US25933A

US25933A - howland

Info

Publication number: US25933A
Authority: US
Publication date: 1859-10-25
Anticipated expiration: 1876-10-25

Description

W. H. HOWLAND.

Ore Amalgamator.

Nd. 25,933. Pa tehted Oct. 25, 1859.

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' Z7276 WI I UNITED STATES PATENT OFFICE.

' W. H. HOWLAND, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO HIMSELF AND JOHN O.

HANSOOM, OF SAME PLACE.

AMALGAMATOR.

Specification of Lett ers l Patent No. 25,933, dated October 25, 1859.

T 0 aZZ whom it may concern:

Be it known that I, \V. H. HowLANn, of San Francisco, in the county of San Francisco and State of California, have invented a new and Improved Machine for Pulverizing Gold-Bearing Quartz and Amalgamating the Gold Therein Contained; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawing, making a part of this specification, said drawing being a vertical central sect-ion of my invention.

The object of this invention is to re-grind the tailings of an ordinary stamping quartz mill so that the contained gold and quick-silver may be brought in contact and all the gold amalgamated and saved. In using the and quick silver is lost, the great divisibility of the said substances and a lack of proper union assisted by the presence of sulfate of iron, favoring their escape.

The within described invention consists in the employment or use of a conical grinder in connection with a horizontal oscillating dish provided with annular chambers, the whole being arranged as hereinafter described, whereby the desired object is attained as hereinafter described.

To enable those skilled in the art to fully understand and construct my invention I will proceed to describe it.

A, represents a framing formed of two side pieces a, a, a bottom cross piece 6, and a top crosspiece or yoke c, the form of which is shown clearly in the drawing.

B, is a vertical shaft which is placed in the framing A, the lower end of said shaft being stepped at (Z, and its upper end having its bearing in the yoke c.

C, is a horizontal shaft placed in the upper part of the framing, said shaft having a driving pulley (Z, on its outer and a bevel wheel 6, on its inner end. An eccentric f, is also placed on said shaft. On the upper part of the shaft B, a bevel pinion g, is secured into which the wheel 6, gears, and on' the shaft B, a collar or sleeve D, is placed loosely, said collar or sleeve having a hopper E; and hollow cone F, attached to it,

the inner side of cone F, forming one of the grinding surfaces of the mill.

To the shaft B, a conical grinder G, is attached, said grinder fitting within the hostamping quartz mill much gold low cone F, as plainly shown in the drawmg. On the collar or sleeve D, near its upper end there is a fianch h, and this flanch is directly over an annular plate 2', through which the collar or sleeve passes. The plate Z, is formed in a bar j, the ends of which are fitted on pendent screw rods 70, 70, attached to the yoke 0, the bar j, resting on nuts Z, Z. On the upper part of the collar or sleeve D, a bevel pinion m, is placed loosely and fitted thereto by a feather and groove. This pinion m, rests on a bar n, the ends of which are fitted on the pendent screw rods 70, 7c, and are supported by nuts 0, 0. On the pintle which formsthe step (Z, of the shaft B, a circular dish G, is placed loosely. This dish has a series of concentric annular chambers 10, p, p, formed on its upper surface, the chambers being successively lower, one a trifle more so than the inner one adjoining it, as shown clearly in the drawing. To the under side of the dish h, G, a segment rack g, is attached, and into this rack a pinion 1', gears, said pinion being on a shaft 8, which has a crank pulley t, on its outer end. The crank pulley t, has a connecting rod 10, attached, the upper end of said rod being secured to the eccentric f, by a strap '0.

The operation is as follows :The tailings or pulp is received from the stamping machine, the pulp passing into the hopper E, and the pulp is ground by the action of the cones F, G, which rotate in opposite directions, the pulp being ground as fine as desired by adjusting the cone F, by means of the nuts Z. The ground pulp passes from the cones into the first compartment 79, and

from thence into the second compartment 79, and from p, it passes into 29, the worthless portions being conveyed from the chamber p, by a spout attached to the dish. The dish G, is oscillated by means of the eccentric f, rod a, shaft 8, and rack and pinion g, a". The pulp in consequence of being reground or reduced to a more minute degree of subdivision by means of the grinding cones and also in consequence of having its part-s by means of the grinding and the shake motion in dish G, well mixed or incorporated with each other, the quick-silver will be brought in contact with the gold and the latter amalgamated and thoroughly separated from the foreign substances of the pulp.

I am aware that conical grinding mills tions, with a horizontally oscillating chamhave been long used and arranged in various bered dish G, substantially as and for the 10 ways and I therefore do not claim such depurposes herein shown and described. vice when separately considered but 5 I do claim as new and desire to secure by HOWLAND' Letters Patent- Witnesses:

The combination of a pair of grinding E. T. KING, cones F, G, revolving in different direc- G. T. BOULDEN. p v i