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Publication numberUS135571 A
Publication typeGrant
Publication dateFeb 4, 1873
Publication numberUS 135571 A, US 135571A, US-A-135571, US135571 A, US135571A
InventorsChakles E. Mcneal
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Improvement in middlings-purifiers
US 135571 A
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Description  (OCR text may contain errors)


Middlings Purifiers.

NO. 135,571. K Patented Feb. 4,1873..





Specification forming part of Letters Patent No. 135,571, dated February 4, 1873" To all whom it may concern:

Be it known that I, CHAS. E. MGXEAL, of Silver Creek,in the county of Chautauqua and State of New York, have invented a new and valuable Improvement in l\liddlings-Separa-- tors; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing making a part of this spe fification, and to the letters and figures of reference marked thereon.

Figure lot the drawing is a representation of asection view of my machine. Fig. 2 is a sectional view of my discharge-spout.

This invention has relation to certain improvements. in middlings-sepzuators; and it consists in the employment,in connection with an air-chamber, wherein the currents are created among the particles of middlings, bran, and dust, of the force and suction fans acting in conjunction with each other; in the construction of the angular air-chamber and its double air-inlets or discharging-openin gs separated from each other by a prismatic partition; in the arrangement of the upper dustflue in connection with the fans and air-chamber; and, finally, in the general construction and novel arrangement of the middlings-separatin g machine, including all those parts which are essential to its successful operation, as hereinafter more fully described.

In the accompanying drawing, the letter A indicates the hopper, into which the. middlings are fed, passing into the small fan B, which operates to thoroughly whip and disintegrate the particles, and to throw them out into the large air-chamber H. By this means an aircurrent is created from the fan B out into the chamber H, and the heavier particles of the lniddlings are thrown ahead of the light dust and bran outward and somewhat downward into this air-chamber. For the purpose of directing the middlings to any part of the chamber H an adjustable cant-board, (l, is usually employed. 1) indicates anair-tube or leg above the main air-chamber, having a. large entrance openingjustin front ot'the small fan B through the upper wall of the chamber H, and connected at its other end with the case of the large suction-fan. Into this leg or tube the lighter particles are drawn as theyeddy under its on- ,tranceiu the large chamber H directly after being thrown from the small fan B, and are conducted directly to the large fan entering the case at its top. A valve, E, may beemployed for the purpose of regulating thedraft through this leg. F represents the large suction-fan situated at the opposite end of the air-chamber H, and operating to draw air into this chamber through the discharge-openings I I, thus effecting two distinct separations as the middlings fall through said openin gs. It also serves to draw through the chamber Hthe air thrown into it by the fan B, giving an upward tendency to'this current, and

favoringthe rise of the dust and light particles. It creates a draft through the leg I), and, tinally, it draws all the air entering the chamber ll, together with all the dustand lighter particles. into itself, and discharges the same through the spoutZ. Gindicates a slide-valve for the purpose of letting air into the top of the fan F, and thereby regulating the draft through the air-chamber H. The large airchamber H is pr ferably constructed in triangular form, its apex being downward. At this point the discharge-openingsIIare made, said openings being separated from each other by a prismatic partition, J, having an angular edge upward and its lower side horizontal. This air-chamber receives the currents from these openingsand from the hopper-fan B, and serves to keep the middlings confined in space while being acted upon by said currents.

It is observed that the widest portion of this chamber is near its top, or in the direction of the current from the small fan B. Space is thus given for the heavy particles of the mid dlings to be thrown as far forward as is coir sistent with the power of the small fan, thereby spreading said particles widely in the horizontal direction, and enabling the currents,

through the leg D and toward the opening M of the suction-fan, to separate more effectually the lighter particles.

The partition J between the openings I I serves to separate the two currents of air entering through said openings, keeping them for a certain space at a distance apart, thereby distributing the upward currents more widely through the chamber, so as to lift or buoy the dust and lighter particles as much aspossible.

K represents the driving-pulley. L L indicate the pulleys, by means of which the coumotion is made between the shafts T T. Nis the eccentric for operating the sieve P through the pitman S. Z represents the dischargingspout ot' the suction-fan, through which the dust and light particles are conveyed away. This spout is providedrwith angular receptacles R It, open at the bottom, into which the heavier particles of the separation will fail,indicating the strength or character of the separation.

What I claim as my invention, and desire to secure by Letters Patent, ist 1. The combination, with the air-chamber H. of the force-fan B arranged at one end thereof to throw the middlings into said chamber, and of the suctioi'i-f'an F arranged'at the opposite end of the chamber, substantially as specified.

2. The triangular air-chamber H having its apex downward and open for the admission of 4. The chamber H having the double air-e openings I I separated by the prismatic partition J having its horizontal side downward, substantially as spec fied.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.


W'itn esses:


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4853112 *Jul 25, 1988Aug 1, 1989Victor BrownLow velocity air classifier
Cooperative ClassificationB07B7/01