US1707251A - Shaking and screening apparatus - Google Patents

Description

April 2, 1929- M. o. cED ER'Qulsr 1,707,251

SHAKING AND SCREENING APPARATUS Fileq Feb. 25, 1927 2 Sheets-Sheet 1 April 1929- M. o. CEDERQUIST 1,707,251

SHAKING AND SCREENING APPARATUS FiledfFeb. 23, 1927 I 2 Sheets-Sheet 2 V I i E D? [I5 4. i7 E 33 50 32 V amwxmw Patented Apr. 2, 1929.

MILTON o. GEDERQUIS'T, on BUFFALO, NEW YORK.

SHAKING AND SGREENING APPARATUS.

Application filed February 23, 1927. Serial No. 170,174.

This invention relates to screeningappa: ratus ottho kin-din which the screening oi:

the material is assisted by a shaking or 1nove-' merit of the screening device or member.

The objects of thisinvention are to orovide a screening and shaking apparatus oi simple and eliicieirt construction which so made that the movable grating members of the ap paratus may be readily removed and replaced bv others so that the apparatus may he read ily adapted for screening ditlerent sizes o'li materials; also to construct an apparatus of this kind. in such a manner tliat all the bean ting surfaces are so arranged that they are not exposed to the material which is being so 'cened; also to provide means t improved uction for imparting oscillatory movement in dili'erent directions to alternately arranged bars or men'ibers; also to improve the construction of devices of this kind in other respects hereinafter specified.

in the accompanying drawings, h

hi I a side elevation of a shaking and screening apparatus on'ihodying this invention. i

Fig. 2 is atop plan View thereof;

Figs. 0 and 4t are agmientary,longitudisectional elevations thereof, showing the Off the apparatus in different positions. his. 5 is a fragmentary, transverse, section l elevation thereof on line 5+5, Fig; r 1g. 6 a rfragmentary side elevation thcreo' on. line (3-($, 2.

7 is a tragmentaiy, sectional plan view cot on line i 7., Flog; 5.

Fla, 5% is a .t'r; 'ienlary, transverse see tionzil ole-ration i, re apparatus, showing the apps; lns rise-d tor shaking: a screen.

9 is a siuiilar View thereof showh igthe par thereof in dii'l'ereut positions. L

A and Al represent the side wallsot the apparatus Whi ch may bemade of metal or oi any other suitable material an d on Which the parts oi the zpparatus are preterably sup ported. These Walls are spaced apart so that the material to be screened or otherwise acted upon passes between thetwo side walls and upon the inclined screening or grating surhice arranged between these Walls.

lho mechanism for imparting movement or tor shal-iinp; thoscreeninp; or grating suriaeo pro-l" ably includes a plnrality of oscillatory frames, each including a P811 of cross liars extending traniwerscly of the screening apparatusy the ends of the cross bars being connected with oscillatory members or disks mounted respectively on the side Walls A A in anysuitahle or desired manner. Preferably the mechanism for imparting movement to the oscillatory or shaking -frames is mounted on the outer faces of the Walls A and A so as to be protected from the material Which is being; acted upon. In the particular construction shown the oscillatory end members or disks of the frames are arranged in two pairs, one pair B, B bcingarrange'd near the upper rear Jortion oi the side Walls and the other pair ll", 13 being arranged near the lower front or discharge portion ocl' the Walls, so that the screening surface may be arranged at an inclination, but it will he understood that any desired number of shaking or oscillating frames may be employed, if desired. Each of these oseillatory cnd menxbers as shown is in the form of adisk or Wheel having flanges 14 and is mounted on a pair of rollers 15, \vhich arespaoed apart and the peripheral portions of which extend between the flanges 14 ot the-disks B, J". The rollers 15 are suitablymountedon studs or axles 16 secured on brackets securedto the outer faces of the side Walls oft-he apparatus in any desired manner. Oscillatory motion may be imparted to the oscillatory end members or disks B, B in any suitable or desired manner. in theparticular construction shown an eccentric C is provided mounted on a rotary sha tt lgandthe eccentric strap 20 thereof is connected through a connecting rod or pitman 521 \vith an arm 22 extending outwardly tronrthe upper oscillatory member or di 'ikli. The lower oscillatory member or dk B, which is preferably. identical in cons auction with the upper one, has its arm 22 connected W ith the correspon din g arm of the upper disk or oscillatory end member by means of a connecting rod 24, the ends of which are pivotally connected with thetwo arms of the oscillatory disks. Consequently the rotation of the eccentric C will impart oscillatory moven'ientto the upper oscillatory member or disk through the pitman 21 and similar moven'ient is imparted to the lower oscillatory member ordisk by the connecting rod 24. The oscillatory members or disks 1% and at the op posits side Off the apparatus may be actuated m a similar manner by another eccentric preterably also mounted on the shaft 19. The particular pivotal mounting for the end nien'ibers or disks 1%, BQB and 58 shown in the drawings, as well as the means for imparting oscillatory motion thereto are shown only for purposes of illustration and it is not intended to limit the invention to the particular'constructions shown. I e

The disks B, B and B B of each pair are connected by meansof a pair. of transverse bars D, D which extend through the side Walls A, A and crosswise of the apparatus, and the ends of these cross bars are suitably Journalledin the oscillatory disks at opposite sides of the apparatus, eccentric to'the axes of rotation thereof and toward opposite sides of theoccnter or axis of rotation of the disks. Consequently the oscillatory disks B, Bfand B B and the cross bars or members i D, D connected therewith constitute shaking frames, and as the disks are osc'illatedthe cross bars or members D, D will move in opposite directions in arcs of circles concentric about the axis of rotation of the oscillatory disks or end members of the trainee.- The cross bars, as shown, extend through slots 25 in'the side 'walls A, A and these slots may he closed by suitable movable closing members (not shown).

:Thecross bars-D, D may be of any shape but are'preferably square or of other polygonal cross sectional shape throughout the major portions of their lengths as lndicated at 27, and the end portions 28 may, for convious'that the greater part of the weight of the-material being screened is alternately supported or partly supported by alternate cross bars, and theaetion of the cross bars is such that when the weight isxsupported on one set of cross bars and lowered by the downward movementof these cross bars, it. comes into (contact with the other set of upwardly moving cross bars, with the result that when the downwardly moving load on the cross bars is engaged bythe upwardly moving cross bar's, approximately twice the shock or impactis given to the load than would be the case f the upwardly moving cross bars CZLHIG into"contactwith the loadwhile the load is stationary or at rest. Consequently the aparana described is very efficient in its action and impartsa decided shaking to the material which'iisbeing scre'enec.

The screening or grating surface illustrated 1n the drawings and supported on the cross bars comprises a plurality of grating members or bars E, E alternately arranged, the alternate grating bars E being connected. to the upper and lower oscillating cross bars D, and the grating bars or member E being connected to and supported by the other oscillating cross bars D. The grating members are preferably so mounted on the cross bars as to be easily removable and replaceable, and for this purpose the grating members lil are provided with downwardly extending cross bar engaging hooks or saddle members 30, which are so formed as to engage three sides of the square portions 27 of the cross bars I). These hooked portions are prei? erably arranged sulliciently below the body portions 31 of the bars E to allow ample room for the movement of the cross bars 1) relatively to the grating bars 15. Similarly the grating bars E are provided with downwardly extending supporting books or saddle members 32 which are substantially similar in construction to the parts 30 of the bars E but are arranged to engage with the cross bars D. These supporting saddle parts or hooked portions 82 also extend suliicicntly below the body portions of the grating bars E so as to allow ample movement of the cross bars D relatively to the grating bars E. E, E may, if desired be provided with flanges 33 of any desired width depending upon the spaces desired between the grating bars, or, if desired, these upper flanges may be omitted.

In order to properly space the down ardly extending supporting parts or saddle members 30 and 32 of the grating bars, lengthuise of the transverse or cross bars D, D, suitable spacing meinbers 35 may be provided which are substantially of channel. or U-sha-po in form and are adapted to iit over the cross bars D, D and to engage at least portions of three sides of these cross bars. Preferabli the spacing members 35 are so arranged on each cross bar as to engage one sidiof a cross bar which is not engaged by the hooked or supporting portions 80 or 32. 'lhese spin-- ing members may be of any desired length, depending upon the spaces desired between adjacent grating bars, and the spacing memhers 35 may be simply placed over the cross bars and held in place thereon by gravity. It w'll be understood that the material to be screened is placed on top of the upper surfaces of the grating bars, and the size of the screenings depends upon the spaces between adjacent grating bars. These spacing members may, if desired, be formed integral with the grating bars, for example, by increasing the width of the hook shaped portions 30 and 32. Since the screening surface is arranged at an inclination as shown in Fig. 1. the hooked or saddle portions 30 and 82 of the grating bars as well as the spacing members 35 will be held in place on the cross bars by The upper portions of each of the bars Sid lllU

llo

Fall

a rmen gravity. When it is desired to remove a a 1- ing member it is only necessary to move the same haclnval'dly and upwardly at an inclina tion to disengage the saddle or hooked portions or 32 thereof from the cross members and this disengagement Will not interfere With the spacing members 35 "when they are set as indicated in the drawings. Consequent ly grating bars which have become damaged or Worn can be readily replaced by others. By providin bearin at the ends of the cross bars, there will he no relative movement, between the cross bars and the spacing members supported thereby, and consequently no Wear on the portioi s of the cross bars which are engaged by the hooked portions of the grab ingr bars, nor on these hooked portions.

In the use of the appa 'atus, the material to be screened is fed to the upper ends of the incline: grating bars E, E and because of the movement imparted thereto by the cross bars, a thorough agitation or shaking of the n'laterial on the grating hers is effected. By arranging the bars so that alternate bars move in opposite directions, the packing of the material between the grating bars is entirely prevented, so that the screen self cleaning.

li he/n it is desired to use the apparatus in connection with the screening of line materials or small particles, a screen member F may be employed as shown in 8 and 9, which may be stretched across the space be tween the two side Walls A, A of the ap iaratus, and, if desired, the side edges of the screen member may he seclired to the side 11115 by means of clanniing bars 36ers shown. in a case of this kind the grating bars F, E Would-serve merely to shake the screen F to facilitate the passage of the material therethrou This shaking elliected by raising and lowering; portions of the screen by means of the alternate grating bars, or, if desired, the screen F may he so supported above the tire-ting bars that the gratin bars merely in i 7 contact the same during; portions of the movement thereof. It is, of course, possible as has already been stated to cause the cross bars ll, l) to act directly upon the screen F by omitting the grating;- bare n], E, but When the grating; bars are used, as shown, substantially all parts of the screen are uniformly shaken.

lVhile the apparatus described is primarily intended for use in connection with the screening of materiz-ils, yet it will be obvious that the construction described may be used in connection with shaking grates for furnaces.

I claim as my invention i l. A. shaking; and SUXOQHlllEZ apparatus including a plurality of oscillatory frames, each including; oscillatory end nienil'iers and a pair of cross bars extending between and connecting; said end members opposite sides of the axes of oscillation thereof, and

nalled In. said end members, grating bars hav hool dentensionsnoi-rotatablygr1p- L) pm said cross bars to upport said grating bars on said cross bars m. rout rotation there on, some of ca id grating bars being; connected with cross ha] arranged at one side of the axes ofoscillation of said frames and the other grating bars beingconnected With remaining cross bars.

3. A shaking an d screening apparatus including a plurality of oscillatory frames, each includin oscillatory end members and a pair of can is connecting said end menihers at opposite sides of the axis of oscillation thereof, grating bars having hooked entensions sliding over and eripaqing three of each of said cross bars of a pair, some of said eating bars being connected with cross bars arranged at one side of the axes of oscillation of said frames and the remaining 'ating bars being connected with the other cross bars, and spacers mounted on said bars for spacing said grating bars fron'i each other.

l. A shaking and screening apparatus including a plurality of oscillatory frames, each incl ud lug oscillatory end members and a pair of cross bars connecting said end inems at opposite sides of the axes of oscillation thereof, grating bars having hooked extensions for engaging said cross bars, some of said grating bars being connected with cross bars arranged at one side of the axes ofoscillation or said frames and the remaining grating: bars being connected with the other cross bars, and tl-shaped spacin members on said cross bars for spacing; said git-ating bars from each other A shakiilig; and screening}; apparatus inclut n52; a plurality of oscillatory frames,

each. includingoscillatory end members and a pair of cross bars comiecting said end n1e1nhers at opposite sides of the axis OfOSGillt1- tion thereof, grating; bars supported on said cross bars each grating bar having USllllPQLl portions embracing three sides of each cross bar upon which it is supported, alternate grratii'nr bars being connected with one cross bar of each frame and the remaining nf-ating bars being); connected With the other cross bars, and U haped spacing members re1novably mourned on said cross bars, each. menr her einhracin three sides of the cross bar on Which it is mounted and including the face not embraced by the grate bars mounted on thatcross-bar and spacing alternate grating bars from each other. 1

6. -A shaking and screening apparatus including side walls, a plurality of oscillatory frames, each including a pair of cross members extending through apertures in said side Walls and across the space between said side walls, and oscillatory end members in which the ends of said cross bars are iournalled,

means arrangedrexterior to said side walls for 1ournall1ng said oscillatory end members, and gratlng bars having slotted portions lit-ted. over and removably supported on said cross bars, said grating bars gr ppmg said cross bars to prevent turnlng of the latter relatively to said grating bars, said alternate 1 of the axes of rotation of said disks, grating bars extending transversely of said cross bars, each grating bar having depending portions non-rotatably and reinovably interlockingwith a cross bar of each pair of disks whereby any bar may be separately removed from the cross bars independently of the others, one group of. grating bars being connected to one cross bar of each disk, the other group of grating bars being connected to the other cross bar, whereby when said disks are oscillated, said cross bars will cause alternate rise and fall of the groups of grating bars, andmeans for oscillating said disks.

'8. Ashakingand screening apparatus incl riding a plurality of oscillatory frames, each frame including alined oseillatory end members and a pair ofcross bars connecting said alined end member-sat opposite sides ofthe axis of oscillation thereof, said cross bars being journalled in the end members, grating bars extending transversely of the cross bars 1 and between said frames, each grating bar having depending portions slid ably and nonrotatably engaging a cross bar of each frame by the descent of said grating bars towards said cross bars, one group of said grating bars "being connected to one cross bar of each of said frames, theother group of grating bars being connected to the other of said cross bars and interposed-between the bars of said first mentioned group, and. means for oscillating said frames'tocause alternate, concomitant,

' opposite vertical movements of said groups of grating bars.

, ;9. A shak ng and screening apparatus 1neluding a pair of oscillatory frames, each frame including oscillating end disk members and a pair of cross bars extending between and connecting said end members at opposite sides of the axis of oscillation thereof, rollers on which said disk members are mounted for oscillation, and. grating bars disposed at spaced agart intervals, one group of grating bars extending between one cross bar of both frames the other group of grating bars extending between the other cross bars, whereby when said frames are oscillated certain sections of the surface formed by said grate bars will rise while the remaining sections will fall u1cO1uitunl'l and alternate in the rise and fall movements during successive oscillations of said frames.

10. A shaking and screening apparatus ineluding a plurality of oscillatory frames, each frame including oscillatory end members and a pair of cross bars connecting said end members at opposite sides of the axes of oscillation thereof, said axes being arranged in an inclined plane, said cross bars being journalled in said end mcnrbcrs and having noncireular portions intermediate said members, grating bars extending between said frame members over said cross bars and having depending portions with lateral slots movable into embraced relation with said non-circular intermediate portions of the cross bars. with the open sides of the slots extending down said inclined plane, one group of said grating bars being mounted on one cross bar of both frames, the other group of grating bars being mounted on the other cross bars of both frames, and means for oscillating said frames to cause alternate rising and falling of said sets of grating bars.

11. A shaking and screening apparatus including a plurality of oscillatory frames, each frame including oscillatory end members and a pair of cross bars connecting said end members at opposite sides of the axes of oscillation thereof, said axes being arranged in an inclined plaie, said cross bars being journalled in said end members and having non-circular portions intermediate said members grating bars extending between said frame mcn'ibers over said cross bars and havingde iiending portions with lateral slots movable into embraced relation with said non-circular intermediate portions of the cross bars, with the open sides of the slots extending down said inclined plane. one group of said grating bars being mounted on one cross bar of both frames, the other group of grating bars being mounted on the other cross bars of both frames, means for oscillating said frames to cause alternate rising and falling of said sets of grating bars, and U-shaped spacer members fitted over said cross bars between said grating bars, wluch are mounted thereon, for holding the latter in spaced relation to one another, said spacer elements also non-rotatably engaging said cross bars and being fitted thereon by descent over the same.

12. A shaking and screening apparatus including a plurality of oscillatory trainee, each including oscillatory end members and a pair of cross bars connecting said end members at opposite sides of the axes of osciliation thereof grating; bars extending between said frames and having depending portions e11- gageable with a cross bar of each tt'ran'ie, part oi said grating bars being carried by one cross bar of both frames the other grating bars being; carried by the other bars of said frames whereby said grating bars will be caused to alternatr-ily rise and fall upon oscillation of said frames, part of said grating bars rising While the others are falling and vice versa, and a screening device disposed above said grating; bars in a position to be struck and agitated by the rising grating bars.

13. A sl airing; and screening apparatus i11- cluding a plurality of oscillatory frames, each including oscillatory end members and a pair of cross bars connecting said end members at opposite sides of the axes of oscillation there-- of, grating bars extending between said frames and having depending portions engageable With a cross bar of each frame, part of said grating bars being; carried by one cross bar of both frames, the other grating bars being carried by the other bars of said frames, whereby said grating bars will be caused to alternately rise and fall upon oscillation of said frames, part ol said grating bars rising while the others are falling and vice versa, and a screening device disposer abet-"e said grating bars in a position to be struck and agitated by the rising grating bais said cross bars being journalled at their ends in said end members, and said end Ineinbers being: disposed beyond the lateral lirn its oi said screening device, whereby the material being screened Will not interfere With the bearings of said frames or cross bars.

14L. A. shaking and screening apparatus including a mesh screen, and an agitating device: therefor and disposed beneath the same, id device comprising alined oscillatory :[rame members cross bars exteadingbetween and connecting said members for oscillations tllfilQWitill, interponent elements disposed between said screen and c1? bars tor transferring movement of the cross bars to said screenw and means by which said frame mem here may be oscillated.

MILTON O. GEDERQULT.

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