USRE5970E - Improvements in middlings-separators - Google Patents

Description

2 Sheets- Sheet 2. B. BRENNAN & W. TUCKER.

Middlings Separatnrs.Y

Reissued July 14,1874.--

F I G 3 I N YE NTO R- my as. 55mm..

W I T N E SS ES'.

UNITED STATES PATENT OEEICEr JOIINI. BRENNAN AND WILLIAM TUCKER, OF IARIS, ILLINOIS.

IMPRCVEMENTS lN MIDDLINGS-SEPARATORS.

Specication forming part of Letters Patent No. 120,706, dated November 7, 1871; reissue No. 5,970, dated v July 14, 1874; application iiled June 22, 1874.

To allwhom it Imay concern Be it known that we, JoIIN B. BRENNAN and WILLIAM TUCKER, both of Paris, in the county of Edgar and State of Illinois, have made and invented certain new and useful Iniiprovements in Middlings Separators, of which the following is a specification:

Our invention relates to that class of machines which is used for the purpose of separating middlings or the coarser parts of iiour, and consists of certain improvements in the details of construction of the same hereinafter shown and described.

In the accompanying drawings, Figure l is a perspective view; Fig. 2, is a longitudinal vertical section; Fig. 3, is a rear elevation.

The construction, operation, and relative arrangement of the component parts of our invention are as follows: In the front of the machine is the suctionfan A, so arranged as to draw the air from the rear, 'immediately back of which is the slide-valve B, by means of which the draft is regulated. In the rear of themachine are arranged the sieves (l D E, in the present instance three in number, within the frame F, which is connected by means of the connecting-rod II with an eccentric upon the transverse shaft I, the rotation of which causes the frame containing the sieves to reciprocate upon the springs K. The said sieves are inclined downward, toward the fan A, and formed partly of solid pieces L and partly of bolting-cloth or perforated material M, so that after the middlings pass through one sieve they are carried back by the inclined pieces N in such a manner as to pass through the others until they reach the hopper under the frame, from whence they pass out of the machine. The object of forming part of thelsaid sieves or screens of solid pieces is'to allow the bran or light stu to shake to the top after falling and pass down the incline more rapidly than the heavier portion, so that when it comes to the part that is perforated, where there is a current of air drawn by the fan, it is taken up and carried over the end of the sieve, while the heavy middlings pass to the lnext sieve below.

It is to be observed that by so constructing the machine that the air is drawn through the parts lVI from below a very eective agitation of the material being acted upon is accomplished. And to insure this important result the suction-fan A, and other parts, are so constructed that the air is necessarily drawn through the parts M, no other way of esca-pe toward the fan being provided.

Under each sieve or screen aforesaid, in the present instance hinged to the frame thereof, are the valves O, which are arranged so that they may be adjusted at will so as to regulate the drafts upon the several sieves or screens according to the quantity of material that is being separated, and other circumstances. Usually the top screen will require less draft than the middle or lower ones, in which event the top valve will be carried up so as to direct the air toward the solid part of the screen, while the lower .valves will be opened to a greater or less degree to permit of a stron ger current.

In Fig. 2 'the valves O are shown with sufii cient particularity to explain their offices, the direction of the currents of air being shown by the arrows. A

On the top of the machine is the upper sieve, l?, which is attached to the lower frame by the springs It, and operated by means of the connecting-rod, to which vibratory motion is im parted by the shaft. rI he bran and middlings are fed in at the upper end ofthe sieve I?, and

as they pass downward the fine middlings fall through the fine screen S upon the bottom T, and are carried down to the lower end thereof where they are discharged through a spout and carried off. while the coarse middlings and bran pass down to the coarse screen U, fall on the carrier-board V, and are fed into Athe hopper W on the topl of the machine,

where they drop upon the sieve or screen C, above described.

Having thus set forth our invention, what We eleim as new and nsefnl, and desire to se-y perforated parts M and L, substantially as and eure by Letters Patent, is-

1. In amiddlings-separator, the combination of one or more sieves having the perforated and unperfomted parts M and L, valve or valves O, and suction-fam A, when constructedA and arranged to operate snbsbentielly in the nin-nner and for the purposes specified.

2. The combination of the sieve P, frame F, valves O, inclined chutes N, and sieves C D E, constructed with the perforated and unfor the purpose described.

AJOHN B. BRENNAN. WILLIAM TUCKER.

Witnesses as to JOHN B. BRENNAN: ROWLAND COX,

DENNIS TINNEY. Witnesses as to WILLIAM TUCKER:

WM. B. SHERIFF, HARRY BOOTH.

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