US750075A - Concentrator - Google Patents

Description

No. 750,075. I v PATENTED JAN. 19, 1904.

-' W. G. ANDERSON.

GONGENTRATOR.

APPLI OATION FILED AUG. 10, 1903.

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UNITED STATES Patented January 19, 1904,

PATENT OFFICE.

WILLIAM ANDERSON, OF SAN FRANCISCO, CALIFORNIA.

CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 750,075, dated January 19, 1904.

Application-filed August 10, 1903.

To aZZ whom it may concern.-

Be it known that I, WILLIAM GRANT ANDER: son, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Concentrators, of which the following is a specification.

My invention relates to improvements in" concentrators, the object of my invention being to provide an apparatus of this character which will save a greater proportion of values than those heretofore used.

In concentrating-tables which have a longi tudinal shaking motion and which are adjustably inclined to one side the pulp has a tendency. to flow off diagonally. In prior constructions the dirty water near the feed end of the concentrator carries off the slimes and fine concentrates before they have time to settle or get the benefit of the clean water. There is thus considerable loss of values. It is the object of my invention to avoid this.

My invention therefore resides in the novel construction, combination, and arrangement of parts for the above ends hereinafter fully specified, and particularly pointed out in the claim. g

In the accompanying drawings, Figure 1 is a plan view of the concentrator. Fig. 2 is a longitudinal section thereof. Fig. 3is a transverse section. Fig. 4 is a detail of a roller of the lateral trough. Fig. 5 is avertical section of the transverse trough- Fig. 6 is a crosssection of the feed-box. Fig. 7 is a broken longitudinal section of the same.

Referring to the drawings, 1 represents the supporting-frame for the concentrator, and 2 represents the table itself, which is lower on Said table is divided into upper and lower portions by a drop 3, extending transversely across. the table, said drop being of sufficient depth to allow a trough 4:, extending the entire length of the drop, to return the pulp from the lower side of the table to the upper side thereof. The table is covered with linoleum 5 and has longitudinal riffles 6 both on its upper and lower portions. These riffles catch the concentrates or values as the pulp which is discharged from the pulp-box 7 at the upper or feed end Serial No; 168,899. (No model.)

of the table flows sidewise toward the lower side thereof; but as the table is also inclined longitudinally downward from said feed end said pulp moves in an oblique direction, and before it flows off the side of the table into the tailings-discharge box Sit is conducted, by means of a series of spouts 9, into the trough 4, which is inclined downward toward the upper side of the table, and therefore reconducts the pulp to the upper side thereof. In said trough 4. are a series of holes 10 about three inches apart, closed by plugs 11, which can be removedto allow the pulp to flow out at any desired point upon the lower portion of the table, where it is now exposed to the action of the clean water from the clean-water box 12. Thus the slimes and light concentrates have a chance to settle.

The riffles or grooves are of uniform length, from three-quarters of an inch to two inches apart. according to the ore that has to be treated. Their height diminishes gradually to nothing at the end of the table.

The shaking motion of the table may be produced by any suitable means, as by an eccentric 13 on a shaft 14, said eccentric being connected to the table by a link 15. The table is supported on half-round bars 16, which reciprocate upon rollers 17. The inclination of the table is adjusted by screws 18.

It will be understood that I do not confine myself to a single drop in the concentratingtable, as I may use two or more drops, accord- A concentrating-table sloping to one side 7 and provided with means for imparting thereto a longitudinal reciprocating movement and consisting of upper and lower portions located longitudinally or endwise of each other each portion sloping longitudinally downward from the feed end of the table, said portions having a transverse drop therebetween, each portion having longitudinal riffles, the riflies of the upper portion extending down to said drop, a trough at said drop for conveying the pulp to the upper side of the table, said trough having holes for distributing the pulp upon the lower portion of the table, and means for removably and selectively closing said holes,

and a series of spouts inclined downward toward the upper side of the table, and discharging from the upper rifiies into said trough, in combination with means for dis: charging the pulp upon the upper portion and water upon the lower portion, substantially as described.

In witness whereof I have hereunto set my hand in the presence of two subscribing witnesses.

W. (ir. ANDERSON. Witnesses:

F. M. W RIGHT, BESSIE GORFINKEL.

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