US1160502A - Ore-jig. - Google Patents

Description

F. FRANZ & E. R. DAY.

ORE JIG.

APPUCATION men MAY 8. 1914.

1 ,16Q,502, Patented Nov. 16, 1915.

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' Specification of Letters Patent.

Patented Nov. 16, 1915.

Application filed May 8, 1914. Serial No. 837,169.

. To all whom it mai concern:

Be it known that we, FRANK FRANZ and EUGENE R. DAY, residing at Wallace, in the county of Shoshone and State of Idaho, have invented a new and Improved Ore-Jig, of which the following is a specification.

Our invention relates to that class of ore classifying or dressing jigs in which 1s included a vibratory screen, and in which movement is imparted to the screen in such a manner that the ores are separated from the lighter material or gangue, the diflerent grades classified, and the concentrates, middlings and tailings drawn off through plugged outlets,

Our invention primarily has for its object to provide an ore jig of the general character referred to of a simple, compact and economical construction, in which the cooperating parts are especially so designed and arranged that'the machine can be run much faster than has heretofore been possible in the type of jigs before mentioned, in which the operation of the machine is practically noiseless, and the screen shaking or jigging operation effected with less power than has heretofore been required in machines of like type.

With these and other objects in view, that will hereinafter appear, our invention comprises an improved ore jig, that embodies the peculiar and novel" construction and combination of the parts hereinafter fully explained, specifically pointed out in the appended clainis and illustrated in the accompanying drawings, in which Figure 1 is a perspective view of our improved ore jig. Fig. 2 is a longitudinal section thereof, the screen tray being shown as having been moved under slow motion, to the limit of its forward or head motion thrust. Fig. 3 is a similar view of our improved jig, the screen tray being shown at the limit of its quick or spring thrust position. Fig. 4 is a top view of the head motion end of our machine, the parts being in the position shown in Fig. 3. Fig. 5 is a cross section thereof, on the line 55 on Fig. 4. Fig. 6 is a longitudinal section of a portion of the screen'frame and one of the discharging cups mounted thereon. Fig. 7 is a section on the line 7-7 on Fig. 6. Fig. 8 is a plan view of the machine as shown in Fig. 2. Fig. 9 is a section on the line 9-9 on Fig. 8. Fig. 10 is a detail section of one of the plug devices for the outlets in the bottom of the hutch. Fig. 11 is a section on the line 1111 on FigflO.

In the practical application of our inventhe top of thcbox 1, and are made fast to the two cross shafts or hangers 3, by clips and bolts 2l21, as shown.

Upon the outer ends of each of the cross shafts 3 is connected a rocker arm or lever 5, and the said arms'5, pendent from the shafts 3, are normally held inclined toward the tailings end of the machine at which position they are held in the manner presently explained.

The jig or screen 6 in our construction is composed of sections, whose screening surfaces are of progressively different mesh, four of such sections being shown. The screen plates are held down by the cross cleats 7 and the shallow riflie ribs or plates 70, the cleats 7 forming the separating members that divide the screen into the sections, as before stated.

8 designate cross slats secured on the un-.

der side of the screen tray frame, one of which is provided for each of the cleats 7, and the riflle member 70. As is clearly shown in Figs. 2 and 3, the cross cleats 8 are set diagonally with respect to the screen and inclined forwardly in the direction of the feed end of the screen and the said in cline of the cleats 8 is in parallelism with the line of motion of the screen, as will be hereinafter more fully explained.

' The hutch or box 1 is divided into coinpartments by the vertical portions 80, one of such compartments being provided for each of the screen sections, and each of the said compartments, has also a supplemental compartment 81, into which the tailings are delivered, and which has a plugged outlet con:

trolled by a valve or gate presently described.

In ore jig mechanisms of the general character stated, it is usual to effect the jigging or screen shaking action through cam actuated lever connections. From practical ex perience we have found that cam operated means, such as are generally used for jigging the screen tray do not meet all of the desired requirements.

In our jig mechanism, the screen tray actuating devices'are such that the tray can be rapidly operated for a quick down and slow upward movement, the said operations being effected in a practically noiseless manner, and the jigging operation so accomplished that the separation .and classification of the ore is more positively and quickly effected than has been possible with the ordinary types of cam actuated screen trays.

. In our construction, we employ a head motion mechanism that is so arranged and so connected with the screening tray that it pushes the tray in one direction, toward the tail end of the machine, to cause the tailings to move toward that end, and at the same time store up such energy, which, when released, as hereinafter explained, moves'the screening tray in the other direction under a 30 quick and powerful action. The said motion,

which is best shown in Figs. 4 and 5, consists of a horizontal plunger bar 10, mounted in bearings 11-11 and held to move in the longitudinal direction of the machine. 5 The outer end of the bar terminates in a head 12 having a socket bearing 13 that receives the ball end of a rocker arm 15 whose outer end has a socket bearing 18 for receiving one end of a toggle link 19, the other end of which rockably engages a bearing 20 in a bearing plate 21, that is vertically adjustable on a block bearing 22, and which includes an angled member 23 that projects over the block 22, and has a threaded aperture 24, for receiving an adjusting screw 25,

presently again referred to.

Rocker arm 15 before mentioned, forms an extension of a rocker bearing 26 with which engages an eccentric 27 mounted upon a cross shaft 28 journaled in the side, bearings 2929 and which carries fast and loose belt. pulleys 30-31.

32 designates the driving belt that takesaround either of the said pulleys 30-31,

By reason of the peculiar construction of the parts that constitute the head motion, the eccentric cam, which rotates in the direction of arrow 00, causes the rocker arm 15 to swing down and thereby push the bar 10 60 slowly forwardly toward the tailings end of the machine, and since the said bar is connected by a spring bar 39 to the adjacent cross shaft 3 that is fixedly connected to the brackets'20 connected to the sieve tray, the

66 tailings end of which is likewise connected to the other cross shaft, the sieve tray is moved slowly toward the said tailings end thus simultaneously imparting a slow up motion to the screen in a diagonal direction. At this point, it should be stated, that the length of the said slow-up, on the diagonal stroke is determined by the adjustment of the hand screw that controls the pitch of the toggle lever arm 19, which regulates the length of time of contact of the eccentric cam with the" bearing member of which the rocker arm 15 forms a part, it being understood that as soon as the cam has moved the limit of its operating stroke, the said bearing is then adapted for being rocked in a reverse direction upon the shaft upon which it is mounted, to thereby allow for a return motion of the bar 10. This return motion in our construction of jig is quickly effected and under such condition as to impart a powerful and effective jigging action on the sieve tray, which operation is best explained as follows:

31 designates a stout coiled spring that seats upon a cross bar 32 mounted upon the 1 upper edges of the sides of the sieve tray, and which takes around a central rod 33 that projects up from the cross bar 32, and passes'freely through an aperture in another cross bar 34 that is fixedly held on the side rods 35 secured to the opposite top edges of the box 1.

When the tray sieve is moved back, under the head motion force, before referred to, the tension of the spring 31 is stored up until the eccentric cam of the head motion has effected the limit of the thrust motion and reaches a pointwhere the bar 10 is forced tobe moved back, and when such conditions exist,the stored up tension of the spring 31* quickly thrusts the sieve tray downwardly,

and since the tray hangs on the rocker arms, that are now at the limit of their back- -wardly inclined position, causes the sieve heavy ore passing first and followed in their turn by the lighter ore and middlings, while the 'tailings pass over the end.

When necessary, for the specific ore, or ores under treatment, steel balls may be car-. ried by the screens to keep the tailings from slipping through, the latter and the middlings sinking to the bottom of the box l from whence they are drawn through the plugged openings presently again referred to.

The fiat spring steel bar member 39 that connects the tray with the head motion, is longitudinally adjustable, the same being connected with the bar 10 by the screw end of the rod passing through a bracket 35* on the'bar 10, and the set nuts 3636 that engage the said rod.

The connection between the head motion and the jig or tray is a substantially rigid one, since the flat spring member 39 yields only enough to let the tray rock up or down.

The several openings in the bottom of the box for discharging the middlings and the tailings, as also the other ore separations, are each controlled bya plug 37, each operated by a handle rod that extends up through the top of the machine.

Each plug 37 has a V or U shaped taper slot 39, the large end of which is at the bottom, and is so arranged that as it is pulled up the size of the discharging outlet is increased and when forced down the size of the outlet is correspondingly decreased until the slot in the plug passes below the said outlet which entirely closes the outlet.

In working some grades of ore, it is desirable to use one or more discharging cups in connection with the screens. In the drawing is shown one of the cups, designated 40, set in the center of one of the transverse or division cleats 7. The purpose of the said cups is to trap the ore under and let it go through an opening 41 in the screen by raising or lowering a valve or gate 42. When a trap cup is used, such of the ore as is not trapped passes over the cleats 7 on both sides of the cup. The cross or screen cleats 7 also serve to keep the steel ball bed from moving toward the tail end of the jig. It is understood that the box or hutch is supplied with Water through a feed pipe 45 to a sufficient depth to cover the screen and the ores thereon.

46 designates an overflow for the hutch.

46 designates a feed chute that delivers the material onto the feed end of the screen.

From the foregoing description taken in 7 connection with the drawings,

the complete construction, the manner in which ourr ore jig operates and the advantages thereof will be readily apparent to those skilled in the art to which our invention relates.

By reason of the manner in which the jig, a. e., the screen tray is hung and the means combined therewith for operating the same, our motion is in the nature of a differential reciprocating motion, at an angle of thirty degrees to forty-five degrees, and it is a positive, quick-down and slow-up motion, the advantages of which will be understood when it is noted that the quick-down motion forces the water up through the ore,

giving the heavier particles a chance to settle down and pass through the screens while the slow motion on the diagonal causes the lighter material to move toward the tail end of the machine.

VVhat we claim is: a

1. The combination with a hutch having aseries of independent transverse compartments, a screen hung over the said compartments, the said screen being formed in sections of progressively different mesh, one of the said sections being provided for each of the said compartments, the said screen including slats on their under face that incline diagonally toward the receiving end of the screen, vibratory hanger devices from which the screen is suspended, and means for imparting reciprocating motion to the screen in a plane parallel with the diagonal angle of the screen slats.

2. The combination with a hutch having a seriesof independent transverse compartments, a screen hung over the said compartments, the said screen being formed in sections of progressively different mesh, one of the said screen sections being provided for each of the said compartments, the said screens including slats on their under face that incline diagonally toward the receiving end of the screen, vibratory hanger devices from which the screen is suspended, and means for imparting rapid downward and slow upward reciprocating motion to the screen in a plane parallel with the diagonal angle of the screen slats.

3. The combination with the hutch having a series of independent transverse compartments, a screen hung over the said compartments, said screen being formed in sections of progressively different mesh, one of the said sections being provided for each of the said. compartments, said screens including slats on their under face that incline downwardly toward the receiving end of the screen, hanger devices upon which the screen is suspended, and means for imparting reciprocating motion to the screen in a plane parallel with the diagonal angle of the screen slats in one direction, and other means for imparting motion to the screen in a reverse diagonal direction.

4. The combination with a hutch, a screen mounted in the upper end of the said hutch, opposing and vertical-1y extended bearing brackets at each end of the screen, a hanger shaft mounted on each pair of the said brackets,

crank levers secured to the said shafts and having rocker bearings for engaging the sides of the hutch, a head motion alinement with the first named cross bar attached to the hutch, a coil spring interposed between the cross bars and joined therewith to swing in a diagonal movement with the screen and which serves as a tension thrust" -for rapidly moving the screen downwardly when the screen is released from the head motion.

The combination with a hutch and a screen including cross slats on the under face that incline diagonally toward the receiving end of the screen, the said screen having an oppositely disposed set of bearing brackets at each end, a hanger shaft mounted on each set of the said bearings, a pair of supporting levers for each hanger shaft, said levers being fulcrumed at the lower ends upon the opposite top sides, of the hutch and normally held inclined toward the tailings end of the screen,-means for imparting reciprocatin motion including evices' for moving the screen slowly in a diagonally upward direction, and other devices for moving the screen quickly diagonally downward in the other direction, and means for absorbing the thrust motion of the screen when moved diagonally downward as aforesaid.

FRANK FRANZ. EUGENE R. DAY.

Witnesses:

P. QUARDELL, E. R. KENNEY.

to the said screen and r

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