US675872A - Quartz-mill. - Google Patents

Description

No. 675,872. Patented lune 4, I90l. A. FORD. QUARTZ MILL.

(Application filed Oct. 26, 1899.)

(No'ModeL) 2 $hoeta-Shaet l.

: [F i I I Patented June 4, 1901.

A. FORD.

QUARTZ MILL.

(Appiication filed Oct. 26, 1899) 2 Sheets-$heet 2.

(No Model.)

c7444 e m w UNITED STATES PATENT OFFICE.

ARCHIBALD FORD, OF GOLDENGATE, CALIFORNIA.

' QUARTZ-MILL.

SPECIFICATION forming part of Letters Patent N 0. 675,872, dated June 4, 1901. Application filed October 26, 1899. Serial No. 734,850. (No model.)

To all whom it may concern:

Be it known that I, ARCHIBALD FORD, a citizen of the United States of America, and a resident of Goldengate, in the county of Alameda and State of California, haveinvented certain new and useful Improvements in Quartz- Mills, of which the following is a specification.

This invention relates to machines for breaking, crushing, and grinding ores.

One object of the invention is to provide a machine of this class which is of simple and easy construction and will do its work quickly and thoroughly whatever may be the nature of the ore operated on.

A further object is to have a mill that can advantageously be made of any size, from the smallest to the largest, so the same will be available for prospecting and assaying, as well as for working a fully-developed mine.

Rcferefi'ce is had to the drawings hereto annexed fora detailed description of the invention.

In the said drawings, Figure l is a sectional end view of a small portable hand-mill embodying my improvements which is particularly adapted for prospectors and assayers use and is designed to work on ore previously broken up or existing in small pieces. Fig. 2 is'a partly-broken front elevation of the same. Fig. 3 is a diagrammatic view showing the crushing parts of the mill used for breaking the larger pieces of ore preparatory to grinding. Fig. 4 is a miniature representation of as the one represented in Figs. 1 and 2, but made in practice of much larger dimensions and run by power instead of by hand. Fig. 5 is a broken front view, also on a small scale, of the upper part of a power-driven mill such as is shown in end elevation in the preceding figure. is a detailed view of part of the power connections in the latter-named mill. Fig. 7 is a detail showing the construction of the screening lates.

Like re erence-signs indicate like parts throughout the specification and drawings.

The letter A represents an iron box which may be boiled to an 1 suitable base or foundation, as s own in Figs. 1, 2, and 4. In the bottom :1 ads box are placed two chilled-iron shoes c if; shaped so as to receive between 1 larly in the large-sized mills.

them a compound rocker C and under it a set of plates Ddirectly over a bottom discharge E. These few parts are the principal parts of my improved mill.

A is one form of hopper which may be used to let down the ore to be ground into the box A. This hopper is furnished, when desired, with an automatic feed apparatus, particu- As shown in Fig. 1, the shoes B B aforesaid are inclined downwardly from the sides to the middle of the box A and have a wavy surface, on which the ore fed from the hopper A is gradually runs down on them under the rocker 0. They are furthermore provided each with three or four half-round or semicylindrical corrugations 13 B The rocker C is substantially pear-shaped in cross-section point down on the plates Dand the lower edge of either of the shoes B B It is made to fit and engage the hollows and swells of the shoes upper faces when inclined oneither side, and

crushed and pulverized as it and set with its it 1s also provided with laterally and downwardly projecting teeth 0 O opposite the corrugations B B in said shoes. The peculiar shapes thus given to the shoes and rocker are believed to be the best that can be devised to render the ing graduallycecreaslng spaces for-the ore to be ground in, suitable inclines for the mineralmatter toslide down cn, recesses that prevent the comminuted mineral water from flying up, blit rather keep it working or fo cing its 8 way downward, and a contiguous grinding on manifold or compound surfaces until the ore is all reduced to pulp and leaves the mill. I

By preference the lower or grinding part of the rocker G is made point above the teeth 0 C The upper part; in which is socketed the hand-lever or rockerrod 0 is made of soft iron.

The shoes B B are pushed inward toward the rocker G and as they wear out, by means of set-screws passing through the sides of the box A.

G indicates loose plates, one of which isprovided at each end of the rocker O, to prevent the ore from reaching the ends of and getting packed there. These plates afe adjustable and rest edgewise on the bottom mill effective, the same aifordof chilled iron up to a 9g adju d with relation to it,

the box A we of the box. They are suitably cut in their middle lower portion to allow the plates D to pass through.

The main discharge for the ground ore and water with which it is usually worked is the bottom discharge E, hereinbefore referred to. The ground ore, however, is not let directly into the opening E. It has first to pass between the plates D, which are set on edge and supported above the said opening between the lower inner sides of the shoes B B Three or four plates D are provided, not less than two being used inany case. These plates are rough-surfaced and set quite close togetherthat is, about one one-hundredth of an inch apart one from another-or so as to leave interstices that will have the same effect on the ground ore asis secured from a forty to a sixty mesh screen. They act like a screen on the pulp, their rough surfaces or indentations and close setting having the same action on it as a fine screen. In practice these plates are center-punched on one of their vertically-disposed faces, thereby forming projections on the opposite sides which keep them just sufficiently apart to exclude the passage of any but very finely pulverized matter. The projections on any plate are made so as to be more or less alternate with the corresponding depressions on its contiguous plate in order to keep the plates asunder to the extent of the projections only. Rough surfaces would have the same effect. Hence my use of rough-surfaced and indented, as above. From the bottom opening E the pulp falls into an under chute H, Fig. 4, down which it runs into another chute, J, suitably supported on the side of the foundation that the mill rests on. The chute H is open at both ends, so that it may be easily washed out and all the pulp therein secured after a given quantity of ore has been passed through the mill.

There are two side discharges for the mill besides the bottom discharge at E. These consist of the two lateral openings K K covered by the screens L L and discharging into the chutes M M which are bolted to the sides of-the box A. The side discharges, it will be understood, carry away the water and ground ore that splash up upon the rocker 0 being swung over the shoes B B The lower edges of the openings K K and upper edges of the shoes B B are suitably beveled, as shown in Fig. 1, to let the splashing water and ore find their way readily into the side chutes M M The chutes M M drop their contents into the chute J-the same as chute II. (See Fig. 4.) Several means may be employed to work the rocker C-that is to say, to swing it back and forth on the ore dropped between it and the shoes B B--though for the prospectors and adsayers mill it is thought nothing simfiler orbetter could. be used than the plain and lever or rockerrod C hereinbei'ore mentioned, which is inserted in a socket formed in the top of the rocker, about the center thereof. This is all that is necessary to run the mill; but to render its action more positive and regular I provide in addition two outside rods N N which are yieldingly or flexibly connected to the rocker-rod O by a flat spring or else a crossbar C and pivotally connected to the ends of the box A by means of bolts or collar-studs P P passed through eyes in the lower ends of said rods. (See Figs. 1 and 2.) These rods are attached to the box a little below or above, but preferabl y below, the center of the rocker therein and have spiral springs Q Q coiled around their upper ends and confined between handwheels R R thereon and the ends of the bar C below the same. The upper ends of the rods N N pass and slide through holes in the ends of the bar C, which is fastened to the rocker-rod C. it will be seen that the springs assist in grinding by hearing down on the rockep, and at the same time the rocker is able to adjust itself on the ore that is being ground. The hand-wheels allow the springs to be compressed or relaxed at the will of the operator to suit the grade of ore operated on.

When the rocker is swung over to one side a or the other by reason of its fulcruming on the shoe, its point is lifted oif said shoe and the springs compressed by reason of the change of the fulcrum of rods N N which is oi! the center of oscillation of the rocker, and the springs acting to expand to their normal force the point of the rocker onto the other shoe. The pulp therefore runs down easily to the bottom discharge.

In the power-driven mill, Figs. 4 and 5, I make use of two rocker-rods C C to swing the rocker, the same being assisted also by end rods N N, with a crossbar C springs Q Q and hand-wheels R R as in the handmill. To a central rounded portion of the bar 0 is attached one end of a pitman S. (See Fig. 6 in addition to Figs. 4 and 5.) The other end of the pitman S is connected with a crankgear '1, which is turned by a pinion U, secured to a shaft V, journaled in suitable bearings on the frame X, and driven by a pulley Y and belt Z.

Fig. 3 shows the form of rocker and shoes employed for breaking the ore that is in large pieces previously to passing it through the mill represented in the other figures. The rocker C and shoes B B in this view are respectively made with large corrugations 0 and B and are well adapted to receive and crush the coarser or heavier ore between them, These corrugations may be provided only on one side of the rocker and on only one of the shoes, if desired. The shoes B B and rocker Ci are placed in a machine similar to the one hereinahove described and operated substantially in the same way, and in practice I couple the two machines, so that the same. form one continuous mill.

Having now described my invention, what i claim, and desire to secure by Letters Patent of the United States, is-

1. A quartz-mill comprising shoes separated to provide a discharge-opening and having inplates closely set passing through the discharge, and a rocker placed between the shoes above said plates, and havinginclined undulating surfaces complementary to the shoesurfaces, substantially as described.

2. In aquartz-mill,the combination of a box, shoes therein having oppositely disposed crushing-faces and separated at their lower ends, means for adjusting said shoes toward rods and the rocker-rod, substantially as set forth.

7. A quartz-mill comprising a box, wavysurfaced inclined shoes therein, a correspondshaped rocker placed between said shoes, a rocker-rod secured to said rock er, a cross-bar fastened to said rocker-rod, other rods pivotally connected with the ends of said box beyond or 01f the center of the rocker and passing freely through holes in the ends of said bar, springs bearing hand-wheels to regulate the springs, substantially as set forth.

8. A quartzmill comprising shoes separated to provide a discharge-opening and. having inclined surfaces, rough-surfaced or indented plates closely set on edge between said shoes and acting to screen the material passing through the discharge, and a rocker also placed between the shoes above the said plates, substantially as described.

9. A quartzmill comprising shoes separated to provide a discharge-opening, roughsnrfaced plates set on edge close together between said shoes and acting to screen the material passing through the discharge, and a rocker also placed between the shoes above said plates, substantially as described.

ing in its bottom beneath the space between said shoes, and a plurality of resting upon the bottom of said box over the of said shoes close together shoes and adapted to fulcrum at its upper part on said shoes, means acting positively to move the lower end of the rocker from one shoe to the other, when the end of the rocker is lifted by reason of its upper part fulcruming on one of the shoes, substantially as described.

of the shoes substantially conforming to the rocker-surfaces, substantially as described.

11. A rated to provide a discharge-opening, rougnrocker, a rod fulcrumed to said rocker off the center of oscillation of the same, and a yielding connection between the rocking means and said rod, substantially as described.

5. A quartz-mill comprising inclined shoes, a rocker between the same, a rocker-rod secured to said rocker, another rod fulcrumed at a suitable place 01f the rockers center of 1 plates,

yielding connection between the rockerrod and the said other rod, substantially as f 6. A quartz-mill comprising inclined shoes,

above said and means, as set-screws, for adjust shoes against the plates, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ARCHIBALD FORD. [1,. s]

7 suitable places opposite the ends of the Witnesses: rocker, oil the center of oscillation thereof GEO. A. YOUNG, and a spring connection between said other i A. H. STE. MARIE.

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