US241252A - Middlings-purifier - Google Patents

Description

(No Model.) W. TUCKER.

Middlings Purifier. No. 241,252. Patented May 10,1881.

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Ihvrrnn STATES AIENT OFFICE.

IVILLIAM TUCKER, OF PARIS, ILLINOIS.

MlDDLlNGS-PURIFIER.

SPECIFICATION forming part of Letters Patent No. 241,252, dated May 10, 1881.

Application filed April 19, 1880. (X model.)

To all whom it may concern Be it known that I, WILLIAM TUCKER, of Paris, in the county of Edgar and State of Illinois, have invented a new and useful Improvement in Middlings-Purifiers, of which the fol lowing is a specification, reference being had to the accompanying drawings.

The invention relates to an improvement in middlings-purifiers; and it consists in the devices hereinafter described, and particularly pointed out in the claims.

The object of the invention is to produce an efficient and improved machine for purifying the intermediate product of ground wheat, termed middlings, by separating it from bran and flour. The purpose of the several parts of the invention will appear hereinafter.

Referring to the accompanying drawings, Figure 1 is a central vertical longitudinal section of a machine embodying the elements of the invention. Fig. 2 is a side view, and Fig. 3 a front view, of same.

A indicates the frame of the machine or apparatus, supplied with the usual hopper, (not shown,) for feeding the middlings, and a fan,

B, for creating a current of air, which assists in purifying the material.

In the frontportion of the machine the sieves D are mounted, three in the present instance being employed, the lowermost one extending nearly the whole length of the machine. The rear ends of the sieves D are connected, but allowed to move independently of each other, by the spring-bars a, one bar connecting the lower and upper sieves and another connecting the middle sieve, with the bar I), rigidly attached to the rookie g shaft (1, secured across the top of the apparatus, and the movement of which either elevates or lowers the end of the bar I), which, in turn, causes the spring bars a and the rear ends of the sieves D to be either elevated orlowered. One end of the shaft (1 is bent down over the side of the frame A, and is set into a slot, 6, in the plate f, which plate is adjustable longitudinally bymeans of the sloth and set-screw i. When the plate f is moved toward the front of the machine it rotates the shaft (1 toward the rear and lowers the bar 11, causing, also, the lowering of the rear ends of the sieves D. The purpose of raising and lowering the rear ends of the sieves D is to increase or diminish the capacity of the machine,

the capacity being greatest when the sieves are about on a horizontal plane and smallest when they have been inclined to their lowest point. Any intermediate position between these two extremes may be obtained by adjustin g the plate f with relation thereto and securing it by means of the set-screw t.

The sieves D consist of a rectangular frame supplied between its sides and ends with the screens Ir, which, in lieu of the bolting-cloth usually employed, are made of sheet-zinc perforated or provided with narrow slots. Below each sieve D is provided a floor, m, which inclines from the rear end of each sieve to the front end of the one just below it, in order that the material as it is shaken through one sieve may pass to the front end of the one next beneath it, and so on until it escapes at the bottom of the machine. The front ends of the sieves D are connected by the bars a, pivoted on stands 4', which are rigidly secured to the frame A at a point about midway between the sieves. The upper bars or connect the first and second sieves, being mounted on stands between them, and the lower bars the second and third series. Upon the front of the lower sieve D is secured a bar-spring, t, the ends of which ,pass under the guards to on the end of the frame A, and which, when the said sieve is thrust forward, serves as a means of forein g it back to its former position when the pressure against it is relieved.

In front of the middle sieve D is mounted in suitable bearings the shaft w, carrying a cam, 00, which acts upon a small sheave-wheel, 2, attached to the frame of the said middle sieve. When themiddle sieve D is forced rearward by the cam 00 it draws the ends of the bars a secured to it also rearward, and has the effect of throwing, consequently, the other ends of said bars and the upper and lower sieves forward. After the greatest point of eccentricity of the cam a: has passed the sheave-wheel z the middle sieve D is forced forward again by the action of the spring-bar t, and, if they are constructed so to act, the spring-bars a. This movement of the middle sieve D and the action of the bar-spring t and the bars a operate to drive the upper and lower sieves D rearward. During the entire operation of the machine these sieves have this alternating movement, and serve to counteract the action of each other and prevent the great jarring efl'ect upon the machine caused by all the sieves moving in the same direction.

Below the lower sieve D is provided a floor, H, the front portion of which inclines gradually downward toward thefront of the machine, while its rear portion is formed into a hoppershaped receptacle, I, having an outlet, K, for permitting the escape of the .material as it passes through the rear end of the sieve.

Upon the floor H is placed in suitable guides, L, the slide M, operable by means of the handle N. The purpose of the slide M is to direct, when pushed inward, the middlings as they fall through the rear end of the sieve to the front of the machine, where they may be returned to the uppermost sieve D by an endless elevator-belt or otherwise and again passed through the machine.

Where the quantity of middlings to be purifled is small it will be found desirable to employ the slide M, as when the middlings are returned and the machine kept full the sieves will do better work than when but a small amount of the material is in the machine.

It is obvious that I may use bolting-cloth or any suitable perforated material in lieu of the zinc screens is with satisfactory results.

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

1. The three sieves D, connected at their front ends by the bars a, pivoted upon the stands '2", in combination with the shaft w, having a cam, :10, operating on the middle sieve, substantially as specified.

2. The three screens D, connected at their front ends by the bars n, pivoted upon the stands 0', in combination with the spring t and shaft w, having a cam, :0, operating on the middle sieve, substantially as set forth.

In testimony that I claim the foregoing improvement in middhugs-purifiers, as above described, I have hereunto set my hand this 13th day of March, 1880.

\VILLIAM TUC KER.

Witnesses 0. W. LEVINGS, C. \V. HUBBARD.

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