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Publication numberUS1293556 A
Publication typeGrant
Publication dateFeb 4, 1919
Filing dateMar 9, 1917
Priority dateMar 9, 1917
Publication numberUS 1293556 A, US 1293556A, US-A-1293556, US1293556 A, US1293556A
InventorsAxel L Sandels
Original AssigneeAxel L Sandels
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Mechanical movement.
US 1293556 A
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Description  (OCR text may contain errors)



APPLICATION FILED MAR. 9, 1917- Patented Feb. 4, 1919.


Patanted Feb. 4 1919 2 SHEETSSHEET 2.



Specification of Letters Patent.

Patented Feb. 4, 1919.

Application filed March 9. 1917. Serial No. 153.655.

Be it known that I. AXnL L. Saxnnns, sub-' King of Sweden, residing at (hicago, in the. county of (ook and State of Illinois, have invented certain new and useful Improvements in Mechanical Movements; and I do hereby declare the following to be a full, clear, and exact. description of-the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in mechanism for vibrating screens, particu larly of the type for screening coal and the like, but which is adaptable for screens for all purposes.

The object of the invention is to provide a novel mechanism for imparting to a set of screens a rta-iprocatory motion variable in speed whereby to effectconveyance of the material longiti'idii'ially of the screen over portions of gradually increasing mesh without the aid of additional conveying means.

A further object of the invention is to provide mechanism for reciprocating a screen and conveyor, or a multiplicity of screens at a variable speed, in which the screens move siniultal'ieously in opposite directions at variable speed whereby to balance or partially balance the strains and stresses on the ilCtlh ating mechanism:

further object of the invention is to provide mechanism for vibrating or reciprocating screens and the like, at variable speed. in which the strokes of the screen at high and low speeds respectively, may be adjusted and varied as desired to provide maximum efficiency of operation.

The invention consists in the features of constructi m and conroinatkms of parts hereinafter fully described and particularly claimed.

In the accompanying drawings illustrating a suitable embodiment of my invention.

Figure -l is a view in side elevation of a coal;screening apparatus constructed in accordance with the invention.

Fig. 2 is a fragmentary top plan view of the same.

Fig. -3 is a view in plan section partly in elevation showing the mechanism for operating the variousscreen members, said view being substantially diagrammatic.

Fig. -l is a similar fragmentary section through the completed motioil-transmitting mechanism.

ject of the Fig. -fi is a vertical longitudinal section ofthe same on the line 5 5 of Fig.

Fig. (i is a detail vertical longitudinal section showing the relative positions of the three eccentrics driven at'varia blc speeds for simultaneously imparting variable speed to three. elements.

Figs. T- and are fragmentary detail diagrammatic views illustrating the ditl'erence in direction of feed occasioned by changing the position of the actuating eccentrics relatively to the cranks rigid therewith and connected to the source of power or drive-shaft actuating said eccentrics.

Fig. '!lis a diagrammatic view showing the various positions of the link connecting the disks during one revolution of the same.

In carrying out my invention, I make use of a well-known mechanism or mechanical movement for transforming uniform rotary n'lovement. of one element into variable movement of another member geared thereto by means of a crank on the actuating member connectedwith the actuated memher by means of a link or pitman which, gencrally, is very short. and. during rotation of the crank, becomes positioned at various an gles relative to the driven member of the plane of movement thereof. whereby the latter is moved at a speed varied in accordance with the. variations or diti'erences in angles .of disposition of the link or pitman.

lnthe present invention the. uniform motion of the drive-shaft is first transmitted. as hereinafter fully described, to countershafts, and from the latter to the reciprocating elements for varying the speed of reciprocation of the latter and simultaneously eil'ecting movement thereof in respectively opposite directions.

Referring now to the drawings, 1 in'licates a drive-shaft suitably geared to'a source of power as, for example, by means of the pulley 2. lhe said drive-shaft is provided at one end with two diametrically opposed equal crank arms'3 each equipped with a crank pin.

Disposed axially parallel with and eccentric to the drive-shaft, 1 is a solid countershaft 4. and a hollow counter-shaft 5, the lat ter being mounted on the shaft l, and being rotatable relatively to the latter on the same axis. The shaft -1 is provided with a crankarm 6, and the. shaft 5 with a crank'arm 7,

each of the latter being equipped. with. a crank pin having its axis disposed coin-dis" tantly from the axis of the shaft fl and pref-- ora'bly also spaced radially as far from the axis of the shaft 2 as the crank pins of the crank arms 3 are spaced from the axis of the shaft 1. The spacing of the axes of the shafts 1 and 4 with respect to each other is less than the radial dist-mice of any one of. the crank pins from the axis of rotation of the shaft with which it rigid. A link 8 connects one of the crank pins of the arm 3 with the crank pin of the arm 6 of the shaft 4 and a similar link 9 connects the other crank pin of the urin 3 will: the craukpin of "l in, 7 of the shaft Tho low links 8 and 9 will: respect to the tween on een'lers of the openinor, i gaging "l active crank pins n alao gamer .an the distance sepia fling axes o rotation of the afts 1 and s and pint-l1 eralily equal lo the rm l'inl din-fiance of each oranir pin friun llli axis of 3T1i32ll3l0fl of the shaft with which it in rigid.

The result of this arrangement grannnabically illustri .-:l in F W as dis out upon the, disi'anee between centers of shifts Il and (l. l'froui thisit will be observed ohm, lz-he rounteosha'l' ianal 5 will rotate :2 av variable speed, and that earn thereof will al'tuli'a its greatest; speed of: rotation substantially at :9. time that the other thereof has attained its lea weed. This due to the footthat the crank pins of" the arm E.- of the shaft 1 are diaim-trieally oppositely disposed. and on the assumption thatthe woven-- tries ll? am ll] of 'I'llu sluifls; &- andv 5 am din posed so that the longcr zl: radius of each from the axis of rotation is coincident. with the radius intersecting the crank pin axis of said shafts 4. and shaft 4 is connected by means of an eccentric rod 12 and eccentric strap 13 with tho upper or screen member 1% of the coal screen or the like, adapted to be actuated by the mechanism, and the eccentric ll. of the shaft 5 is simil: .rly connected by means of the ercei'itrie rod 15 and eccentric strap 16 with the other or conveyor member 17, shown in Fig. -1--, it bring obvious, of course. that either of said eccentrics may be interki changeably connected with said members 14 and 17. Another ecrrnt-ric 18 on. the shaft 4' 4 -,l1haf; (lurlng' the half revolution of the lllil'fl} 1- The eccentric ll) of the v n 'll'l wuinh adapted to be fed longitudinally of; the mei'nbors 'l-l and 17 and led into The cars or other meepmeles 23 diinn'isrd bolmv the member In. {Lu-aeolian the member 14; is provided with a foraminons bottom, wall or foraminous portions, in said bottom wall, as indicated at and rcss 'ieetirely, the perforation in the portion El being comparatively small so as to separate all of (be very line particles from lbe mazes of coal or other material. fed upon the screens, and the poi} for liionrs the no ion beioglarger to wed lumps from the i or larger lunnn; pinning Jr of the memlrr illnpon the of l ne member 1'11 and Moi-- tli'er int") the farthlrsl; lelt 7 il Ti niomller 1', n, olir'i nlatlnrni'or with gal d or lllli'nliflll Wlliiili 1 lb? liorliou ll. weigh Ybe porlion "lively. are adapted to Que l'l 'flif-lh 'bil rew rincles; l in of lnis panrhion of rho an z'iarains coiidngul'ing no part. of tho inesient inx'oxuiou.

.he :frr-d member 21 is reciproczdcxl for tweened l nn-prim of fouling coal or other material lo be act-owed upon the member M material to he thrown always in one dircc of said illtllllllfl'I-l, and irahln lo inorwlbem loof' motion beginning relali y 'l with, r' ":mlly in- EITHER :0 an in attain uubslan lially maximum npceil as the forward limit of movement is rrarhc-ib the rrtxurn move ment beginning "very rapidly and gradually deeelorating whereby the supporting surface for (be coal partially withdrawn from momma the luttor so that it, does not, travel back with the said members, but retains an advanced position thereon. and is thus gradually moved from end to end thereof, at the same time being agitated sufficiently to efl'eot the sifting or scrcrning lion longitndiiml lo 1 1 lii-rii: :lo

- desired.

8 and 17.

I posed at an angle of substantially thirtyfive degrees more or less. to the horizontal plane of reciprocation of the members It The variation of this angle will change the point inv the travel of the members 14 and 17 respectively. at which said members attain their respective maximum speeds and minimum speeds. This may fur L ther be changed by varying the position of the eccentrics on said shafts with respect to the crank-radii thereof. Thus. as shown in Figs. T and -8+- if thelongest radius of the eccentric of one of said shafts is dis 15 posed to extendcoincident-ally and in the same direction as the crank pin radius thereofrthe coal or other matter disposed on the .member It or 17 geared to said eccentric will be fed in the direction of the arrow in 20 Fig. 7, whereas. if said eccentric is turned through an arc of one hundred and eighty degrees. as shown in Fig. 8-. the coal or other matter will be fed in the direction of the arrow in Fig. 8. By turning the eccentric of either one of said shafts on the axis thereof relatively to the crankpin radius thereof it will be obvious that the point in the stroke of the reciprocating member connected with said. eccentric at 80 which said reciprocating member attains its maximum speed will be similarly varied. The relative positions of crank pins and eccentrics illustrated in Figs. -1- t0 6- inclusive, and the relative positions of the 36 axes of the shafts 1 and t therein shown are 40 the material deposited on the members 14 and 17, nor to produce the greatest degree of balancing effect on the shafts 1, at and 5 so as to minimize the strains on the latter for increasing the life of the mechanism, as

i5 it will be obvious that this may be readily.

determined by experiment. The balancing effect produced obviates the necessity of mounting the driving element on as heavy foundations as would be necessary were the action of the mechanism not balanced; or

partially balanced.

t will be'obvious. of course, that my invention is adapted to many uses besides that of screening, and may be changed and varied to particularly adapt it 'to any desired purpose without departing from the invention as defined 1n the appended claims.

I claim as my invention:

7 1. In an apparatus ofthe kind specified, a i 60 pair of screens adapted .to bereciprocated,

and means foretfecting reciprocation thereof comprising a counter-shaft having two diametrically opposed eccentrics connected with said respective screens, a cranlepin on 85 said counter-shaft, a 'drivoshaft havingja crank-pin radially equi-distant from'its axis with the crank pin of said countershaft. and axially offset from said counter-shaft a distance less than the distance of said crank Pins from the. axes of their shafts. a link of greater length than the distance between the axes of said shafts connecting said crank-pins. the crank-rmlius oi one'of said eccentrics on said counter-shaft being); coincidental with its crank-pin radius. a plane common to both shaft axes being inclined to the direction of reciprocation of said screens. whereby the latter are simultaneously reciprm-attal at variable speeds in opposite directions.

2. In an apparatus of the kind specified, a pair of reciproeablc screens, a drive-shaft. having a crank-pin, a countershaft parallel with and offset from said drive-shaft a distance less than the crank-rmlius of the latter. a crank on the countershaft having a radius equal to that of the crank of the drive-shaft. a link of greater length than the distance separating, the axes of said shafts connecting said crank pins a plane connnon to both shaft axes being inclined to the direction of reciln'ocation of said screens. and connection between said screens and said countershaft for reciprocating the latter simultaneously in opposite directions, said connection includingan eccentric on said countershat't having its longest radius coincident with its crank-pin radius.

3. In an apparatus of the kind specified, a drive-shaft having two cranks, two countershafts disposed axially parallel with and eccentric to said drive. shaft and each having a crank, a link of greater length than the distance sepa 'atingz the axes of rotation of the shafts connecting each of the counter-shafts with a' crank of the drive-shaft for imparting variable rotary speed to said respective counter-shafts. two relatively re ciprocable members operatively engaged with said respective counter-shafts for causing each of the same to move more rapidly in one direction than the other, andto move simultaneously in opposite directions at respectively different speeds. v

- 4. In an apparatus of the kind specified, a drive-shaft having diametrically opposed crank-pins, two counter-shafts disposed one within the other and each having a crankpin, the axis of said counter-shafts being eccentric to the axis of said drive-shaft, and links of greater length than the distance separatin said axes connecting the respective cran-pi-ns of said counter-shafts with the respective crank-pins of said drive-shaft, an eccentric on' each of said counter-shafts, .and a pair of reciprocable members operatively-connected with said respective eccentrics. 3

5. In ah apparatus of the kindspecified,

.a pair of relatively reciprocable members, a

- end, two countersliafts disposed one within the other and each having a crank-pin at one end, said counter-shafts eccentric to said driveshaft and connectedwith the latter by means of links connecting the crank-pins thereof with the crank-pins of said driveshaft, said links-of greater length than the distance separating the axes of said drive and counter-shafts, the latter disposed substantiallyin the plane of reciprocation of said members, and said driveshaft disposed so that a plane common to the several axes of said shafts will be an'gularly disposed relatively to the plane of reciprocation of said members, an eccentric on each ofthe counter-shaftslhaving its'longest radius in the radial plane of the crank-pin of said shaft. and eccentric rods connecting said-rel spective members with said respective counter-shafts 6. In an apparatus of the kind specified, a pair of relatively reciprocable members,

a drive-shaft having two diametrically opposed cranlcpins at one end, two countershaits disposed one within the other and each having a crnnlc-pin at one end, said counter-shafts eccentric to said drive-shalt the crank-pins of said drive-shaft, said, links being equal and of greater length than the distance separating the axes of said drive and conntershafts, the letter disposed substantially in the plane of reciprocation of said members, and said drive-shaft disposed so that a plane common to the several axes of said shafts will be angulnrly disposed relatively to the plane of reciprocation of:

said members, an eccentric on each of the connter-shaits having its longest radius 1n the radial plane of the erenlepin or said shaft, and eccentric rods connecting said D6 spective members with. said respective comrter-shafts.

In testimony whereof I have signed r in presence of two SllbSCI'llllDg mi.

- AXEL Lt" SANDELS. VVitn esses M. M. BorLn, J; Cl Bnsenerr.

I bosses.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2725984 *Jun 9, 1950Dec 6, 1955Ludwig Binder & CoVibratory conveyors
US5351807 *Mar 23, 1994Oct 4, 1994Paul SvejkovskyDrive mechanism for a linear motion conveyor
US5699897 *Sep 30, 1996Dec 23, 1997Svejkovsky; PaulDrive mechanism for a linear motion conveyor
U.S. Classification74/68, 209/365.3
Cooperative ClassificationF16H35/02