US2100459A

US2100459A - Jigging machine for concentrating ores and other materials

Info

Publication number: US2100459A
Application number: US21233A
Authority: US
Inventors: Ware Stanley Dawson
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-05-17
Filing date: 1935-05-13
Publication date: 1937-11-30
Anticipated expiration: 1954-11-30

Description

S. D. WARE Nov. 30, 1937.

JIGGING MACHINE FOR CONCENTRATING ORES AND OTHER MATERIALS 4 sheets-sheet 1 Filed May 13, 1935 NOV. 30, 1937. I 2,100,459

JIGGING MACHINE FOR coNcENTRATING oREs AND OTHER MATERIALS s. D. WARE Filed May 13, 1935 4 Sheets-Sheet 2 SI D. WARE NOV. 3o, 1937.

JIGGING MACHINE FOR CONCENTRATNG ORES AND OTHER MATERIALS 4 Sheets-Sheet 3 Filed May 13, 1935 N0v.'30, 1937. s, D. WARE 2,100,459

JIGGING MACHINE FOECONCENTRATING oREs AND OTHER MATERIALS Filed May 1:5, 1935 4 sheets-sheet 4 Patented Nov. 30, 19.37

JIGGING MACHINE F oEEs AND o'rn PATENT-0F 0E VcoNoENTEATING EE MATERIALS o Stanley Dawson Ware, London, o England Application May 13, 1 In Great Britai 935, serialfNo. '21,233 n May 1v, 1934 i 6 claims. (c1. 209-4125)V The present invention relates to jigging machines for concentrating ores and-other materials, particularly of the kind in which a screen submerged in water is given combined vertical eating movements from an designed that quick downward strokes of the screen alternate with comparatively slow upward strokes thereof, and quick horizontal strokes towards the feed end of the machine alternate with comparatively slow lhorizontal strokes towards the discharge end of the machine, the quick horizontal strokes of the screen towards the feed end of the machine synchronizing with the quick falling strokes thereof.

As a result of this motion there is eiected a rapid movement of the material over the screen or bed and a quick separation of the valuesand the waste or gangue with precipitation of the Values into compartments from which they are drawn off as required whileV the tailings pass over the end of the screen. Y

Probably the most successful jigging machine of the vertical and horizontal reciprocating submerged `screen type hitherto in use has beenl the well known Hancock jigger, the 25 ft. size of which will treat under favourable conditions V600-800 tons of a simple ore in 24 hours. The machine, is, however, large, cumbersome and costly and is actuated by mechanism notY well adapted to the essential quick Vibration, and is provided with a screen of excessive weight and size producing destructive vibration and giving a capacity greater than required by the usual scale of operations. Y

Improved designs were attempted by my pre- Vious modification of the Hancock, referred to in specification of British Patent No. 166,490 as also by the Franz and Groppel moving screen jiggers referred to in United States specification No.

1,160,502 and English specication No. 253,139 respectively, as well as by exaggerated sizes oi plunger jiggers, such as the May, New Century, the Bull, the Coolie Jig and others, but with only partial success.

The present invention has amongst its objects to provide a jigging machine of the general character herein referred to of a more favourable cost, size, capacity ratio than former designs. 1

It further aims so to reduce or minimize the transmission of vibrato-ry forces through the machine that the action of gravity on the ore bed and gangue is permitted to take place with greater freedom from outside disturbing forces.

, It further aims inter alia to improve the meth- Lod of'supporting the working parts, to improve the appliances for preventing the vibrating parts from striking the cams,V to reduce thelimpact shocks of the .reciprocatingV screen, to provide more readily adjustable screen action, amore reliable horizontal motion, to permit higher speed 5` and emciency, to reduce? lthe weight Yand cost of the bodywork and mechanism andv to permit the head motionand screen to be removed as a-unit when desired without derangement of adjustments or bedding. i n The invention is illustratedmore ina diagrammatic sense'byway of example by the-accompanying drawings, in'which:A`V

Fig. 1 is a side view of the complete machine. Fig. 2 an end elevation of the-same. Y Fig. 3 a plan of the same. Fig. 4 a sectional elevation of the screw adjusters. l

Fig. 5 a sectional Fig. 6 a sectional tion facerier. v

Fig. 7 a plan of the same with the Y Fig. 8 a side view Fig. 9 a plan of th In carrying the present invention into eiectaccording to thevconstructional form shownVV in the accompanying drawings, the tank body l med of parallel side and converging bottom Vand end plates is shaped similarly to that in the, conventionalv form of a Harz jigger and supportplan ofthe same.- l elevation of a horizontal mon cam and cam` follower on a sliding-carcam omitted, of extensiblebuifers-- e same. Y

practical` whereby not only isY the action material permitted t freedom from outsid tank body construction o of gravity on the 0 take place .with greater1 e vdisturbing forces,V but al f reducedV weight and cost.' is made possible; r.For example a'. thinner gauge of steel plate may be used for the tank body whichA may be machine Vpressed and flanged by existing,- screw or other presses.

The upper portion of the be reinforced with such m wood lagging on the interi steel side plates mayV aterial as substantialv or andthe lower por- 2 tion may be braced on the interior with angle or other section bars or stiening pieces.

As shown such supporting means take the form of vertical standards or frameworks 288, 288 supported directly from the foundations of the apparatus, a concrete bed or floor for example, these standards or frameworks 288,288 preferably having no rigid or positive connexion with the tank body They may, however if desired, for constructional convenience, form attached or integral parts of the cradle or like supports 2 and serving in such a case as additional vertical tank body positioning and lateral supporting members to those designated by the reference numeral 2.

On such vertical standards or frameworks 288, 288 are mounted

girders

3, 3 so as to be supported thereby free from the tank body and on these

girders

3, 3 is mounted the head motion for imparting the combined vertical and horizontal reciprocating movements to the screen which is suspended and vertically and horizontally reciprocated as hereinafter described.

The head motion preferred for the purposes of the present invention is one which, as shown, consists of a single shaft 4 mounted in bearings 48 adapted to be driven from any available source of power, for example, through the fast of a pair of fast and loose pulleys 5.

On each end of the shaft 4 is mounted to rotate therewith a peripheral jumping cam I6 (Fig. 2).

A feature of the present invention consists in effecting the horizontal reciprocating movements of the screen by a single cam coupled in the preferred form of the means for transmitting the motion of the cam to the screen with a single transmitting unit for that purpose. y

Thus to the left of the right bearing 48 (Fig. 1), a single face-jumping cam 6 preferably having alternative tracks 6| and 62 is also mounted on the shaft 4 to rotate therewith, this cam 6 by its rotation imparting the go strokes to a roller cam-follower 'I on a reciprocating carrier S which is slide guided on guides 9 fixed to the right girder 3 (Figs. l, 6 and 7), and whose quick-return motion is produced by the compression springs 98, 38 interposed between stops on the guides 9 and the corresponding face of the carrier 8.

Injurious contact between the carrier 8 and the cam 6 at the completion of the quick-return movements of the carrier is prevented by arranging a yielding stop, e. g., a rubber cushion 22 to receive and lengthen the impact of an appropriately adjustable head 228 mounted in the carrier 8 (Fig. 7).

A further feature of the present invention consists in arranging the go stroke of the carrier 8 or an equivalent thereof to be yieldingly transmitted to the suspended screen so that the resistance of such screen to partake of such movement shall be gradually overcome until suicient energy is stored up for such purpose.

As shown by way of example, the means for so yieldingly transmitting the go stroke of the carrier 8 to the screen I (towards the discharge end of thev machine) takes the form of a laminated spring cross bar I0 with which the carrier 8 makes forked engagement, the spring I8 horizontally bridging the longitudinal sides I2 of the screen and being connected thereto by flexible joints (not shown) so as to accommodate swinging` movements of the screen and/ or the positioning of the screen so that it may be inclined to the horizontal downwards towards the discharge end of the machine.

The quick-return horizontal strokes of the screen I I are eected, on the passing of the peak point of the cam 8, by stored spring energy, for example, by the energy stored in compression springs I4, the return strokes being stopped by preferably adjustable yielding buffers l5 which may conveniently be of rubber.

The action of the cam 6 and the co-operating spring I8 is so elastically to impart the go stroke to the screen II that the sum of the resistance ofthe inertia of the loaded screen and the resistance of the springs I4 is gradually overcome until suicient energy is stored in the spring |8 to overcome such resistance.

In this way the head motion is largely protected from impact shocks in imparting the desired horizontal reciprocating movements to the suspended screen I and conduces to allowing the machine to be run at higher speeds than hitherto.

The forking 88 of the carrier 8 readily permits the screen to be adjusted so that it inclines to the horizontal, if it is desired to be worked in such a position.

For suspending the screen and producing the vertical reciprocating movements thereof, vertically lslide guided bridges |1 are mounted crosswise over the cams I6 on slide guides rising from pillars 2|, and from the ends of the bridges I1 the screen II is suspended by rods I8 having horizontal pivotal connections at their lower ends with the longitudinal side members I2 of the screen I|.

At their upper ends the rods I8 are screw nutted above semi-spherical bearing washers |98 so that the screen is permitted to swing freely.

The rods i8 are extended upwards sufficiently to allow the screen to be adjusted and operated in an inclined as well as in a horizontal position.

Nuts and if desired spring washers ISI are also applied to the rods below the vbridges in order to allow the weight ofthe bridges and the pressure of springs hereinafter referred to, to assist in the essential quick-fall stroke of the screen As shown more particularly on an enlarged scale by Figs. 4: and 5k each slide portion of each bridge I'I is tted with a fixed internally screwed sleeve |82 through which is screwed an externally threaded sleeve |83 which has an impact head |84, the position of which, for contacting with a yielding stop, for example, a rubber cushion |85 On the top of the pillar 2|, may be adjusted t0 and from the underside of the bridge Il and when adjusted locked by the nut |88.

The go or rising stroke of the bridges is arranged to compress cylindrical compression springs |81 interposed between the locking nut |88 and locking nuts mits the pressure of the springs |81 on the bridges I1 to be regulated.

By adjusting the sleeves |83, not only is adjustment for wear provided, and injurious contact of the bridges with their co-operating cams prevented, but the impact of the falling weight may be so controlled as again to conduce to running the machine at higher than the usual speed.

By a further feature of the present invention the usual fixed yielding stopsk I5 are replaced by adjustable yielding stops permitting the horizontal impacts to be received and absorbed at any desired point towards the termination of the quick-return strokeof the screen thereby further conducing to reducing the excessive vibration of previously known machines.

As shown such adjustable yielding stops preferably take the form of linkages 388, 38| and 385 |89 whose adjustment per-I rubber block 304 is gripped against a wedge Sii'iY which can be made to advance or retire behind the block 304 by a screw adjustment 368.

In the present apparatus high carbon steel wire screening is preferably used, stretched on a steel frame reinforced with light steel rod bracing to prevent distortion.

In the present apparatus the vertical frames 2 supporting the screen il and head motion may be loosened without dismantling, when the screen for replacement repairs or renewals.

In the present apparatus light removable wood internal partitions reciprocating and rotating parts special alloy are' rendered independent of lubrication and attention for periods of many months.

The constructional details specified herein as single driving shaft, vertically and horizontallyl extending cams tted on said shaft, transverse members or bridges from which the screen is suspended, and vertical cams co-operating with said transverse members to impart vertical impulse strokes to said members and the screen a horizontal reciprocating carrier, a horizontal spring bar tached pulse strokes being imparted to theV screen by the horizontally extending cam through the medium of said horizontally reciprocating carrier engaging said horizontal spring bar. f Y

V2. Jigging machine for concentrating ores and other materials of the vertical and horizontal reciprocating submerged screen type referred to, comprising in combination a screen, reciprocating bridges from which said screen is suspended, a single driving shaft and peripheral jumping cams on said shaft co-operating with said bridges` for causing a vertical reciprocation ofl said bridges and the screen, said cams and said shaft being situated beneath said bridges, a single facial cam on said shaft for causing a simultaneous horizontal reciprocation of the screen, and a horizontal spring bar bridging the screen and connected thereto, through which bar the horizontal impulse strokes are transmitted to the screen.

3. Ajigging machine as in claim 2in which there is combined with the facial cam, a cam follower, a reciprocatable holder on which said cam follower is mounted, the spring cross bar' with which the carrier makes engagement being connected to the screen by flexible joints.v

4. A jigging machine as in claim 2, in which there iscombined with the facial cam, a cam follower, a reciprocatable holder on which said cam follower is mounted, the spring cross bar Withrwhich the carrier makes engagement being connected to the screen and means for adjusting said cam follower.

5. A jigging machine as in claim 2, in which the facial cam, has alternate tracks, and combinedtherewith is a cam follower, a reciprocatable holder on kwhich said cam follower is mounted, the spring cross makes engagement :being connected to the screen.

Y6. Jigging machine for concentrating ores and other materials of the vertical and horizontal reciprocating submerged screen type referred to, comprising in combination a screen, transverse bridges from whichsaid screen is suspended, a single driving shaft and peripheral jumping cams on said shaft cooperating with said bridges for causing a Vertical reciprocation of said bridges Aand the screen, said cams and said shaft being situated beneath said cam on said shaft for horizontal reciprocation means in the form of a spring cross `bar connected` to the screen and through which the horizontal impulse strokes are transmitted to the screen, extensible screen adjusters fittedon said bridges, spring means arranged to be energized by theV rising stroke of the screen, and striking cushions arranged to receiver and lengthen the impact of the falling screen and bridges and prevent injurious contact of the reciprocating parts with the cams.

STANLEY DAWSON WARE.

bridges, a single facial causing a simultaneous bar with which the carrier A of the screen, yielding V