USRE7618E - Improvement in apparatus for drying ground wheat - Google Patents

Description

C. S. F U L L E R. Assig'nor to'C. R. Knickerbocker,

1 A E H W D N U o R G G N I V. R D 0 F S U T A R A P P I A 8 1 6 .7 O N Reissued April 17, 1877.

Edy. 1

[ill/tiller dalin/ N. PETERS, PHOTO-LITHOGRAPHER, WASHINGTON, D c.

UNITED S TES PATENT OFFICE CLARK SIFULLER, or LA FAYETTE, INDIANA, ASSIGNOR 'IO CHARLES R. KNIGK RBOOKER; OF JAcKsoN, MICHIGAN.

' lMPRO V EMEN T m APPARATUS FOR DRYING GROUND WHEAT.

Specification forming part of Letters Patent No. 162,910, dated May 4, 1875; reissue No. 7,618, dated 7 April17,1877; application filed February 28, 1877. J

To all whom it may concern: I

Be it known that I, CLARK S. FULLER, of La Fayette, in the county of Tippecanoe and State of Indiana, have invented certain new and useful Improvements in Apparatus for' has been paid to the purification of middlings by means of air-currents. In some machines the material is passed over a fiat reciprocating shaker, through which air-currents are drawn or. forced in an upward direction, while the middlings, or a portion of them, fall downward. The bran and other refuse matter, being of lighter specific gravity, is separated from the pure middlings by the air-currents.

In other machines or constructions the separation is efi'ected in vertical spouts or trunks, the air-currents moving in an upward direction against the falling middlings.

In still other constructions the purification by means of air-currents is effected in reelbolts but in all of these devices advantage is taken of the difference in specific gravity between different portions of the material.

The object of one part of my invention is to effect a thorough separation of the particles of bran and other deleterious matter from flour or middlings; and to this end it consists in subjecting the material to the drying action of artificial heat, and subsequently purifying by the action of air-currents.

Another part of my invention relates to the specific construction of an improved apparatus by means of which heat may be applied to the 4 are vertical cross-sections of the apparatus,

respectively, on lines a; a: and y y, Fig. 2.

Like letters of reference designate like parts in all of the figures. A

A is the stationary frame of the apparatus,

and B the outer inclosing drying-cylinder supported therein, and provided at its upper end with a spout, I), through which the material to be dried is fed into the same, and near its opposite lower end with a spout, 11 for the discharge of the dried material. 7 It is also provided at its upper side with adjustable ventilators b permitting the escape of the vapors evolved during the drying process.

O is the revolving steam-drum arranged within the drying-cylinder B, and secured to a hollow shaft, a, passing through the head of the cylinder and revolving in suitable bearings c The bore bore is provided with openings 6 e, forming passages to the interior of the steam-drum.

One part of thehollow shaft connects, by means of a trunnion, with the steam-supply pipe f, the steam entering the drum 0 from the shaft by the openings 0, and the other part of the pipe connects with adischargepipe, by which the waste steam escaping from the drum into the hollow shaft by the openings e is conducted to any desired place.

The drum 0 is preferably arranged slightly inclined, so that the condensed Water accumulates at one end, from whence it escapes through openings 9, provided with springvalves, into a com partment of the outer case A, from which it is discharged by a waster p yh is an annular flange, secured to the surface of the steam-drum near its lower or rear eud, so as to fit snugly within the cylinder B,

for the purpose of separating the compartment into which the condensed water is discharged by the openingsg from the main compartment of the cylinder B, in which the material is dried.

c are longitudinal ribs, secured to the drum of the shaft c is divided at the center by a partition, d, and each part oil the 0 and extending fro-m the front end thereof to the flange h, so as to elevate the material from the bottom of the drying-cylinder as the drum revolves, to the highest point thereof,

a and then permit the same .to descend over the surface of the drum onithe other side. I

k is represent a number of inclined plates,

arranged on the surface of the drum 0 at a greater or less distance apart, so as to break up the material as it descends over the surface of the drum. and at the same time propel it toward the discharge-spout of the cylinder. The ribs 11 and plates k are made of such width asto nearly touch the outer cylinder. and the material is fedin at such a rate as to keep the narrow annular space between the drum and the'out-er cylinder nearly filled, whereby the drum'i's' kept covered with a layer of the materia'handa continuous cp eration of the apparatus is insured.

The drum is rotated by a gear-wheel, l, mounted on the shaft 0 and driven by a pinion, l, or in any other suitable manner.

The chops orground grain come from the stones in a more or less damp condition, and are fed into the cylinder B by the spout h, and repeatedly passed over. the heated drum I O by the revolution thereof, whereby all the moisture is expelled from the chops, and the same rendereddry and crisp.

The flour, when damp, has-amore or less A grayvor yellowish appearance, which, by subthe chops,-especially of the fi-nebran and fuz,

aration of the chops into flour, middlings, 8tc., by bolting, is greatly facilitated, audthe gum hung up of the meshes of the bolting-cloth is prevented. I I I Furthermore, the purification of the middlings,which consists in removing therefrom the sharp or fuzzy particles by the action of an air-current, is greatly facilitated, and rendered more perfect after the chops have been subjected to the action of the drying apparatus.

What I claim as my invention is- The combination, with the outer station- I ary cylinder B, of the revolving steam-drum "0, provided on its outer surface with ribs 11 3. The herein-described method of purifying m idcllings, by subjecting to the action of artificial heat, and then removing the impurities by means .ofair-currents, substantially as set forth.

Intestimon-y that I claim the foregoing I have hereunto set my hand this 21st day of February, 187 7 7 CLARK S. FULLER.- Witnesses: I OLIVERO'; GOLDSMITH,

OHARLEs GROENENDYKE.

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