US819179A - Pneumatic filter. - Google Patents

Description

PTENTED MAY lK 1906,.

E. G, SHORT?.

ILPPLICATON IILILP DEC. C0, MO5.

PATENTED MAY l, 1906.

NoI 819,179.

E. G. SHRTT. PNBUMATIC FILTER. APPLICATION TILBD DBO. 2o. 1905.

4 SHEETS-SHEET 2.

wi @www DATENTED MAY l, 1906.

FILTER.

QV/MOC E. G. SHURTT. PNBUMATIC FILTER.

APPLICATION' FILED DEC. 20. 1905.

Fumar r mmummmlif athena,

PATBNTED MAY l, 1906.

lliil Ninn YORK Llin RATUN OF NEW EUR? i URK.

NEW YORK, ASSIGNOR F UNE-HALF COMPANY, UF (,Al'lllAhlL NEW YORK, A

C FlLTEF.

To whom, 'it 'nz/Q3; corto/irri:

Be. it. known that i, citizen of the hinted Stutes, residing at Car triage, in the county oi Jeii'erson and State ol' l New York, have invente eertain new and useful lnmrorenients in Pneumatic Filtersand do hereby deolare the following to he a full, clear, and exact description of the invention, such as will enable others sinlled .in theI io art to which it appertains to inake and use f. the saine., reference han g had to the aseoiupartying' drawings, and to the atterri oi refer-- ence riniriod. thereon, which i. rin :i part oi" this specication.

This invention relaties to new and useful improven'ients in i'inrnnatic. lter-presses esecially adapted for use in the manufaeturo of hydruted lune in which it is necessary m order to roduee a satisfactory product to zo thoronglny slaize every niinute particle of the ilS linie, and to ace-on the caleinod lime-rool mixed maire saturatii'i i linle is r'A iii. f fi z5 atterri i hir-.acl uir ture anjfparielea which :nigl the lima-Water unalalrod.

To accomplish the purpose of getting rid of 5o the exhess of 'water which has heen added to the linie for the pnrposo of slaliing is the oh ject of the presont invention; and it eonsists of a rotaryrislrrinr haring pockets anout its c-ircuuference adapted to receive tho linux- Water as the carrier rotates in a tunis and in the pro-vision of nieuns .i'herelry each porltci muy he thrown into comuunication with a vacuum-,Chamber durixur a certain interval in I the rotary movement ofthe carrier7 whereh)r nlish uunsture and hot 1moisa large percentage ol the moisture ol" the lime Sperl ation of Final-inn G. non'rr, a i

aen?. witter to r vau" drier, tous l i it pass through Letters ntent. .tatenteu may 1, 1906.

! i'el'erenre marked thereon, forni a part of the present application, and in which Figi-iro 1 is a perspective viow of in); in1- proved pneumatic litter-press. Fig. 2 is a i transverse vertical section through the rotar)Y carrier and the tank in which said carrier roi taies. Fig. 3 is an enlurffed View, in side olo- Vation, of the carrier. l* ig. 4 is a detail View f showing the arrangmnent of the ports wheret by the various pockets about the rotary cari rier may he thrown into communication with l a vacuum und with air-pressure ducts. Fig. I 5 is n detail View of ont` of the sections applied i to the circumference of the carrier for the pur )oso of holding screen-cloths over the l poelrots, said View showingin top )lan View i one of tho buckets which dips the inie solution und causes the salue to lill the pocket as i the carrier rotates. Fig, 5 is an end View ol` f the detail shown in Fig. 5` Fig. l is a top plan View of one ol' the perforated plates x which are positioned in the various pockets l ahoul lhe circuiul'erenre ol the. carrier. Fig. l 7 is an edge view through one ol' said plates, u portion of said plate heilig shown in section to illustrate the corrugated surface thereof. Fig. N is u side elevation ol` u slight inodilicuj tion oi' my invention in which l )rovidc :1 stuiionury :nouns lor retaining the iurel solulion in the pockets until each pocket of the uurrier rises to a horizontal position, ut which iuoxuent communicalion is hud between Suid pocket and the vaciunuchaulher. Fig. l) is a sectional View through a hollow shalt adapted to he held to u shell through which romnuiuieation is had with the recessed huh ol the carrier. Fig. El is a lace View ol' the llungcd end of said hollow shalt, und Fig` l() is an enlarged detail section through oiuI ol the pockets of the carrier and through the corrugated plato and canvas strainer held thereovor.

Reference now being luid to tho details ol' the drawings hy letter, A designates a tank` lOO . leavingva slight space between the edges g sierra being rectangular in outline and of slight depth, each pocket having an opening D in the center thereof and each pocket having the bottom thereof slightly inclined toward said outlet-opening D, and through which opening the excessive moisture is withdrawn from the pocket in a manner presently to be described. An open ended passage E is fixed in each aperture D', and the inner end of each passage communicates with e. radial passage-Way E', formed in the hub en which is mounted upon'a reduced portion fil the hub B2 of said carrier. i

G designates a erforated plate having corrugations u on t ie upper surface thereof, as

shown clear y in Figs. 6 and 7 of the drawings,4

and said `plate is provided with leet g, and upon its edges projectlugs g. Said plate is made substantial-ly the shape of each pocket and of somewhat smaller area than the pocket,

thereor and the marginal edge of each pocket to allow the excess of water to be'withdrawn from the pocket. The 'object of said feet upon the plate is for the purpose of raisinT the plate a short distance from the bottom or the pocket in order to further facilitate the Withdrawal of the 'water held in the lime solution. vof the construction shown and described, and each plate is held in position within the pocket by means of countersuiiken screwsH.

l designates a screen-cloth, therebeing one .foreach of said pockets, and each screen is placed over the marginal edges about each pocket and is securely held over the pocket and plate positioned within the latter by means of the angled clamps K, detail views of whichare illustrated in Figs. 5 and 5a ol4 the drawings. 'Upon examination of said `liguresitwill be noted that each of said clamps is provided with a recessed lug K opposite the ends of the'cross-piece K2 of the clamp and provided for the purpose ol receiving the threaded end of an angle-bolt J, the angle of each bolt entering an aperture in the side rim J of tue rotary carrier, and said bolts are held in the .position shown by means orn nuts J2, which are tted upon the threaded ends thereof and bear against the outer faces or said lugs.

In the construction shown in Figs. l and 3 of the drawings will be seen a series o .buckets N, which are made integral one With each clamp K and extending between and connected to the parallel ends-ol each clamp. Each bucket has a closed end N, which extends substantially the length of one of the angled end pieces of each clamp, and the marginal edge of each. end is-tapered, as shown clearly inthe drawings, and provided to assist in holding the lime solution in the bucket and allowing the same to flow freely -into the pocketswithout running over the ends thereof as the carrier-brings-in succes;

Each pocket is provided with a plate sion the various pockets. to horizontal positions illed with the lime solution.

Referring to 2 and 4. of the draw-ings Will be seeii a chest M, which is cylindrical out lined and has two ports therein,`(designated, 7o respectively, by letters O and 0'.) Q designates a flexible pipe which is adapted to afford means of communication between a vacuum-chamber (not shown) and the port O, and P designates a flexible 1pipe commu- 75 nicating between aA pressure-c amber (not shown) and the port O at a certain interval during the rotary movement of thecarrier,

whereby as one or another of the Irecesses E', after having beencut of'from communica-8o tion with the-port O and the vacuumcharober', will come in registrationwith the port O, thus allowing air under pressure to act upon the cake-of semiplastic material Whichhasbeenformed in each pocket by the withdrawal of a large percentage of the mois-- ture from the material during the time that the pocket' is .in communication with the vacuum through' the passage E, port O', and pipe Q( In order to holdthe adjacent faces -9o of the hub F and the chest M in contactwith each other, l provide a tubularshank portion M, one end 'of which ,is` fastened to the chest M, and its other end is chambered, asat m, to receive a spring S, which bears between4 95 the inner endet' said chambered portion mand the box L. Said shank portionis slotted,

as at S', adapted to fitv over a lug S2 upon said box L. The inner end of said shank ortion M has a liange M2 withv op ositely-dis osed 1c curved slots R', through wliich' the bo ts R, Twhich are fixed t'o the chest M, pass, and nuts M3 are fitted to the threaded ends of said bolts, thus affording means whereby the chest M may be adjusted 'to bring the ports :o5 0 and 0 into their proper positions in order to allow the different passage-ways E toube brought into communication either With the vacuum-chamber or with the air-pressure s chamber at the'proper time to effect the re-` i 1o sult sought.

Referring to Fi seen a slight modgiic'ation in mfp-apparatus in which il provide a semicylindrica "shoe or guide member T, which is mounted to have a I 15 horizontal movement u on the frame of the tank, and by means o a set-screw T said' member may be moved horizontally toad# just the position thereof adjacent tothe ro-. tary carrier. The flanges upon said member'l 12o are provided with slots thr'ou hwhich bolts W ass, ther eby affording ui ing means for sai` member as it is move toward` or -away f from the rotary carrier. In said modification the buckets N (shown in Figs; 1 and 3`of x25 the drawings) are dispensed-With and the' marginal edges of the Icross-pieces" K2l are tary movement of 'the carrieriiilth aQtQf-lf P30.

.s of un drawings waits ..1

, ositioned in nach of said Dockets and i i simi/9 taining linz solution in the Vfurious igocliifs abou tire circumference thereof. By reluence to Fior. 3 it will be noted. that the lower end oi sai member T extends down into 'Clie tank, wiiinli is .adapted to contain he solution7 and is the carrier rotates toward tiro, lonwr and oi smid nieniloor said member serves lo retain the soluiion in the vocalists until tho pockets thus filled zissunio in succession iiori- Zontiil positions, :it wliicli liniey oonnnunioiition is opened wiili the` i'iiifuuiincininilicr to WitlfT nw ii largo porcontiigv of tiro r-Xcess of' nioisur@ from Lim solution, .'liicli will loiiv the rrsidrw in the simpa oi u milio of scniiplastic material.

The opcrstion of my apparatus is wry siniple and will be readily undirsiood when considered in connection with the foregoing iind with `5h@ mscoinpanying drawings und isos follows: A periora ted vnd corfugsted plato is screen-cloth 'ilgiid @zich poulie@ und limsi in place by moans of the buciet-cnrrying clamps. 'l'lie carrier is mail@ to roizitfi, and each buolie fis it. dips down in the solution will mise ii sullluisnt qiiiintiify ol' ilu, hitter to fill a pocket, it liningf dvsigiiid io have @zich buckety hold just enough ol said solution Lo fill a pocket. As tho carrier rotates willi the vmious bucliits, raising mieli si supply of tho solution, ii 'pocliol will liv iilluitl from nach buckety iis ouali of iiliiy lutter iissiiinos ii liori zontzll posilion, ilux solulion running ont oy griivi'iji niion lie serv-vn and into ilii noclw. s lli@ por! in tliil L-liisi` ll, willich fiiininiuni culos willi llio i'iiuuiiiii, vonnis iu iogisii':A Aion willi onu or moro oi ilus i'iiissiigo-wii-is Vlll in the liuli of llin ciiiiiiij, wliiCli would tiilw plow iii'iii' tlii poi-,kots oil ilux ciiirier :iro risu nig from iiliv siiil'aici olI ilif solution in lio t-iinli lo lioi'izconiil inisiiions, lio oliiii of iliu Yziciiiiin will iiil @xr-rind upon tlii ioniinls oly liu iioiliiisi'liiiingii iiiiiiiiil i'oiii'y nioionion'i. of lilii cni'i'io'r, i \'.lr:iifiing ilio ixitiss oi' nioisiure` ironi ilul solution, und iiiioi fini illvd poolw@ niissis iis lioiizaontiil nosiiioii roiziniiz nii'iiiion willi Lio viiiiiiini is vut oil', und dlr-r wurd lilii coniiiiiiniczilioii is oiiiiuzl ioiwion lili@y pzissngwwiivy liliiis siiiil oil l'i'oni iii@ init-- uiiiii und ilu` ]ii'issii1'ivliiiinlwi, iliiis nll'orfling` niiniis for loosiliing ilul i-,iilii from tlm svi-oon ovvi' ilu` poilwi, und iiny suiliililo iiiiiins nin)Y lio pi'ovidiil loi' rouoiving Llio i'iiliis ol' svniipliisiic nuiiviizil iis lilivy :iio loosonvd l'ioni llu ifiiiiviis or scrions.

Wlivii` tlii` loini ol' anim 'iiliiis illiisli'iiivd in Fig, n is utilized. llu ooiiiilion is sulisiiin liiilli llii siinio iis in lili@ oiliii Yorin. imm-.piingy liliiil llio iiniivx solulion is luild in llii pouliois by nioains ol llii coiiiiivoil C i'liiiili'iciil niinilioi' 'l`, lilius insiiriiir inizins wliciiliy iii@ liiiivI solution will noi` slop over {lio-edges of Lliv poifkits wliili lining izoniovi'od.

liii'l'iiro of liyilrsi'iwl limi, it will lio iniiilr-i stood limi l do n i moulins ilu? nonni .1i lus loi' any spnoisi use, as oliviinisly iiy muy no iii plied in treating furious solutions.

i'iiiving thus iii ll)r described niy invoniion, wlmi l Ciiiiin n und desire to secure by .liiiiiirs ljiiioni, isrw i. A. lon-siiniiilii` lilir'iirass voniiirisingI ii, rotiiiycairiior liiiving ii serios of iouliiiis iilioiil. its circiini'foriinci, :i tank in wl'iuli siiiil pocl- @is dip, ii Conciii'od sliiclii extending o'i'ffi zi poiion ol said cnrriir und iidziptod lo raisin the ninterifil within the pockets during ii um tial rotary nioviiineni oi t-lie Currier and moans for subjecting lli@ conionis of @sich pock- *Lo the action of ii vacuum und also to the action of air rinde-r prossimi nl' dill'niininionienis during ilio rotary niowinanl ol' ilu curi-ier, as set forth.

2. pneumatic lilsnpriss r-on'ipi" I rotin-jy Currier having n serios ol' poi-lavis iilioui iis oircuiiiieroiico, ii mili in wlnifli sziiil porlaeis; flip, :i coniriiiod sliiilil extending owl' :i portion 0f sind carrier und iidiipiifil lo iolaiin lli@niateriiilwilliin siiid iiocliitsdui'ing .si par iul roliny inov -=niiil of said c=i11l0r,0 .ioliol' said pocliclslniving un opening in tli'i bottoni thereof, n i'ncossed liuli to Suid cari-ier, passages communicating lniwoon siiid i'iponings und rwvsscs, und inoiins for bringing oiicli of said roiossos nilo oo:ninuniciitiion willi :i in iiuniunil willi :in :iir-piiissui'o diii ai different .l inuiiiniii': iil'ii-i roiiiiiiisiiig zi iloiziiii-ziri'inr lini'infg ii soi csof )on ils i-ii'i'iinilii'inf'o, ai inni; in wlncli said pooliols iiiii, ii i-oiii'iivod sliioiil oxliionding over :i noi'iion ol` iid curi-ivi' and ndiiilid io retain ilii niiiloi'iiil will in siii-d poi-kots diiiingii )im liiii roiiii'y inoi'ifiiiunl ol siiid Qiirrioi, olii-ii of siiid noilwts im vinylv iin opening in tiny liol'oni liiiiioi, :i i'iwssod liiili lo siiid uurriir, inssiigis i oiiiiiiiiniciiiing lioiiwocii smid opvinngs :ind i'iliissis, und iiiljiisiiilili nir-anis For bring` ing mii-li ol' siiid rei-us: n: iiiio voininiiniifziiion 'willi ii i'ziviiiini und umili :in nir-iii'ossiii'c duct iii, dill'irin'i iiiiiii'i'iils during llio ioliini4 more iiioiil` ol' llif iiii'ioix iis soi l'oi'iili.

A iiniiiiiiiiiiii liltinnrinss Comprising' n rotzii'y i-zii'iiii having n sni'lisol' iiocliits iilioiily its vii'cunil'vi'iiirv, ii trink in wliii-li saiid noi-liiils digi, -ti vonvaiwd sliiild oxioiidiiig ovvi' i gioition o" siiid viii'iiii :ind iidiiiilid to iotiziin iiiii iinitiiiiilwitliiiisiiid noilwisduringr ii piu'- liiil ioiiiry nioviiniiil ol' sziid iiiri'ii-i', oiuli o1" sziiil pox'koi's liiii'iiig :in :winning iii llu lioiioni iliiriol', ii rvcfossid liiil.- lo smi( i'iiii'iir, opoif ond-id iiiisszigis conininiiicul ing liotiwivn ciicli nocliil :ind zi rim-oss ol` sind liiili, ii siiiiioniiii` ClinsL liiii'ing ilioi'ls oiwning iiliroiigli lilo laico lnrool, iidiipt'od to coiinnuniciiuwilli siiid iiccsses, onix oi' siiiil ports ziiliiptcd to coni` niunicmo willi lli@ viicuuin and lili@ other boing especially iidiipivd for us in the n'iiiuuwith ii'pressnro-clniinber, us sei forth.

5. A pneumatic filter-press comprising a rotarycarrier having a seriesol' pockets about its circumference, a tank in which said pockl ets dip, a concaved shield extending over a.,

portion of said carrier and adapted to retain the material within said pockets during a partial rotary movement of said carrier, each ofsaid pockets having an opening in the bottoni thereof, a recessed hub to said carrier, openended passages cominunicatinfy between each ocket and a recess of said hu i, a stationary chest held yieldingly avainst the recessed face of said hub and provided with ports opening through the face thereof, adapted to communicate with said recesses, one of said ports adapted to communicate 'with the vacuum and the other with a pressure-chariiber, as set forth. I

6. A pneumatic filter-press comprising aV rotary carrier having a series of pockets about its circumference, va tank in which said pockets dip, a co'ncaved shield extending over a portion of said carrier and adapted to retain the material within said ockets during a partial rotary movement oiP said carrier each of said pockets having an openin in the bottom' thereof, a recessed hub to sai carrier, openended passages communicatin between each pocket and a recess ofsaid hu a stationary chest held yieldingly a ainst the recessed face of said hub and provi ed with ports opening through the face thereof, adapted to communica'tewith said recesses, one of said ports adapted' to communicate with the vacuum and the other with a pressure-chamber, and means for adjusting said chest with reference to the recessed hub., as set forth.

7. .A pneumatic Afilter-press comprising a l rotary carrier having a series of pockets about its circumference, a rtank in which said pockets dip, a concaved shield extending over a portion of said carrier and adapted to retain the material Within said ockets durin a artial rotary movement o vsaid carrier t e ott A rn of each pocket having an opening therea hub to said carrier having" recesses .formed therein, passages communicating between said recesses and the openings in said ockets, a stationary chest havin ports opening through the face thereof an adapted to 'fregister with the recesses in said hub, where-- by communication may be had between each recess and a vacuum, and a pressure-cylinder at different moments during the rotary movement of the carrier, and a hollow i yielding sleeve adjustably secured to said'c est, as

set forth.

8. A pneumatic iilter-press comprising a rotarycarrier having a series of pockets about its circumference', means for automatically lling said pockets as the carrier rotates, the bottom of each pocket having an opening therein, a hub to said carrier having recesses formed therein, passages communicating between aaid recesses and the openings in said lpockets, a statiimarv chest having ports opening through the hice thereof and adupted to register with the recesses in said hub, whereby communication may be had between each recess and a vacuum, and a presl sure-cylinder at different moments during i the rotary movement of the carrier, and a ,hollow yielding shaft, one end of which has-a flange with elongated slots therein, bolts secured to said chest and assing through said slots, and nuts upon sai( bolts, as set ibrth.

'9. A .pneumatic vfilter-press comprising a rotary carrier having a series of pockets about ,its circumference, means for automatically dfilling said iockets as the carrier rotates, eac i of said poc ets having an openin in the bot tom thereof, a shaft on which t ie carrier is mounted, the hub of said carrier having series of recesses formed therein, openended passages, each communicating between an opening iii the pocket and 'one of said recesses, a stationary chest having ports opening ister with said recesses whereby each recess may be thrown into communication with the .vacuum and with an air-pressure chamber at different moments during the rotary movement of the carrier, a hollow shaft fixed at one end to said chest, its other end being recessed, a s ring seated in said recess and adapted to liold the chest tightl against the recessed face of said hub, as set orth.

10. A pneumatic filter-press comprising a rotary carrier having aseries of pockets about its circumference, means for automatically iilling said pockets as the carrier rotates, and means for subjecting the contents of each pocket to the `action of a vacuum and also to the action of air under pressure at different carrier, a corrugated plate positioned in each pocket, means for holding the plates in the pockets, a strainer over each pocket, and means for holding the strainers upon the carrier, as set forth.

11. A pneumatic filter-press comprising a rotary carrier having a'series of pockets about its circumference, means for automatically filling said pockets as the carrier rotates, and means for subjecting the contents of cach pocket to the action of a vacuum and also to the actionV of air under pressure at dii'i'ercnt moments during the rotarymovement of the. carrier, a corrugated plate positioned in each pocket, means for holding the plates in the pockets, a strainer over eachl ocket, a series of plates,and means for hol ing said plates upon the carrier, as sot `forth.

12. A pneumatic filter-press comprising a rotary carrier having a series oi pockets about its circumference, a bucket positioned adjacent to each pocket and affording means to fill thelatter as the carrier rotates, and means for subjecting the contents of each ocket to the action of a vacuum and also to t e actionJ through the face thereof and adapted to reg- IOO fio5 v IIC oi air under pressure at different moments during the rotary movement ofthe Currier, as set iorth.

i3. A pnennm le {liter-press comprising a rot-eng)Y carrier havin; a series oi pockets about ita vireninference, meanh.` lor automatically lilling said porliets as the carrier rotates, and means lor subjecting 'the eontentb` of each pool-:et to the notion oi n vaenuzn and also to the aetion oi' nir under pressure atiliferent nnimentduring the rotnrxv movement of the eznrier, n corrugated plate positioned in each pocket, meanv lor holding the plates in the poeltets, a strainer over eaeli pooliet. a series of pliite :ind mean` lor lnildinpr said plates upon the carrier, and a luieket enrried hy eaeh pln'e. as set forth.

.t pneumutie lter-press eomprisingz a rotnrj.' eiirrier ha Vin;r a series of poeliets about itA i'ireuinference. meamfor automatically lilliug #aid poelqetsv ns the carrier rotates, und mmm` for subjecting the eontents of ezieh pot-liet to the aetion of ii vaeuum and also to the aetion ol' air under pressure at different moment` during the rotary movement ofthe earrier. n eorrugateil plate positioned in eaoh poel-tel', means for holding the platee` in the pockets, a strainer over eaeh pocket, means for holding the A trniner upon the Carrier, enen olamp haring Slotted luga projecting from the ernia tnereol', und nuanrs engaging sind logis ior holdinlgtlie elainp y upon the eariieiy. in: Het l'oilh.

i5. pneumatic Miter-presa comprising a rotinyoarrier havingY e. series oi poeliets about in ciroumleienee. mea-na ior automatieally iillineY mud pockets as the carrier rotate-s, and menno for subjecting the contents of each poeh-ei to the act-ion of a vacuum and also to the action oi air under pressnreat diferent moments during.; the rotary movement of the carrier, a. corrugated plata 1 oooltet, niet .s for holdingy the. plates in the strainer over each poe-liet, menne Holi the straniera upon the carrier, clamp having slotted lugs projecting the ends thereof, bolts having angled fitted in holes in the rin'io the carand positioned in the slots of said lugs, nuts ltted upon tho threaded ends of said bolts, as set forth.

.oositioned in each' 16. A nneurnatio filter-press comprising a rotaryoarrier having a seriesof pockets about its oiromnferenoe, means for automatically filling said pockets as the carrier rotates, and means for subjecting the contents oi each pocket to the action of a vacuum and also to the action oi air under pressure at diorent moments during the rotary movement of the carrier, a Corrugated plate positioned in each pocket, means for holdin'g the plates inthe pockets, n strainer overveaoh pocket, a series ol' clamps and means for holding said clamps upon the carrier, a bucket carried by each clamp, each bucket having an end which extendo` beyond the marginal edge of the bucket, as set forth.

l?, A pneumatic filter-press comprising o, rotary carrier having n circumference made np ot a series of flat portions, each of which is recessed forming a pocket, means for subjectingthe contents of each pocket to the action of a vacuum :ind also to the action of air under pressure at different moments during the rotary movement of the carrier, a series of elanips having angled ends adapted to lit niger the marginal edges of the pockets, a corrugated plate mounted in each pocket, a. screen held h v said Clamps over each pocket, and means for ant miatieally fillingr the pook ets as the carrier .otates, as y et forth.

18. A pneumatic filter-press comprising a rotary carrier having a circumference made up of a series of llat portions, each of which is recessed forming a pocket, means forsubjectintf the contents of each pocket to the action ot' a vacuum and also to the notion of air under pressure at di'erent moments during the` rotary movement of the carrier, a series of clamps having angled ends adapted to fit over the marginal edges of the pockets, a Corrugated plate mounted in each pocket, a screen held by said clamps over each pocket, a bucket formed integral with each of said clamps and positioned along the marginal edge of each pocket, as set forth.

in testimony whereof l hereunto aix my signature in the presence of two Witnesses. EDWARD G. SHORTT. 1ivitnesses:

A. F. MILLS, J. T. JONES.

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