US539804A - Joseph d - Google Patents

Description

(No-Model.)

J. D. GIBBENS & W. B. MURRAY. ELBCTROMAGNBTIU GOLD SEPARATOR.

N 539,804. Patented May 28, 1895.

mm) STATES Fries.

JOSEPH D. GIBBENS AND \VILLIAM B. MURRAY, OF PORTLAND, ORGEON.

ELECTRO MAG N E TlC co LD-SEPARATO R.

PECIFICATION forming part of Letters Patent No. 539,804, dated May 28, 1895.

Application filcd October 20, 1894. Serial No, 526,447. (Ito model.)

To ztZZ whom, it may concern:

Be it known that we, JOSEPH D. GIBBENS and WILLIAM B. MURRAY, citizens of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have invented certain new and useful Improvements in Electromagnetic Gold-Separators; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to improvements in electromagnetic ore separators, and has for its object the provision of means whereby flour gold may be quickly and readily removed from black sand during its course through a sluice in which are located amalgamating devices.

The invention consists of astepped section or extension ofthe sluice-boxcovered with copper plates having lateral grooves therein for the reception of the mercury for amalgamating purposes, the said plates having placed thereon, a series of adjustable electro-magnets having a broad fiat armature or core extension.

The invention further consists of certain details of construction andcombination of parts which will be hereinafter more fully set forth.

In the drawings, forming a part of this specification, Figure l is a side elevation of a portion of a sluice extension with the side pieces removed. Fig. 2 is a plan view of the same. Fig. 3 is an end elevation of oneset of magnets, showing their common armature or core extension and the means for adjusting the same; and Fig. 4 is a plan view of thearmature or core extension of the magnets.

Referring to the drawings, 1 represents a sluice box and 2 an enlarged extension thereof, in which are located our improved devices. lVe form-the said extension into steps 3 gradually leading downward, and cover the said steps with copper plates at having lateral grooves 5, in the upper surfaces thereof.

These grooves are adapted to hold mercury,

and have spouts 6, through which the mercury may be drawn off. The said grooves are also provided at their outer ends with electric circuit wires 7, 7, connecting the same with a suitable source of electricity, by which the mercury is enlivened. At the entrance of the extension 2, we place blocks of wood or other suitable obstructions 8, for the purpose of spreading the material to be treated from the sluice, in thin sheets over all portions of the plates 4.

9, 9, represent a gang of electro-magnets having soft iron cores 10, 10, which are made integral with or are attached to a common broad fiat armature, or core extension 11. One

.gang of magnets with a single armatu re, is located upon each" step 3, and the said armature is supported thereon at aslight distance therefrom, by means of the hand screws 12, 12, which adapt the said magnets with their common armature to be adjusted to and from the saidsteps. The coils 13 of the electromagnets are connected up in'series orin multiple arc, as may be desired. The magnets are located at such a distance from the steps 3 that they will not attract the magnetic particles mixed with the flour gold to them, but are near enough thereto to have such particles within the field of force of such magnets, to counteract the force of gravity upon the saidparticles, causing the same .to flow off with the water and the free gold to be caught up by the mercury in the grooves 5.

The magnets can be adjusted to suit different qualities of sand by means of the screws 12, and a suitable resistance coil may be located between the dynamo or other source of electric supply and the magnets, for regulating the power of the latter.

It will be seen that we have devised a simple and effective device for the purpose, and one which will be Within. the reach of all as to cost. This/has been described in its preferred form, butitis obvious that many minor changes may be made therein without departing from the nature or spirit of our invention or sacificing any of its advantages.

Having now described our invention, what we claim, and desire to secure by Letters Patcut, is V '1. In a device of the character described,

the combination with a stepped extension, of a sluice-box having grooved copper plates thereon adapted to be filled with mercuryfor amalgamating purposes, of electro magnets arranged in gangs, located above the said steps a and provided with means for adjusting the same to and from the said steps, substantially as and for the purpose described.

2. In a device of the character set forth, the combination with a stepped extension of a sluice-box having grooved copper plates thereon adapted to be filled with mercury for amalgamating purposes, of electro-magnets arranged in gangs having a common armature or core extension, located above the said steps and provided with means of adjusting the same to and from the said steps, substantially as and for the purpose described.

3. In a device of the character set forth, the combination with a stepped extension, of a a sluice box, having grooved copper plates thereon adapted to be filled with mercury for

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