US923917A - Ore-jigger. - Google Patents

Description

W. M. WILLIAMS.

ORE JIGGBR.

APPLIOATION FILED DBO. a. 190s.

Patented June 8, 1909.

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WILLIAM M. WILLIAMS, OF GRIDLEY, CALIFORNIA, ASSIGNOR OF ONE-HALF TO J. L. MINTS,

- OF GRIDLEY, CALIFORNIA.

ORE-JIGGER.

Specification of Letters Patent.

Patented June 8, 1909.

Application led December 8, 1908. Serial No. 466,516. Y

To all whom t may concern.'

VBe it known that I, WILLIAM M. WILLIAMS, a citizen of the United States, residing at Gridley, in the county of Butte and State of California, have invented a new and useful Ore-digger, of which the following is a specification.

- This invention relates to ore jiggers of the reciprocating screen type, and has for its object to provide an improved screen structure, and also to augment the upward How of the water through the screen, in order to effect a better and more rapid separation.

Vith these objects in view, the invention consists in a novel construction and arrangement of parts to be hereinafter described and claimed, reference being had to the drawing hereto annexed in which- Figure 1 is an elevation of the apparatus, partly in section. Fig. 2 is an enlarged sectional detail of the screen bottom of the jig-box. Fig. 3 is a transverse section on the line 3 3 of Fig. 1.

Referring more particularly to the drawing, 5 denotes the tank in which the jig-box 6 works. The tank is filled with water, and the jig-box is reciprocated therein as usual. The resistance of the water, as the box descends, lifts up the ore, and the particles assort themselves as they settle back, the denser particles being arranged in strata under the less dense.

The j ig-box is suspended in the tank from one end of the lever 7 which is fulcrumed at 8 on standards 9 rising from the tank. To each end of the jig-box is pivoted a link 10 which is connected to a hook 11 carried by and depending from the lever. On each end of the jig-box is also mounted a bracket 12 having a segmental slot 13 in which works a pin 14: carried by and projecting from the links, whereby the movement of the box is regulated.

In the bottom 15 of the jig-box, are outwardly tapering perforations 16, and on said bottom, on the inside of thebox, is mounted a double screen 17 bedded with a layer 1S of granular material, on top of which is arranged a grating comprising rods 19 which ext-end lengthwise of the box, and are secured at their ends to the end walls thereof in any suitable manner. The granular `material is preferably chilled shot. This structure forms a screen which is strong and durable, and which effects a thorough separation.

In the tank, below the jig-box, is mounted a trough 20 which is properly diinensioned to receive the concentrates dropping through the screen bottom of the j ig-box. The jigbox works adjacent to the forward end of the tank, and the trough extends to that end, but is spaced from the opposite end of the tank. The bottom of the trough slopes downwardly in the direction of the last mentioned end of the tank, and the trough is also open at that end. To the bottom of the trough, at its open end, is hinged at 21, to swing in a vertical plane, a gutter 22 which works between said end of the trough and the adjacent end wall of the tank. The

gutter is connected by an arm 23 to a link Y 24 carried by a stein 25 secured to and depending from the lever 7, the stem being connected to the lever on that side of its fulcrum opposite to that from which the jig box is hung. By reason of this connection between the gutter and the lever, it will be seen that when said lever is swung to reciprocate the jig box, the gutter will swing upwardly on its hinge every time the jig box descends, whereby a current of water is forced into the space between the trough and the bottom of the jig-box, and upwardly through the screen, the action being similar to that in the type of jiggers having a stationary screen, through which the water is caused to pulsate by a plunger. By thus combining the actions of the two types of apparatus, a better and more rapid separation is effected. The gutter 22 also serves as a valve closing the space between the trough and the tank walls, and timed to close at the same time the jig box descends, whereby the forcing out of the liquid by the box is prevented; then when the box ascends, this valve trough drops, and discharges its contents below the trough, and permits a moderate discharge of water and material through the pipe 26 to the sluice 27.

The concentrates passing through the screen, drop on the trough 20, and work down the same into the gutter 22, from which they are discharged over the .ends there onto the bottom of the tank. The sand and water is discharged through a pipe 26 leading to a sluice 27 which is located outside the tank, and which is V-shaped in cross-section as clearly shown in Fig. 3 of the drawings, and bedded with shot or an)T other suitable material 28 for catching particles heavier than water, the object being to save the iiner particles of ore. By making the perforations l5 tapering the concentrates passing through the screen are more evenly distributed.

That is claimed is:

l. The combination 'with a tank, a jig-box working therein, and means for operating the jig-box, a trough in the tank below the jig-box, said trough being open at one end, and the bottom of the trough sloping in the direction of said open end, a gutter hinged to the open end of the trough and fitting between said end and the adjacent wall of the tank, and a connection between the gutter and the aforesaid jig-box operating-means.

2. The combination with a tank, a jig-box working therein, and means for operating the jig-box, of a trough in the tank below the jig-box, a gutter hinged at one of its longitudinal edges to the discharge end of the trough and itting between said edge and the adjacent wall of the tank, and means for rocking the gutter.

In testimony thatl I claim the foregoing as my own, I have hereto aiixed my signuture in the presence of two witnesses.

WILLIAM M. VILLAMS.

W'itnesses H. M. SERKLAND, RAY YV. SEAGER.

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