USRE11555E - Sifting apparatus - Google Patents

Description

2 sump sheet 1. E. R. BEAVER. SITTING APPARATUS.

No. 11,555. Reissued July 7, 1896.

2 SheetsShet 2.

3. DR AV ER. sxrwma APPARATUS;

No. 11,555. 4 Reissued July 7, 1896.

Un -TED STATES PATENT O FIC EMIL R. nRAvEa-, or' ALLIANCE, NEBRASKA.

i SI.FTlNG ;APPARATU S.

To all whom it may concern.-

Be it known that I, EMIL R. DRAVER, of Alliance, in'the countyof Boxbutteand Stateof Nebraska, have invented certain new and usef Lil Improvements in Sifting Apparatus and I do hereby declare that the following is a full, clear, and exact description ofthe invention,- such as will enable others skilled in the art to which it appertains to make and use the same,

reference being had to the accompanying drawings, which form a part of this specification.

My invention relates-to an improvement in sifting apparatus which I have particularly designed for use ,in connection witl i'flourmills, though it may be useful in other connections for its sifting function.

My objects are to provide an improved construction of the sifting-surface, and also of the conveying-surface of the imperforate bottom of the sifter, by means of which the freedom of motion over these surfaces, respectively, of the material to be sifted and of the sifted material shall be materially enhanced.

According to my improvementl form the sifting apparatus with compartments, one beside the other, having sifting-surfaces in-v clincd downward toward each other, the compartments communicating at ornear both ends, whereby, when suitable motion is imparted tothe apparatus, a continuous circulation is produced of the coarse particles of the material being sifted, which do not pass through the meshes of the screen; and my improvement also involves constructingthe apparatus without obstructions (such as the commonlyprovided inclined steps, crossslats, or battle-strips, and the like) on the surfaces to the desired freedom of travel ofthe material, whereby the surfaces are rendered plain and smooth, and the light fluffy matestruction of my improved sifting apparatus;

and it also consists in details of construction and combinations of parts, all substantially :is l1crcinaftcr described, and pointed out in the claims.

lioferring to the accompanying drawings, .lfiguro I represents my improved sifting ap paratus by a view in side elevation. Fig.2 isya section taken at the line 2 on Fig. 3 and viewed in'the direction of the arrow; Fig. 3, a filan View of the sifter; Fig. l, a section taken at the line 4 on Fig. 2 and viewed in the direction of the arrow; and Fig. 5, a section taken at the' line 5 on Fi and viewed 'inthe direction of the arrow.

A is the frame, which is preferably of the oblong rectangular form illu 'v'rated, and which should be'providedwith means for suspending it, (shown as buttons 1",) provided on opposite sides near the ends of the frame and at which to fastenthecords q, orother flexible mcdium' of suspension.

- Bis-a partition extending lengthwise along the center of the frame and provided near its opposite ends with flap-valves or gates p and p, which open in relatively opposite directions, and cover openings in the partition, the bases of which incline upward from one side to the other of the partition, as shown, of the opening in Fig. 2, except that the opening controlled by the valve and which is not shown in elevation, inclines in the opposite direction.

.From each side of the partition it, at a point near the plane of the bases of tho gat'es,there extends, inthe direction of up ward'inclination toward the opposite sides of the frame, a bolting cloth or screen (I; and the frame is provided with a cover D, reinforced by cleats o, placed at suitable intervals to extend from each side of the partition B to the adjacent side of the frame.

E is an imperforate bottom below the screen 0 and inclining correspondingly with the latter, ;or approximately so.-

In the cover D near one end and at one side of the partitionll is an inlet-opening n V for the material,.and towhich leads iho spout 'n; and adjacent to. the inlet, but at the op.- posite side of the partitiomaro the dischargeopenings or and Z, one in advance. of .ihe other, both being formed in the bot tom 1* on which there is a transverse partition ll, separatingthem, and to that end cxi ndin perpendicularly between the bottom and the screen C. The opening'fi is covered bya section of screen G of somewhat wider mosh than 'the screen C and on the same plane with the latter; and from the openings nand l there depend, .respectively, the dischargespouis m and Z. I also provide in the bottom E, 'at the end ofthe apparatus adjacent to a valve 13 in the partition B, and in the section of the apparatus containing the inlet n, adischarge-opening it, from which leads the dischargerspout I To produce the sifting operation of my improved apparatus, motion has to be im parted to the'screen and imperforate bottom 1 surfaces, which motion may be of-a gyratory Y orundulatory or of other suitable character.

As means for the purpose I show in Fig. 1 a

stand F,'in which is journaled an upright rotary shaft 71-, carrying abelt-pulley i, and,.at its upper end, a crank g, engaging the bottom E near its centeigthe frame A being suspended by the cords q in a manner to pro.- duce such engagement.

The material to be sifted is fed through the inlet-spout n to the screen 0, on "which there should also be a supply of suitable coarse cleaning material, such-as beans, peas, or'the like. By setting the shaft h in motion a gyratory motion is imparted to the frame A,

. and consequently to the screen and imper- 'forate bottom surfaces, causing the material to be sifted to travel from the inlet or toward the opposite end of the apparatus, from which the motion passes it through the gate 13 into the section'of the apparatus containing the coarser screen 0, toward which the motion impels the material, and through which the chaff or'refuse drops to the opening Z and discharges through the spout Z. The cleaning material, being too coarse to pass through the screen-sections 0', passes through the gate 19 into V the first section of the apparatus. .Thus this coarser cleaning material is in continuous circulationon the'screens G O throughout. the operation 'of the apparatus.

The sifted material, or that which passes through the screen (I to the bottom E,is workedalong the latter, like the-material on the screen, by the motion imparted to the apparatus, and discharges at the opening 7c,through the spout'k", while that which is carried, un-

sifted, with the material through the gate 19 is siftcd'through the screen 0 in the section of the apparatus provided with the outlet "In, toward which it is worked and through which it is eventually discharged into the spout m. \Vhcn it is desired to mix the sifted material from both sides of the partition B, the opening 7,: may be suitably covered, so that the sifted material will pass through the gate 2J2, I

Fig. 6, and continue on to the dischargeopening m.

The feature of slanting the screen-surface and. that of also slanting thcimperfora'te bottom surface in the manner shown and described. is of great importance, as thereby the sifting operation and that of working the sifted product toward the discharge-open ings in the bottom are greatly enhanced and the eificiency of the apparatus accordingly increased,

The feature of the gate-covered openings in the partition B, provided with the upwardinclined bases, as described, presentsthe advantage of the bases affording stops at their higher ends to the lower ends of the gates, and. that of providing more effectual closure of the gates than if the openings had horizontal bases. Means for producing thoroughly-effective closure :by the gates of the openings in the partition are necessary, particularly at the feed end of the apparatus, since the feedopening and the discharge-opening are atopposite sides ofthe partition adjacent to an opening therein,-and unlesssuch effective closure of the opening were provided the material, or a part thereof, would be liable to pass 1 through it and out through the dischargeopening, instead of over the sifting-surface.

It will be noticed that, as representedin'the drawings, the partition B is formed by the adjacent sides of two frames A, bolted together,

which construction is preferred in the'matter of convenience. v What I claim as new, and desire to secure by Letters Patent, is-- 1. In a sifting apparatus, thecombination of a frame closed at its ends and having a partiti on dividing it into sections, openings in the partition toward its opposite ends through which the sectionscommunicate, theopening near the fecdendof on esecti on being covered by a gate opening into that section, screen bottoms in the sections, a collecting-bottom under the screen, provided with a dischargeoutlet, and means for imparting motion to the apparatus, substantially as described.

2. In a sifting apparatus, the combination of a frame closed at its ends and having a longitudinal partition dividing it into sections and containing, near its ends openings provided with oppositely-opening gates, in elining screens affording sifting surfa'ces in said sections and extending between the opposite sidesof the frame and those of the partition below. the plane of said openings, an inclined bottom on the frame below each screen, provided with a discharge-opening,

and means for imparting motion to the frame, substantially as and for the purpose set forth. '3. In a sifting apparatus, the combination of a frame closed at its ends and having a longitudinal partition dividing it into sections and containing, near its ends, openings provided with oppositely-opening gates, in-

clining screens affording sifting-surfaces in said sections and extending between theopposite sides of the frame and those of the partition below the plane of said openings, an inclincd bottom on the frame below each screen extending bctwccna side of the frame and the adjacent side of said partition, and provided with a discharge-outlet, a partition adjacent I to said discharge-opening extending between a side of the'framc and the longitudinal partition, said base having a chaff-discharge opening adjacent to an opening in said longitudinal partition and'onthe opposite side of said transverse partitionand covered by a coarse-mesh section of the screen,and means for imparting motion to the frame, substantially as and for the purpose set forth.

4. In a sifting apparatus having the parallel sifting-sections dividedby a longitudinal partition, openings in the paptition at oppo-- site sides of its longitudinal center above the planes of said sifting-surfaces and provided with gates openin'g'i'n opposite directions, the bases of at least one of said openings inclining upward from one side to the other of the partition and affording a stop for its gate,substantially as and for the purpose set forth.

5. In a sifting apparatus, the combination of a frame closed at its ends and having a longitudinal partition dividing it into sections and containing,-near its opposite ends openings provided with oppositely-opening gates,the bases of said openings inclining upward, respectively in opposite directions from one side to the other of the partition and affording stops for the gates, inclining screens affording sifting-surfaces in said sections and extending-between the Opposite sides of the frame and those of the partition below the plane of said openings, an inclined bottom on the frame below each screen, provided charge-opening 10 near one endand dischargeopenings m and 1 near its opposite end, separated by'a partition B', .'a coarser screen 0' over the opening 1, an inlet-opening 'n in the cover, and means for imparting motion to the frame, the whole being constructed and arranged to operate substantially as described.

- r EMIL R. DRAVER.

In presence of- H. V. SCHAUPP, H. O. Dnn'vnn.

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