US696577A - Grain-scourer. - Google Patents

Description

No. 696,577. Patented Apr. I, |902.

' W. LEE.

GRAIN SCOURER.

(Application filed Sept. 1.1,'1901.)

(No Modem wif@ UrviTnn STaTies PATTLNT Trice.

lVORTIlY LEE, OF BLUEHILL, NEBRASKA.

eaaiascoussa.-

SEEGEFIGATION forming part oi' Letters latent No. 696,577, dated April l, 19021.

Application lcd September l1, 1901. Serial No. 75.030. (No model.)

.To @ZZ whom, t nto/y concern:

Be it known that l, WORTHY LEE, a citizen of the United States, residing at Bluehill, in the county of Webster and State oi Nebraska, have invented new and useful Improvements in Grain-Scourers, of which the following is a specication.

This invention relates to a grain-scouring machine of that type in which pairs of coperatiug rotary and stationary rubbing devices or disks are arranged in a perforated cylinder and act successively on the grain for removingtheimpuritiesand polishingthe grain.

The object of my invention is to produce a machine of this general character, but having rubbing devices of a novel construction, especially adapting the machine for detaching and removing without injury to the grain the outermost layer or portion of the bran, which is known as bees wing.7 rlhis outer portion of the bran Vis very thin and brittle and becomes finely pulverized in reducing the grain, producing tine particles or specks which it is very difficult to separate from the iour.

In the accompanying drawings, Figure l is a longitudinal sectional elevation of a grainscouring machine embodying my invention. Fig. 2 is a cross-section in line 2 2, Fig. l, looking forward. Fig. is a cross-section in line 3 3, Fig. l, looking rearward. Fig. t is a cross-section in line 2 2, Fig. l, looking rearward. Fig. 5 is a cross-section inline 5 5, Fig. l, looking rearward. Fig. G is a horizontal sectional elevation showing a slightly-modiiied construction of the machine.

Like letters of reference refer lo like parts in the several iigures.

A represents the perforated scouring case or cylinder, which is arranged horizontally and provided at its front end with a feedspout cy and at its rear end with a dischargespout l).

C represents the stationary rubbing partitions or disks', and D the coacting rotary rubbing and propelling devices, of which there is one arranged in front ot each stationary partition or disk.

E represents the horizontal shaft which carries the rotary scouring and propelling devices and which is journal'ed in bearings ff on the main frame F and is driven by a pulley f2 or other suitable means.

A suitable number of pairs of stationary and rotary scouring devices is arranged in the cylinder, one pair behind the other, as the character of the work or the nature of the grain may require. The stationary partitions or disks have concave faces c, which are turned toward the head of the cylinder, and the rotary devices D have corresponding convex faces, which are turned rearwardly toward the concave faces ot the stationary partitions. Each of the latter is provided with a comparatively small central dischargeopening c', through which the shaft E passes and which is somewhat larger than the shaft. The front stationary partition or disk is located near the feed end of the cylinder, and the last is preferably so arranged that its central opening discharges directly into the discharge-spout b.

Each rotary scouring and propelling device is composed of an annular series of radial wings or blades g, which are secured obliquely to a hub g, mounted on the shaft E. Each wing has a convex rear edge g2 of about the same curvature as the concave 'face of the scouring bowl or partition and projects with its rear portion into the concave face. The face or front side g3 of each wing, which side faces the direction in which the wing rotates, is preferably concave, and the front edge g4 of each wing is preferably straight.

H indicates intermediate propellers or conveyers, one ot' which is secured on the shaft E between each stationary bowl or disk C and the next rotary scouring and propelling de-v v ice D. These propellers have radial inclined wings, such as shown, and move the grain from the rear of each stationary disk toward the next rotary scouring device, so as to bc acted upon by the latter.

The wings or blades g of the rotary scouring and propelling device are separated from each other, so that ow passages or spaces are formed between the wings, which passages or spaces extend from the front to the rear edges of the wings. The grain is forced bythe action of the wings through these passages or spaces and is crowded into the scouring-bowl and swept around in the latter until the grain is iinally forced through the central outlet of the bowl. These outlets are so small coinpared with the diameter of the bowl that a IOO considerable pressure is created upon the grain in forcing the latter toward and through each outlet, such pressure causing an effective attrition action ot the kernels against each other. Wvhen the grain requires a more severe rubbing action in order to completely remove the outer layer of the bran, the convex face of the stationary disk or partition is milled or roughened, as indicated in Fig. 6; but this is not ordinarily necessary.

In the operation of the machine the cylinder is kept filled with grain, as the discharge of the grain from the several partitions takes place by reason of the pressure which is exerted upon the accumulated grain. The rotary wings sweep the grain around and at the same time exert a powerful pressure upon the grain, by which the latter is forced against the stationary partitionsand through the central discharge-openings thereof. This pressure causes an attrition action between the kernels and also a rolling action as the grain is swept around, whereby the outermost layer ofthe bran is Worked oft. treatment the kernels are not only freed from impurities, but also deprived of the thin outcrmostlayerot the bran, usually called bees wing. This outermost layer is very thin and brittle and in reducing the grain produces fine specks, which lower the grade ofthe tiou r and are very diiiicult to separate from the Aflour or Hour-producing parts of the grain by the usual treatment.

In operating upon certain kinds of grain the intermediate propellers or conveyers I-I can be omitted and the stationary bowls or partitions arranged more closely together, so that the grain passes directly from one partition to the rotary propelling and scouring device D ot' the next partition. This construction ot' the machine is shown in Fig. 6.

The fine detached material escapes thro ugh the perforations of the scouring-case and is collected or disposed of in any suitable and Well-known manner. terial which escapes with the grain into the tail-spout b is separated from the grain in any suitable manner-for instance, by an air- As the result ofthe The tine detached maseparator, such as is shown in the drawings, and Which consists of a wind-trunk J, into which the material is discharged from the tail-spout and Which leads to the eye of a fancase K. This Wind-trunk is provided With the usual chess-hopper or trapj` for intercepting the heavier grade of material which is carried off by the air current.

I claim as my invention- 1. The combination of a horizontal scouring-case, a stationary partition arranged therein and having a concave face and a central discharge-opening, and a rotary scouring and propelling device which projects into the concave face of the partition and which is composed of an annular series of radial, inclined wings Which face with their rear edges the concave face of the partition and which are separated by How-passages extending between the Wings from the front edges to the rear edges thereof, substantially as set forth.

2. The combination of a scouringcase, of a stationary partition arranged therein and having a central discharge-opening and a concave face, a rotary scouring and propelling device projecting into the concave face of said partition and provided with an annular series of radial inclined Wings having the edges facing the partition ot' substantially the same curvature as the concave face of the same, substantially as set forth.

3./ The combination with a scouring-case, of successive pairs of stationary partitions and coacting rotary scouring and propelling devices, said stationary partitions having concav'e faces and central discharge-openings, and said rotary scouring and propelling devices having inclined wings, and a propeller arranged between each partition and the nextfollowing rotary scouring and propellingdevice, substantially as set forth.

Witness my hand this 19th day of August, 1901.

VVORTHY LEE.

NVitnesses:

WM. A. GARRisoN, A. Snnosnnnn.

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