US1745305A - Jigging mechanism - Google Patents

Description

"Jui'. 28, 1930. I M. J. LIDE ,7

JIGG-ING MECHANISM Original Filed Aug. 2, 1924 6 Sheets-Sheet 1 3 min MmzTm J.LIDE

Jan. 28, 1930. M. J. LIDE JIGGING MECHANISM 6 Sheets-Sheet 2 Original Filed Aug. 2, 1924 FL yqZ rwenbm. MQRTINJ. L\ DE.

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Jan. 28, 1930. M. J. LIDE JI-GGING MECHANISM Original Filed Aug. 2, 1924 6 SheetsShevet 6 7 5 i I i Q N11 R 33: T i

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MQRTLN J. LIDL Patented Jan. 28, 1930 i i UNITED STATES PATENT OFFICE.

MARTIN J. LIDE, OF BIRMINGHAM, ALABAMA J'IGGING MECHANISM Application filed. August 2, 1924, Serial No. 729,672. Renewed August 6, 1928.

My invention relates to certain new and sively removed by varying the intensity and useful improvements in jigging mechanism, frequency of the impulses or of the agitation which in the embodiment presented is more imparted to the material on the jig screens. particularly designed for the treatment of According to my present invention, the difiercoal but which is obviously applicable to the cut treatments in the successive jigs is con- 5 treatment of other materials which require trolled by several factors, such as the difierseparation by flotation methods. ence in head between the supply water and the In Letters Patent No. 1,491,870, issued to jig tank, and the variation in the intensity, me on the 29th day of April, 1924, I have duration and frequency of the impulses, which 1@ illustrated and described a jigging mechafactors are severally subject to control wherenism wherein opposing synchronous imby I effect the desired treatment at each stage. pulses of water were admitted to the jig tank In View of the fact that there is, in the type below the screen under the control of valves Of in question, a uni-directional flow of substantially coextensive in length or width Water through the jig screen, which causes a 15 with the side or end of the screen, according relatively large flow of water, it is desirable t th i arrangement, One of the principal to make provision for utilizing this in the objects of my present invention is to imsuccessive stages and to this end my invention prove and perfect the valve mechanism for contemplates the setting of the successive jigs controlling and regulating the impulses of at decreasing levels throughout the stages 2.0 Water delivered to h ji t k d t thi and utilizing the water as it flows from one end I contemplate, broadly speaking, the to another tank to supply the needed head at tili ti f lti t d lv h by, each tank to induce pulsations of the required with a relatively short movement, the ported v loci y in each Stage without any other 4 area of the valve can be fully opened and power than gravity. In order to make the closed, such movement being either reciproca- W er thus successively available for the jigs tory, oscillatory or rotary, as may be desired. I p de a Scre n between each two stages in More particularly my invention contemthe sluice way over which concentrates from plates certain improvements in the preferred 0116 pg k HOW to the neXtsucceeding jig, t f 1ti -t d Valve hi h i f th the water removed by the screen from the conoscillatory type and designed so that with a atcs being del vered to the supply tank i i f -i gi d a l ti l h t of the succeeding ig and such part thereof stroke the valve may be fully opened or closed as S 1H Q a the requirements of the and permitting the opposing valves to be ndary 1 g, 18 dlvcrted by a pass means to gry gin ply connected for both a joint and the SQlltllllg tank 01 the return circuit,

synchronous movement. Moreover, the valve y lnlellvtlon further contemplates i111 l d it lf t i li it i t ti provements 1n the means for controlling the cessibility, minimum friction, and a low cost S1%Lt6 g S0 at he cXtcnt to which the gate b th f od ti d ai t 1s opened and its timed relation to the im- My invention also contemplates the designp es of Water flowing through its respeclng or the jig tank below the screen with pastlvc 11g screen can be controlled d varied sages tor the water impulses which are formed S0 as to pr e the bes operating results. by urved urfaces designed fo gli ninatjng lllVGlltlOl'l COlllZBlllPlittGS that tllG GXtGllt OI any settlement or eddy space and causing the the slate gates opening shall be controlled by impulses to flow with the least possible frica change in leverage in its actuating mechatic-n or disturbance directly from the valves nism, and that its timed relation to the imto the j screen. pulse shall be controlled by an adjustment of ll Iy invention relates to certain improveits actuating mechanism in combination with ments in adapting the type of jig in question an overlapping of the gate below its port.

for multi-stage jigging wherein refuse of rel- My invention further contemplates an imatively decreasing specific gravity is succesproved type of jig screen designed to elimi' nate dead spaces on which material can rest above it and to reduce to a minimum the loss of head to impulses flowing through it.

My invention also comprises the other novel details of construction and arrange ment of parts, which in their preferred embodiments only are illustrated in the accompanying drawings which form a part of this specification, and in which Fig. 1 is a plan view of a single stage multiple jig in accordance with my invention.

Fig. 2 is a cross-sectional view on the line 2-2 of Fig. 1.

Fig. 3 is a view corresponding to Fig. 2, showing a modified type of valve and slate gate operating mechanism.

Fig. 4 is a vertical cross-sectional view taken on the line 4-4 of Fig. 1.

Fig. 5 is a detail view in perspective of the preferred type of valve with its seat partly broken away.

Fig. 6 is a transverse cross-sectional view through a portion of the valve in its seat.

Fig. 7 is a detail view illustrating the slate gate operating mechanism.

Fig. 8 is a vertical cross-sectional view through the slate gate and the discharge end of the jig screen.

Fig. 9 is a perspective view of the discharge end of the jig screen with the slate gate, weir plate and sluice way, partly shown.

Fig. 10 is a detail cross-sectional view through a part of the jig screen.

Fig. 11 is a plan of a multi-stage jig in accordance with my invention.

Fig. 12 is a longitudinal vertical crosssectional view taken on the line 12-12 of Fi 11.

ig. 13 is a detail view of a part of the screen between the jigs.

Similar reference numerals refer to similar parts throughout the drawings.

In the embodiment of my invention illustrated in Figs. 1 to 10, excepting Fig. 3, 1 show a jigging mechanism comprising a storage bin 1 suitably supported by columns 2 and having a rotary feeder 3 which controls the rate of feed of the material to be jigged down the chute 4 and onto the screen in the jig tank 6. The screen, as shown more clearly in Fig. 10, is formed by a series of bars having their ends shaped to abut and rest on the seat 7 provided in the end alls 8 and 9 of the jig tank. The intermediate or working portion 10 of the bars is shaped to form between them passages for the flow of the water which converge upwardlyto a minimum intermediate orifice and then diverge to the top surface of the screen, thus providing passages of an approximate Venturi type whereby the water passes through the screen with the minimum loss of head. There are no dead spaces left on top of the screen since the screen bars along their upper surfaces are reduced to sharp edges. This leaves no surface upon which any particles on the screen can rest without being subject to impulses of water flowing upwardly through the screen.

At its discharge end the wall 8 is offset to provide a guide 11 into which the slate gate 12 can drop for a substantial distance below the top level of the screen. This overla 'iping of the gate is provided as a means to permit the extent of its opening movement to be controlled in the manner which will be later described. The gale itself works in guides 13 set in the concrete or other structure of the jig and this guide also carries a weir plate 1 1 which is ruljustably bolted to it. An angle 15, secured i n the masonry, supports the upper end of a sluice way 16 down which the concentrate and evuflow water pass to the settling tank 17, where a bafilc 18 is provided about the point of inflow of the water so as to prevent undue disturbance or waves in the settling tank. The s ate or refuse is delivere l by a chute 19 into a compartment 20 in which a drag conveyor 21 works and acts to convey the slate or refuse to any suitable discharge. The side walls 22 of the tank terminate below the screen and with the U-shapcd converging bottom walls of the ig tank form curved co-extensive in length with the length of the screen and n eeting along a medial line between side walls 22. These curved passages 23. ali'ord uin'estrieted communication between the lower tank and the supply compartments 2s: on each side. To these compartments 21 water supplied from a return circulation or from any source of supply and is normally maintained at a mean level substantially high-er than that in the tank, the difference in elevation being in ac cordance with the intensity desired for the 111113111863. At the bottom of each supply compartment I interpose a valve seat 25 which is suitably supported by angles 26 anchored in the concrete and this seat is semi-circular in transverse vertical cross section and has side flanges 27 which overlap the angle irons 2G. Sen'ii-circular walls 28 close the seat at each end and are disposed to abut the end walls of the con'ipartments. The seat is provided with a series of ports 29 which are preferably elongated in the direction of the length of the and arranged in transverse rows so as to form a multi-ported seat for the semi-circu ar cillatory valve 30, which itself is provided with transverse series of ports 31 lying in the same transverse planes with the series of seat ports 29 and corresponding in size and shape therewith. The valve is provided with spiders 32 which are clamped on. a shaft 2-33 that is journaled in bearings 34. on brackets pro *ided on the end walls 38 of the valve seat. An operating arm 35 is connected to the clamp member 36 which is bolted about the shaft- 33 to flanges on the spider 32, thereby clamping the valve to its supporting shaft 33. The port arrangements of the valve and seat are such that a relatively small angular movement of the arm will oscillate the valve from full open to full closed position and vice versa. The valve mechanism described is utilized in each supply compartment for each jig tank and where a battery of jigs are provided side by side the operating arms 35 of all of the valves are preferably arranged in alignment so that they can all be hingedly connected overhead to a common re ciprocating actuator 37. As shown, this actuator is an I-beam that is supported by the arms 35 and at one end is hingedly connected to a pitman rod 38 which is driven from a crank disk 39 on a shaft 40. The shaft 40 is mounted in suitable bearings 41 and is driven by a chain 42 from a back geared motor 43. By this means the actuator 37 is reciprocated and the several valves 30 are moved in unison to open and close the seat ports and cause impulses of water to flow through the curved inlet passages 23 to the tank below the screen. These impulses will flow up through the spaces between the screen bars in the mannerabove described and will act eliiciently to effect the separation of the lighter from the heavier matter. The lighter will pass over the slate gate 12 and Weir plate 14 and will be discharged along with the overflow Water from the jig through the sluice way 16.

The slate gate control mechanism in the preferred embodiment illustrated, comprises a cam plate 44 carried by the actuator 37 and having its double reverse curved surface engaged by a roller 45, journaled in a rocker 46 that is pivotally mounted at an intermediate point in the bracket 47 and has its other end connected by a rod 48 to one end of an overhead rocker arm 49. This rocker arm 49 is pivoted at its center to a bracket 50 carried by an overhead support 51 and its other end is connected by a rod 52, with a turn buckle 53 provided therein for adjustment purposes, to a clamp 54 which is adjustable along a lever 55 which is fulcrumed to the upper end of the bracket 47 and at its free end carries a curved face 56 struck on an are from its fulcrum. A chain or flexible connection 57 is attached at the upper end of the curved face 56 and at its lower end is suitably connected by divergent chains 58, or the like, to each end of the slate gate 12. The clamp 54, as more clearly seen in Fig. 7, is provided with a set screw 59 by means of which it may be clamped on the lever 55 at the desired distance from its fulcrum. The cam 44 is so disposed upon the actuator that during each cycle of a valve 30, which cycle involves fully opening it and then closing it for a period of rest, the slate gate will be raised and lowered, the relative timing of its movement being dependent on the extent to which it is permitted to overlap the end Wall 8 by dropping into the groove 11 and this overlap is controlled by the adj ustment allowed by the turn buckle 53. For controlling the extent to which the slate gate is raised, the clamp 54 can be adjusted back and forth along the arm 55 and the length of the leverage determines the extent of the openlng.

A sluice way 60 surrounds the inlet tank 17 and takes the overflow therefrom, delivering it down the inclined sluice way walls 61 to an inlet pipe 62 of a pump 63, which, under control of valve 64, delivers the water by means of a pipe 65 to a manifold chamber 66. From this manifold chamber the water flows under control of valves 67 to the water supply chamber 68 of each jig, these chambers for eaclrrespective jig being kept separate by a partition 69 so that either ig may be cut out of service when desired.

With my circulation system therefore the water overflowing from the settling tank 17 returns by the sluice way 60 and pipe 62 to the pump 63 and thence is delivered to the manifold chamber 66 and under valve control delivered to the supply chambers 68 of the several tanks, whence it flows to the supply compartments 24 and hence under control of the valves 30 is delivered through curved passages 23 into the tank below the screen and forced upwardly through the latter and flows to the settling tank with the overflow from the jig.

The embodiment of my invention in a multi-stage jigging mechanism is illustrated in Figs. 11 to 1.3. Here the construction of the tank proper, together with its bin and feed mechanism is the same as described in connection with the single stage jig. The only difference is that here the are not arranged in battery form and hence the pipe 65 from the pump leads directly into the supply chamber 68 of the initial whence it passes to the supply compartments 24 flanking such jig on each side and there is controlled by the oscillatory valve mechanism already described, to form pulsations which enter the ig tank. Also the slate gate mechanism, weir plate and sluice way are all the same, except that the sluice way 16 stops with the far wall 69 of the slate compartment 20, and this wall 69 forms one wall of the supply chamber 68 for the next lower. tank 6. This latter chamber 68 communicates with the supply compartments on each side of such secondary and from these the water under control of the oscillatory valve mechanism described, enters the secondary tank, flows up through the screen 5 therein, and overflows into a sluice way 16, corresponding to that shown in Fig. 4, and thence passes to the settling tank 17 or to a suceeding stage or to the return circuit, as may be desired. The supply pipe 62 for the pump leads from the sluice way 60 into which water overflows from the settling tank. The sluice way 1(3 between stages delivers the water and concentrates passing from the initial jig tank over a screen which extends across the supply chamber 68 for the secondary jig. The screen is formed by bars mounted on cross rods Set with spacer washers separating thenuas will be seen more clearly in Fig. 13. This causes the water overflowing from the initial to pass directly into the supply chamber 68 of the next ig and thence to flow to the supply compartments 24 for such secondary jig which is at a lower level than the initial Inasmuch as it will ordinarily be desirable to subject the material in the initial jig to more violent agitation to separate the heaviest or coarsest matter therefrom, such, for instance. as the slate in coal, leaving the bone coal to be separated from the coal in the secondary jig, it follows that there will be a greater volume of water needed to give the high velocity pulsations in the first than required to give the lower velocity pulsations in the second jig where the materials to he treated, being of much closer relative specific gravity, will require much violent gitation for their separation. To prevent this excess of water from the first jig interfering with the operation of the secondary I provide by-pass sluice gates 71 at the lower end of the latter jigs supply compartments 24 and by raisin or lowering these sluice gates more or less 0 the water can be by-passed over extensions 72 of the sluice way into the settling tank 17 By this arrangement water impulses of long duration and relatively large volume can be delivered to the initial jig and impulses of much shorter duration and lesser volume can be delivered to the secondary so that the mechanism will efficiently remove the heavier matter in the primary treatment jig and the lighter material in the secondary treatment jig. The bone coal, for instance, recovered from the slate compartment of the secondary tank is available for fuel purposes and leaves the concentrate delivered to the settling tank after the two treatments practically free of all matter which it is desired to remove therefrom. The operation of each of the tanks in the multi-stage series is identical with that described for an individual tank.

In the operation of my invention as applied to the single stage jig, the difference in head between the supply compartments 2% and the jigging tank (3 is first established, the differ ence being such as to produce impulses of the desired velocity. The next adjustment is that of determining the desired frequency for the impulses, and this is controlled by the speed of the motor drive to the reciprocating actuator, it being contemplated that the R. P. M. of the crank can be varied in any well known manner.

The next control feature to be determined is the duration of the impulses which is relative to the periods of rest or subsidence for the 1naterial being acted upon in the jig tank, and this duration factor is controlled by the ratio of the width of the valve ports and that of the blank spaces between seat ports, the greater the relative width of the blank spaces the longer the period of subsidence. It is contemplated that seats for the valves having blank spaces of various widths will be provided. Having adjusted these control factors according to tl e work desired in the ig, the mechanism is started up, the material to be treated is fed to the jig, the slate or refuse bed accumulates on the screen and the reciprocations of the actuator impart vertical movements to the slate gate which must be timed relative to the impulses and raised to a hei 'ht which will the best results for the discharge of the refuse or slate. The timing of the movements of the slate gate relative to the impulses is effected by the position of the slate gate cam a: on the actuator. this being set to the desired position. The e): ent of the gates effective opening movement is then adjusted by setting the clamp 59 at the desired distance from the fulcrum of the lever and finally the extent to which the gate rises above the screen bed in the is determined by an adjustment oi its turn buckle 53 which regulates the extent oi its overlap below the screen bed. Having adjusted the slate gate movements in the several ways above described, the mechanism is ready for continuous operation and the concentrates pass over with the overflow water to the settling apparatus and are there treated in the customary manner.

In the operation of the multi-stage jig the two successive jigs operate in the same man ner but generally the secondary operates under a less difference in head between the jig tank and its supply compartments 24, thus causing impulses of lesser intensity in the secondary jig. All overflow water from the primary passes through the screen 70 in its sluice way 16 and flows to the supply com partinents 68 for the secondary jig, and since the latter will have impulses of lesser intensity there would be a surplus of water for the secondary were it not diverted by the bypass sluice gatc: 71 to the settling tank or return circulation. The important feature of this arrangement is that no additional supply of water is required for any stage after the primary stage since each successive stage can be set at a lower level and the water caused to flow continuously from the primary ig' tank through the supply compartments to each jig tank in the subsequent stages.

In Fig. 3 I show a modified type of oscillatory multi-ported valve to deliver the impulses of water to the jig. Here, the supply coniparti'nents 2 L connect directl with the curved passages 23 which have interposed across them a multi-ported seat 25 having ports therein like seat 25. These seats 25 are arcuate with their concave surfaces tacing each other and struck on centers from the aXis of a shait 73 disposed along the apex of the curved walls forming the bottom of the converging passages 23. This shaft 73 projects through an end wall of the tank and is operated by an external rocker arm 74 driven by a connecting rod 75 from the eccentric 76. The shaft 73 carries arcuate multi-ported oscillatory valves 30, similar to the valves 30, and arranged as they move angularly in the same direction to simultaneously open or close the ports in their respective seats 25; The shaft 73 carries an external arm 77 which at its free end is secured to a rod 78 having a turn buckle 79 therein. This rod operates a rocker 80 which by a rod 81 is connected to the cuff 54 on the slate gate lever 55, which is here shown curved in order that adjustments of the cult thereon will not require compensating adjustment of the turn buckle 79. The lever 55 has a tulcrum 82 on a side wall of the tank. This valve and slate gate mechanism will operate like that described above.

I provide any desired number of clean out pipes 83 for each passage 23.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. A jigging mechanism comprising a jig tank, water storage compartments along opposite sides of the tank, valve means interposed at the bottom portion or said compartments, a screen bed in the tank, and U-shaped passages arranged to deliver pulsa tions of water from each compartment, which passages converge upwardly towards and meet along a transverse medial line below the screen between said compartments.

2. A mechanism comprising a tank and screen, a supply tank alongside the jig tank and opening thereinto below the screen, and a multi-ported oscillatory valve controlling the delivery of impulses of water from the supply tank to the tank below the screen, said valve being substantially parallel and co-extensive with the adjacent side of the screen.

3. A jigging mechanism comprising a jig tank and screen, a water supply tank alongside the jig tank having communication with the latter below the screen, an accurate multiported valve seat interposed between the lower part oi the supply compartment and the jig tank, a multi-ported valve mounted to control said seat ports and admit pulsation of water to the jig tank, and means to periodically open said valve.

4. A jigging mechanism of the multi-stage type comprising at each stage a tank having a water supply tank in which the normal water level is maintained substantially above its respective jig tank and in which the water level of: each tank is maintained above the level of the supply tank of the succeeding j i valve means to control the delivery of water impulses from each supply tank into its re spective jig tank, a screen and slate gate mechanism for each jig tank, sluice ways for conducting the overflow water and concentrates between the stages, a settling tank, and means to return the water therefrom to the initial stage.

5. A jigging mechanism according to claim at, in which means is provided to by-pass excess water around secondary jig tanks requiring impulses of lesser velocity than in a preceding 6. A jigging mechanism according to claim 4%, in which means are provided to direct the overflow water from each jig into the supply tank for the succeeding 7. A jigging mechanism according to claim 4, in which a screen is provided in the sluice way leading to a secondary jig tank and is disposed to deliver the water passing through it to the supply tank of the next succeeding 8. A jlgglng mechanism comprlsing a jig tank having a screen therein and a suitable slate gate, water supply passages leading downwardly along opposite sides of the tank and then inwardly under the jig screen and converging upwardly to meet at a point adjacent to the screen substantially midway between the supply ends of the passages, said passages being of substantially uniform cross-sectional area throughout, and synchronously operated valve means to deliver pulsations of water under the desired head from said passages to the jig tank below the screen.

9. In a jigging mechanism, a jig tank having a water supply compartment opening at its lower end, a multi-ported valve in said compartment, means to oscillate said valve, a reciprocatory slate gate for the jig tank, and means to operate the gate by the valve ElCtll-a ating mechanism.

10. In a jigging mechanism, a jig tank having opposed water supply compartments opening at their lower ends into the tank 011 opposite sides, multi-ported valves in said compartments, means to oscillate said valves in synchronism, a reciprocatory slate gate for the jig tank, and means to operate the gate by the valve actuating mechanism.

11. A jigging mechanism comprising a jig tank having a screen and a water supply compartment, an oscillatory valve for controlling the delivery of water impulses from said compartment into the jig tank, a reciprocatory slate gate, a reciprocating actuator connected to said valve to operate it, an element adjustable on said actuator, and means to transmit motion from said element to reciprocate the slate gate.

12. A jigging mechanism according to claim 11, in which said gate operating c011- nections are adjustable as to length, and the slate gate has a seat extending below the jig screen, which seat said slate gate is adapted to overlap to an extent controlled by said I adjustment in its operating connection.

13. A 'igging mechanism according to claim 11, 111 which the operating connections for the gate comprise a lever connected at its free end to the gate and having the connections which rock it about its fulcrum adjustable from and towards the fulcrum to vary the travel of the slate gate.

14. A jigging mechanism according to claim 11, in which the actuator is a cam and 15, the gate operating connections comprise a rocker having a roller engaging said cam, said cam being adjustable on the actuator to time the operation of the slate gate relative to the opening of the valve. 20 15. In a jigging mechanism, a jig screen, means comprising an intermittently opening valve to admit impulses of water to pass upwardly through said screen, a slate gate raising it in synchronism with the opening 25 of said valve, means to reciprocate the slate gate, means to adjust the height to which the slate gate is lifted above the screen, and a weir plate associated with the slate gate.

16. A jigging mechanism in accordance 30 with claim 17, in which the weir gate is fixedly mounted on the jig alongside the reciprocating slate gate and adapted to be ad justed to difi'erent heights above said slate gate.

17. A jigging mechanism comprising a jig tank and screen, a water supply tank alongside the jig tank having communication with the latter below the screen, a multiported valve seat interposed directly between the supply and jig tank and having blank spaces between its ports, a multiported valve mounted to control the seat ports, the width of the blank spaces between the ports of the valve seat bearing a ratio to the width of the 5 valve ports commensurate with the period of subsidence desired in each valve cycle, and means to operate the valve to periodically open and close said seat ports.

In testimony whereof I afiix my signature.

MARTIN J. LIDE.

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