US551309A

US551309A - braver

Info

Publication number: US551309A
Authority: US
Publication date: 1895-12-10
Anticipated expiration: 1912-12-10

Description

5 .E E V A R D E B SIPTNG APPARATUS.

Patented? Deo. 1o, 1895.

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E. R. DRAVER.

SIFTING APPARATUS.

Patented Deo. 10

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SIPTING APPARATUS.

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SIPTING APPARATUS. No. 551,309, Patented Dea, 10, 1895.

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UNITED STATEs EMIL R. DRAVER, OF

PATENT OFFICE.

ALLIANCE, NEBRASKA, A-SSIGNOR TO FLORENCE N.

DRAVER, QF SAME PLACE.

SIFTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 551,309, dated December 10, 1895-.

Application led August 3, 1895. Serial No, 558,101. (No model.)

To al?, whom it may concern;

Beit known that I, EMIL R. DRAVEE, a citizen of the United States, residing at Alliance, in the county of Boxbutte and State of .Ne-

braska, have invented a new and useful Iml' provement in Sifting Apparatus, of which the following is a specification.

The primary object of my present improvement'is to provide, principally for milling purposes, a sifting apparatus involving a number of controllably-intercommunicating sections or compartments, to enable diiierent materials or kinds of material to be operated on and to be mixed in the sifting operation according tothe desire of the operator.

Referring to the accompanying drawings, Figure l is a plan view of my improved sifting apparatus with the top or cover removed; Fig. 2, a view of the same in side elevation; Fig. 3, a section taken at the line 3 on Fig. l and viewed in the direction of the arrow; Fig. 'l, a'section taken at the line 4 on Fig. l and viewed in the direction of the arrow; Fig. 5, a section taken at the line 5 on Fig. l, viewed in the direction of the arrow, and showing by a dotted representation a modified construction of the cover; Fig. 6, a view like that presented by Fig. l of my improved sifting apparatus containing a modified construction; Fig. 7, a section taken at the line 7 on Fig. 6 and viewed in the direction of the arrow; Fig. 8, a section taken at the line 8 on Fig. 6 and viewed in the direction of the arrow; Fig. 9, a view like that presented by Fig. l, but show ing another modified construction of the apparatus; Fig. 10, a section taken at the line l0 on Fig. 9 and viewed in the direction of the arrow, and Eig. l1 a section taken at the line 11 on Fig. l and viewed in the direction of the arrow. Eig. l2 is a view like that presented by Fig. 5, but showing the cover in clined.

Referring particularly to Figs. l to 5, inclusive, A is a rectangular box provided near each of its four corners with a button -r at which to suspend it from overhead by cords 7", or the like; and for imparting desired motion to the apparatus to cause it to perform its sifting function any of various means may be provided, the means shown comprising a stand B, in which is journaled an upright 4side of the box.

rotary shaft q carrying a belt-pulley q and, at its upper end, a crank q2 engaging the 4bottom of the box A at a pin g3 near its center.

The box is divided along its horizontal center by a partition O, which extends short of the ends of the box to leave passage-ways about its opposite ends.

C', C2 and G3 are transverse partitions, two of which extend from one side of the partition C, toward its ends, to the adjacent side of the box, and the other transverse partition C3 extends from about the center of the opposite side of the partition O to the adjacent Thus'one compartment, D, is formed between the partitions C and O2, another, D', between the partitions C2 and C3, and a third, D2, between the partitions (l3 and C. Inlet-openings p are provided in the boxcover A', through which to feed the material or materials to be sifted.-

I find that in practice it is desirable to slant the box-cover, as indicated in Fig. 5, and clearly represented in Fig. l2, to form a pocket or contraction in the passage along each side of the sitter, which causes the material to travel better. In the several compartments are screens E, E and E2, each of which inclines slightly upward from its part adjacent to the feed-inlet leading to it, to the transverse partition at the opposite end of the compartment, and along the higher sections adjacent to transverse partitions the several screens are of coarser mesh, as shown at fo, than throughout the remainder of their extents, the coarse sections being provided, underneath them, with chutes o', each ot which leads through an opening o2 in a side of the box, and equipped with a slide-valve 'v3 to a discharge-spout o at that side.

The bottoms o, o and 02 ol the compartments D, D and D2 incline parallel with the screens therein and afford conveying-bottoms, and in each of the bottoms, at its Vlowest point, is a dischargeopening n leading to a spout n and provided with a slide-valve n2.

In each of the transverse partitions Q', C2 and C3 there is provided, above the screens, an opening m covered by a hinged valve m, and in each said partition below the screens there is provided an opening Z covered by a hinged valve l', the valves Z and m having IOOv the handles Z2 and m2, respectively, projecting beyond one side of the box A, where each is propped in its raised or lowered position by a pin :t adjustable in either of the two holes ou suitably located to receive it.

The material to be sifted in each compartment is introduced upon the screens therein, at their lower ends, through the inlets p, and the motion imparted to the apparatus by rotating the shaft q works it upon the screens to cause the flour to pass through them upon the bottoms 0, o' and o2, whence it may discharge through the outlets n, and to cause the coarse product, or tailings, to attain the coarser-mesh screen-sections, through which they pass into the discharge-outlets r4.

Vhen it is desired to mix any of the material or materials of one or more of the *compartments, one or more of the large-mesh screen-sections o may be covered by any suitable means to prevent the passage through them of the coarse material, and with one v.or more of the valves mf open this coarser maferial may pass from .one compartment into another through the openings my. Similarly when it is desired to mix the product of sifting through the finer mesh of a-screen, which falls .on a bottom yo, 0 or o2., with the product on the bottom of either end of the other compartments, it is only necessary to close the proper valve or valves a2 and open the valve or valves Z to produce intercommunication of the compartments below the screens, thereby causing the material to pass from one compartment to another until the outlet which has been left open is reached.

It will be noticed that the feed and discharge ends of the various sections are adjacent to one another, with the feed ends of the screens and bottoms lower than the discharge ends thereof, to prevent any of the material from one compartment passing out with the tailings from the adjacent section.

The construction illustrated by Figs. G, 7 and A8 differs from that shown in the preceding figures in having the screens E, E and E2 and the bottoms 0 o' and 02 mainly hori- Zontal but inclined abruptly upward toward their discharge ends. Thus, as seen in Figs. 7 and 8, the coarse-mesh sections t' are horizontal, and on a higher plane than the Vfinermesh portions of the screens, which abruptly incline upward to join them, and the bottoms o, o and o2 turn abruptly from the horizontal and incline upward to the opening Z.

According to the construction illustrated in Figs. '9, 10 and ll, the box A 'has provided in it a rectangular partition open at one end and divided along its `center :by a partition C4, which extend-s from one end of the box to the other. Thus two compartments D4 and D5 are formed, in the nature of channels, the former extending from .an inlet 29 in the box-.cover along the outer side of the vrectangular partition C5 and about the end back along the inner side, and the channel D5 eX- tending from the inlet 19 in the cover along the inner side of the rectangular partition and about the end thereof back along the outer side. The compartments D4 and D5 contain screens E* and E5 inclining from the inlets to the mouths of the outlets t5, where the screen is of coarse mesh, as indicated at o, to permit the tailings to pass through. The discharge-outlets n3 for the flour which sifts through the screens extend from the bottom o4, which in this construction is shown hori- Zontal for both compartments. In the partition Ci are the openings m2 and m3, respectively, adjacent to the coarser-mesh sections r in the compartments D4 and D5 to render them intercommunicating, and below the screens in the same partition are provided the openings Z2 and Z3 to render the compartments there intercommunicating, -all for the purpose hereinbefore described. These open-ings may also be provided with valves, though .all valves are omitted from the illustration of the modified `constructions to avoid confusion.

The operation of the modification last described is precisely the same aS that of the construction represented by Figs. 1 to 5 inclusive.

Thefdetails of construction of my improved sifting apparatusshown and described are the best known to me. They may be variously modified, however, and the construction may be amplified, as by providing a series of the sifters one `above the other, without departure from my invention.

What I claim as new, and ldesire to secure by Letters Patent, is-

1. Ina sifting apparatus a `bor adapted to be suspended and provided with mean-s for imparting to it the sifting motion, said box being divided into intercommunicating compartments provided with discharge outlets for the si-fted product, an inclinedcover provided with one or more feed-.inlets for the said compartments., a screen in eachcompartment eX- tending between its bottom and said cover and forming a pocket with said inclined cover and havinga finer-mesh section and a coarsermesh section, and discharge-outlets for the tailings leading from said 4coarser-mesh sections, substantially as and for the purpose set forth.

v2. In a sifting apparatus, ya box adapted to be suspended and provided with means for imparting to it the sifting motion, said box being divided into intercommunicating compartments provided with dischargeeoutlets for the sifted product, a cover provided with separate feedinlets, one for .each compartment, a screen in each compartment extending between its bottom and said cover an d inclining upward toward the dischargeend of the compartment, said screen having a iiner-mesh-section and a .coarser-meshsection `at the higher end, and discharge outlets lfor the tailings leading from said coarsermesh sections, substantially as and for the purpose set forth.

3. In a sifting apparatus, a box adapted to be suspended and provided with means for lOO IIC

imparting toit the sifting motion, said box being divided into compartments intercommunicating through openings provided above and below the screens therein., valves at said openings, aording means for opening and closing, at will, said compartments to each other, discharge outlets for the sifted product from said compartments, a cover provided with feed-inlets leading to the compartments, a screen in each compartment extending between its bottom and said cover and inclining upward from the inlet to the discharge-end of the compartment, said screen having a finermesh section and a coarser-mesh section at its higher end, and discharge-outlets for the tailings leading from said coarser-mesh sections, substantially as and for the purpose set forth.

ai. In a sifting apparatus, a box Aadapted to be suspended and provided with means for imparting to it the sifting motion, a partition C and partitions C C2 C3 in said box dividing it into compartments D, D and D2, a cover A on the box provided with feed-inlets p, inclining screens E, E and E2 in said compartments having coarser-mesh sections t at their higher ends, openings m and Z in the transverse partitions respectively above and below the screens and provided with valves fm and Z', bottoms o, o and o2 for the compartments inclining parallel with the screens therein and having discharge-outlets n provided With valves n2, and valve-controlled discharge-outlets leading from underneath the coarsermesh screen sections, substantially as and for the purpose set forth.

5. In a sifting apparatus, a box adapted to be suspended and provided with means for imparting to it the sifting motion, said box being divided into intercommnnicating conlpartments, an inclined screen in each compartment, an inclined cover above the screens provided with feed inlets, and forming a pocket along a side of the sieve for enhancing the travel or the material and an inclined bottom belovvr said screen provided with a dischargeoutlet, substantiallyT as and for the purpose set forth.

EMIL R. DRAVER. In presence olf- H. V. SGHAUPP, F. W. SCHAUPP.