US244564A - Concentrating percussion-table - Google Patents

Description

2 Sheath-Sheet 1.

(No Model.)

M; B. DODGE.

, GONGENTRATING PERGUSSIONVTA'BLE. No. ;244,564. Patented July19, 1881.

a. Pain. Mumm. Wllhingon, n.c

(N0 Modgl.) I 2 sheets-amt 2.

M. B. DODGE.

. CONGENTR ATINGPERCUSSION TABLE.

No. 244,564. Patented July 19,1881.

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, cad/Yd V f To all whom it may concern the heavier concentration will pass, and from inclined table at a point near where the ma- MILES B. DODGE, OF SAN PAT T OFFICE.

FRANCISCO, CALIFORNIA.

CONCENTRATING PERCUSSION-TABLE. I

SPECIFICATION forming part of Letters Patent N0. 244,564, dated July 19, 1881.

application filed October I5, 1880. (1N0 model.)

.Be it known that I,M1:LEs B. DODGE, of the city and county of San Francisco, and State of California, have invented an Improvement in Concentrating Percussion-Tables; and vI do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to certain improvements in that class of devices for concentrating ores known as percussion-tables and my improvements consist in forming in the inclined table, above the point at which the pulp is received upon it, a depression or well, into which 1 which they are continually discharged, while the lighter particles will pass downward with the current of water and be carried away, the action being continuous, as is more fully-described in the accompanying drawings, in whichr Figure 1 is a section of my concentrating apparatus, and Fig. 2 is a plan view.

Percussion-tables, as ordinarily made, are suspended in such a manner as to have either an' end or side shake motion or a combination of both motions imparted to them. The table is set on an incline and the pulverized ore is brought upon it in a state of mechanical suspension in the water, the motion of the table causing the ore so to arrange itself that the heavier grades will sink onto the surface of the table, while the lighter and worthless gangue will pass on down with the stream of water. Riftles, depression-boxes, and various other devices areemployed to collectthe heavier valuable portions, these being placed in the lineof flow of the substances being operated on. In all of these percussion-tables it is commonly necessary to slow down or stop occasionally to push downward or forward the mass of concentrations which collects on the terial is received upon said table. If the motion is not stopped or slackened, the concen-' trated material is at any rate slowly stirred and spread, so it will move downward to the depressions or boxes intended to receive it. When they become filled their contents are removed.

I have found that when the comminuted ore mingled with water is spread on a floor upon the inclined percussion-table the tendency of the heavier portion is to move upward unless, it becomes packed in too heavy masses. This tendency'isstill more marked when the lighter-gangue is Washed away from the pulp as soonasit is deposited on the table, and when a riffle or check is placed on the table just below the point at which the pulp is received;

My inclined percussion-table A is suitably supported in a frame, so that an end-shake motion may be imparted to it by means of the cam B, said cam throwing the table forward and springs B drawing it back., On the reverse movement the lugs G strike against the shoulders O and suddenly stop the movement of the table. The springs B have their forward endsresting against the ends of a vertical spring-bar, W, which is inserted through the center of the head of the table, as shown, and has its ends resting against nuts n on rods n. In returningthe table the elasticity of all the springs B B and W are brought into play. The pulp from the batteries is passed into the sluice D, and goes then onto the distributingboard E, which'is provided with spreaders or distributers e, as shown. The sluice and distributerare inclined in the opposite direction from the percussion-table, as shown, and the pulp is deposited on said table a short distance below its upper'end.

On the percussion-table, a short distance be low the mouth of the distributor, is a riftle, f, and other riffles may also be placed below this on the table. Above the mouth of the distributer, and nearly at the upper end of the table, is a well or depression, G, formed across said table, and provided with an outlet, g, through which the concentrated material constantly passes, the outlet being regulated in size in proportion to the amount'of mineral in the pulp. Over this depression is a perforated pipe, H, through which clean water is admitted to the well or depression, and thence flows on down the table, part of it going out of the hole 9 with the concentration. As the pulp falls onto the table it is concentrated in the usual way, the heavier metallic portion settling to the bottom and the gangue passing off down with the water. The riffle f checks this heavy material, and, when checked, the percussion IOU action of the table tends to move the heavier particles up the incline of the table until it reaches the well or depression G, where it is caught and passes out of the discharge g to 5 a suitable receptacle. The fresh supply of Water coming onto the table through the perforated pipe H flows down over the concentrations, and assists in cleaning them and in carrying off the gaugue. This action is continu- [o ous.

The advantage of the depression or well above the point at which the pulp is received is obvious. It forms a receptacle where the concentrated material is taken out of the way 15 of the pulp. When these concentrations are caught in the boxes or riffles below where the pulp is fed to the table the whole mass of pulp and water passes over them and loss ensues. Here the separating action takes place imme- 2o diately, and the gangue goes one way while the concentrations go the other, both being discharged continuously.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is 2 5 1. In an ihclined percussion-table, a depression or well G, provided with the discharge g above the point at which the ore is received on said table, whereby a recep acle is formed for the concentrations above the flow of pulp, 0 substantially as herein described.

2. The vertical spring-bar passing through the head of the table, in combination with springs B B, rods n, and nuts n, all constructed, arranged, and operated as set forth. 35

In witness whereofl hereunto set my hand.

MILES B. DODGE.

Witnesses:

Guns. G. YALE, J osuru A. BAYLESS.

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