US2523364A - Ore concentrating jig - Google Patents

Description

Sept. 26, 1950 v. o. GLovER 2,523,354

ORE CONCENTRATING JIG Filed April 26, 1948 y 2 sheets-sheet 1 lll I @I ll( IlI In* I: l www H mg A TTORNE Y 7] i j. BY

Sept. 26, 1950 v. o. GLovER 2,523,364

ORE CONCENTRATING JIG Filed April 26, 1948 2 Sheets-Sheetl 2 JNVENTOR. V/co/Q O. (12m/fe.

ATTORNEY- Patented Sept. Z6, 1950 ORE CONCENTRATING J IG Victor OJGlover, Denver, Colo., assigner of onehalf to `Charles N. Cox, Denver, Colo.

Application April 26, 1948, Serial No. 23,342

' 3 Claims. l

This invention relates to an ore concentrating jig, and has for its principal object the provision of a compact, portable, highly efcient jig construction which can be made easily portable, and which will obtain a maximum recoveryof values from the ore or sand.

Another object of the invention is to so construct the device that all operating parts will be easily accessible and to provide a jig which will have a rapid pumping or surging action with a minimum of bed disturbance so as to obtain the highest possible recovery.

A still further object is to so construct the device that it will require a minimumof power for operation.

Other objects and advantages reside, in the detail construction of the invention, which is def signed for simplicity, economy, and elciency. These will become more apparentfrom the following description.

In the following detailed description of the invention, reference is had to the accompanying drawing which forms a part hereof. Like Vnumerals refer to like parts in all views ofthe drawing and throughout the description.

In the drawings:

Fig. 1 is a side view of the improved ore jig; v

Fig. 2 is a right end View thereof;

Fig. 3 is a left end view;

Fig. 4 is a longitudinal section, taken on th line 4 4, Fig. 5;

Fig. 5 is a vertical cross-section, taken on the line 5 5, Fig. 4;

Fig. 6 is an enlarged detail View of an operating cam' employed on the improved jig; and

Fig. 7 is a detailed view o f ap valve employed on the improved ore concentrating jig.

While more particularly designed for the recovery of mineral values it will be found useful on any materials where a hydraulic separation and classication may be made.

The improved jig comprises a hutch IU having elongatedrectangular upper .portion with vertical end boards I I and vertical side boards I2. The hutch may be constructed of either metal or wood, the latter being illustrated. Two bottom boards I3 incline downwardly from the endy boards I I at an angle of approximately 45 to form a V-shaped bottom' in the hutch.

The two side boards extend downwardly below the bottom boards I3 and forwardly and rearwardly thereof to form supporting arms I4. The arms I4 and the end boards II are secured, by means of suitable screws 56, to and supported by four vertical supporting leg irons I5. The leg irons I5 are secured at the bottom to cross pieces I6 which, in the embodiment illustrated, are mounted on runners I1.

A tray is supported over the hutch IIJ. The tray comprises two elongated side plates I8 riveted or otherwise secured to two parallel, longitudinally extending angle beams I9. The side plates extend below the beams I9 and into the hutch III and the beams I9 rest ulpon one of the end boards I I which will be designated the discharge end. At the latter end the top of the end board inclines outward and downward and is covered by means of a clamp plate 28. The portions of the side plates I 8 at the discharge end are joined by an angle plate 22 which forms one end in the tray. The other end is closed by means of an overflow lip plate 55 which determines the solution level in the tray and guides the overflow of the solution therefrom. A similar angle plate 23 is secured between the side plates I8 at the opposite end of the tray. The angle plates are supported on cross pieces 2| secured beneath and extending between the beams I9. An upper end .plate 24 completely closes the end of the tray above the plate 23. The bottom of the tray is closed by means of a relatively coarse wire screen 25. In place of the screen, cross bars may be employed.

A rubber sealing gasket 25 surrounds the entire top of the hutch and secured thereto by means of clamp strips 30 and screws 3l. The gasket is clamped to the lower legs of the two angle beams I9 by means of clamp straps 21 and clamp bolts 28. The gasket is also secured between the angle plates 22 and 23 and the crossl pieces 2I by means of bolts 29 so as to form a hermetic seal entirely around the bottom portion of the tray. Thus, the only opening at the top of the hutch IIJ is through the screen 25.

The angle beams I 9 extend over and rest on the discharge end board Il to support a counter-weight box 32, which may be filled with water or sand 33 to produce the desired counterweight effect. The box 32 serves as a spacer and brace for the beams I9. The other extremities of the two angle beams I9 extend beyond the opposite end board II and terminate in a cross piece 34, from which an inverted U-shaped roller leg 35 extends rigidly downward to support a rotatable roller 36. The roller leg is secured to the cross piece 34 by means of a bolt 52 which passes through washer-like shims 53 which can be removed or replaced.

The roller 36 rides upon an involute cam 3l which is xedly mounted on a cam shaft 38.

3 The cam shaft 38 is carried in bearing blocks 39 mounted on the legs I at the end of the lig. The shaft 38 may be driven in any desired manner such as by means of a pulley 43.

Water is supplied to the hutch from a water pipe 40 controlled by means of a valve 4I. The pipe 4I] enters the hutch immediately below the gasket and tray. The hutch when in use is completely filled with water.

A discharge opening 42 is formed at the lowermost point of the hutch I0. The opening is closed by means of a flap valve whichv is mounted on the extremity of an elongated leaf spring 45. The spring 45 is i'ixedly secured to one of the bottom boards I3 by means of suitable screwsll so as to constantly urge the apagainst a nipple projecting around the discharge opening 42. A control rod 41, terminating in a hand crank 48, is supported from the counter-weight box 32 by means of a bracket arm 49. The control rod 4l is threaded through a nut 50 positioned `on the far side of an ear 5I secured tothe spring.A The flap. valve Ymay have any. desired construction. Asillustrated, the lower extremity of the spring is bifurcated to form a fork 54 as shown in Fig. 7 to straddle the vnipple of the discharge opening 42. Y Over this fork 54, a short piece of flexible rubber tubing 44 'is stretched. Two s mall lugs on each side of fork holds the tubing in place. The tension of the flatA spring 45 keeps the rubber tubing against the nipple about the discharge port; and the rubber conforms to any irregular surfaces such as pieces of concentrates between the rubber gasket and the' port.

The upward and downward, inward and outward movement of the counter-balance causes the flap valve to open and close automatically with each stroke of the tray. The amount of opening is determined by the position of the nut The weight of the hand crank 48 holds the adjustment wherel set without any locking device. The controland discharge gate is in full view of the operator. t will be noted that the amount of discharge through the dischargek opening 42 is automatically controlled in direct proportion to the use of the jig, for at each downward `stroke of the tray I8 the valve will .be pulled open, by the rod 4l, and at each upward stroke the valve will be closed by the spring 45.

Since the gasket seals the entire of the hutch It around the tray, Iall the air and/or water is forced thru-ugh the bedding in the tray by the successive slow upward movement and the quick downward movement by gravity, without jaror vibrationwhich would disturb the bedding.

The tray has a tilt of about two degrees toward the discharge end on the ,highstroka yThis tilt,

, together with the positive'water surge, greatly increases capacity. Y The tilting ofthe tray allows the stroke to be from almost Zero to above one inch without any adjustment, a very definite improvement in jigging. The longer stroke at thefeed end takes care of the larger and heavier particles, the small o r nes Ynear the discharge end, andthe intermediate particles in between these points of the long and short stroke of the tray.

The pressure surge of the water in the hutch is the same at all points in the tray which keeps the bedding in a fluid state which is necessary for the proper concentration of materials, either metallic or non-metallicf Any over load of materials in the tray increases the weight which in turn increases the gravity drop automatically,

and hastens the discharge. It will be noted thatY the tray is its own plunger or surge unit. This feature makes avery positive water surge` and saves floor space.

The gasket seal between the tray and the hutch Y eliminates any splash or spillage that would occur without this arrangement. Thus the water requirements are very low. Y

The counter-weight box is lled' with water, sand or any suitable material at hand, to nearly balance the tray which is over the hutch. The weight of the bedding in the tray holds the beams I9 down at the fulcrum point on the hutch, so no hinges or other devices are needed. The counter-balance also reduces the power requirement and lowers the starting torque. The cushioning effect of the water together with the counter-balance and the motion previously described, are the factors in eliminating jar or vibration. This feature is important as any jars or vibrations disturb the tray beddings.

It is desired to c all particular attention to the contour of the cam 31. The high point Vof the cam is flattened out so as to give the required drop to a stiff or rigid arm. From the high point to the low point is in the form of an arc, the radius of which is the same as the radius of the ball-bearing roller on the arm at the lower end. This roller rolls downward into and along the arc, quickly forcing the water up through the bedding in the tray with asharp surge, which straties the `materials being processed. Thus the heavier particles work ldownward by stages through the bedding into the hutch. V'The purpose of the arc is to get a quick drop without a jar or vibration which is ,not desired, as this disturbs the bedding materials in the tray. The hydraulic action of the water surge is the desired and required action.

The complete cycle of the motion is, beginning at the lowv point, a gradual rise from near its axisrto the high pointY 'from where the' roller rolls into the downward arc as stated above. The quick drop is for the water surge and the relative slow upward movement to allowfor the relacement of water in lthe hutch. The replacement water and the slow upward thrust of the arm relieves the possibility of a suction pull on the bedding in the tray which would` suckthe light waste materials down through thebedding and into the hutch. The quick drop keeps the bedding in a fluid state; otherwise, the concentration would be incomplete. q

Several jigs may be placed side by side as a battery, to be driven by their own shafting, Arequiring only standard couplings. Line shafts, extrabelts, pulleys, or individual drives are unnecessary in this arrangement. Jigs can also be used in tandem with beltY drive from one to the other, or by using a small gauntry frame with a walking arm set a little olf center, the jigs being connected to this arm by toggle links. This hook-up is for selective concentration, In a -battery of jigs, the couplings would be set at different degrees of a circle to distribute evenly the load on the power unit. Starting torque is very loW-counterbalanced. Ends of shaftings can be used as power take-off for any of the several feeders; also for a balance wheel. 'I'here are only two greasing points-the two shaft boxings.

The leg 35 which is an integral part of the tray construction, is stiff or rigid, having no slides, guides, crossheads, loose pins, or any other friction moving parts. Adjustment is provided for at the discharge end by shims to keep the bedding at the proper level.

While a specic form of the improvement has been described and illustrated herein, it is desired to be understood that the same may be varied, within the scope of the appended claims, without departing from the spirit of the invention.

Having thus described the invention, what is claimed and desired secured by Letters Patent 1. An ore concentrating jig comprising: a supporting frame; a hutch supported by said frame, said hutch having an elongated, rectangular upper portion; a V-shaped bottom in said hutch inclined downwardly from the two ends thereof; two parallel angle bars extending longitudinally over said hutch in parallel spaced relation and projecting beyond both ends thereof, said angle bars resting on one end of said hutch; a tray supported between said angle bars over said hutch; a screen forming the bottom of said tray; a counter-weight carried by said angle bars beyond one extremity of said hutch to partially counter-balance the weight of said tray; a cam follower carried by the other projecting extremities of said angle bars beyond the other end of said hutch; a rotating cam mounted on said frame and contacting said cam follower to vibrate said tray; a discharge port in the bottom f said hutch; a iiap valve on the exterior of said inclined bottom closing said port; spring means urging said ap valve against said port to seal the latter; and means for withdrawing said flap valve from said port at each downstroke of said tray.

2. An ore concentrating jig comprising: a supporting frame; a hutch supported by said frame, said hutch having an elongated, rectangular upper portion; a, V-shaped bottom in said hutch inclined downwardly from the two ends thereof; means for discharging material at the low point of said bottom; two parallel angle bars extending longitudinally over said hutch in parallel spaced relation and projecting beyond both ends thereof, said angle bars resting on 'one end of said hutch; a tray supported between said angle bars over said hutch; a screen forming the bottom of said tray; a counterweight carried by said angle bars beyond one extremity of said hutch to partially counterbalance the weight of said tray; a cam follower carried by the other projecting extremities of said angle bars beyond the other end of lsaid hutch; a rotating cam mounted on said frame and contacting said cam follower to vibrate said tray; a discharge port in said bottom; an elongated iiat leaf spring secured at its one extremity to said bottom and extending to said port; a flap valve mounted on said spring and covering said port; a bracket arm extending from said counterweight; and a connecting rod extending from said arm to said spring to withdraw said iiap valve at each upstroke of said counter-weight.

3. An ore-concentrating jig comprising: a rectangular hutch of greater length than width; a pair of spaced-apart, horizontal supporting beams extending longitudinally of said hutch in parallel relation to the sides thereof and resting upon the ends thereof, said beams extending beyond both ends of said hutch; a screen tray supported between said beams within said hutch; a substantially horizontal, exible sealing gasket secured to and surrounding said tray and extending outward to the sides of said hutch; means securing the periphery of said gasket about the top of said hutch to seal the space between the walls of said hutch and said tray; means for vertically reciprocating one extremity of said beams; a bracket arm rigidly supported from said beams at their other extremities beyond one end of said hutch; a discharge opening in said hutch; a flap valve; spring means urging said flap valve to seat against said opening to normally close the latter; and a control rod connected to said nap valve at its one extremity and to said bracket arm atl its other extremity so that as the first extremities of said beams are lowered, said ap valve will be pulled from its seat to open said discharge opening. VICTOR O. GLOVER.

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

UNITED STATES PATENTS Number Name Date 159,347 Nevin Feb. 2, 1875 213,313 Baker Mar. 18, 1879 216,813 Whitaker June 24, 1879 382,576 White May 8, 1888 540,659 Hancock June 11, 1895 637,247 Gutenkunst Nov. 2l, 1899 678,932 Birch July 23, 1901 783,250 Duncan Feb. 2l, 1905v

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