US653679A - Machine for crushing ores, &c. - Google Patents

Description

No. 653.679. Y Patented July I7, |900.`

s. w. KIMBLE.

MACHINE FOR CRUSHING DRES, &.c.

(Application filed Feb, 21, 1899.) (N0 MOIiBL)` 2 Sheets-Sheet I.

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nu. 653,679. Patemeduuuy I7, |900. s. w. KIMBLE.

MACHiNE FOB CRUSHING DRES, GLC.

(Application led Fab. 21, 1899.)

2 Sheets-Sheet 2,

(No Model.)

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PATENT SMITH W. KIMBLE, OF NEW YORILN. Y.

MACHINE FOR CRUSHING oREs, eac.

SPECIFICATION forming part of Letters Patent No. 6553,679, date July 1v, 1906.

Application filed February 21,y 1899. Serial No. 706,397. (No model.)

To @ZL w/wm t 1i/tay concern:

Be it known that I, SMITH W. KIMBLE, a resident of New York city, State of N ew York, have invented a new and useful Improvement in Machines for Crushing Ores and the Like, which invention is fully set forth in the following specification.

Thisinvention relates to machinesfor crushing ore and for similar uses; and its object, briefly stated, is to produce the maximum effect with a minimum of Wear. By the mill herein described and in which the invention is carried out it has been found practicable to crush hard quartz to such iiueness that it will pass through a screen of two hundred mesh. The crushing force is under perfect control and can be regulated at will to produce any desired degree of fineness.

' At the present time most of the work of orecrushing is effected in the common stampmills, and though many attempts'have been made to supplant these clumsy machines they have met with indifferent success. Several types of ore-crushers employing rolls have been brought forward and used to some extent; but the tendency in use is to Wear corrugations in the surface of the rolls, so that the product becomes lacking in uniformity. Owing to the character of the work done, and the tremendous force expended upon small areas, it has been found extremely diiiicult to design and construct machinery that will maintain its initial efciency for any considerable period of time or which does not require frequent and expensive repairs.

According to the present invention the ore or other material to be pulverized is ground between a stationary surface or die, which is, in fact,an inverted mortar,and a movable surface or muller, the latter being beneath the former, so that the apparatus maybe appropriately termed an inverted-muller mill. The die or mortar is annular in shape, the central opening serving to admit the material, which latter immediately spreads out after passing the opening into a relativelythin layer between the muller and mortar, so that the crushing force is exerted under the most favorable conditions. The opposing surfaces of the inverted mortar and the muller gradually converge, approaching closest at the extreme outer circumference of the former, which is several times the circumference of the admission-opening. This disrh `position of the partsproduces another important result-namely, uniform and free feed by gravity. The muller is mounted on an upright shaft, to which a movement of nutation is imparted by means of an eccentric. The muller is supported by a rod or equivalent means, to which any desired degree of tension can be imparted by appropriate regulating devices, which can be of anyrsuitable construction. The muller can thus be brought to bear against the lnortar with any desired degree of pressure. It is observed that in the operation of the machine the muller being turned by the eccentricin one direction rotates slowly on its own axis in the opposite direction, the rate of this incidental reverse movement. being about one-sixth that of the positive movement derived from the driving-shaft. This movement is of great utility in that it constantly changes the wearing-surfaces, preventing excessive Wear on particular parts.

Other features of improvement Will be expla-ined in connection with the accompanying drawings, in Which- Figure 1 is a vertical sectional View of a large-size machine mounted on a foundation of brick or the like. Fig. 2 is a perspective View of a smaller portable machine. Fig. 3 is a perspective view of the casting Which is secured under the base-plate and in which the driving-shaft has its bearings; and Fig. 4L is a top plan view of the base-plate, showing part of the casting projecting into the opening therein.

Referring to the drawings, A represents the base-plate of the machine, which, as shown in Fig. l, is mounted on a suitable foundation of brick or stone, this being the mounting preferred for large-sized machines and for a series of machines arranged in a row.

In Fig. 2 I have shown the base-platesupported on legs, this being the mounting preferred for smaller machines intended to be readily portable. In other respects the mills of Figs. l and 2 are the same. y

Through the middle of base-plate Aris a four-armed opening a. the plate is secured by bolts b b a one-piece casting B. (See Figs. l and 3.) Casting B IOO To the under side of consists of a top plate o, having at each end a depending arm d, said arms being connected at their lower extremities by a bridgepiece e. In one side of the bridge-piece, midway of its length and between lugs g g, projecting therefrom, is a semicircular bearingf. On the plate o and about a central crossshaped opening c therethrough are upwardly and downwardly projecting flanges h and t', respectively. When casting B is secured in place, the llange h thereon fits closely in the central part of the opening a, as clearly shown in Fig. 4, leaving the ends of the arms of said opening unoccupied, except by the headed ends ofset-bolts k, which pass through screw-threaded openings in the flange h, and are thus rendered accessible for adjustment. Corresponding bolts ZZ pass through the sides of the lower flange 'L'. At their inner ends the bolts k and Z bear against bearing-ltlocks'm, four in number and each having a concave bearing-face, one of said blocks being located in each of the four arms of the cross-shaped opening c (through plate c) and within the flanges h and t'. By turning the bolts blocks 'm may be adjusted to take up wear.

N is a vertical shaft hearing at its upper end between the concave faces of blocks m and at its lower end in the semicircular recessf in bridge-piece e and a similar recess formed in a block f, secured to bridge-piece e, between the lugs g g thereon, as shown in Fig. 1. On the shaft between its bearings. is a driving-pulley N', through which the shaft may be rotated from any suitable source of power.

At its upper extremity shaft N carries head N2, having an upwardly-opening circular recess otherein, located eccentrically to the axis of the driving-shaft and in which is the bearing for the lower end of the muller-shaft Q. Said bearing consists of three parts-an ou ter ring p, fitting closely within opening 0, aball 10', having a central perforation therethrough in which the lower end of the millier-shaft Q loosely engages, and an intermediate bushing p2 between the ring 19 and the ball p, the inner face of bushing p2 being of such curvature as to closely fit the surface of the ball, while permitting the same to turn freely therein, all as clearly shown in Fig. l. The bushing p2 may of course be cast about the ball in any suitable manner.

Above the base-plate A is a casing R, di-

vided interiorly into two compartments by an' inclined partition r, formed at its lower end with a discharge spout fr', which passes through an opening-fr2 in base-plate A. (See Fig. 4.) Casing R is open at one side to give access to the lower compartment, in which are located the head N and other parts associated therewith.

Over the upper open end of the casing is mounted a cap S, having a central opening therethrough, while on its upper surface are three upwardly-extending converging arms s, supporting a tube s. T is theannulanshaped essere 7', made suilciently large to allow for the movement of the shaft. To prevent thepulverized ore from passing through this opening and down into the bearing for the lower end of the shaft, where it would do much damage, said opening is surrounded by a curved plate q', upon which rests a ring q? A similar ring q2 rests against a shoulder on the millier-shaft, and between these rings-and about the shaft is a coiled spring if, which exerts its tension to hold ring q2 tightly against the plate q to prevent pulverized ore or dust from passing between the meeting surface thereof and through opening q, at. the same time permit-ting vertical movement of thev muller-shaft without affecting the connection. A hood t', of canvas or other fabric, connected between the edges of rings q' and q2, serves to completely inclose the springt.

On the in uller-shaft Q and resting against the ring q2 is a disk U. Muller V, practically ot mushroom shape, rests agaiustdisk U andis secured thereto by bolts u, preferably cast into the mullet', as shown in Fig. l, and passing through perforations in the disk U. It will be observed that the muller is located ou the upper portion of its shaft near the fulcrurn, while the radius of the base 0f the muller is longer than the distance fromv the center of the base to the fulcrum of .the shaft. The upper acting face of the muller has a downward inclination of about thirty degrees. The acting face of the die or inverted mortar has a slightly-greater inclination, so that the two surfaces gradually converge toward their peripheral edges, at which point they most nearly approach. In other words, the space inclosed between the acting faces of the mortar and its muller diminishes in thickness from the center outward. Owing to the comparatively-slight slope or inclina.- tion of the face of the muiler the material under treatment does not fall through until it has been uniformly crushed to the desired extent.

At its upper extremity shaft Q has an eye w, and beneath said eye is a ball w', bearing loosely in a bearing-ring to2, free to slide in tube s'. On the upper end of tube s are mounted piece washer w', rubber block 002,v Washer ma, and ak hand-wheel y, in the order named. Bearing-balls y are interposed between the piece a; and washer, and. hand-V wheel y engages the screw-threaded end of a,

rod z, connected at its lower end to eye w ofv shaft Q by a link z' and projecting upwardly IOO IOS

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'through tube s', piece rt, washer block fr?, and washer x3. Thus by turning the wheel 'y the acting faces of the mortar and muller may be moved toward or from each other to regulate the fineness to which it is desired to crush the ore or other material. In case noncrushable pieces of material are fed between the crushing-surfaces the extreme downward pull on rod e' will compress the block x2 and allow the substance to pass between the surfaces without breaking the machine.

In the operation of the machine the material to be crushed is fed into the hopper S and passes down onto the upper face of muller V. At the same time by the rot-ation of shaft Q a movement of nutation is imparted to the muller V, causing it to approach the mortar T at a point which constantly changes, while receding therefrom over the remainder of its surface. The crushed ore is delivered into the upper compartment of casing R in a continuous stream from the periphery of the muller V, while fresh material is constantly descending by gravity through the central opening in the mortaiinto 'the space between the crushing-surfaces. While the muller V and shaft Q are being turned in one direction by the eccentric connection with the driving shaft, they are caused to slowly rotate on their'axis in an opposite direct-ion, such rotation being transmitted to the hand-wheel y, which, together with the washers or and 503 and block m2, turn on balls y. This produces a true rolling movement which has been observed in the practical operation of the machine and serves to constantly change the relative positions of the muller and its mortar, whereby excessive wear at particular points is avoided. This rolling movement also prevents scraping or grinding action between the muller and its mortar, which is entirely distinct from the crushing accomplished by my machine. The fineness to which the ore is crushed may be regulated by turning hand-wheel y to raise or lower rod e, thus raising or lowering the muller V.

The material to be crushed is in comparatively-large lumps when it first falls through the central opening into the space between the mortar and itsl muller. Atthis place the greatest crushing force is required, and it is here that my construction provides the great-v est leverage. As the material is broken into smaller lumps it passes by gravity outward overamore extended surface. v Consequently it is spread out into a layer, becoming thinner and thinner, so that it is more easily operated on. As the partly crushed material thus spreads out less crushing force is required, and here my construction providesa gradually-lessening leverage. Thus the maximum results are obtained with the minimum of force and wear.

Having now fully described my said invention, what I claim isl. In a crushing-machine, a muller, a shaft for the muller, a mortar cooperating with the muller, a yielding support for the shaft, and means for actuating the shaft to impart a movement of nutation to the muller.

2. In a crushing-machine, a muller, a shaft for the muller, an inverted mortar overhanging and cooperating with the muller, a yielding support for the shaft, and means for actuating the shaft to impart a movement of nutation to the muller.

3. In a crushing-machine, a muller, ashaft for the muller fulcrumed at its upper end so as to be capable of movement in a longitudinal direction, but fixed against movement in a lateral direction, an inverted mortar overhanging and cooperating with the muller, a yielding support for the shaft, and means for actuating the lower end of the shaft to impart a movement of nutation to the muller.

4. In a crushingmachine, a muller the crushing-face of which is of comparativelyslight convexity, an overhanging inverted mortar whose crushing-face is of somewhatgreater eoncavity, the intermediate space between said crushingfaces diminishing in width as it recedes from the center, a mullershaft yieldingly supported from above and fulcru med at its upper end, and means at the lower end of said shaft for imparting a movement of nutation thereto.

5. In a crushing machine, an inverted muller whose acting face is approximately that of a cone of low pitch, an inverted mortar over-hanging and cooperating with the muller, the crushing-face of the mortar being also of low pitch, a shaft for the muller, a yielding support for the shaft, and means for actuating the shaft to impart a movement of nutatiou to the muller.

6. In a crushing machine, an inverted IOO muller whose acting Aface is approximately that of a cone of low pitch, an inverted mortar overhanging and cooperating with the muller, the crushing-face of the mortar being of greater pitch than that of the muller, a shaft for the muller, a yielding support for the shaft, and means for actuating the shaft to impart a movement of nutation to the muller.

7. The combination with an inverted muller whose acting face is approximately that of a cone of low pitch, and an overhanging inverted mortar whose acting face is of a somewhat-greater angle, of a muller-shaft yieldingly supported from above, and a shaft having a head with a seat eccentrically located thereon for actuating said muller-shaft.

8. In a crushing-machine, the combination of a muller-shaft having a yielding support and a positive fulcrum at its upper end, an inverted muller thereon whose acting face slopes at an angle of about thirty degrees, an overhanging inverted mortar whose acting face is at a slightly-greater angle than that of the muller, and means for imparting a movement of mutation to said shaft, substantially as described. h

9. In a crushing-machine, the hub rising from the hopper, the yielding su pport carried thereby, the mller-shaft upheld by said support and having a positive fulerum at its u pper end, and the inverted mnller fast on the upper portion of said shaft, in combination with an overhanging inverted mortar, and

means for imparting a movement of mutation lo to said shaft, substantially as described.

In testimony whereof I have signed this speeieation in the presence of two subscribing witnesses.

SMITH W. KIMBLE. Witnesses:

ELISHA K. CAMP, C. A. L. MAssm

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