US769431A - Ore-concentrator. - Google Patents

Description

No. 769,431. PATENTED SEPT. 6, 1904. I. A. GAMMBTT & F. E. SHEPARD. ORE OONCBNTRATOR.

APPLICATION FILED MAILZQ, 1898. N0 MODEL. 5 SHEETS-SHEET 1.

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A TTORNE Y No. 769,431. PATENTED SEPT. a, 1904. I. A. GAMMETT & F. E. SHEPARD.

ORE GONGENTRATOR.

APPLICATION FILED MAR. 29, 1898.

5 SHEETS-SHEET 2.

H0 MODEL.

/ N VE N T095 9 14. Q ("M M ATTOF/VEY No. 769,431. PATENTED SEPT. 6, 1904. I. A. GAMMETT & P. E. SHEPARD.

ORE OONGENTRATOR.

APPLIOATION FILED MAR. 29, 1898.

5 SHEETS-SHEET 3.

NO MODEL,

lNVE/VTO/ZY Mal- TTOHNE) W TNESSES No. 769,431. PATENTED SEPT. 6, 1904. I. A. GAMMETT & F. E. SHEPARD.

ORE CONGENTRATOR.

APPLICATION FILED MAR. 29, 1998.

5 SHEETS-SHEET 4- N0 MODEL,

A TTOHNE) Patented September 6, 1904;

UNITED STATES PATENT tricE.

IRA A. OAMMETI. AND FRANK E. SHEPARD, OF DENVER, COLORADO, ASSIUNOR TO ARTHUR R. \YlLFLEY, OF DENY ER, COLORADO.

ORE-CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 769,431, dated. September 6, 1904.

Applieatioirfiled March 29, 1898.

Be it known that we, IRA A. OAMMETT and FnAXk E. SmsramnofDenvergColorado, have invented certain new and useful Improvements Relating to Ore-Concentrators, of which the following is a description, referring to the accompanyingdrawings, which form a part of this specification.

The object of the invention is to improve the construction and perfect the operation of ore-concentrators.

The nature of the invention is such that it will be best understood by an inspection of the accompanying drawings, which show one embodiment of it. though it must not be understood that it is limited to the minor details of construction there shown.

Figure 1 is a plan view of the table and some of its attachments. Fig. 2 is a side elevation of the concentrator, Fig. 3 is an end view of the table and some of its attachments, the frame being shown partly in cross-section. Fig. 1 is a sectional detail on the plane a r of Figs. 1 and Fig. 5 is a cross-section at right angles to Fig. 1. Fig. 6 is a crosssection showing a portion of the table transversely inclined. Fig. 7 is a cross-section of a water-supply pipe. Fig. 8 is a central axial section of the conveying apparatus or pump used for the middlings. Fig. 9 is a central section transverse to the axis, showing the rotating portion of the same. Fig. 10 is a plan view, and Fig. 11 is a side elevation, of the end-shake mechanism. Fig. 12 is an end elevation, partly in cross-section, on the plane X X of Fig. 11; and Fig. 13 is a vertical section on the plane 13 13, Figs. .10 and 11.

'lhroughout the drawings like numerals of reference indicate like parts.

The table of the concentrator is mounted to reciprocate longitudinally under the action of the end-shake motion, which will be later described. Preferably ball-bearings 20 are provided to permit the endwise movement of the table upon its frame 21. The frame 21 is hinged or mounted so as to tilt upon a longitudinal axis 22 and is adjustable thereon by means of any one of the three handwheels 23, which are cooperatively connected Serial No. 675,637. (No model.)

by means of the sprocket-wheels 21,.so that they may all three be simultaneously actuated. The lower frame or bed-frame 30, upon which the frame 21 is adjustable, as just described, is supported upon hinges orfulcrums 31, which form a transverse axis, upon which the apparatus may be inclined by means of the hand-wheel 32. By these means the table may be inclined transversely and longitudinally to the desired degree, and by a combination of both adjustments the table may be inclined obliquely, so as to raise one of its corners. The table itself is constructed of fluted wookwork, the flutings and the grains of the wood lying at right angles to each other in the two layers. (Clearly seen in Figs. 4, 5, and 6.) By this construction the table may be made very light and at the same time will retain its shape. The riftles a0 are in the form of strips set on edge upon the transverse members 41 of the table. Between these riffles &0 are set the longitudinally-grooved upper members of the table *2, which form the surface or bed of the table and separate the riifies. The left-hand end of the table, as seen in Fig. 1, will be referred to as the head end and the other as the tail end for distinction. The riiiics run from the head end toward the tail end, gradually diminishing in height until they converge into or sink below the surface formed by the members +t2, which separate the riiiles from each other. The rii'iles at the feed side of the table are comparatively short and are successively of greater length as the gangue side or tailings side of the table is approached. This results in producing a triangular area toward the tail end and feed side of the table, in which the riflies do not project above the surface of the table, as clearly seen in Fig. 1. The surface of this portion 44% of the table is given a roughened finish similar to a piece of coarse sandpaper or grooved from the end of the ritiles toward the end of the table. This result is preferably accomplished by coating it with a paint not susceptible to the action of water and either roughening the surface of the paint or introducing sand or other small particles into the paint before it is applied. The grooves are made by planing the riflie-strip below the levelof the table. While the strips 40, which form the riffles, also form part of the flat portion 44 of the table, the separating-lines do not appear in the space 44. These lines are omitted for the purpose of distinguishing between the part of the table where the riffies are raised and the part in which they sink into or below the common level of the separating members 42. It must be understood that all the riffles taper down from the head end to the-boundary of the space 44, the shorter riffies tapering more rapidly than those that are on the tailings side of the table, but all assuming the common level of the surface 44 or below same along the oblique line which bounds it. WVere the riflies simply tapered down from the head end to where they disappear at this oblique line and nailed upon a flat surface they would tend to curl up at the thin ends under the action of water; but by being inserted on edge between the separating members 42 and resting upon the transverse timbers 4.1 the whole table is made firm and secure and the bending or curling of the rifiies prevented.

The pulp or material to be treated is fed into the feed-box 50, placed above the rifiiesurface at the feed side of the table near the head end. The end-shake movement, which is given to the table and which will be presently described, carries the material along the rifflesurface toward the tail end of the table and onto the roughened or grooved surface 44, where it is acted upon by clean water delivered from the water-supply pipe 51. The gangue or tailings wash across the successive riffles from the vicinity of the feed-box 50 and finally pass at the tailings side of the table into the tailingsbox 57. The concentrates or valuable mineral portions of the pulp are carried along between the riffies toward the tail end of the table until they reach the surface 44, and after being almost entirely freed from gangue and foreign materials by the wash-water upon the surface 44 they pass into the concentrates-box 52. As the pulp or wet material starts from the corner of the table beneath the feed-box 50 the water which it contains spreads out over the surface of the table as it flows toward the tailings side. As the result of this, particles of metal or valuable mineral which are washed over the first one or two rifiies will be caught by the succeeding riffles and eventually carried toward the tail end of the table and onto the roughened or grooved surface 44 to be acted upon by the wash-water from the pipe 51.

The middlings, which is that portion of the material which should be delivered near the corner of the table diagonally opposite to the feed-box, are re-treated for the recovery of any valuable mineral which may remain in them. For the purpose of dividing the tailings into middlings and tailings which are not to be re-treated the movable partition 53, sep arating the middlings-conveyer 54 from the tailings-box 57, is provided. By moving this toward or from the tail end of the table more or less of the tailings will pass as middlings into the inclined conveyer 54 and wash down toward the centripetal conveyer 60, (which will be presently described,) and thereby clelivered through the pipe 7 O to the middlings feed-box 71. This middlings feed-box delivers the middlings back onto the table at the feed side, but at a point considerably nearer the tail end than the feed-box 50. By adjusting the point at which the middlings feed-box 71 delivers the middlings back onto the table almost perfect separation of the middlings can be obtained. To permit this adjustment of the box 71, it may be mounted on adjustable sup.- ports 7 2, which may travel along the rail or stationary support 7 3, secured on the side ofthe bed-frame 30. The wash-water is delivered from the pipe 51 along the feed side of the surface 44. The tail end of the pipe 51 is supported by a hand-screw 75 and bracket 76. By turning the hand-screw 75 the end of the pipe may be raised or lowered to aifect the flow of water from it. The pipe 51 is slotted or perforated at intervals, preferably for its whole length, as indicated at 78 in Fig. 7, preferably on the upper side of the pipe. Beneath is provided the drip-flange 77. The water flowing through the opening 78 runs around the pipe 51 and is spread by the drip-flange -7 7 into a continuous sheet as it flows onto the table. By turning the screw 75 the relative quantity of water delivered at the respective ends of the pipe 51 may be regulated at will.

The centripetal ,pump or conveyer may be driven by a belt-wheel 61 and shaft 62, upon which is mounted the rotary parts of the conveyer. The rotary part consists of two side plates 63, with the two spiral coils 64, forming spiral channels between them, extending from the exterior to the central space 65. The central space is provided with a projecting flange, as shown, which fits within the stationary hub 66 of the casing. To the hub 66 is connected the middlings tail-pipe already described. The plate 63 and spirals 64 are partly submerged in the middlings conveyer-box 54, so that the rotation of the spirals causes it to gather up a portion of the pulp and water, depending in amount upon the depth to which the spirals are submerged. The spirals are turned in the direction shown by the outermost arrow in Fig. 9, and as the result the pulp and water taken up at each rotation, combined with the air which is taken in between the successive quantities of water and pulp, are forced by gravity in the direction indicated by the arrow, reaching the central space 65 and flowing out through the pipe 70 into the middlings feed-box 71.

By inspection of Fig. 9 it will be seen that there are two spirals, forming two spiral passages, so that two quantities of pulp or water are taken up at each rotation of the apparatus. This tends to balance the action of the pump and increase its capacity for a given diameter and speed, while decreasing the number of pulsations for a given speed. If any leakage takes place between the hub 66 and the rotating part of the pump or conveyor, it will merely tlow back into the casing and be taken up again by the spirals. By this simple arrangement complications of a stufiingthe length or throw of the movement is conbox are avoided. This centripetal conveyer or pump will lift pulp, sand. &c., without choking, and it requires a verysmall amount i for instance, as the cone-pulleys 100. Flg. 10.

of power in its operation.

The endshake apparatus remains to be described. its principal parts are the crankshaft 80. pitman 81, oscillating frame 82, connecting-link 83, and reciprocating rod 81,

mounted in the framework or housing The oscillating frame 82 turns upon the trunnions 90 in suitable bearings in the housing It is oscillated upon these trunnions by means of the pitman 81, which is pivoted at one end to the box 91, adjustable along the screw 92 by the hand-wheel 93. The object of this adjustment is to produce any desired difference in the relative speeds of the direct and return movements of the reciprocating rod 81. so as to give an end-shake movement to the table that will tend to cause a progressive travel of the particles along the surface of the table in distinction to a mere evenly-balanced or harmonic movement, which would merely agitate without giving progressive movement to the particlesthat is to say, when the box 91 is adjusted so as to be beneath the shaft the direct and return movements of the table are of substantially similar character; but when the box 91 is screwed toward the hand-wheel 93 and displaced from directly beneath the shaft 80, then a quickening of the return movement and a delaying of the direct movement is produced. Incidentally the adjustment of the box 91 by means of the hand-wheel 93 causes a variation in the length of the stroke, as well as a difference in its quality; but this is not the object of the adjustment, and the length of stroke is changed to any desired extent by independent means operated by the handwheel 93:5. These means are as follows: The reciprocating rod is spring-pressed toward the link 83 and is, indeed, kept in contact with the link solely by the compression of the spring. The link 83 is a loose link having recesses at each end, one of which recesses receives the trunnion or bearing 96 of the rod 8%, while the other end of the link, forked as shown in Fig. 10, bears against trunnions UT, carried by a vertically-adjustable box 98, which is screw-threaded on the screw 99. By turning the hand-wheel 95, and thereby the screw 9%), the box 98 is adjusted so as to bring the trunnions 97 toward and from the axial line of the trunnions 90. It is clear that when the trunnions 97 are coaxial with the trunnions 90110 movement will be given to the link 83 or reciprocating rod 8% when the oscillating frame 82 is rocked. On the other hand, when the box 98 is screwed downward more and more motion is given to the link 83 and rod 81. It therefore follows. that by adjusting the hand-wheel 9?) the quality of the end-shake or quick-return movement is modified, while by adjusting the hand-wheel 95 trolled. V vided with means for varying its speed such,

By this means the number of reciprocations and also the speed of reciprocations is variable at will. The reciprocating rod 8% is connected with the table by means of :1 lug, plate, or loop 101 through a slot in which the rod 81 extends. This slot or some other adjustable connection is necessary to permit the inclination and adjustment of the table without affecting its connection with the rod 8f. By means of the nuts 111) the compression of the spring 111 can be varied at will to press the rod 81, link 83, and trunnions 97 into lirm engagement with each other. Onead vantage of having these connections spring-pressed together is that no lost motion will be produced by working of the parts, as the spring takes up the wear.

In describing so much in detail the form of the invention which has been selected for illustration'it must not be understood that there is any implication that the invention is restricted to any such minor details. On the contrary,

\Ye claim, and desire to secure by these Letters Patent, the following features, without meaning to imply in any claim features not mentioned or necessarily understood therein:

1. In combination in a concentrator-table, the rittles, and the separating-pieces 12 forming the table-surface and between which the rittles are placed, the said rittles lying between and projecting above the separating-pieces for a. portion only of their length and merging into and continuing between the said separating-pieces toward the tail end, substantially as set forth.

2. In the end-shake mechanism for a concentrator, the pivotally-mounted oscillating frame or member thereof provided with two adjusting-sorews, each having a serew-tlueaded box thereon, a crank and pitman actuating one of the said boxes, and a link actuated by the other of said boxes and connected to the parts to be shaken, the said screws acting to adjust the said boxes toward and from the center of motion of the said frame or member to vary the operation of the mechanism, substantially as set forth.

3. .ln a concentrating apparatus the combination of a lower frame hinged at one end and adjustable vertically at the other, an end-shake Moreover, the crank-shaft 80 is pro mechanism mounted on the said lower frame,

an intermediate frame hinged at one side to the said lower frame and adjustable vertically at its other side, and a table-top mounted to reciprocate longitudinally on the said intermediate frame and connected to be actuated by the said end-shake mechanism upon the said lower frame, substantially as set forth.

4. The table-top for reciprocating concentrating-tables having a rifled upper portion and having an under portion of grooved or channeled timbers extending transversely to the rifles, whereby a light strong table is produced having a minimum of inertia in proportion to its strength, and stiffened longitudinally by the said rifles and transversely by the said grooved or channeled timbers, substantially for the purposes set forth.

5. In a concentrator, a table, the surface of which has in part raised ribs or rifles and in part a roughened and grooved formation, substantially as set forth.

6. A concentrator-table, the surface of which toward the head end has raised ribs or IRA A. (JAMMETT. FRANK E. SHEPARD.

Witnesses:

E. RANsoMn, M. C. RUSSELL.

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