US1587291A - Apparatus for screening and grading materials - Google Patents

Description

June 1 1926. 1,587,291

J. FARASEY APPARATUS FOR SCREENING AND GRADING MATERIALS Filed March 26. 1923 2 Sheets- Sheet 1 (9:517 RA/I25;

June 1 192s. 1,587,291

J. FARASEY APPARATUS FOR SCREENING AND GRADING MATERIALS Filed March 26. 1923 2 Sheets-Sheet 2 ,ZZ/ IA OB Patented June l, 192%.

F TATES ra'ranr orrics.

JAMES FARASEY, OF CLEVELAND HEIGHTS, OHIO.

Application filed. March 26, 1923. Serial No. 627,578.

This invention is concerned with concrete mixing and screening devices and has for its object the provision of a novel sectional hopper or bin construction adaptable for the reception of screened concrete ingredients, each bin being arranged to receive material of a common screen size.

More specifically, my invention contemplates the provision of a sectional hopper construction adaptable for the reception of various sizes of concrete forming material, and screened sand, the arrangement of the partitions being such that when sand is being screened by the usual three or four grade rotary screening device, a plurality of the crushed stone receiving bins may be utilized for the storing of the sand after passing through the screens.

A further object of my invention is the provision of a hopper construction having the partition or partitions thereof, defining the bins as a hopper arranged to be adjustable, and having chutes or vpassages controlled by valves extending from one bin to another through the partitions whereby the bins may be used for. the receiving and storing of several grades of crushed stone falling from a rotary screen or a number of the bins may be used for receiving and storing screened sand while other bins of the hop per receive the rejected or unscreened material.

Other objects will be hereinafter set forth in the following description referring to the accompanying drawings which illustrate a preferred embodiment of my invention. The essential characteristics are summarized in the claims.

In the drawings Fig. 1 is a cross sectional elevation illustrating the relation of a screening device and my hopper construction; Fig. 2 is a cross sectional plan view taken substantially along the line 22 of Fig. 1; Fig. 3 is an enlarged cross sectional elevation taken substantially along the line 3 3 of Fig. 2 and Fig. 4 is an enlarged perspective view of a valve construction establishing communication between the various bins comprising my hopper constructiou.

In the preparing and selection of in frequently desirable obtain ingredients for a coarse aggregate, a fine aggregate, or a special aggregate concrete. The grading of the aggregate depends primarily upon the coarseness or fineness of the crushed stone elements in the aggregate and this grading is usually effected by passing the material through rotary screening cylinders. Likewise, it is frequently desirable to screen sand with the same apparatus and store the sa-nd in hoppers as well as the refuse from the screening device, there usually being a number of bins in the hopper for storing the sand after having been screened as well as storing the refuse. In conditioning the apparatus for screening sand, however, it is necessary to remove the coarser screening cylinders and replace them with cylinders having smaller apertures for screening the sand. These cylinders are necessarily heavy and bulky and considerable time and labor are expended in making these changes. H

I accordingly arrange a hopper beneath the usual rotary screen mechanism whereby the various sizes of crushed stone or gravel,

maybe collected in bins or compartments formed in a hopper disposed therebeneath and I combine in the hopper construction a valve arrangement and chutes whereby communication may be established between two or more of the hopper bins. I also provide removable bin partitions so that when it is desired to screen sand, the partitions may be removed and the sand storing capacity of the hopper greatly increased. On the other hand, when several sizes of screened material are being received from the screening cylinders, this material may be kept separated and be directed to the respective storage bins of the hopper through chutes.

Referring to the drawing, in Fig. 2, I show an elevator'E, the buckets 10 of which may discharge their contents of crushed stone or gravel into an elevated chute 11, which guides the unscreened material to the interior of a screening cylinder 12. The screening cylinder is rotatably mounted upon rollers 13 and may be rotated by any suitable power means. The receiving end of the screen is elevated whereby the material may progress through the interior thereof and pass through the various sized openings formed in the cylinder Walls. The

screening device illustrated, is adaptable for the selecting of or screening of four sizes of crushed stone, which for convenience of illustration may be 1/ inch; inch, 1 inch and 2 inch and over sizes.

The end of the cylinder, adjacent the elevator, may have perforations formed therein to permit the passing of the inch size. Surrounding this portion of the cylinder may be a second cylinder in the form of a jacket 14 which has perforations therein corresponding'to a 1/ inch size. A second jacket 15, surrounding the lower end of the screening cylinder 12, may have openings formed therein corresponding to a 1 inch size.

The hopper construction and chutes for receiving the various sizes'of crushed stone may be such that the hopper may be disposed directly beneath the cylinder whereby some of the screenings may fall directly into the storage bins of the hopper while other sizes may flow through chutes into other bins. The screening cylinder 12, therefore, may be mounted at a sutlicient height upon pedestal members 16 and 17 whereby a substantial storage space may be provided in the hopper bins, and to permit positioning of a vehicle beneath the hopper. To facilitate the receiving and storing of the screened material as it flows downwardly into the hopper from the screening cylinders, I arrange the hopper with the bins thereof in an offset relation relative to the cylinders. As shown in l? 3, the hopper 20 may be divided into four compartments or bins by interior walls 2.1 and extending substantially the height of the hopper and terminating}; at the bottom thereof in valves as will be described.

Extending from adjacent the ends of the outer screening cylinders 14!- andlo are chutes formed by members and 26, respectively, which slope toward the partition wall 22, and terminate in 'all openings '27 and 28 respectively. The chute 23 guides the material from the g inch sereei'iing cylinder'to the bin 1-30, while the relative position of the screeningcylinders to the hopper are such that the Lt inch screenings drop directly into the bin 31. and the l. inch screenings, from the cylinder l3), drop directly into the bin 32. The 2 inch and larger screenings are guided by the chute 26 to the refuse bin 33.

'fhe lower portion ofthe hopper has the'walls thereof sloping inwardly and terminating at valves as shown at'35 in Fi 3. These valves may comprise closure mourners 36' mounted upon pin members 37 secured to 'aframeniember attached to the lower end of the hopper. Theinembers 36 extend acrossand close opei'iingsof nozzle members etO'wh'ich are carried the'frameBS. if it is desired, a vehicle may bepositioned he- 6 eath the nozzle -open-ings and inaterial stored in any one of the bins may be discharged directly into the vehicle by opening the nozzles.

It is frequently desirable however, to use the device for screening sand and in the particular arrangment illustrated in the drawing, it will. be noted that the sand when screened will pass through the cylinder 14.- and fall directly into the bin 3t. The refuse material would pass into the bins 30, and 33, and since the volume of rejected material is greatly less thanthe amount of sand passing through the screen 1-1:, the bin 31 would be filled while the remaining bins would be comparatively empty. To utilize a greater portion of the hopper for storing the screened sand, I arrange the partition wall 22 between the bins 30 and 31 whereby a section 22 of the wall. may be swung to the dot and dash position as indicated in Fi g. 2 in juxtaposition to the partition wall 21, thus obtaining a large bin for the storage of the screened sand which is substantially equal to half the storage capacity of the hopper. The partition wall section (22) may be hingedly connected to the partition wall 21 at substantially the vertical center line of the hopper. Any suitable means such as a latch 62, may serve to retain the partition section (22) in the position illustrated in Fig. 2 when it is desired to use the screening device for other purposes than for screening sand.

hen the device is used for screening sand. it is important that the refuse material falling into the chute from the screen cylinder ll be directed into either the bin 32 or 33.

I therefore incorporate a valve mechanism in the hopper construction which may be as sociated with tholower portion of the chute 23 whereby the g inch screenin s (refuse when screening sand) may be discharged directly into the .1 inch storage .bin which reeeives refuse'from the cylinder 15.

The valve mechanism may comprise a. closure member -ii'5 slightly'l'arger in dimensions than the opening 27 formed in the route wall 25 and a second closure member h; extending normal to the member +25 and con'iprising a sector adapted to close an opening 4:7 formed in the partition wall 91 and which establishes communication between the chute and the 1 inch storage bin -53. The closure members l5 and 4 may he relatively rigid and be carried by a rocker it which extends along the partition wall 22 to the exterior of the hopper 20. The uter end thereof may be provided will a crank lever whereby the closure member may be shifted or rocked within the confine of the lower portion: of the chute 23.

As shown in Fig. 4-, the valve mechanism 1 positioned whereby the closure member -15 '-.1s-"1nterruptzng communicating between the i, l. U

% inch storage bin 30 and the chute 23 and the closure member 46 is swung to the left whereby the exposed opening 47 establishes communication between the inch chute 23 and the 1 inch storage bin 32. The inch screenings thus pass directly from the screen cylinder 14: downwardly to the chute 23 and through the opening 7 and directly to the bin 39, and becomes commingled with the 1 inch screening dropping directly from the screening cylinder 15 to the storage bin 35%. The portion 22 of the partition wall which is hingedly mounted is swung (in this case) to the right against the wall. 21 thus permitting the screened sand falling from the cylinder 14{ to fall one-half of the hopper.

If it is desired to have the various screened sizes separated, the rocker lever may be swung to the right and thus bring the closure member 416 over the opening 4i? and shift the closure member 45 backwardly to a position adjacent the bottom of the chute member 25, thus permitting the 5 inch screenings to flow directly into its storage bin 30. Positioning of the wall 22 as shown in Fig. 2 reconditions the hopper for the reception and storage of four grades of screened material.

The particular valve arrangement illus; trated, it will be observed, may be readily operated by the lever 52, the relation of the opening 4:7 to the bottom of the chute being such that any particles of material accun'iulat ed in the bottom of the chute, when the opening l.) is closed, may be readily brushed through the opening 47 to permit the closing thereof by swinging the member 46 thereover.

Fronrthe foregoing description of my invention, it will be observed that I pro vide a very simple devicewithin .a hopper construction whereby the hopper may receive a plurality of sizes of screened material which may be directed to and stored in a plurality of bins formed by partition walls within the hopper. If it is desired to screen sand, substantially onehalf of the hopper space may be utilized for the storage ot' the screened sand by the operation of a simple valve mechanism and the swinging or removing of a partition wall within the hopper whereby screened sand may fall directly into a space corresponding to two of the bin spaces oi the hopper. The simplicity of the arrangement is such that the hopper may be readily conditioned for either the reception of graded sizes of material or for the reception of sand in a short period of time. It is to be under stood that the idea of a valve arrangement and the removal of partition walls for establishing communication between the chutes and the various bins of the hopper and means associated, with the chutes and the walls of the hopper for opening and closing passageways whereby the hopper inay oe readily conditioned for the storage ity, a chute for guiding material into a.

region adjacent two bins, and means for determining which o'l said two bins shall receive the material con'iing down the chute.

2. In a machine of the character describes, a sectional hopper adapted to be disposed beneath a screen, and having bins produced by the outside hopper wall and par ition walls, whereby some ot' the screenings may be discharged directly into some of the bins of said hopper, said hopper having fixed chutes located in certain bins for simultaneously guiding other grades of the screenings into other bins of the hopper, and means associated with said chutes whereby a graded material flowing from the screen to its respective bin, may be diverted another graded material.

to the bin or In a machine of the character described, a hopper having a plurality of bins adaptable for the reception oi various grades of material, fixed chutes in the hopper for guiding the various grades of material to a region adjacent two bins, and means associated with the chutes for di verting the flow of one grade of material from its bin into the bin ot another grade of material.

4. A machine of the character described, a hopper having a plurality of walls therein for dividing the hopper into a plurality of storage bins, openings formed in said walls establishing communication between the various bins and means associated with the walls for alternately exposing one opening and closing the other, whereby material designated for one bin may be directed into a bin containing a material of a different grade. 7 5. In a machine of the character described, a hopper adapted to be disposed beneath a screen, said. hopper being divided into a plurality o1 storage bins adaptable for the reception of various graded mate rials flowing from the screen and having removable partition walls, whereby screened material of a common grade may flow from the screen into a space corresponding to two bin spaces.

6. In a sectional. hopper of the character &

described means for guiding the grades of material to receiving bins of the hopper, means for selectively guiding a grade of material destined for one of the bins into the bin of another grade of material, and removable partitioning means defining the bins of the hopper whereby the storage capacity of the hopper for a particular screened material may be increased.

7. ln a hopper o'l'i-the character described, a plurality of dividing walls defining the storage bins of the hopper, means for guiding separate grades of material to the receiving bins of the hopper, means for diverting the flow of one grade of material into the bin of another grade of material, the partitionwall defining the first-named bin. being reniovable, whereby the material destined for an adjacent bin may occupy the space of two bins.

8. in a machine of the character de scribed, a hopper beingdivided into a plurality oi :-.:torage bins adaptable for thereception oi various graded materials, and having a hinged partition wall whereby the ot' a bin space may be increased by swinging said wall into juxtaposition with another hopper Wall.

9. in a machine ofthe character dei a hopper, walls within the hopper J a material chute associated with one of such 'alls and extending downwardly and terminating at openings formed in adjoining dividing walls of the hopper, and means for controlling said openings.

10. In a hopper of the character described, the combination with the surrounding outside hopper wall of a plurality of dividing walls radiating from a common axis and defining the storage bins of the hopper, a chute mounted on one oi? such dividing walls for guiding material through another of such walls into the bin beyond the latter wall, and means at the lower end of the chute iior diverting the flow of 'material a plurality of storage bins therein,

from the last mentioned bin intothe bin of another grade of material.

11. A sectional hopper of the character described comprising an outer wall and partition walls radiating from a common axis to produce a plurality ofbins grouped together to have vertical corners adj acent each other, each bin having an individual gra *ity dischar e and means associated with one bin ad acentthe common corner for divert ing material normally destined for that bin to another bin.

12. ln a sectional hopper of the character described, the combination of a plurality oi bins grouped together to have corners adjacent each other, an inclined chute in one of the bins leading downwardly alongside of one of the partition walls and a valve adapted to direct the discharge from the chute laterally through the wall ahead of the chute or through a wall at an angle to such wall.

13, A sectional hopper of the character g; ouped together to have four corners adjacent each other, a chute in one of the bins leading to a region adjacent the common miner and n'ieans associated with said chute "for diverting material normally destined for one bin into another bin.

14. in a sectional hopper ol? the character d .ribed, the combination of four rectangular bins grouped together, to have corners adjacent each other, each bin having an in clined bottom wall leading to a gravity discharge, an inclined chute in one of the bins mounted on one of the partition walls, a valve adapt-ed to direct the discharge from the chute laterally through the wall carrying the chute or through a partition at an angle to such all, one of the partition walls other than that which carries the chute being movable.

In testimony whereof, I hereunto afiix my signature.

JAMES FARASEY.

-ribed comprising tour rectangular bins

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