US2479945A - Screen with adjustable longitudinal partition - Google Patents

Description

- C. LINCOLN EEN WITH ADJUSTABLE LONGITUDINAL PARTITION Aug 23,

SCR

Filed Sepi. 13, 1944 Patented Aug. z3, 1949 y 2,479,945

UNITED STAT PATENT QFF'ICE 2,479,945 SCREEN wrrii AnJos'rAnL LONGI'TUDINAL PARTITIoN Charles S. Lincoln, deceased,A late of Wauwatosa, Wis., by Qra` L. Lincoln, c iiecut'rix, Wauwatosa, Wis., assigner toAllis-Chalmls. Manufacturing Company, Milwaukee, Wis., a corporation of Delaware Application September 13, 1944, Serial.- NO- 553,825'.

s claims. (C1. 209-265,)

This invention relates to screens for separating Fig..2 is an enlarged fragmentary view of a poi'- liquids or fine materials *from two or more streams tion 0f the Structure shown in Fig. 1; of dissimilar mixtures and is particularly con- Fig 3, a fragmentary view partially in 'seccerned with longitudinally dividing the space tion on the line ill- 111 of Fig. 2,; above the upper surface of an end-tensoned l Fig. lisa fragmentary cross section on the line screen deck, IV-IV of Fig. 2;

Particularly in the sink-oat process of sepa- Fig. 5 lis a fragmentary crOSSv section taken ori ration of solids of different densities in a heavy helin V-V Fig. 1.; and fluid medium, the occasion arises for recovering Fig. 6 is, a iragrnentary detail View showing in the separating medium from the separated mail" tot? elevation, a PQllO. SCllhQl Sl'- terials. This may readily be done by separately In orderpto longtulllllly divide the stie@ 2lb-@V3 screening the sink and i'ioat mixtures on separate 2L Single Width 0f SCle Qldlh, ylil SQIGI .SliCll screening devices. However, due to the desirthat. Shown in the drawg, iS lnllllftnt that ability of keeping plant cost low, and saving space, lille use 0fy superstructure which would HIG it frequently becomes desirable, if possible, to 'l Wiihthe-clianng4 0f SCIBGIS and W'l the plac# use a single vibrating screen device, as its cost Illll. 0f' the paltllfm al? arly CliSel illal lfltl* and space requirements per unit of area will be mediate the SidQWallS be VOldd- K Y, lower than those of two separate screening devices fell'flg tOlllhe drawing! it iS See #bei 11 CICI of the same total capacity. deck, construction embodying the invention The most suitable screens for this work are in I ldeaLSCreenb dy or from@ l' having `Slde Well? screens of the end tensioned type shown in the Z rigidly COIlIle'fled by 6nd I'OSS Hiefrrbfs, 0l applicants U. S. Patent No. 2,338,523 in which tranSVeSe Irllei'bs t0 llfl 4eA Ctagulr a laterally flat, longitudinally stepped, screen surframework, and may be supported and aCl'fllated. face is obtained. Placing of an effective longif O exampl t0 lbl'a'te 0r lflprctef @Olive-Il, tudinal partition in a screen of this type to keep r-T" loal Ingalls sllc 35.3.17? more, uHYdeSCrlbe-@l the sink and float products separate while recov- LEtte's Patent No? 2,338,523 issued t0 Charles" S- ering the medium, was unknownor difficult of- LlnClrL v y accomplishment before the presen-t invention oe- ,Irttmediat theLFll'lembes one 0T mom cause cross members of the screen must be rela-` trtnsl'efse Screen mountmg members may be tively movable for tensioning and replacementcf m qlltaqhd t? Sider: Waus f r longitudina'la-dmst; Screen 010th Sections' mentrelative to said slde walls by` known An object of the present invention is toy provide Julstmg. mechamsms als @Own m Figs'- 2 OZS; an adjustable longitudinal partition for anend and .more muy descmbed m allem N0123`8553 tensicned screen deck in order to' obtain effective prevlotsly referred to'. sfuma-121e. lqngltudmuy pavttonind Wthcut interfering with the. nm; 3 1, extend-ing screen cloth sect1ons a having end hooi;

` b strips 8 and extending laterally between the side mal adlustablty o? the' Serge?, gem .slr Walls 2- are attached, supported and longitudinally ,Another oblect 1S ,mf mol/1depamblon for tensioned between successive pairs of transverse mounting on the movable cross members of an members 3 and 4, in a manner Shown and Q en? lensloned .Screen decl" Fluch will @600mm-0 .m scribed in dei-.au in U.` s. Patent No. 2,338,523 u; date itself to the change 1n distancebetween cross form a, 10ngitudma11y spped transverselyfat, members and to changed Scl-"een contour upon ad screen surface, each section extending from a luslment of the Screen tension.' lower surface of one transverse member 3 or 4 More particularly, the inventionconsi'sts in proto an upper surface of a `Succeung transverse Vding a Screen having relatively movable tram f1.5 member. End transverse members 3` may be' verse screen mounting and tensioning members adapted as smleen mounting members by provid? with an effective longitudinal partition' for' divide ing them with movame Screen hook eg'gig ing the space above a single width of screen cloth; members 9",.0f known Suitable type' Shown in Fig 1, The invention having the above" and stillv iuifor engagement with and tensioning' of the ad', tha Objects and advantages Which may' appeal? 50 jacent screen sections l. Vertically extending llereinbelow can best be carried' into practical Surfaces, of members 4 form risers in the stepped elfect as fully described hereinbelow" in' conn'ccscreen surface. tion with the accompanying drawing; in' which: The foregoing description forms no part of the Fig. 1- is a vertical longitudinal'sect'ion through invention exceptas combined with a longitudinal partition I'I` to provide for a division of the in aa screenacccrding to the invention;

terial treating screen surface into separate longitudinal portions for treatment of dissimilar mixtures of materials, as described hereinafter.

Partition II may be made up of a number of wall sections I2 corresponding to the number of screen sections 'i (shown as three in the drawing) mounted in such a manner as to contact the screen surface at their lower edges. Lugs I3 or gusset plates for mounting wall sections I2 are rigidly secured in any suitable manner, as by Welding, to transverse members 3 and 4, intermediate the side plates 2. These lugs I3 may be metal plates, formed at their lower ends to ft the transverse members to which they are attached. Those attached to intermediate transverse members 4 are formed to t the forward faces of the members to which they are attached. All lugs I3 project substantially above the general level of the screen cloth, that is, the upper surfaces of their respective transverse members 3 and 4, and those attached to movable members 4 are movable therewith. Wall sections I2 may be provided with longitudinally elongated holes, or slots I4, and may be bolted at their opposite ends to lugs I3 in longitudinally adjustable relation as shown in the drawing. The adjoining ends of wall sections I2 are overlapped and interiitted in any suitable manner, or as clearly shown in Fig. 2, to t the stepped screen deck surface and form a continuous wall or partition l I intermediate side walls 2, dividing the screen surface in any desired proportion.

Each wall section I2 may be composed of a pair of strips I5 of metal, plastic, wood, or other suitable hard material, between which is sandwiched a sheet I6 of resilient rubber, or other soft plastic, which projects at one edge below the plates or strips I5 to provide an edge capable of deformation to nt the contour of the upper surface of a screen cloth section '1, which may be upwardly crowned, as shown, over one or more fixed 4cross members I'I. The plates I5 and rubber sheet IB may be cut away, as shown at I8` in the drawing, to allow wall sections I2 to be intertted in longitudinally alined relation, and may be curved in a vertical plane to approximately match the stepped, crowned, screen surface.

It will be readily apparent that partition II may be located at any desired plane intermediate side Walls 2 and that longitudinal adjustment of one or more movable transverse members 4 may be accommodated by relative longitudinal adjustment of sections I2 relative to each other and to the lugs I3 by which they are supported.

The device shown in the drawing vprovides an end tensioned, transversely-fiat, screening surface, divided longitudinally into a number of material treating portions in any chosen proportion (shown in Fig. 5 as two portions in the proportion of about one to two in width) by a dividing wall II, which effectively accommodates changes in longitudinal screen surface contour and seals against a transversely continuous screen cloth surface without seriously reducing its effective area.

Reversible screen cloth sections 'I described in U. S. Patent No. 2,334,707 to W. C. Johnson, and U. S. Patent 2,338,523 to C. S. Lincoln, may be accommodated, as shown in the drawing, by merely cutting slots in the hook strips 8 at the points where lugs I3 might interfere with their attachment, as shown at I9 in Figs. 4 and 6. Wall sections I2 may be readily removed, for permitting removal and replacement of screen i sections 1, by unbolting the sections I2 from lugs I3.

A feed apron 2I attached to feed end member 3 in any suitable manner may be divided by a short upstanding wall member 22 secured to its upper surface in any suitable manner, as by welding, in alinement with partition II. Its forward end may be bolted to a lug I3' so as to form a continuation of partition II.

It will be readily apparent from an inspection of the drawing and description that streams of dissimilar mixtures of materials placed on the screen at opposite sides of partition II will be kept separate above the screen cloth as they move longitudinally of the screen body I and may be separately discharged after treatment.

It will be understood that the precise structure specifically described and illustrated is purely illustrative, and that the invention is intended to incude such modifications and equivalents as may readily occur to persons skilled in the art to which it appertains, within the scope of the appended claims.

It is claimed and desired to secure by Letters Patent:

1. A partition for longitudinally dividing the space above a screen deck surface comprising longitudinally spaced supports mounted on the frame of said deck and extending above said deck surface in longitudinal alinement, and a loomposite wall adjustably secured to said s-upports formed of two separate sheets of hard durable material and a layer of resilient rubber-like plastic material sandwiched between and adjustably extensible beyond the lower edges of said metal sheets into sealing contact with said screen deck, said sheets being perforated for passage of securing elements therethrough, said layer of resilient material having enlarged perforations through which said securing elements pass, said enlarged perforations providing for adjustment of said layer relative to said sheets, and said securing elements being operable to move one of said sheets relatively to the other in clamping relation t-o said resilient layer.

2. A screen for separating a plurality of streams of dissimilar mixtures of materials comprising side walls, at least three frame members extending transversely between said side walls, at least two sections of screen cloth attached at their ends to and spanning successive pairs of said transverse members and extending transversely between said side walls to form a longitudinally stepped screen surface, an intermediate one of said transverse frame members having a vertically extending surface forming a riser between adjacent ends of the said screen sections attached thereto, an upright l-ug supported solely by attachment to said riser surface and extending above said stepped screen surface intermediate said side walls, and at least two longitudinally alined partition wall sections individually adjustably attached at their adjacent ends to said lug in overlapping relation to form a partition wall longitudinally dividing the space above said stepped screen surface and between said side walls.

3. A partition wall for dividing the space adjacent a stepped screen surface having at least one riser, one upper screen section and one lower screen section, said wall comprising a plate-like support member secured edgewise to and supported solely by said riser and extending therefrom in a plane perpendicular to said riser and screen sections over said lower screen section throughout the depth of said riser, a plate member having an edge contour to fit said upper and lower screen sections of said stepped surface and means to secure said plate to said support in supported relation with said edge contour engaging said upper and lower screen sections; said support and plate cooperating to divide said space substantially in the plane of said support member.

4 A partition wall for dividing the space adjacent a stepped screen surface having at least one riser, lone upper screen section and one lower screen section, said wall comprising a plate-like support member secured edgewise to and supported solely lby said riser and extending therefrom in a plane perpendicular to said riser and screen sections over said lower screen section throughout the depth of said riser, a pair of separate plate members, one having an edge contour to substantially fit said upper screen section, the other having an edge contour to substantially iit said lower screen section of said stepped surface, and means to secure said plate members to said support in supported relation with said edge contours engaging said upper and lower screen sections respectively; said plate members and support cooperating to divide said space substantially in the plane of said support member.

5. In a screen construction involving a transverse frame member of substantial vertical depth having oppositely extending, overhanging, hookengaging edges in vertically spaced parallel planes and a pair of screen sections having end hook strips hooked over said edges from above and below, respectively, in such a manner that said sections extend in opposite directions to form a stepped screen surface with said transverse frame member as a riser, a plate-like partition support member secured in edgewise relation to a riser surface of said transverse member supported solely by securement to said riser surface and extending from said riser surface in a plane perpendicular to said riser and screen sections over the screen section hooked from below throughout the full depth of said riser surface, partition plates having edge contours to iit said screen sections and means to secure said plates to said support member with said edge contours engaging corresponding screen sections; said plates cooperating with said support member to form a partition wall dividing the space above said stepped surface substantially in the plane of said support member.

6. A partition wall for a stepped screen surface having an upper screen section, a lower screen section and a riser surface joining said upper and lower screen sections, comprising a gusset plate in a plane perpendicular to said riser surface and formed to iit said riser surface, said gusset plate being supported solely by securement to and filling the angle between said riser surface and said lower screen section, a partition plate having a lower edge adapted to iit the contour of said lower screen section, and means for securing one end of said partition plate to said gusset plate in such a manner that its lower edge forms a continuation of that of said gusset plate; said gusset and partition plates cooperating to divide the space above said lower level substantially in a plane perpendicular to said screen and riser surfaces.

7. In a partition wall having a variably stepped lower edge for tting to a variably contoured stepped screen surface, a first wall section having a lower edge adapted to fit an upper screen surface contour, a second wall section having a lower edge adapted to iit a lower screen surface contour, a connecting plate forming a part of said wall and having a corner fitting the angle between said lower screen surface contour and the riser surface joining same with said upper screen surface contour, said connecting plate having its plane perpendicular to said riser surface and said stepped screen surface, and being supported solely by securement to said riser surface, and means adjustably securing said wall sections to said connecting plate in wall forming relationship.

8, In a screen for separating and conveying at least two dissimilar streams of material, a frame having side walls, at least three transverse frame members extending between said side walls at least an intermediate one lof which is movable relative to the others, at least two sections of screen cloth, one said section being secured at its ends to and tensioned longitudinally between one said transverse member and the upper edge of a succeeding said transverse member, a second said screen section being secured at its ends to and tensioned between the lower edge of said succeeding transverse member and an upper edge of the next succeeding transverse member, each said section extending laterally between said side walls, said sections forming a longitudinally stepped screen surface, said intermediate transverse member having a vertically extending surface forming a riser between adjacent ends of the screen sections attached thereto, means for moving said intermediate member longitudinally of said screen, an upright lug rigidly attached to said intermediate transverse member intermediate said side walls and extending above said screen surface, said lug being supported solely by securement to said vertically extending riser surface of said intermediate member, a longitudinally extensible partition longitudinally dividing the space over said screen surface intermediate said side walls, said partition wall comprising at least two longitudinally aligned plate sections and means securing adjacent ends of said plate sections to said lug in longitudinally adjustable, overlapping relation.

ORA L. LINCOLN, Eecutrim' of the Estate of Charles S. Lincoln, De-

ceased.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 161,147 OBrien Mar. 23, 1875 444,252 Palin Jan. 6, 1891 924,358 Jessup June 8, 1909 1,136,293 Sutton et al. Apr. 20, 1915 2,052,004.- Remick Aug. 25, 1936 2,068,413 Hunsicker Jan. 19, 1937 2,090,767 Sayers et al Aug. 24, 1937 2,115,110 Keil Apr. 26, 1938 2,298,153 Overstrom et al Oct. 6, 1942 2,310,736 Gruender Feb. 9, 1943 2,334,707 Johnson Nov. 23, 1943 2,338,523 Lincoln Jan. 4, 1944 2,378,463 Burls June 19, 1945

Images