable to the brushes formed of bristles, the tendency of the latter being to wear out the bolting-cloths and to raise the dust without removing it. In our machine the dust is taken up by the brushes.

Power is applied to this machine by means of the belt w, which operates'the shaft w', from which a belt, l, extends to the wheels 2, and operates, by means of the shaft 3 and ratchetwheel il, the sieve i. A band from the other end of the shaft w extends to the wheel 4, which operates the shaft 5. This shaft, by means of its ratchet d3, operates the sieve d. A band, 6, from the shaft 5 to the wheel 7, operates the conveyer m, which, at its opposite end, by means of the spur-wheels 8, operates the conveyer o, and, by means of the band 9 and' wheel l0, the conveyer 7L. A band, 1l, from the shaft 5 to the wheel 12, operates the bolting-cloth brushes of the sieve d. A band, 13, from the shaft 3 to the wheel 14, operates the brushes of the bolting-cloth of the sieve t'. The fans, being mounted upon the shaft w', are operated thereby.

It is evident that other known means and ways of applying power may be used, and hence this may be regulated bythe wish of the builder and the size and position of the machine.

We are aware that brushes are usually employed beneath the sieve for cleaning the same. This we do not claim. The object of our brush, which is located above and works upon the middlings passing over the sieve, is to remove -all fuzz or fibrous substance which works through the cloth and obstrncts the sieve, causing said material to move over the sieve at the same rate as the middlings.

What we claim as our invention, and desire to secure by Letters Patent, is-

l. The combination of the suction-fans and blast-spouts e f and reciprocating sieve, arranged with each other to operate on the material as it is fed to the sieve, and upon the residuum passing over the tail end of the'sieve, substantially as described.

2. In a middlingspnrier, the combination, with the reciprocating sieve, of a brush arranged to traverse over the upper surface thereof for removing the fuzz or other fibrous substances, substantially in the manner described.

In testimony whereot we, the said ROBERT R. BRYsoN and SAMUEL C. McMAsTER, have hereunto set our hands.

ROBERT It. BRYSON. SAMUEL C. MGMASTER.

Witnesses J AMEs I. KAY, T. B. KERR.

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