US878728A - Wire screen. - Google Patents

Description

PATENTED FEB. 11, 1908.

0. B. HARROP.

WIRE SCREEN.

APPLIOATION FILED MAYQ, 1907.

2 SHBETS-SHEBT 1.

mm l m. L a 9 1 MW 9 PATENTED FEB. 11,1908: 0. B. HARROP. 4

WIRE SCREEN. APPLICATION FILED my 9,1907.

' 2 snsnrs-saznr 2.

mimess es. I 23mm.

" aarlfiJ arru a 30 spacing bars properl UNITED sTA TEs PATENT OFFICE.

A a1; 1;. manor, or commons; on' o, ASSIGNOR TO THE RICI-IARDSON-LOVEJGY ENGINEERING COMPANY, or COLUMBUS, OHIO, A OORPORATI'ON'OF oH o;

'wm's SCREEN.

Specification of Letters Patent.

Patented Feb. 11, 1908.

Application and May 9.1907. seen Nb. 3721823.

Ohio, has invented certain new. and useful Improvements in Wire Screens, of which the following is a specification.

My inventionrelates to improvements in wire screens, especially of that: class of screens which are adapted to remain stationary While the process of screening is being carried on.

It comprises improvements-in the devices for Ttensioning the wires whereby the same 5 may not only be. adjusted as-tightly as desired, but may readilybe removed and other wires readily inserted in their places; it fur- 'the'rtconteinplates the use of a" wire having both its endssecurfed at the same end of the i screen, whereby a single wire forms two strands, of the screening surface; it further contemplates means for imparting a .vibratory motion to the wires wherrdesired for cleaning the same; it further contemplates 2 5 the provision of a head member in which the ends of the various wires are secured, con

structed in such manner that-all of the wires used are of substantially the same length; it further contemplates the use of removable threaded for the osi-' honing of the wires thereon; it contemp ates other improvements which shall be hereinafter specifically set forth. g

Referring to the drawings in'which one embodiment of my improvement is disclosed,

Figure 1 is a projection. of the screen; Fig; 2 is a side view ofthe screen with parts broken awa Fig. 3 is a vertical section through the bee member, disclosing the manner of posi-' i tioning the securing bolts Fig. 4 is a top view of one of the transverse slots through the I headgrmember, showing the bolts in place; Fig. 5 represents one of the wires passing from its hook bolt over theface of the screen and around the anchor-bar and back over the face of the screen, beingsecured to an adjacent hook bolt.

Referring to thedrawin s in which the same numerals indicate fire same parts throughout, 1 and 2 areth side members'of ,the screen formed preferably of channels,' with theirflanges directed outwardly 'at'one' end of the screen is acast member 3 secured to the ends of the channels by bolts 4, and at jacent ends of the channels by the bolts 6.

screen is adapted to be positioned at an inlhescreen is ada ted to beistatidnary.

The cast mcmh nated as a foot casting, has the web 7 extending substantially: at a right angle with the face of the screen; adjacent the upper end' of tioned a spacing bar 9 extending transversely across the face of the screen, and having a re- In theupper face of "said spacing "bar 9 threads or depressions 1 1 are provided, which are" adapted .to receive the wires forrmng the 'placed transversely, an anchormember or screen are adapted to be given aturn to anupon the shelf 12 at intervals, and are provided with recessesadapted to receivetbe anchor bar 13, the latter beingfheld. snugly against said-brackets'by the tension of the screen wires. At the opposite end of the i ated the head casting s p'rovi edwith t e Web 15, preferably positioned at an obsecond web memb'er'lfi, preferably o'si tioned at a right angle with the face of t e screen;

recess 18 which is adapted to engage the web threads or depressions 19 forre'ceiving the the same. The spacing b'ars9 and 17 are rethe same to embrace two faces'pf s castspacin same cl parent that if the wires be loosened, said or 3 which may. be desigbar-13, around which the wires forming the chor the same; brackets14' are positioned.

screen the cast member 5 which ma be des- 'lique anglewith the face of the screen, and a.

' adjacent the upper end of the ladder is mounted a spacing bar 17 provided with the i 16 snugly, and having on its upper surface,

wires and preventing lateral displacement of ings, and also ,b the wires passing over said. bars -an by their tension binding the osely agamst said castings. It is apspacing bars or either of them may be 're* member appropriately secured to the ad The two channels and the two end members form the frame of the screen; when inuse, the i cline so that clay thrown thereon willtend to move downwardly over the face-thereof.

.this web is an extension 8 upon which is posicess 10 there1n,.wh1ch.1s adapted to engage .thoiupper and a side portion of extension 8,

whereby the same is firmly seated thereon.

screen and hold the same against lateral displacement, The foot casting '3 is also pro- .vlded with a shelf member 12, upon which is movable, and are held in place on their re- 7 spective castings by the depression arising,

56 the other end of thescreen is a second castl'hoved and other bars substituted withouta-" iq T This will be explained extending transversely of said segmental portion. The center of the circle of which the segment 20 is a portion is coincident with the head spacing bar 17, whereby, necessarily, {)he slots are e uidistant from said spacing ar. nermends and having threads 25 adjacent their outef'ends, are ada ted to be inserted into the said slots radia ly,, with the hook portion lying transversely thereof. I The ook is of suc 1 length as compared with the height of the slot that it cannot turn therein, but must always lie flatwise or 'sidewise' in said slot. and the nut 27, and as the lattentravels in- Wardly on the threads, the bolt is drawn outwardly, and vice 'versa. In. this construction, therefore no individual holes are pro vided for the'bolts, and the latter'are positioned side by side and may be moved laterally through the slots; itis therefore possible to use as many-or as few 'bolts as desired. It is apparent that in a screen of coarse mesh, fewer bolts would be needed, while if finer wire is used, more bolts would berequired, and this provision of transversely ext-ending slots makes it possible-to adapt my screen to the use of either fine or coarse wire if desired.

If individual holes were provided for the bolts, thesame degree of adjustment to pro- ,vide for different sized wires would not be possible.

, The de th to which the bolt penetrates the slotis t erefore regulated in the mannerstated, and. for the purpose of exerting a greater or less tension upon the wire which? may be secured thereto as shown in Figs. 2 an 3. Selectingany wlre, as 28, It. is seen that one end thereof is secured to a bolt 23 as appeal-sin Fig 4, isthen passed over the "face of the spacing bar 17 I in one the threads 19 thereon, and drawn longitudinally across the face of the screen over the spacing bar 9 at the lower end thereof, being positioned in a thread 11 thereon, and then" led around the anchor bar' 13, and backbver the spacing bar 17, and then carried to the adjac'ent bolt 23 .to which the end is secured.

\ ()ne wire therefore, furnishes twostrands of The latter being formed onQthe radius ofPthe circle 'of which the head spacing bnrjisthe' the segmental portion time headfcastingl center, all of the wiresused informing the screen will be substantially of the same Bolts 23 aving a hook 24 at their in Each bolt carries the Washer 26' quickly.

the screen,'and'hoth its. enids are' secured in length, thereby rendering it unnecessary to previde wires of different lengths for use in thls screen. This is a matter of convenience and, economy, for the reason that if one'of the wires is broken, another wire may be readily substituted therefor, and assorted lengths need not be kept in stock by the operator. Proper manipulation of the nut will cause the wire to be tensioned to a greater or less degreeas desired, and the same wire may be tensioned by the manipulation of two bolts, thereby rendering possible a very delicate adjustment. Further, if it is desired to remove the spacing bars and replace them by others, the wires may easily be loosened without detaching the same from the bolts,

therewith by the tension created as aforesaid, and also operate to hold said anchor bar in place. Therefore the complete removal of a wire is easily effected b taking the nut from th'ebolt, ulling the bolt through to the inner side of t e slotted segment, and twisting the hook out of the loop of the wire thereon, whereupon the wire is freed and ma be pulled over the face of the screen wit out any difliculty, and it may be done very- Hence, the. removal of one wire and the substitution of another therefor, can readily be performed; this is a matter of importance, for instance, whena wire of a dif ferent mesh is to be substituted, or a wire has been broken. Arranging the head casting in an=arc form also renders it possible to use any of the wires at any portion of the screen, thereby preventing 'any inco'nven-l ience due to the confusion where wires of different lengths are used. Further, itis to be noted, that the individual wires arepo'sitioned and adjusted independentl of the others and are independently remova le; that the wires are arranged in sets or groups secured 'at their ends to th'e bolts lying in a vertical plane on an arc,'ai1d that as many of such sets of bolts may be provided transversely of the segmen tal port1on of the head casting-as the space will permit and as may be desired.

My improvements render it easy to change themeshlof the screen, or a portlon thereof, when desired, so that'the mesh maybe finer in one portion of the screen than in other v portions or all of the wires may be removed as shown and wires of a different size substituted, thereby adapting the screen to differcirt'clays. The advantages and'econom'y of such construction are evident. Further, the

repair o'fthe' screening surface of screens has heretofore been not onlydlflicult but 'expensive. whereas, 'ivi'tl 1 *-in y improved construc" tion, the necessary1epa1rs can be quickly,

is y ,directlyb'y thewiresthemselves. H e For the purpose of assistingthe'screenin i its operation and of .j cleaning; it and freeing I tends downwardly and has secured thereto a mentalportion of. the head casting and acts asv a protection for "the end fastenings from the play which is dumped on thescreen from} ,the eleyator'ythis rplate may be made reand very little 0 with one arm' 33- extendmg forwardly be-. neath the" screen, and at the outer endftheremove leaso thatat any time readyaccess to the wire fastenings may be afforded. This platereceives the impact of the falling clay,

,thereb relieving the wires, and'the cla then.

over the face 10f the at ter, the shock incident to the f' delivery vofthe clay from the elevator is felt.

said' framefaround which said wires are led l es wnwe y.

it from particles which may, have become lod ed thereon, I provide a vibrator device, which is, adapted to; strike the" wires from heneath at intervals, therebyitending'to shake loose any lodged particles, and also expdit theprogress of the clay over the faceoi' the screen. ;At :32isfrnounted a bell crank of is mounted a bar 34 which extends transversely of the screen wires and beneath the same; the other arm 35 of said bell crank ex spring 36 the latter having its other end se cured inthe adjustable member 37. Mounted suitably in' the bracket 38 secured to the 'sidechannel of the screen frame is a pulley 39, which maybe connected with the elevator by a belt, not herein shown; said pulley contains the laterally extending lug 40, which is adapted, upon the rotation of the pulley, to contact with an arm 41 mounted rigidly upon the shaft 32 and projecting into the path of rotation of said lug. As the pulley is rotated, the lug 40 striking against the arm 41 will set up a rotation of the shaft which will retract the-bar 34 from the wires, at the same tlme extendi the spring36; after the lug has passed 0 the arm-41, the contraction of the spring will give the bar 34 a sharp upward.

movement, thereby bringing the latter into contact with the -screen from beneath. A vibratory movementwill thereby be set up in the wires, and it will be repeated by the subsequent actuation of the ar 34 in the manner described. In this way sharp strokes will at short intervals be given to the wire screen from beneath which will tend to facilitate the pas'sa e of the clay downwardly from the -screen an will alsodislodge any particles which may. have become stationed between the wires.

Sides 42 are provided for the screen, and are positioned upon the upper faces of the channels 1 and 2, by angle irons 43, the latter being riveted to the sides and. to the upper flangepf the channels.

, I claim:

1. In a wire screen, a frame, wires arranged thereon having both ends positioned at one end of said frame, removablespacing barsi'or said-Wires mounted on said frame,

' an anchor member atkone end of said frame about" whiohfsaid wires are loo ed, and indlvldual means for securing eac end of said.

, ,wires andtensionin'g the sameat, the end of ,ra'ngedlongitudinally thereon having'both ends positioned-at one end of said frame, an'anchor. member at the opposite end of without being secured thereto, means for maintain" said anchor member in lace, andindivir ual means for securing each end of awire and tensioning the same. '3. In a'wire'screen, a frame, afoot casting secured to said frame, an anchor member mounted on said foot casting, a head casting securedito said frame and having radialslots therein, wires arranged onsaid-frame, means positioned in said'slots for independently securing and tensioning 'said wires, each wire having both its ends positioned in said head casting and forming a loop over said anchor member;

4. In a wire screen, a frame, wires ,ar-.

ranged thereon having both ends positioned at one'end ofsaid frame, a head casting having a portion thereof forming an are, a spacing bar positioned approximately at the center of'curvature of said are, anchor means for saidwires at the foot end of said frame, and ,adjustable and removable means arranged radially in said are shaped portion of, said head casting for independently securing and tensionin said wires, ,whereby said wires may each be same length.

5. In a wire screen, a frame,- a head casting thereon having a segmental p'drtion, a' spacing bar arranged approximately at the ,center of curvature of said segmental 'portion, a second spacing bar arranged at the opposite end of said -frame, an anchor member arranged at saidfiopposite end of said of. substantially the I frame; wires of substantia ly the same length arranged on said frame, each wire having an end securedin' said segmental portion and pas ed over said spacing bars and around said anchor member, and returned over said spacing'bars and having its other end also secured in said segmental portion. 4

6. In a wire screen, a frame, removable spacing bars thereon, a removable anchor member thereon, means for maintaining said anchor member in position, wires of substantially the same length arranged on sn id frame and having both ends positioned at one end. of said frame and forming a loop about said anchor member and engaging said spacremovable means radiall I ranged thereon having both ends each end of each wire. and 'tensioning the ing thereon ha ng a'portion thereof formed on an arc, transverse slots arranged in said head casting, win s arranged on said frame, y and transversely positioned in said slots for securing each-end of each wire and tensioningthesame.

In a wire screen, a frame, wires arositioned a re'movahle anohor of said frame, about at one end of said frame, bar at the opposite end Y which said wires are looped, means for. mainfor securing each end taining said anchorfbar in place, removable means ad ustable radially and transversely and for tensioning the same, whereby each wire may be separately war -m lilting the frame withou't disturbing the remaini VWII'GS. y a

rotating said pulle said arm With wh ic its rotation, whereby ltion is imparted to the of each of said wires removed manipu- I the 'securing'imeans, at one end'of 9. In" 'a Wire screen, a st ationai'yl frame,

pulley mounted on said; pulley engages in said arm-is intermibe tently caused to strike said wires, and means for mittently actuating said arm to l a vibratory mostrike said wires, wherebF f l atter orceaning.

said screen;

v an arm pivotally lntestimony. whereof I aflix mysignature in the presenceof two witnesses.

, CARL Witnesses: v

G. A. GmsoN, I I E LIs Lovmor.

B.HARROP.I

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