USRE18530E - Ing works - Google Patents

Description

A. L. MUNI-go l I 119" VIBRATORY'SCREEN, Re

, A 2 Sheets-Sheet l h Original Filed Sept. '7. 1928 INVENTOR.

lAHORA/Em.

A. L. MUNRO July 19, 1932. "mm" scm" Re. 18,530

ZSheelZs-Sheet 2 origina; Filed Sept'. '7, 1928 ATTORNEYS.

Reiasued Jul'y- 19, 1932 UNITED lSTATES PATENT lort-"Ict:

ALEXANDER L. MUNRO, F MILWAUKEE, WISCONSIN, ASSIGNO TO ENGINEER- ING WORKS, OF MILWAUKEE, WISCONSIN, A CORPORATION 0F WISCONSIN vmna'roaz seaman Original N'o. 1,730,435, dated October 8, lg29, Serial No.

' reilue led April 25, 1931. j Seriall No. 532,966.

This invention relates to improvements in` vibratory screens, `more particularly, although not solely, adapted for screening crushed stone, gravel, etc.

Itis one of the objects ofthe present invention to provide .a vibratory screen in which the movements of two or more screens are balanced against each other to reduce the strain on the respective parts'.

A urtherob]l ect ofthe invention is to pro vide a vibratory screen in which the respective decks are vibrated by independent eccentrics in opposite relation to each other.

A further object of the invention is to provide a vibratory screen in which theend portions of the screens are yieldingly and pivotally supported at thelr opposlte ends in a manner to perm't the bodilyimovement of the screens both vertically and horizontally.

A further object of the invention is toprovide a vibratory screen which is of simple construction, is strong and-durable, and is well adapted for the purpose described.

With the -above and other objects in view,

the inventionl consists of the improved vibrating screen and its parts and combinations as set forth in the claims, and .all equivalents thereof.

In the accompanying drawings in which the vsame reference characters indicate the same parts in all of the views:

Fig. 1 is a top view of the improvedvibratory screen, parts being `broken away to show parts therebeneath; Y Y

Fig. 2 is a side view thereof, parts broken away;

Fig. 3 is an end view of the machine, parts broken away; L

Fig. 4 is a transverse vertical sectional detail view on a larger scale and taken on line 44 of Fig. 2; and

Fig. 5 is a similar view of Fi 2. y r

Referring to the drawings, thel numeral 8 "-5 indicates afi-ame or support of rectangular taken on 4line 5-5 304,404, led September 7, 1928. Application" for formation upon which are mounted central upper bearings end brackets 10. A main drive shaft 11 extending transversely across the frame Sais `journaled in the bearings 9 and at one of its end portions is provided with a pulley 12 for drivin Opposite end portions of the shaft between' the bearings 9 have mounted fast thereon pairsof/eccentric sleeves 13 and 14 held in vposition by keys 15. The eccentric sleeves of each pair are oiset, on the shaft. 11 diametrically opposite each of the sleeves 14v abut against shoulders 11', while the outerends of the outer sleeves 13 abut against the bearingl 9.

Ball bearings 16 and 17 extend around the eccentric sleeves, and the inner bearings 17 have bearing sleeves 18 whichsurround the balllbearings 17 and are mounted beneath a central transverse member 19 formingpart of the upper screen frame 20. Said frame is of rectangular form and is provided with removable screen sections 21. Transversely and longitudinally extending angle bars 22 forming part'of the frame and upon which the screens rest serve and the screens.

The inner opposite side portions of the frame are provided with 'removable inclined or curved guards 23 which are secured Iat their upper edges to downwardly and portions of the screens to deflectthe material to be screened directly upon the screens.

Portions of the inner ball bearing casings 24 extend inwardly towards eachother to're'- ceive-the opposite ends of' a tube 25 which protects the shaft 11.

extends around and The bore of the tube is of larger diameter than the shaft 11 to permit the eccentric movement of the ball casingand the tube with relation to the'shaft. Said casings` 24 connection with. a -source of power.

to reinforce the frame the frame and extendinwardly over the side edgeA 9 and lower front and rear other and the inner ends extend. on' opposite sides of the' bearing sleeves-18 and hold the screens. The

be formed of rubber, metal or other material, v

tion with relation to the other Links 33 connected to pivot bolts or pins parts in alined position. l Y

The outer ball bearings 16 are also provided with bearing sleeves 26 which surround the ball bearings 16 and are mounted on a central transverse member 27 formingV part of the lower screen frame 28. Said lower screen frame is also of rectangular form and is provided with removable screen sections 2 9 whichmay be easily removed and screens of a different mesh submitted. Transversely andlongitudinally extending angle bars 30 forming part of the frame28 and upon which the screens 29 rest, serve to reinforce the frame and the screensin providing intermediate supports for thescreens `between thev main members of the frame. The inner side portions of thelower frame are provided with removable inclined or curved guards 31 which are secured at their upper edges to the side portions of the frame and extend downwardly and inwardly over the side edge portions of the lower screens to deflect -on the lower screensl the material screened from the upper and coarser mesh guard members 23 and 3l may nas desired.

The casings 32 surrounding the outer ball bearings extend on'opposite sides of thebearingvk sleeves 26 and hold said parts in posiparts.

34, which project through the front lower and rear brackets 10, extend upwardly on opposite sides of bothl ends of the screen frames and are adjustably connected together by transverse rods 35. The opposite ends of the rods are threaded to receive nuts 36 to secure the rods to the links and said links are each provided with a series of rod openings '37 to vertically, adjust the position of said rods with relation to the links for reasons to be later described.

Bracketsd 38 pivotally mounted on the' transverse rods and bearing against the inner sides of the links 33 have upwardly and ydownwardly projectingy rod extensions 39 and 40, and theextensions 40are provided with nuts41 on their lower ends. The rods 39 extend partly through bearing brackets 42 mounted on the opposite side portions of screen frame 20, while the rods 40 extend downwardly through brackets 43 mounted on the' opposite sides of the screen frame 28, and sleeves 33 surrounding the rods 35l are interposed between, the brackets to hold said brackets in position. Coiled 'springs 44 surroundingthe respective rod extensions'39 and 40 are interposed between the brackets 42 and 38 and between the brackets 43 and the nuts 41, so that the forward and rearward end portions of the screen frame are yieldingly supported upon the rod extensions 39 and 40 and said rods are pivotallyconnetd grease supply to the links, and the links in turn are pivotally connected -to the frame or support. The upper brackets 42 are provided with fittings 39 for lubricating said rods 39. s thus connectedvr the screen frames are maintained and supported in rela- /nation of the screen frame to discharge the pieces of material too large to pass throu h lthe meshes of the screens by changing t e` transverse rod from one pair of openings 37 in the links 33 to another pair.

In use the screen frames are adjusted to the desired inclination and the central shaft is 'rotated to vibrate the screens in diametrically opposite directions throughout all'portions of their movements. As thus operated f `the screen movements oppose or counterbalance each other and thus eliminate excessive wear of the parts. When rotated the material, crushed stone for instance, is fed onto the upper screen and the pieces of less l*size than the openings of the mesh will pass therethroughand drop to the lower screen while the larger pieces will be discharged from the rear end.. of the upper screen andc taken care of in any manner desired. The screened stone dropped on the lower screen of smaller mesh will be'again screened and the smaller pieces will pass through the lower screen while vthe larger pieces will be discharged from the rear end, thus providing for separating the three sizes of stone or other vmaterial from each other. It will also be noted that the' true circular movement of the screen members and the direction of rotation will cause the material resting on the screens to be advanced towards the discharge end of thescreen and thus spread the material over the screen in working it towards the discharge `end and thus permit the smaller pieces to drop through the meshes of the screen.

It is to be understood that other screen frames may be mounted on the extension rods to provide a vibrato screen. having a greater number of screenldecks if desired.

From the foregoing description it will be seen that the vibrator screen is. of very simpleconstruction and 1s well adapted for the purpose described'.

What I claim as my invention is:

1. A vibratory screen, comprising a, support, an upper and a. lower screen member positioned adjacent the support, a shaft jourvnaled on the support and having connections with the screen members forvibrating said I members in opposite directions with relatlon to each other, means yieldingly and pivotally connecting the screen members together and pivotally connecting the said members to the 4for pivotally support, and means for rotating the shaft.

2. A vibratory screen, comprising a. support, a transverse shaft journaled thereon and having eccentrics extending in opposite directions, an upper screen member journaled on one of the eccentrics, a lower screen mem-v ber joui'naled on the other eccentric, means connecting the screen members together at one end portion and to the support, and means for rotating the shaft to vibrate the screen members in opposite directions with relation to each other.

3. A vibratory screen, comprising alsuport, a transverse shaft journaled thereon and having spaced eccentrics, the eccentrics extending in opposite directions, an upper screen member j ournaled on one of the eccentrics, a lower screen member 'journaled on the other eccentric, means for pivotally connecting the screen members together at one end portion and to the support for maintaining the screen members approximately in parallel relation to each other, and means for rotating the shaft to vibrate the screen members in opposite directions with relation to each other.

4. 'A vibratory screen, comprising -a support, a transverse shaft journaled thereon and having spaced pairs of eccentrics, the eccentrics of each pair Vextending inopposite directions, an upper rectangular-shaped 'screen member journaled on oneof the like eccentricsof each pair, a lower screen member journaled on the other eccentric of each pair of eccentrics, means for pivotally connecting the screen members together at one end portion and to the support, and means for rotating the shaft to vibrate the screen members both verticallyand horizontally in opposite directions with relation to each ot er.

5. A vibrating screen, comprising a support, a transverse shaft journaled thereon and having spaced pairs of eccentrics, the eccentrics of each pair extending in opposite directions, an upper screen member journaled on one of the like eccentrics of each pair, a lower screen member journaled on the other eccentric of each pair of eccentrics, links pivotally connected to the support and extending upl wardly on opposite sides of the screen members and adjacent end portions thereof, bracket members pivotally connected tothe links and provided with extensions having sliding connections with the screen members, yielding means interposed between the connections and the extensions, means pivotally and yieldingly connecting the opposite end portions of the screen members together, and means for rotating the shaft.

6. A vibratory screen, comprising a support, a transverse shaft journaled thereon and having-spaced airs of eccentrics, the eccentrics of each pair extending radially in lends of the screen members together,

ly. and downwardly alongside of the screen members, bearing brackets mounted on the opposite sides of the screen members and slidably engaging the extensions, coiled springs surrounding the extensions and interposed between the upper bearing brackets and the rod brackets and brackets and nutsmounted on the lower ends Aof the lower extension, bearing brackets mounted on the opposite side end portions of the screen frames adjacent the links, members having upwardly and downwardly projecting extensions which slidably through the bracket members to connect the screen members together, springs on said extensionsand engaged by the bearing brackets, and means for rotating the'shaft.

7. A vibratory screen, comprising a support, a transverse shaft journaledthereon,

spaced links pivotally connected to one end.

portion of the support, screen members positioned above and below the shaft and pivotalbetween the lower bearing bracket o extend ly and yieldingly connected to the links at one end portion, means yieldingly and pivotally connecting the opposite ends of the screen members together, spaced pairs of eccentrics mounted on the shaft, the eccentricsfof each pair extending radially in opposite directions, bearings connecting the screen members to the eccentrics in pairs to vibrate the screen members in opposite directions both vertically and horizontally, and means for rotating the transverse shaft. f

8. A vibratory screen, comprising a support, a transverse shaft journaled thereon, spaced links pivotally connectedA to one'end portion of the support, screen members posi- I tioned above and below the shaft and pivotally and yieldingly connected to the links at one end portion, said pivotal and yielding connection being 4adjustable to adjust the inclination of the screen members, means yieldingly and pivotally connecting the opposite spaced pairs of eccentrics mounted on ,the shaft, the eccentrics of each pair extendingv radially lOl in opposite directions, bearingsconnecting thereof to vibrate the coacting with said screen members mid-way between the ends thereof to vibrate the same in opposite directions relative to' each other, means for rotating said shaft, and yielding means coacting with said screen members on opposite sides of and remote from said shaft.

10. A vibratory screen comprising, a support, upper'and lowerscreen members osi-- tioned adjacent said support, a shaft journaled on said support and connected to said screen members mid-way between the ends same in opposite directions relative to each portions of said screen members remote Afrom said shaft to said support, and yielding means screen members adjacen said pivotal connect-ing means. f

11. A vibratory4 screen comprising, a support, upper and lower screen members positioned adjacent said support, a shaft journaled on said support and connected to medial portions of said screen members to said members in opposite directions to each other and to balance the weight tl1ere of upon said shaft, means for rotating said shaft, and yielding means coacting with end portions of said screen members. I

12. A vibratory screen comprising, a support, upper and lower screen kmembers posi- ".tioned adjacent said support, a shaft jouring said shaft;

naled on said support and connected to said screenmembers mid-way between the ends thereof to vibrate the same in opposite directions relative to each other, means for rotating said shaft, means pivotally connecting said screen members to from said shaft, and yielding means coacting with said screen members on opposite sides of said shaft. i

13. A vibratory screen comprising, a. support, upper and lower screen members positioned adjacent said support, a shaft journaled on said support and connected to said screen members mid-way between the ends thereof to vibrate the same in opposite directions relative to each other, means for rotatmeans pivotally connecting said. screen members to said support remote from said shaft, and other means yieldingly engaging said screen members remote from said shaft. j

14. A vibratory screen comprising, a support, upper and lower screen members positioned adjacent said support, 'a shaft journaled on saidsupport and connected to said f screen members mid-way between the ends thereof to vibrate the tions relative to each screen members relative to said support.

15. A vibratory screen comprising, a sup- "port, upper and lower screen members posiother, means, for rotating said shaft, means pivotally connecting ing said shaft, means pivotally connecting r sald screen members to said support remote from said shaft, and means for varying the angularly of said screen members relative to said support.

In testimony whereof, I ax my signature. ALEXANDERv L. MUNRO.

vibrate f relative as Y said support remote same in opposite direcother, means for rotat,

ing Said shaft, yielding means coacting with .j said screen members remote from said shaft, and means for varying the angularity of said

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