US145906A - Improvement in middlings-purifiers - Google Patents

Description

3 Sheet-s--Sheet 1., I. SCHOLFIELD.

Middlings-Puriers. No, 145,906, Patented Dec.23,1873.

SSheetsu'SheetZ. l. scHuLrlELu Middlings-Puringlrs.

N0. 145,906, Patented Dec.23,1873.

- 3Sheets-Sheet3.

I. SCHULFIELD.

Middlings-Purifers.

N0. 145,906, Patented Dec. 23,1873.

UNITED STATES PATENT OFFICEo ISSAOHAR SOHOLFIELD, OF DUNLAP, ASSIGNOR OF ONEHALF HIS RIGHT TO BENJAMIN F. FREDRICK, OF MARSHALL COUNTY, IOIVA.

IMPROVEMENT IN MIDDLINGS-PURIFIERS.

Specification forming part of Letters Patent No. l45,906,`dated December 23,1873 application filed August 16, 1873.

To all whom fit may concern:

Be it known that I, IssAoHAR ScrroLrrnLn, of Dunlap, in the county of Harrison and State of Iowa, have invented certain new and useful Improvements in Middlings-Puriers; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon.

My invention relates to that class of machines used for purifying middlings; and it consists in the con struction and novel arrangement of parts, as will be hereinafter more fully set forth.

In order to enable others skilled in the art to which my invention appertains to make and use the same,I will now proceed to describe its construction and operation, referring to the annexed drawings which form a part of this specification, and in which- Figure lis a longitudinal vertical section,

Fig. 2 a side elevation, and Fig. 3 a plan view,

of my machine.

A represents the frame, which is constructed in any suitable manner to contain the various working parts of my machine. B represents the hopper, in the bottom of which is a longitudinally-tinted or corrugated revolving roller, C. Attached to the hopper B is a feed-board, D, adjusted by means of setscrews a, to regulate the feed.

H H, and containing or carrying a gang of sieves, G G. This frame'E, with its sieves, is vibrated back and forth by means of a pitman, I, one end of which is attached to a crank-shaft, J and the other end to a crossbar in the top of the frame. At each backward motion the frame E strikes a bumper, b, formed of a set-screw, which may be adjusted so as to make the blow great or small, as desired. At suitable points through the sieves G G pass bolts d. These bolts pass through pieces of leather e c glued to each side of each sieve, and through blocks ff, placed between the sieves, and are firmly secured by burs on the lower ends under the sieves. 'On the head of each bolt d strikes a hammer, K, which is pivoted at X, as shown E representsva frame or shoe supported upon steel springs strike projections on the rear ends of the hammers, raising their front ends up, and, as soon as the pins have cleared said projections, the hammers fall down on the heads of the bolts d d. m is a setscrew attached to the side of the frame E, and passing through the tail-board a to raise and lower the sieves at will. Under the sieve-frame E is a hoppershaped receptacle, M, with a conductor, O, at the bottom. Immediately back of this and under the tail-board n is a passage, N, with a conductor, O1, at the bottom. At the back end of the machine is a chimney, P, with conductor O2 at the bottom. The conductor O1 connects with an elevator, It, at the side of the machine, and at the top of this elevator is a spout, p, leading into the hopper B. The chimney P is for the purpose of carrying off dust, &c. At the front part of the machine is the fan-case S, containing the fan T, and the air is forced by said fan through an upwardly-inclined passage, V, to and under the sieves. At each end of the fan caseor drum S isa slide', s, to regulate the draft.

The operation of the machine is as follows: The middlings are fed into the hopper B and carried over by the uted roller C, falling onto the gang of sieves G, the pure middlings passing through the sieves into the conveyer O. The impurities are carried over and off the tail-board n and fall into the conveyer O2, while the returns, or that part of the middlings that may pass over the sieve under the tail-board, fall through the passage N into the conveyer O1, and are returned by the elevator R into the hopper to be cleaned over.

The separation is effected in the following manner: The pressure of air by the fan T, under and through the gang of sieves G,holds up and forces back the light and impure particles from passing through, and which are carried off over the tail-board a, while the pure middlings, being heavier, pass through the sieves into the conveyer O. The separation is also assisted by the vibration of the sieves by the pitmen I, by the hammers K In j striking the hea 's of the bolts d in the sievecioth, (freeing the cloth from any particles that may adhere to it and prevent them from cloggingg) also by the bumper d, which causes a sudden jar to the sieves 011 their backward motion, thus most perfectly separating` and carrying oft' all the impurities.

The Various parts of this machine are revolved by means of belts and pulle5 s, arran gc d in any suitable manner.

I claim-'- l. The combinatiomwith the sieves G and hammers K, operated as described, of the fan T, receptacle M, passage N, and chimney P, with their respective conductors O O1 O2, the

elevator R, and spout I), arranged in a relative'position to each other, substantially as shown and described.

2. In a middlingspurier, sieves G, having,` pieces of leather e glued to each side of each sieve-cloth, and blocks f placed between said leather and sieves and firmly secured bymeans of bolts Z passing through said parts, in combination With hammers K, as and for the purpose mentioned.

ISSACHAR SGHOLFIELD.

Vitnesses G. N. THOMPSON, E. G. PERKINs.

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