USRE6619E - Improvement in flour-bolts - Google Patents

Description

G. T. 81 A. SMITH.

Flour-Bolt.

Reissued Aug. 24

UNITED STATES PATENT OFFICE.

GEORGE '1. SMITH, OF MINNESOTA GITY, AND AARON SMITH, OF

HASTINGS, MINNESOTA.

IMPROVEMENT n FLOUR-BOLTS.

Specification forming part of Letters Patent No. 135,496, dated February 4, 1873 reissue No. 6,198, dated December 29, 1 874; reissue No. 6.619, dated August 24,1875; application filedApril I, 1:5?5.

To all whom it may concern:

Be it known that we, GEORGE T. SMITH, of Minnesota Oity, Minnesota, and AARON SMITH, of Hastings, Minnesota, have invented a Flour-Dressing Machine, of which the following is a specification:

In the drawings, Figure 1 is a vertical transverse section, showing spouts attached to the air-chamber or bolting-case, and adapted to receive material through openings in said airchamber. Fig. 2 is a vertical longitudinal section.

A is the frame-work and easing. Inside this casing is a bolting-case, B, closed, except as hereinafter mentioned, at the top, sides, and ends, and having a bolting-cloth, (1, across the bottom. The case rests upon, and is oscillated on, shaft 1) by means of pitman c and crankwheel 12. The bolting-case or air-chamber is divided by transverse partitions into three sections, E F G, each having an adjustable opening, 0, at the top into the air-trunk 11. This trunk passes over the top of the air-chamher, and down its rear end until it meets and opens into a tube, a, which passes through case A into the suction-fan J In each section of the air-chamber is an inclined shelf, f, forming, with the front end of the air-chamber and the transverse partitions, pockets, for a purpose which will be explained. g g g are openin gs through the side of the air-chamber into spouts h. Each of these openings is provided with a sliding gate, 0', having a cord, 70, the

upper end of the cord being attached to the top of case A. Each spout has, at the bottom, a gate, m, with a cord, k, connecting it with the gather-boards, and a retracting-spring. s s s are brushes, arranged below the boltingcloth, against which they are supported by means of belts 'r 1'. The ends of the belts are attached to the outer case. The central portions, which carry the brushes while they (the brushes) are traversing the bolting-cloth, pass over guide-rollers 1", which serve to maintain said brushes in proper working relation to the cloth. V is a hopper, for feeding the material to the bolt. m is the conveyer, and we prefer to connect it with the driving-power, and to belt from it to the crank-wheel d and fan J.

The material'to be treated is fed in through the hopper V, andis, when the bolt is oscillated, thrown from side to side, sliding across the bolt-cloth. As the air-currents aredrawn through the cloth by the suction-fan J the lighter portion of the bran andspecks passes over thetops of the shelves f, some of it being carried off through the fan, and some falling to the bottom of the shelves. As the bolt is oscillated toward the side on which the spouts are placed, the material or refuse which has collected in each of the pockets formed above the shelves is discharged through the gate 15, which is opened by cord k, the reverse motion permitting this gate to close, and opening gate m by means of cord is, thus letting the refuse fall from the spout.

It is apparent that were the center, about which the --bolting-cbamber oscillates, raised, it would increase the distance over which each brush would travel and sweep the cloth. Thus the number of brushes for each sectionof cloth might be reduced.

The head or receiving end of the bolt being the highest, the meal moves gradually toward the lowest or discharging end; and as the finest cloth is placed at the head, the finest portion of the specks may be taken out at that point by a light draft of air, while the purified fine material is sifted through. The coarser specks and particles of bran may be drawn out in the next section of the air-chamber, the bolt-clothbeing coarser, and so on.

In some of the machines employed before the date of our invention, the air-chamber is arranged below the boltingcloth, and is divided into sections by means of transverse partitions; and it is apparent that it would be difficult, if not impracticable, to use with this construction brushes which traverse the bolt len gthwise, whereas brushes arranged to travel crosswise of the bolt-cloth would not be inter fered with by these partitions.

So, also, brushes which travel lengthwise of the machine are liable to carry the fine and clean material from the head of the bolt and deposit it at the tail of the machine with the coarse and imperfectly-cleaned portion, and to bring, when returning, more or less imperfect-' ly-cleaned material, and deposit it with the fine and better purified. This difficulty is also obviated by'arranging the brushestotraverse 2. In a flour-bolting machine having differthe bolt-cloth from side to side. V. i v cnt numbers of cloth, adapted to deliver the e do not, in this division or reissue, make material in different grades of fineness, and any claim to the pockets above the boltinghaving an air-chamber divided into sections cloth, nor to the openings through'th'e'bol-tilighy; rnea-ns of transverse partitions or walls, a case or air-chamber into these pockets, nor to series of brushes, each shorter than the spaces the oscillating bolt, these devices being embetween said walls or partitions, and so arbraced in reissued Letters Patent No. 6,197, ranged that each brush shall traverse a secgranted to us December 29, 1874; but H I tion of cloth corresponding to a section of the What we do claim is air-chamber, substantially as set forth.

1. In combination with a flour-bolting sur- In witness that we claim the foregoing we face having different numbersof cloth,adapted hereunto set our hands. to deliver the material in different grades of I GEORGE T. SMITH. fineness, a movable or traveling brush, or a a AARON SMITH. series of movable or traveling brushes, below Witnesses to GEORGE '1. SMITH:

the bolt-cloth, and arranged on a line or lines a i SAML. KNIGHT,

parallel with the conveyer of the machine, and G. H. BROWN. moving at right angles thereto, for cleaning Witnesses to AARONSMITH: thebolt-clothwithoutcarryingmaterial lengthl R. MILLER,

wise of the machine, substantially as set forth. I JNo. MGLEAN.

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