US2446176A - Tilting adjustment for reciprocating concentrating tables - Google Patents

Description

Aug. 3, 1948. G H. GRUSS 2,446,176

TILTING ADJUS TMENT FOR RECIPROCATING CONCENTRATING TABLES Filed June 19, 1945 2 Sheets-Sheet l INVENTORT BY 0% M W KAZZQ Q.

ATTORNEK G. H. GRUSS TILTI'NG ADJUSTMENT FOR RECIPROCATING CONCENTRATING TABLES Aug. 3, 1948.

v 2 Sheets-Sheet 2 Filed June 19, 1945 NW i {a INVENTORT I BY M w AAQZLW 9.

A T TORNE Y.

Patented Aug. 3, 1948 TILTING ADJUSTMENT roe ammo onrme .C'QNCENTRATING; TABLES George H. Grass, San Franoisco', Calif. a piieafionaui e 19, 1945, Serial No. endless '4 Claims. (Cl. 209-504f) The present invention relates to an 'ore,-concentrator of the vibrating or shaking table type.

The principal *ob i'ects o'f the invention are to provide a construction which is both light and sufficiently sturdy "to withstand the stresses -imposed by the vibrating movement; to provide means for adjusting the inclination of the table to enableit to operate properly on difierent grades types of ores; to provide an arrangement of riifies that will not clog with sand; and to provide a simple construction which can he made largely of wood. Other objects and advantagesof the invention will become apparent from the following description, whiohshould be 'read with-the understanding that the form, construction and arrangement oft-he 'severalparts maybe varied, within the limits'of the claims hereto appended, without departing fromthespirit of the invention.

Fig. 1 of the accompanying drawings is a plan view of the complete concentrator, partlybroken away.

Fig. )2 is a partly broken side elevation.

Fig. 3 is a plan "view of a portion of the base frame.

Fig. 4 is a vertical section of the vibrating mechanism, taken on the line"4-4 of Fig. 1 enlarged.

Fig. 5 isahorizontal section-of the tilt-adjusting means, taken on the line 5- 5 ofFig. 2 and nlarged.

The fixed or base frame "of the "concentrator, best shown in Figs. 2 and 3,'eomprises a pair of 319arofll'el horizontal stringers ll set on edge on transverse sills 12. Spacers '18 extend between the str'ingersfll andare notched thereinto, as shown. Bolts I 4 extend through the stringers and spacers to hold the frame together, The *str i-ngers lll carry journals l5 fer two transverse spindles 16, on which are mounted grooved wf'l zeels "fl 'l, the'grooves or which are aligned longitudinally of'the' irame.

The shaking table comprises a rectangular wframe, Figs. 1 and having longitudinal side members !8 and transverse members =i'9 "notched thereinto, held together by transverse rods or bolts Z ILand a *flattop sheet-21 secured to said frame members in any suitable manner. At one corner of the tablets a distribution loox 2-2 into which the crushed ore to beclassified is ted by an-appropriate chute mot shown). One side of box has arow of discharge'holes 23 spaced slightly above the table 'top; through which the ore is fiedto the table. hnyilarge @afiticles which may he'carri-ed in with thecrus'hed ore are caught in tlue box 2 2, and can be removed therefrom.

Ill

i The surface of timetable is provided vv ith a series of 'ri'files =24. The first few ri ilies lla, opposite the distribtitionbox 22, are shortpek' tending from the left 'handend of memoir: tofa point slightly bey'ondthe right handenclof said box. "The succeeding fillies 2% areoi progres sively increasing length, the lastf eneilc extending the full length bf the" table. "The last few rifiles, viz: the longest onesyare inclined-eit their left hand ends for :a portion or their length, as, shown at 24d, but from there onl 'they are straight and parallel "with the longer sides of the table, asare 'all the otherri ffles. l

and taper downwardly toward their r igh t hand ends. In actual practice they are about five sia tcenths of an inch high at' iihe lefit han'd end and about one sixteenth of an inch a't the right hand end. a a

i The table is surrounded by a 'raisedrim -formed' 'by flat woodstr'ipsifi *securedtothe side and end frame members and'extending :a= ew inches above the topof the table. This rim' extends: lor the fulllength-of thehack side of the table, as shown at 2511; for the full length of the lefvhand end, as at 251); a short way along the front side asha'at 25c and more thanhalfway along the righth'and end as ati'ZBd. For the remainder of the length o'fthe front side, the table top extends-islightly over the front frame member to term audisc'harge lip 26 for the "fines or lighter matenialpandiat the front :portion or the right hand end radischarge -lip z' l for the heavier material :is' formed by a fiat sheet insertedheneatli fthe ta'ble top: and extending beyond the endrrame member.

A "steel cylindrical tubular member 281 extends centrally the long way- :of the table, passing through the cross frame members? 1:9earned.:"heing rig-idly secured :itheretoby suitable .OGIIBESp one of which is shown at 29. The member rests upon the grooved rollers 1 1, thereby supporting the table and permitting it to have lengthwise shaking movementandlalso tilting movement' rthe latter for adjusting purposes as later explained.

The tubular member 28 extends beyond %one end of the table and is :connectediby a'rod' 38' with a box-l'ike cam following. yoke 3 Figs :abnd 4. cam 32 mounted on a rotating shaft 33 operates within the yoke 3|; and "by contact Withm-bronze wear plate 34 in said yoke moves the itaiblletoward the left at each revolution of the cam. The return movement is caused by springs, laterde- .scr-ibed. I Slots '35 in the sides of the yokeiwl :prevent it from turning *by guiding fit on thefi cam shaft. A lubricant rcontaining housing 36 Lenparent-from the foregoing description.

tively movably rotatively and fixedly for unison being run.

movement longitudinally free of lost motion therebetween.

The table is horizontal lengthwise, but is tilted slightly down toward the discharge side to cause-- the lighter material to flow over the riflles. The degree of inclination will depend upon the char-' acter of material being run. To provide adusti- L1:

ment for such lateral inclination, and also to hold the table in such adjusted inclined position, the following mechanismjis provided, as shown in, Figs, 2 and 5. An arm Allis fastened to the central tube 28 at Mandextends downwardly therefrom betweenthe base frame members H. l

A bracket .42 extends out laterally from one of said frame members I I. An adjusting screw 43 ,is threaded through the outer end of said bracket. A push rod -44-extends through an aperture in thez'side frame membenbetween the screw 43 and the lowerend of the arm 40, Tension springs 45.extend between the outer end of the bracket and to a cross piece 46 secured to the arm flfl. The arm is movedaway from the bracket by turning in the adjusting-screw 43, and is returned by-the-springs .when said screw is backed out. The ends of, the push rod are fitted to the screw and the armwith conical or cup and ball joints as indicated at 41, so that said rod will not drop out and to provide flexibility to accommodate-the reciprocating movement of the :arm, lengthwise of the frame, with the shak- =ing table to which-it is attached. A lever 48 is provided forturning the screw 43, and a hand wheel-fl is-threaded thereon to serve as a lock nut.

wSprings 50 are-provided-for maintaining contact between thecam 32 and the wear plate 34 of itsfollower. Said springs are attached atone end by eye bolts 5I'to'a cross member I3of the baseframe'and at the other end to'a'yoke 52 whose threaded shaft extends through the upper portion of the arm 40 and is provided with adjusting and lock-nuts '53. Thesprings 50 tend to pullzthe table towardthe right, holding the followerv in contact with the cam to prevent knockingv or hammering,

' The operation of theconcentrator will be ap- With the cam 32 rotating, the table is-given an endwise shakingv movement and is held at the desired lateral inclination by th tilt-adjusting mechanism 40 to'49. Crushed ore from a stamp mill is washed into the distribution box 22 with water, and flows out through the discharge holes particularly theinclination of the forward ends 2401 of the last few riilles,prevents the trQublesome clogging which frequently occurs at this region of shaking table concentrators of usual construction.

The construction of the shaking table, with its rigid back-bone member 28 resting on the grooved rollers l1, provides a firm and stable mounting and distributes the strains due to sudden acceleration and deceleration throughout the entire table; preventing, undesirable lateral or vertical components of the shaking motion, and also permits quick and accurat adjustment of -the lateral inclination to suit the particular ore The design of the entire structure lends itself to wood construction, with a minimum of presentlyscarce steel. The base frame is entirely wood The table frame is wood except for the back-bone member 28. The table top can well be made of a single sheet of hard surfaced pressed wood or fiber, and the riflles can be wood strips cemented thereto.

1. An, oreconcen-trator comprising .a base frame, longitudinallyaligned grooved wheels rotata'bly mounted thereon with grooves in alignment relatively, a movable table mounted above said base frame, rifiles on said table for classifying the ore passing thereover, a longitudinally directed backbone member beneath vsaid table secured rigidly thereto, said back-bone member resting longitudinally recipr-ocalbly and axially rotatably movable in the grooves of the .wheels of said base frame and thereby supportingsaid ta'ble, means for imparting longitudinal reciprocating movement to said back-bone member and said table in unison, and means for adjusting the rotative position of said back-bone memher to vary the lateral inclination of said table.

2. An ore concentrator comprising an elongated base frame having longitudinally aligned grooved wheels rotatably mounted with grooves in alignment relatively, a movable table mounted above said base frame, riflles on said table for classifying the ore passing thereover, a longitudinally directed back-bone member beneath said table secured rigidly thereto, said back-bone member resting longitudinally reciprocably and axially rotatably movable in. the grooves of the wheels of said base frame and thereby supporting said table, a cam mounted at one end of .said base frame, a cam follower having longitudinally fixed connection with one end of said back-bone member whereby they move longitudinally in to hold said. follower in contact with-said cam, 7

means forv rotating said cam to impart longitudinal reciprocating movement to said backbone member and said table, a swivel joint connection between the cam follower and the backbone member, and means for adjusting the rotative position of said back-bone member to vary the lateral inclination of saidtable. l

3. An ore concentrator comprising a base frame having longitudinally aligned grooved wheels rotatably mounted thereon withgrooves in alignment relatively, a movable table mounted above said base frame, riflies on said table for classifying the one passing thereover, a longitudinally directed back-bone member beneath said table secured rigidly thereto, said back-bone member resting longitudinally reciprocably and axially rotatably movable in the grooves of the wheels of said baseframe and thereby supporting said table, means for imparting longitudinal reciprocating movement to said back-bone memher and said table in unison, an arm secured to and extending downwardly from said back-bone member, and adjusting means connected with said arm and said base frame and arranged to swing said arm laterally to vary the lateral inclination of said table, said adjusting means having flexible connection with said arm to permit the longitudinal reciprocating movement of said arm, said means for imparting reciprocating movement and said back-bone member having fixed longitudinal connection therebetween whereby they move longitudinally in unison.

4. An ore concentrator comprising a base frame having longitudinally aligned grooved wheels, a movable table mounted above said base frame, riifles on said table for classifying the ore passing thereover, a longitudinally directed backbone member beneath said table secured rigidly thereto, said back-bone member resting movably upon the wheels of said base frame and thereby supporting said table, means for imparting longitudinal reciprocating movement to said backbone member and said table, anarm secured to and extending downwardly from said back-bone member, .a :bracket extending laterally from said base frame, a laterally movable adjusting member mounted on said bracket, a push rod 'between said adjusting member and said arm whereby movement of said adjusting member swings said arm laterally to vary the lateral inclination of said table, and a spring connecting said arm with said bracket to hold said arm, said push rod, and said adjusting member in contact.

GEORGE E. GRUSS.

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

UNITED STATES PATENTS Number Name Date 763,785 Overstrom June 2 8, 1904 869,860 Shepard Oct. 29, 1907 1,026,764 Overstrom 'May 21, 1912 1,051,049 Wright Jan. 21, 1913

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