US570600A - The nokris petebs-co - Google Patents

Description

2 Sheets-Sheet 1.

(No Model.)

E. KEITH. GRAIN SGOURER.

No. 570,000. Patented Nov. 3, 18-00.

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(No Model.) 2 She'ets-Sheef2.

E. KEITH. GRAIN SGOURER.

Patented Nov. 3, 189 6."

UNITED STATES PATENT OFFICE.

ELGIN KEITH, OF SILVER CREEK, NEV YORK, ASSIGNOR TO THE HOWES GRAIN CLEANER COMPANY, OF SAME PLACE.

GRA|N-SCOURER..

SPECIFICATION forming part of Letters Patent N 0. 570,600, dated November 3, 1896. Application filedJHllQ 25, 1896- Serial NO. 596,851- (NO 11106.81.)

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Be it known that I, ELGIN KEITH, a citizen of the United States, residing at Silver Creek, in the county of Chautauqua, in the State of New York, have invented a new and useful Improvement-in Grain-Scourers, of which the following is a specification.

This invention relates to that class of grain-scourers in which the scouring mechanism is combined with suction spouts through which the dust and other light impurities are drawn oft.

The object of my invention is to so organize the air and dust passages of the scouring mechanism that the apparatus is simple and compact and that the separated impurities are completely carried on.

The machine illustrated in the accompanying drawings and described in this specification is more especially designed for cleanin g and polishing malt, but my improvements are also applicable to grain-scourers used for other purposes.

In the accompanying drawings, consisting of two sheets, Figure l is a side elevation, partly in section, of my improved graincleaning machine. Fig. 2 is a horizontal section in line 2 2, Fig. 1. Fig. 3 is a verti-, cal transverse section in line 3 3, Fig. 1. Fig. 4: is a fragmentary vertical section taken in the same plane as Fig. 1 and showing the scouring mechanism on an enlarged scale.

Like letters of reference refer to like parts in the several figures.

A represents the main frame of the grain cleaner or separator; B, the shaking-shoe, which is provided with a number of inclined screens; 0, a vertical air-trunk opening with its lower end over the receiving end of the shaking-shoe; D, a chess-hopper connected with the upper end of the vertical air-trunk, and E the fan-case, having its eyes connected with the chess-hopper by air-trunks c, all of which parts may be of any suitable and wellknown construction.

F represents the casing of the scouring mechanism, which is arranged in front of the vertical air-trunk and which is provided in its upper portion with a feed-hopper f.

brush arranged horizontally below the outlet of the feed-hopper and extending transversely from one end of the scouringcase to the other. This brush is mounted on a shaft g, which extends through the end walls of the scouring-case and is turned so that its front side moves downwardly.

H represents a scouring-concave which incloses the front, rear, and lower sides of the scouring-drum and which consists of a sheet of flexible perforated metal. The curved edges of the concave rest loosely upon curved flanges or shoulders h, secured to the inner sides of the adjacent end walls of the scouring-case, and the rear end of the concave is bent into the form of a hook h. The latter engages with a transverse bar I, supported with its ends on the end walls of the scouring-case and separated by an intervening space from the adjacent inner wall of the scouring-case. The rear wall f of the hopper is arranged with its lower end about midway between the front and rear ends of the concave,whereby the grain is directed between the downwardly-moving front portion of the drum and the concave, and the grain is discharged by the upwardly-moving rear portion of the drum between the rear end of the concave and the rear wall of the hopper. The front end of the concave is arranged adjacent. to the lower end of the front wall of the hopper and is secured to the lower ends of two adj usting-rods J J, whereby the concave is adjusted toward or from the scouringdrum for regulating the scouring action. These rods are arranged in front of the front hopper-wall and are provided at their upper screw-threaded ends, which pass through openings in the top of the scouring-case, with screw-nuts j, bearing against the top of the scouring case. screw-nuts the concave is drawn closer to the drum, and upon loosening these nuts the concave is permitted to move away from the drum. This construction of a scouring-concave and the means for adjusting the same is extremely simple and is not liable to get out of order.-

Upon tightening the K represents a grain'spout whereby the scouring-concave were again mixed with the grain as it escapes from the concave is delivered into the vertical air-trunk.

L represents a dust-chamber which is arranged in the scouring-case below the scouring-concave and which receives the fine impurities which are detached from the grain by the scouring-drum and pass through the perforations in the scouring-concave. The bottom of the dust-chamber consists of two boards m, which incline from the central portion of the chamber in opposite directions to ward the end walls thereof.

N represents a vertical air inlet pipe which opens with its upper end into the dust-chamber between the inner or elevated ends of the bottom sections and which is provided in its lower end with a slide-valve 01, whereby the admission of air may be regulated. Each end of the dust-chamber is connected with the suction of the fan by a pipe 0, which opens with its receiving end through one of the end' walls of the dust-chamber just above the base of one of the inclined bottom sections and with its delivery end into one of the airtrunks e. The current of air which enters the dust-chamber through the central inlet carries the dust which falls into the dustchamber toward opposite ends of the latter and from thence through the air-pipes 0 to the fan. By inclining the bottom sections of the dust-chamber from the inner toward the outer ends the dust is prevented from settling thereon.

In grain-cleaning machines of this character as heretofore constructed the particles of dirt and dust which were detached from the grain and passed through the perforated grain, making it necessary to again separate the dirt by the air-separator.

In my improved separatingmachine the detached dust as it passes through the scourin g-concave is carried directly to the fan without being again mixed with the grain, thereby increasing the capacity of the machine and improving the quality of the work.

I claim as my invention- 1. The combination with a perforated scouring-shell, a fan and an air-trunk connecting the grain-outlet of said shell with the fan, of a dust-chamber arranged below said scouringshell and having its bottom inclined,said dustchamber having an air-inlet at the upper end of said inclined bottom and a dust-outlet at the lower end thereof, and a separate airspout extending from said dust-outlet to said fan, substantially as set forth.

2. The combination with a perforated scou ring-shell, a fan, and an air-trunk connecting the grain-outlet of said shell with the fan, of a d ust-chamber arranged below said scouringshell and having its bottom inclined from the middle of said shell toward both ends thereof, said dust-chamber having an air-inlet at the raised middle portion of its bottom and dust-outletsat the lower ends of said bottom, and air-spouts extending from said dust-outlets to said fan, substantially as set forth.

Vitness my hand this 18th day of June, 1896.

ELGIN KEITH.

IVitnesses:

LEON II. BRAND, C. W. GRASHO.

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