US1409558A - Combination crusher and mill - Google Patents

Description

WITNESSES H. LOEVEN.

COMBINATION CRUSHER AND MILL.

APPLICATION FILED JULY '14. 1919.

Patented Mar. 14,1922.

2 SHEETS-SHEET 1.

' NTOR lid/r2291;08 1/8714 3244a A TTORIVEYS WITNESSES H. LOEVEN.

COMBINATION CRUSHER AND MILL. APPLICATIONVFILEDJULQY 14, 1919.

Patented Mar. 14, 1922'.

2 SHEETS-SHEET 2.

INVEIIVHIJB fiarlyflaezfen ATTORNEYS or dry pulp.

HARRY LOEVEN, DOUGLAS, ARIZONA.

COMBINATION CRUSHER AND MILL.

Specification of Letters Patent. Patented Mar. 14, 1922.

Application flleiJuly 14, 1919. Serial No. 810,547.

ToaZZ whom it may concern: I

Be it. known that I, HARRY LOEVEN, a citizen of the United States, and a resident of Douglas, in the county of Cochise and State of Arizona, have made certain new .and usefulImprovements in Combination Crushers and Mills, of which the following is a speci fication. a

This invention is an improvement in milling, and one of the principal objects of the invention is to provide a mill having means for crushing, milling, classifying, and screening, either wet or dry, ore or rock in one continuous operation. v

Another object of the invention is to provide a rotating drum in which the ore or rock isv milled and crushed, incorporating spaced bars'which form the side walls of the drum and around which is a detachable encircling screen, the ore or rock being milled within the drum and passing be-- tween the bars andthrough the screen into a trough to be conveyed'to anamalgamator or any other. process of further reduction.

Another object is to provide a shaft extending through the drum, rotating in the same'direction as and ata greater rate of speed than the drum and carrying means for mauling the ore or rock within the drum until it'is fine enough'to pass through the spaces between the'bars to the screen.

Another object of the invention is to provide anovel-means of vibrating the screen.

Still another object is to provide an improved mill which will be extremely simple, durable, efficient in operation, and inexpensive to manufacture and maintain, w ich will crush, mill classify andscreen ore and.

rock to any fineness desired andintoa wet With these and other objects .in view, which will become apparent, as the description proceeds, the invention resides in the construction, combination and arrangement of the parts hereinafter more fully described and claimed and illustrated in the accompan'ying drawings, in which like characters,

of reference indicate like parts throughout the several figures, of which: j

Figure 1 is a view showing in side eleva tion one form of combination crusher and mill embodying my invention.

Figure 2 is a view showing in transverse trou section the drum embodied in the crusher and mlll shownin Fi re 1.,

- Figure 3 is a longltudinal section of the drum shown in Figure 2. v

Figure 4 is a detailed perspective view of one of the slug discs comprised in the drum shown in the preceding news.

In carrying out my. invention into use as a quartz mill,I provide a suitable framework indicated generally at 5, associated with which is a drum 6, a hopper 7, through;

which the-ore is dumped into the drum, a slug shaft8 extending axially through the drum, .a trough 9, which receives the milled ore from the drum, an amalgamato'r 10 into which the milled ore is introduced from the 'gh, .and driving mechanism which will appear in detail hereinafter.

The drum includes end walls 11 and 12, respectively, one of which closes the rear end of the drum, except for an opening to receive the slug shaft 8, and the other of which closes'the front end of the drum except for an opening 13 for receiving the discharge end of the hopper 7. Trunnion rings 14. are supported on the end walls of the tated. These are two pairs of rollers, each pair being fixed upon a rotatable shaft .(not

shown); While I have shown means for feeding the drum from oneend, a similar means may beinstalled at the other end also, if desired. V

The slug shaft 8, extends axially through the; drum, being supported in bearings 16 and at its forward end is rotated at a great rate of speed by a belt 16 driven from a suitable source of power and running over a pulley 17 carried by the shaft. The drive from the slug shaft goes from -a pulley 18 at the rear end of the shaft, through a belt 19' to a relatively large pulley 20 mounted on a counter shaft 21, and from this shaft it goes through gears 22 and 23 to one of the shafts duced, is such that the drum is driven in the same directionas the shaft and at. a greatly.

reduced rate of speed. A convenient esti- 0 that the amalgamator 10 is mounted on an inclined shaft 24, having a conical pulley at its lower end taking the drive from a belt 25, running over a smaller pulley 26, carried at the rear end of anintermediate shaft 27, which may be driven from a roller shaft'at its forward end as at 28 from the other shaft. The amalgamator is dIlVGIl at .a low rate of speed and maybe stopped at will by slipping the belt 25 onto an idler pulley '29.

Fixed to the slug shaft 8, at spaced intervals, within the drum, are discs or balance wheels 30, each of which has a plurality of yokes 31 pivoted thereto as at 32. The yokes each support a slug 33, which slug is connected to the yoke by means of a hook or link 34. As the slug shaft rotates the slugs are thrown out by centrifugal forceand rotate in paths slightly spaced'from the wall of the drum, thus inding and mauling the ore which is fed into the drum until it is of a fine enough consistency to pass through the spaces between the bars 35 of which the wall of the drum is composed. These bars are spaced to allow passage of the milled ore through the wall of the drum, and certain of the bars .35 are of a greater width than pthers, to lend rigidity and strength to the structure.

Arranged around, the drum is a continuous screen 36, a space 37 beingdefined between the screen and the 'outer surfaces of the bars 35- and 35. The milled ore-passed into this space through the wall of the drum, by the action of gravity, and by the whipping of the slugs 33, runs through the screen and drops into the trough 9 from which it is delivered to the amalgamator.

It may here be noted that this screen is detachable and may be replaced by any other screen of selected mesh, it being my purpose to use screens of various sizes of mesh, depending upon the purposes to which the mill is to be put, and the material it is, in anyparticular instance, to handle.

The ore which is not fine enough to pass through the screenfinds its way back into the drum through the traps 38. The latter are formed by placing bars 39 at the far edges of diametrically opposed openings or spaces 40, occurring between certain of the bars (the term far edge being considered in connection with the direction in which.

the drum is rotating, as indicated by the arrow in Figure 1,) and by placing corresponding bars 41 on the inside of the drum, the latter bars providing. beveled lips 42 which direct the coarser ore, caught by the bars 39, into the interior of the drum as the traps pass the upper point of their path and start to descend. The lips also prevent the ore passing out into the space 37 through the openings or spaces 40 of the traps.

In order to vibrate the screen a number of spaced vibrating rings 43 are attached to the inner side of the screen and against them a plurality of plungers 44, set in certain of the bars, lay. These plungers have their inner en s reduced to form shoulders abutting against plates 45 fastened to the bars, in order to prevent the plungers from falling out of the bars into the drum. Some of the plungers may have their outer ends headed as at 4. the heads resting between one of the vibrating rings and a ring 47 which encircles the drum and spaces the screen therefrom. The movement of the ore,

as it is milled, over the inner ends of the vibrating plungers, causes these plungers to convibrating the screen.

Although I have described the preferred embodiment of my invention, I may desire to make such changes in the construction, combination and arrangement of parts thereof as do not depart from the spirit of the invention and thescope of the appended claims.

I claim:-

1. A mill of the class described comprising a rotatable drum having pervious walls, a screen surrounding the drum, in. spaced relation thereto, and means connected with the drum and adapted to be actuated by the movement of the material within the drum for vibrating the screen.

2. A mill including a rotatable drum in which ore may be milled, a screen associated with the drum, means for allowing the .milled ore to pass from the drum to the screen, and means connected with the drum and operable by themovement of the material to be milled for vibrating the screen.

3. A mill comprising, a rotatable drum formed of longitudinally extending spaced bars, vibrating rings movably supported on the drum, a, screen supported .on said rings and spaced from said drum, and plungers interposed between the drumand rings in a manner to be angage'd and reciprocated by the material to be milled within the drum.

ently thereof, and slugs flexibly mounted on said shaft and adapted to be thrown outwardly and travel in a circular path adpervious wall and spaced therefrom, and jacent the inner faces of the aforesaid return traps within the inner wall, said spaced bars by centrifugal force. traps including spaced apart longitudinal 10 5. In a mill of the class described, a drum bars, the innermost having one side edge 5 having pervious inner cylindrical wall projecting beyond the other bar and bevthrough which ore milled in the drum may elled inwardly. pass, a cylindrical screen surrounding said HARRY LOEVEN.

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