US1202374A - Screening apparatus. - Google Patents

Description

G. H. FRASER. SCHEEMNG HPM/wus.

APPLICATION FILED JUNE l5, |906- RENEWEU DEC. 2F, 15H5.

Patented Oct. 24, 1916.

5 SHELTS-SHET 2A n (5/ ima;

,'INVENTOR f "ry G. H, UNSER. SCHEENNG APPARATUS. APPMCMIQN man lum I5, woe.

RENZWRD UEM. 21,1915.

WITNESSES:

G, H. FRASER.

SCHEENNG APPARATUS. APPLICATLON men :unf i5, 15406r RENEwED 0m27.191s.

PHJGIIH (ict. 24, 1915 5 saen-SHEET 5 WITNESSES:

GEORGE HOLT FRASER, 0F NEW YORK, N. Y.

SCREENING APPARATUS.

Application illediJune 15, 1906, Serial No. 321,856. Renewed December 27, 1915.

l i To all whom t may concern Be it known that l, (literair: l'loL'r Funsnn, a citizen of the United States, residing in the borough of Brooklyn, county of Kings, city and State of New York, have invented certain new and useful Improvements in Screening Apparatus, of which the following is a specification.

This invention relates to screening appa ratus, and especially to apparatus of this character in which the material to hc screened or sized is allowed to tion4 down an inclined screen through which the smaller particles fall to a linesl outlet, and over `vhith the larger particles flow' to a coarse or tailing outlet. Apparatuses of this kind are used with one or more inclined screens, either stationary, vibratcd, or jai-red, inclosed in a casing, and used with a distributer for spreading the material to he screened over thel upper part of the screen.

My invention aims to provide various improvements in apparatus of this general character, which will he hereinafter more fully set forth with reference to the accompanying drawings, in whichligure l is an cnd elevation showing the preferred form of my invention: Fig. 2 is a rear elevation thereof partly in vertical longitudinal section on the line Kw2 in Fig. l, and looking in the direction of the arrow', Fig. 2% is a vertical cross-section thereof cut on the line 3-3 in Fig. 2 and looking in the direction of the arrow, and partly broken away; Fig. l is a fragmentary crossscction thereof cut on the line 4 4 in Fig. l and looking in the direction of the arrow; Fig. 5 is a cross-section thereof cut on the line 5 5 in Fig. l anu looking in the direction of the arrow. Fig. G is an enlarged fragnuntarv section ot the body eut on the 1in@ (iA-J3 of Fig. 7 and looking in the direction of the arrow', Fig. 7 is an enlarged fragmentary section thereof cut on the line 7 7 in Fig. G and looking in the direction of the arrow. Fig. 8 is a fragmentary Vertical section looking from the rear and showing the distributer reversed, and Fig. 9 is a vertical cross section showing a modification.

Referring to the drawings, A is the mam body, B are its feet, C are its legs, D is the feeder body, E is the hopper, and F is the Specification of Letters Patent.

Patented Oct. 24, 1916.

Serial No. 68,919.

driving shaft. Within the body A. is a' screening member G, beneath which is the fines outlet Il, and in front of the lower end of which is the coarse outlet I. At the top of the screei'i is the inlet J, ahove which is a conveyer or other distributing feeder K. The material entering through the hopper E is rlistrihutcd by the conveyor K throughout the length of the inlet vL from v. wich it flows ou to the sf'rcen (i, down which it runs, the lines fallinrr through and escaping through the tine outlet ll and the coarse fiowing down and passing out of the coarse outlet-l. .XS thus fait' rlrsr'rihetl the parts may be 0f any usual or suitable construction.

According lo the preferred form of my invention. I provide an improved construction for the main body A, the feeder D, the

screening member. and an improved vibrat? ing mechanism L, and I provide various de. tails of improvement 1n construction, ar-` rangement and operation, all of which Wifll he more 'fully hereinafter set forth, 4 .4

The body A consists of a tubular casing of substantially rectangular cross-sectio n, closed at front` by a front door a, which slides or is adjustable-vertically in grooves formed in the body, and at rear by ,a hinged rear. door which body has an open top beneath the feeder, and an open bottom at its front end for the outlets, and is pivotallyf mounted on its feet B at front by pins c or otherwise, and ad]ustably connected to the legs C by pins d or otherwise, so that the angle of the body can be set at the degreev of inclination desired. The body A ispreferably composed of two identical ends e of cust or other metal, united at their lower front part by a cross-piece or angle` bar f, at the lower part of their rear ends by a bar g, at top by a cross-piece or angle `bar It at rear and z' at front, and at their lower fronti end by a cross-piece or angle bar j, which connections preserve the two sides in' suitabbe relation. The top and bottom sides of the main easing are preferably both closed by removable walls or covers, thel top by sheet metal covers Z which have edges renforced by angle irons m at bottom, and by Z-hars n at top, which are fitted together at their edges to hold the covers nplace `cloiiing thi rimimembers? Him 'tuti liv :ing

vers, and above tho cincrs i1 correspondg angl(- biir u iii oiirrioil by the casing, to

i lich bars the adjacent ifilgifs' of the Lovers E i littod, By this coiintriiution iiny cover may be easily riinoveil to grt :'ioooss to the screen member from in l'i-oiit. At Cach ond @zich covffr i5 :ih-o ci; nipwl by' ii, swinging clamp y) pivote-il to tho viiil iriill e.

Tho bottom ol' tho main body is ii inor :iblo or renioriiblo iloor M :iccoiiling to my iniontion= :inil preferably uoiisaistfi of, ii me talhi; fisnni.` N roinkposicil of upwardly exA tending iingh biirf 'q i'niiiiiciictl zit top by zi T-biir r :ind :it bottoni h v un :ingle bair s, and isiirryng; :i iihiixi: inruil' iroicriiig ii :and w or bottoni wiill of the lioily. Tho door Nl priefilriil-lilits 'within tho @nil walls iiiiil in' iliiotifil tliiirito neiir its hiv-'er ond by this pin f .Lio i nit ith' iippifr cnil min he rswung iloii nir-.willy to ne across to the intrrior from th rear. lt maken suitably tight coiinvution with thi?A vnd Walls by' contact of its frnnii- A ith ih@ shoiihler u theroin and withthe bing by ifontiict 0f the. bin1 1" therewith ziriol it is hihl in thu. olor-iwi position iii iinvil wiiitiibli inniiiiiir, :iii by the gir-ir iti' :flaimph /f with whirl; thu vtop :iiiil bottoni ligen of (hij: rnil:`r w im'` pro iilil` ll hie miler 'i'.iiai; of rinzii enii i. in int-ei with ii thing@ if fitting iiggiiinfit thi# inner l'iicu of the` lQi-t ll :it the lower rndr` nini the inner fiice ol' the leg L at. thv upper enfl, :nid with lugs y for (ounce-ting theY feeder to these ends, anil with oars a for carrying the clumps.

The borran lriii'nhiii G is prefrriibly inniiii'icil on thv inoiiiblr liiwl M o hui i( iiiiii i ioiiifii'rl irr lfl rrd n itl thi; hiicii for ,Qiriiig iirofn tif im jcrwn. ,lli ifniii br iiioiiiii-uil ilrzfitlr 0n tht-lirlme N ii iipri-V wr io Support it. movlvlj or yikiliifiitiy thorn-:iti by yielcling Gir eledimlly oi ro f-il-rni.; imOLntcl frame i@ Lliifirifl 'troni thi` linini,` N by ulmfic or iiiwi'iiint 'springs nir# i pcetr in proviilw .i plurality n Nomi 'ou thzizii unil on ihr wmliinglos n hinil tho frame I cnnsiti': of ii number of iiifii'ieii Clmiinel bin-.Q L eiailufiriiiig thi: upper oriilif of tiir qpringf :inl hiirrigi eli-i" mils conliiyzfi oiol'irrifnig; pig-fit c" :it

. the top and bottom of thehiirri a' forsldinglv supporting tho screen friimiA Tho lamps R botwoen the screen members (l nro shown :is i-iioh ionsisting ol' :i Straight bi1 i' e of siriip iron izonnictoil to the l'riiino l" by 1i bolt f', :intl over oiiih bur thi ifhinip pons-ists of iin inroitoil :nigh: iron (1. The` bolts f may go through thc huil' lwiring,l (Q, to rotiiin thifso in pl:ii'(. Thil, iippi-,i' i-nil of mich :siii-vien inrmbor (l hais :i iloirniriii-lly projri'ting por tion /t which hangs on thv siti-wn Vl'riiino l. The rSiroiln nniy be siilliifivntlr rrniliint to bi: iiio\iiil,ji ilti1il or ribriitiil in :in v iisiizil or .Qiiitiibhy wur, but l pioi'ir to imL the \ilirntoiii li irhiifli ironsiit of :i ,iliiriilitlir of (hnrniiiirdl'i' acting iinpiiift iiioinbrrs iii' ranged in triiniors'ii rows both-non sind iipnoifil iipiirt froin th(- siilon of thi` riisiiig tiiiil disponi-,il iibow` tho longitiiilinil cflgles of the fici-oriisiiiiil oppohito or in ihn plinioy ot' tho Springs :if: tho lnioi'lirs i loosely or oliisiiixilly ionnmftvfl by spring :irins j :intl holili-rs In'. iiiih .Lshiifts Z' whii-h oxtrnd throngh briiiingrii in ihr vini mills f :ind iirie osrilhitoil by :irni m. irliirh ari? ronnffct-iiil ngijulhir by :in :iiljilitiibh liiili n :mil :1ro i-oi'inrrtul bi' :i liiili: o' to the Strap y' of :in ori-nutrir H flriwn from the Shaft l". Thin i-iri'iriiiirii' ln si :i throir` snlliiiont to mulino thv linoifli'ers to more slightly farther than iiiriziSiiry for thriii to 'hit tho clinnps ll over ,nini opposite thvy li'ingitndinnl edges ol' the screens, so that the linockers hitthose @linups n Siiitiiblu pirciissiic or impnctivo blow, :mil thv @liiStic heirs j' iiuhl snlliciontily to make np for :in r :iililitioniil oscillation olf ihr hnorlrir Shafts. The rosiliontly minimized or priiii inoin'ilcil Siriiin from@ iniivv )'iehl f-fiLhily iinilrr thn: bloii', so thiit tho Screen Nothing thiirron will be jiirreil bythe blow ii iiill :lightly inorcd thm-oliv, This;l jin'- 'i @j will iii ,tiiiliizii-:ii to presint ilolggingol" ilniwii-"iii liiiil to liifililiitr ilowniriii'il (lov il niiilrriul ihirvorni ii-wilnitgi l'il'wiin thi' viiil wzilll i iiiiil thi- ;ndc bars' k 0lt thi si; riijn lriiini` mir br prixxi-nto! ii: ini nwml ir siiltnblo iiiiiniiir.y biit ,l pri her ti. iwt thiinnnr faire of thiA @mi u'. iiiiil to inoiint on 'tliig Jln4 `inil in il' pofniiit ii ,iiihlinfr ilii= t bnr or pinto 'l'` ii: i-h nini' lio r-hnnp l iiiliiinist ihr iinil iinll with iin iniirioning parking whip. or inii'r ii. Spi-sing' or pieswi! oiitfv imiiillil 'rnin ihiA will in olii-h nizinnii :in` to You: ipi'int lhi- :iih nt' tho Sewon l'i'wnio :iiiil pri-int h-iilnig zit thiS point, biitwhich is iii'ili\i':illlr ii hprinif pressed bar sliiliiigly inonnicfl in tho pochi-t :is shown.

f'l l ii inhit. ,l is directly above the :ici-cons, iinil pivtrrably consists of two removiibh: ilofh-riori thv ono ll being inclined dowiiwiirdlv un: lin imiilly nfl rifting on :inil hippinig tiliitop o'l' tir' screen for :i sii'itiiblr` ili\i.ni';iie, :init 'fi nthii l" boing inclined donnii .willy in iciivii-wiiilly ind terminating :i :miiiibhi i l he trough Y distance above the deflector U to give the necessarv clearance for the inlet J, these delict-tors being so disposed that feed from either the rear or the front side of the feeder will he directed llownwardly and forwardly on to the top ot the screen. The deleetors are removable through the feeder easing, and are carried by a t t iron carrier lV bolted to the inner tace ot each end wall e. This carrier has flanges r projecting inwardly from the end walls to prevent leakage past the ends of the doth-eters. which flanges are notelu=l 1uar the bottom to permit the dei 1 to pass downwardly, and are profiector l, vided with a curved wall s for directing material on to the del/lectin- U. The hack oit each carrier iV is recessed to clear the dust` plate T. and the lower corner overlaps, and prevents leakage at. the side edge of the screen. and is recessed or notched to clear the screen.

As shown the feeder or distributer is bodily ieviirsihlc to bring its hopper at either end. Vlts casing comprises two cast metal end walls X eonnerted by angle irons closed at the top bj' :i sheet iron top wall u from one extremity to the hopper E, which latter closes the remainder of the top1 closed at front and rear by doors e', and removably bolted to thc top of the body A. The distributing conveyer K is reversible both in position and drive and extends from end to end oi' the feeder casing` and beneath the conveyor the feeder has a trou'gh Y flanked on each side ol the conveyer by an adjustihle .feed plate Z. which mounted to be tilted to the neoessarjY angle to anse the material distributed hy the con veyeixto low out ot' the trough in substantially uniform quantity thrcaighout its length.

Nv invention provides a feed edge. pret"- erahly au adjustable plate at each side if the eonveyer, and a ciearanee or discharge outlet at each side, so that the conveyer may discharge to the front or to the rear desired. according to the direction that it is driven, thus avoiding the necessity for reversing the feed hopper or for using a left hand conveyer. is a plete having uj'iwfirdljY lient edges, and is supported from lugs within the casing l) by two transverse angle hars, or is otherwise suitably.constructed, and has inclined sides to `which the feed plates are applied. The end plates X are termed with correspomlingly inclined internal flanges w' for supporting the trough, and 't'eed plates en the lower ends of which flanges are lugs for the angle` bars support ing the trough.

The eccentric S luis .-1 shoulder against which the eccentric strap p bears, and on its outer end the eccentric is covered with a dust plate al' which protects it from dirt. The strap is provided with an. oil well, and each of the bearings are likewise provided for lubrication. The bearings y for the driving shaft F are spaced apart at 2' from the wall to permit any dust which may escape from the feed casing along the shaft to fall do'vvnwardly instead of entering thebearings.

rl'he feed hopper Vli) is formed with a depending lange u at each side to prevent material from jumping across from the hopper directly over the feed board, and with a vertical neck b2 to direct the feed downwardly on to the con veyer. The legs C are formed with a plurality of holes c2 through any of which the bolts d may he passed lto support the body from the legs at the desired angle. lCaeh end. piece c is formed with a projectii'igr ear d2 which laps the side wall i.' ot the bottom door M, and has a curved edge struck from the center ot the pivotal pin t. and the louer edge of the side wall n extends ont under the projection d2 to prevent leaiige beneath the latte1 at the sides.

The angularit. -f the screen G is fixed relatively1 to the cody. and its steepness is adjusted by adjusting the entire body until the desired angle for the screen is obtained, but I prefer to construct the bottom M ot' a greater steepness than that of the screen in order to insure free flow of the screened Ina Serial, which owing to its fineness is not likely to liow as freely as the coarser material.

The posts c will project in the direction in which it is desired that the yielding frame P shall reciprocate, and are formed withv slots g2 through which are passed bolts k2 in the ends ot' the frame P.y which bolts act as stops to arrest the upward movement of this frame, while permitting it to freely descend when the springs are compressed. Thus the frame P slides up and down on the posts in its movement under the action of the mechanism L, and is abruptly stopped at a predetermined point in its upward movement. The etfect of this is to permit the material on it to rise and to jar out of the meshes ot the screen any pieces that may have wedged therein.

Then an end motion or ltnocit tor the screen is desired, this may he attained in any suitable manner, but I prefer to put a cam i2 on the lower side of the oscillating arms, and have it run against a roller fastened to the adjacent end dust bar T, and passing through slots in the ends c, and to provide springs ft2 for pressing the screen toward this roller. The rollerrides up the bevel of the cam and compresses the spring. and when the roller passes to the opposite side of the Cam, the spring presses the screen back until its roller strikes -the cam., thus giving it the desired moven'ient and jar transversely of the Rowing material. To provide for this end motion, the internal any of the parts, and one in which the mere Shifting f the feed hopper from one end to the other suffices to adapt the machine for receiving feed at either extremity.

It will be understood that my invention is not limited to the particular details of construction, combination or" parts, or imethod of operation herein set forth and shown as constituting its preferred form or adaptation, since my improvements can be availed of in whole or in part according te such modifications as circumstances or the judgment of those skilled in the art may dictate, Without departing from the spirit 1,5 of my invention.

'When it is desired to jig thescreen frame instead of knocking it, I connect the frame by a yielding connection to the oscillating shafts, and provide stops against which it Aim strikes on its upward movement, and I make this movement such that the screen moves both upwardly and forwardly in approaching the stops. In such case I may use spiral springs instead of leaf springs, and extend a bolt through these springs, using the head of the bolt for the stop and connecting the rocker arms to the screen by a link and spring connection, which will yield to supply the desirable lost motion. l. may' alsoV in Such a construction usel the knockers, disposing the parts so that as the lifting arm raises the screen the descending arm will strike it, thus combining both a jig and a knocking eil'ect. One such modification is illustrated in Fig. 9, in which the screen frame P is supported by spiral springs Q, from the door M at the top and the angle f extending between the sides c at the bottom. Bolts p3 extending through these springs position the parts, permitting necessary movement of the screen frame P. A link Q3 hinged to the screen frame and to the bar f causes the frame to more rearwardly slightly when it is depressed and stop or shoulder c limits its upward movement.

The oscillating holders mounted on the Shafts l' are loosely connected` to the screen frameI by links m3 which are hinged yto the :frame and movably connected to the 50 holders so that when the holders oscillate 1 they will act through the links alternately to depress the frame. The swinging Strikers i3 are here shown as lniving their arms j hinged to the holders ,t3 and yieldingly pressed thereagainst by springs `n3 on the links m, which springs provide a yielding connection between the screen frnmeand the oscillating shafts as well as servinglto impel the strikers to swing with the holders 607s While permitting them to yield if necessary on striking.

, While I have herein shown and described ,the feeder und distributer set forth, the same is not claimed in this application, being the subject metter of claims in my application Serial No. 82,750 of 1915 led March i', 1916 Serial No. 33,464 of 1915 filed June 1l, 1915 which is n division of the present application, and. Serial No. 33,1135 of 1915 iiled June. 11, 1915, which is a division of a companion application.

1. In a screening apparatus, a vibrating inclined screen, in conihinntion with an adjustable casing for it having a removable inclined bottom supporting said screen and detachably connected to the casing at its upper end.

A vibrating inclined screen, in combination with an adjustable casing for it having a bottom wall of greater inclination than the screen and movable downwardly to give access to the screen.

A vibrating inclined screen, in combination with a movable easing for it having a pivotcd bottom of greater inclination than and supporting said screen and hinged near its lower part.

l. A movable inclined screen, in combination with a casing for it permitting its downward movement, and oscillating striking means comprising impact strikers above, actA ing toward, and independent of said screen and within said casing and between its top wall and said screen for vibrating the lutter.

5. A vibrating inclined screen and means positioning it, in combination with striking means comprising spring impelled swinging hammers above, acting on. and independent of said screen for vibrating it, a revolving shaft for driving said .striking means, and a driving connection between said `haft and said means operating the latter from the fornier.

(i. A movable inclined screen, in combination with a f, sing in which it is downwardly movable. springs within said casing supporting said screen therein, and an oscillating shaft within said casing above said scri-cn. means operati-d bj.' said shaft and comprising swinging impart hammers acting on the upper sidi of said screen for vibrating said srrocnJand a rover for said rneing above and inrlosiny' said shaft and `said means.

7. The combination with an inclined vibrating screen and n stationary casing inrlosing it, of means closing the spare between the edge of the screen and the side nails o'll the casing.` consisting of a viebling plate carried by said Walls and pressing against the rdge oi" the screen.

S. A movable inclined screen. in combination with n casing for it having a movably mounted yielding screen frame having a phirality of parallel screen tracks disposed in a common plane, removable screen members shdmgly fitting said tracks and clamped said frame. said frame.

thereto and carried by and means for vibrating 'is arranged and jarring inechan isir.

9. The combination with an inclined renun'able screen. ol spring iinpelled impart strikers or hammers above and acting,r on said screen tor imparting permissive morcnients thereto.

lt). 'In a screening apparatus. tlicgcasing. an inclined spring supported screen therein. oscillating' shafts within said casing. a distrihuter above said casing. a dririnpr shaft therefor. a connection between said oscillating shal'ts and said driving shaft for oscillatini;r the former. and yieldingly impelled swinging;r knocliers above said siireen operated by said oscillating shat't.

1l. In a separator. the combination with a casing and with one or more inclined screens removably mounted thereon. of a jarring mechanism for iibratingdhe screen clothing.y an inclined removable floor or hottoni beneath the said screen er screens which latter may be inserted in place or removed when said removable floor or bottom is od 12. In a separator. the combination with one cr more inclined removable` screens. o1' a casing inclosing said screen or screens. said casing comprising an inclined floor or bottoni beneath said screen or screens and which at a Steeper angle than. the said screen or screens, said bottom haring a door or removable part which. when rij-:ucd or removed, allords access to said screen or screens and permits of their convenient removal. i

13. In a Separati'ir. the combination with a frame or casing and one or more incline( screens remoiahlwv mounted thereon each comprising a rectangula r trame and screen clothing stretched on said traine. ot means beneath the inclined sides ot said frame or trames resiliently supporting the. latter atv the 'downwardly extending' edges thereof, above said meansl acting pei-russiveliY downwardly toward Said screen in the vertical plane ot said resilient supporting means. j

14. 1n a separator, the. combinatifa with a frame or casing. of a plurality of removable inclined screens therein each comprising;r a rectangular frame and screen clothing stretched thereon. resilient supports for thc adjacent edges ot two ot Said screens.Y an means for percnssirely jarring said screens.

15. In a separator. the combination with a frame or easing, and a` plurality of removable inclined screens therein each comprising a rectangular frame and screen clothing stretched thereon. resilient means snppcrting adjacent Aedges ot two ol .said screens, and means opposite adjacent edges of two of said screens for 'jarring them.'

16. ln a separator. the combination with a frameor casing. of two or more removable inclined screens dlspoa-.ed in parallelism and each comprising a rectangular screen frame and screen clothing stretched thereon, of

vcussively jarring means opposite adjacent edges ol" two of sai l screens for jarring them.

1l. ln a separator. the combination with a traine or casing and a removable, inclined screen thereon conilnising ,a rectangular screen traine and wire mesh clothing stretched thereon. of jarring mechanism betweenremote from. and spaced apart from` the sides of said casing and opposite in acting' on the edge of said frame. for persaid screen at a point or points intermediate ot' the sides ot said casing.

1S. ln a swparator, the combination with a frame or casing. and a pluralityY of removable inclined screens therein each comprising a rectangular .sfreen frame and screen clothing: stretched posed in parallelism in said easing with adjacent one to the next.. oi' means opj'losite the adjacent edges of two of said .screens for preventing leakage between thein. means resiliently supporting said. screens. and means for percussiveljv jarring.Y said screens.

19. ln a separator. the combination with a frame or casing'. and a removable inclined screen therein. ot' a plurality of springs between. reinotc from` and spaced apart from, the sides ot' said l'aine or casing, and diS- posed in a row transversely of said casing, beneath said screen and resiliently supporting the latter, and a plurality ot' jarring devices between. remote from, and spaced apart from. the lsides of said frame or casing ior percussivelv jarring said screen disposed in a row transversely of said casing opposite said row of springs and cussirelj' tow-.1rd said screen in to the stress of said springs.

Q0, ln ascparator. the combination with a traine or casing. and a plurality of remorahhl inclined screens therein cach comprisingr a rectangular frame and screen clothing! stretched thereon. and disposed in parallelism in said casing. of a plurality of parallel hars or supporti.` mounted in said casing opposite the adjacent edges of said screens. springs mounted on said supports unl resilientlj' sustaining' the edges of said screens and eaertin;4 an upward and forward stress for resilientlv supportingr the edges of said screens` and jarringr mechanism actingr toward the edges ot said screens percussirely reverselj' ot' the stress of said springs for jarringr said screen clothing.

2l. ln a separator. the combination l,with a traine or easing. ol a removable inclined thereon, and disopposition screen therein comprising a resilientlj,T mounted reuiorahlc rectangular oblong! acting` perlos l toward the upper side of, the longitudinal edge of said frame at spared points intermediate of its extremities.

1n a separator, the combination with a resiliently mounted removable inclined screen comprisingl a resilient trame or support and screen clothing mounted on the top thereof, and means for pereussivelv jarring' said sereen, of a easing within which said screen is resilientlv mounted having an inclined bottom wall` of steeper inclination than said screen.

2B. In screening apparatus, a resilientlv mounted removable inclined screen, in Combination with a easing' in which it is inelosed, and downwardly acting jarring means above said screen for vibratingr it. said casini;` ha ving,Y a detachable bottom wall spaced below and of greater inclination than the screen, and means resilientlf.T sustaining said .sereen above said bottom wall.

El. .\n inclined resilienlly mounted removable screen` in eombiL ion with means tor jarring said screen, anda easingV inelosingn it havilm4 a hinged bottom wall hinged to its lower part, and means resilientlyv sustainingT said .screen above said wall.

A resilientl)v mounted removable inrliued screen, in combination with an adjustable casingr inelesing it, means for adjusting the annularitv ot' said easing, resilient means supportingA the screen in :aid easing, stops or abutments l'or arresting' o p- 'ard movement ol' said `screen in said easing. and In ans for 1loivrwardlv jai ring said screen.

2li. ln a separano; the combination with a resiliently mounted renu'ivable inclined screen, and means tor percussivel)r jarring` it, oi a casina inclosing .said screen and haring an inclined wall or bottom beneath the latter, and means for supporting said screen within said casina' below aud opposite the edges ot said screen and above and spaced apart from said wall or bottom to atlord a passage or space above the latter and below said means.

2T. In a separator, the combination with a resilientlv` mounted inclined removable screen. and means for percilssively jarring it.,` oi' a easing' for said .screen harina' side walls and a bottom wall inelosing Said sereen. and supp-.atinemeans intermediate of, remote from, and spaced apartfrom, said side walls, and below said screen for resilientl)Y supporting it intermediate oi' said side walls.

2H. ln a separator, the combination with a resilientlv mounted removable inclined screen. and means for jarring1r it, of a easing for said screen having a bottom and side walls, a bar 'or member spaced above said bottom and extending transversely of said casing between said side walls below and sustaining said screen intermediate of said side walls and on whielrsaid screen is resilientlv mounted.

Eil. .ln a seliarator, the combination wiin a removable resilientlv mounted inclined screen, and m `ans for jarring!l it, of a main frame or casing on which said screen mounted, sustaining;` means within and diS- posed transverselyY of said frame or easing and below and salstainingil said screen intei-mediate ot its side edges, and means above said screen tor preventing leakage of material o\e1' the top edge thereof spaced apart from said sustaining' means and affording a space or chamber above the latter for reeeivinsT the upper edge of said screen.

'll. In a separator, the eombination with a removable inclined sei-een having a. downwardl)V and rearwardlyY extending part or member at the under side of its upper edge, of a frame or easing;r on which said screen is removably mounted having;v side walls at the side, edges of the latter. and means mounted on said frame or easing' intermediate of said side walls having an upwardly and for-- wardl)Y extending' part or member beneath and engagingT said downwardlyY extending part or member for sustaining said screen.

231. In a separator, a removable inclined screen, in combination with a easing therefor haringY walls inclosing said screen, means beneath the edge oi' said screen, and between, remote ltroni, and spared apart from, the side walls of said easing, resilientl),v pporting said screen at a point or points :ntermediate ot' said ,side walls` and means affording a stop or abutment for limitiingr upward movement of said. screen.

3Q. ln a separator. the combination with a removable inclined screen, and means for jarring it, ot' a 'traine or casinar on which said sereen is resilientlv mounted. a transverse bar or member mounted on said frame or tasiiucT beneath and siistaininnr the edge, of said sereen. and springs resilientl)Y snpporting' said screen. 4

33. ln a separator, the combination with a resilientlv mounted removable inelined screen, and a tranrl or easing on which it mounted. ot means extending traosverselv of said trame or casing,y at the upper edge ot' Vsaid screen for preventing leakage of materlal over said edee. and resilient means brlow the upper edge, of said screen ,for sustaining.r said screen, aid upper means and said resilient mean:` spaced apart to altord between them a recess or chamber for receiving the upper edge of said screen.

3l. In a separator, the combination with a removable inclined screen, and a frame or casing on whiclr'it is mounted, a bar or member extending transverselyA of said frame or casingr beneath and ristainin;r said screen, and a spring or springs resilientlv supporting said screen.

35` In a separator, the combination with the vertical plane ot said row of a removable inclined screen, and a casing hin inf; elite and bottoni allev inclosing said animan. ol' ine-ans talow tinJ lower part ot will 'reeu anll Anietaining; lla latter1 .spaced alan e; the liottoin wall ot -Qaiil canina and at. fouling a space or lni..-a; fo latin-ath nifl nnaina. :ual a spring' or springe rrailicntl-v unimi-line said herren. 1

lll'. ln a separator, a removable inclined nerven. aint a easing' therefor comprising fr liottoin wall` in combination nith a har or nninliii niounleil on yaiil owing hclovv and ,einmal apart troni :will .e1-reen :intl aliove :ont spaced ai rt troni Saiil n'alh .ioil i spring or wrinefa lictn'een eaiil .screen and laid liar or nirniher reniliently Supporting; the former lioln the latter.

3i'. ln a separator, a i'enioiahlc inclined screen minimising' a rectangular screen lianir and a screen clothing stretched on the nouer eide thereof, and a trame or casing! on which it ia reailiinlliv mounted. in ronihinatii n with a liar or inenibei inoiinteil on the elige ot tho top Vl'aize ot' saliti screen clothing` an impact member above ain'l on positif the edge of said screen and acting iniiuoftivi-ly on Sai-.l bar or lneinber for jar lingor Said `ri-een, and means sustaining sail wen in Said easing'. i i

lle ln a separator. the combination with a rena i viali inclined VQereel'i, and a inning on whirh il` in reinoiabl;Y mounted, olf meansl extending transversely ot' said casing; above the upper edge ot' 4eaiil Screen for nrivventing' -leakage over such elige` and nA ansi at: they siile edges of Sani screen affordingy a reeeas above and Vlor reecivinL' such edgest'or pro renting leakage past the latter.

lili in a eeparator, the coniliination with a rcsiliently mounted removable inclined screen. of a traine or casing; on which Said.; ,screen is: inounterh and jarring mechanism acting on the Side edges oit' Sait] screen, co1npria-ing impact strikers pcrcusisively jarring,r said screen.

40. ln a separator, thc combination with a removable reeiliently mounted inclined screen cornprissingr a rectangular frame and a screen ,clothing mounted thereon, of a plurality of springs disposed in a downwardly extending row opposite and acting resilientl)v to Tard Said screen clothing, and a plurality of imnactive Yjarringr device',I dienosed in a' downwardly extending row in springsanil onlioaite Said screen clothingf :intl a Iting; pen eussively toward Said screen elution," in thi` vertical plano ot' the Stresa of Saii'l springs.

Lll. ln a separator`r the combination with a rcsiliently mounted removable inclined Screen, of a casing having an inclined hottom wall and in which said screen is rev movablv mounted` a bar or member beneath Sairl screen and extending transversely of said casing, spaced apart from said bottomy wall to all'ord an outlet for tine material he neath it. and spaced apart .troni they trout of aid casing to all'ord an oath-t l'or coax-Se material in front fil5 it, :unl Fnslainine sait svi-een to ifierinit ria-iliont vilnation ol' the latter` and niezina above eaiil Hrricn lor iin- ]nli'iil'ily jal'l'ing it.

l2. ln a separator, the combination ivith :i resilient removable inclined Screen. ot' a easing' in which saiil screen is mounted having' an inclined bottom wall and side nails, means within said taining intermediate ot' saiil side walls and spaced apart from Said lioltoni wall beneath andV sustaining thc npner edge of said screen, und a'll'ording a passage beneath said means, and above said bottoni 1wall past the upper edge Ot' Said Screen tor connnnnicating with the 11e-ath the latter.

43. 1n a separator, a removable inclined eci-een, in combination with a caeing therefor having eide and bottoni walls and means disposed trai'ievere ly ol' :laid casing helon aint spaced apart Arom the upper edge of l1aid Screen and ail'oiding a epilee beneath the latten and springs sustaining said ai-reen from said means.

44. In a `ecparator, a plurality ot removuable inclined screens, and a traine or casini on which said screens are inhnnted. in coinl'iination with bars or nieinbers extendinj; transverselj` of `aaiil casing and epaced apart from the bottoni wall thereof, and sustaining said screens.

4.5i. ln a vepaiatoriythe combination with a plurality of removable inclined screens,

anil a casing on which Saul screens are inonnteil having side and hottorn walls, of a liar or nii-nilier beneath the adjacent edgeei ol two ot said screcn` and sustaining them, anacei'l alloro Said bottom. wall. to atord a passage above the latter.

Jttl. In a Separator, the combination with a plurality of removable inclined screens, and a casing on which Said screens are mounted haring iside walls and an inclined hotloin will, o't' transverse bare or members mounted in said casing beneath and spaced apart from said screens for sustaining the latter, and springs resiliently sustaining Said screens from said bars.

47. In a Separator, the combination with a renioi'ahle inclined screen. of a casing in which eaiil Screen is resiliently mounted having aille walls inclosing Said screein bars or angina4 mounted against the inner yidc walls of saiil casini! and havings inwardlyY extend'- ing llangcs beneath anil Sustaining :iaiil nerven at the sides ol' said nailing, and means rcsilientljvr susaininff said Screen interim-diate of the Fides ot said casino'.

4%. ln a eeparator, the coinl'iinationwith a resiliently mounted removable inclined screen, and 'ai caain'g on which said screen is mounted, of bars or angles mounted within space beloll lllli

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