US333389A - Grinding or crushing mill - Google Patents

Description

(No Model.) d, 4 shets-s11 eet 1.

T. H. GAR-LIN.

GRINDING 0R GRUSHING MILL.

No. 333,339. 'Patented D30. 29.1335.

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(No Model.) 4 Sheets-sheet 2.

T. H. GARLIN.

GRINDING 0R GRUSHING MILL. V No. 888,889. Patented Deo. 29, 1885.

(No Model.) 4 Sheets-Sheet 3.

T3. H. CARLIN.

GRINDING 0R GRUSHlNG MILL. No. 333,389. Patented Dec.- 29, 1885-.

4 Sheets-Sheet 4p (No Model.)v

T. H. GARLIN. GRINDING 0B. GRUSHING MILL.

No. 333,389. Patented Deo. 29, 1885.

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NITED STATES PATENT Carica.

THOMAS H. CARDIN, OFALLEGHENY, PENNSYLVANIA.

GRINDING OR CRUSHING MILL.`

SPECIFICATION forming part of Letters Patent No. 333,389, dated December 29,1885.

' Application filed December 27, 1884. Serial No. 151,317. (No model.)

To all whom t may concern:

Be it known that I, THOMAS H. CARLIN, of Allegheny, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvementsin Grinding or Crushing Mills; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had tothe accompanying drawings, which form a part of this specification, in which- Figurel isa side elevation, partly in section, of the mill. Fig. 2 is a detail view showing the shaft and hinge. Fig. 3 is a rear elevation of the mill. Fig. et is a side view of the elevator. Fig. 5 is a top View of the pan, with someof the sifter-plates removed. Figs. 6, 7, 8, 9, 10, and 11 are views of certain details.

This invention has relation to grinding or crushing mills, and is particularly adapted to crush hard and refractory materials.

The objects of this inventionare, first, to provide a novel construction of housings or frame of the mill, whereby solidity of construction and great strength are obtained with less material'and labor than are used in the mills as ordinarily constructed; second, to provide a pan of such construction as to be capable of sustaining a great amount of Work with but little liability of breaking or injuring the pan.

The invention consists in the peculiar construction and combinations of parts, as hereinafter more fully described and shown and specifically claimed.

Referring to the accompanying drawings, A represents the frame or housing of the mill, constructed of the upright side pieces, AA, which are cast with the upper portion solid and the lower part forming an arched opening with the legs or uprights A2 A2. This arched construction is capable of sustaining a greater amount of weight with smaller amount of material employed in the construction thereof than if the sides were cast solid. The legs or uprights A2 Az are securely fastened to baseplates A, extending across the foundation. These plates are bolted to the blocks B B, of iron, stone, or other material, which are anchored in the ground at suitable distances apart. The sides A A are joined together near the top by a cross-beam, C, having a conical opening, c, in the center thereof for the reception of the bushing d, in which is journaled the center shaft, D. The upper ends of the side bars, A A', are provided with bearings for the horizontal shaft E, said shaft having coupled to it, by means ofthe clutch e e', the pinion E', which gears with and operates the Wheel D', which is keyed to the center shaft, D. The horizontal shaft E is also provided with a pulley -wheel, E, outside the frame A, through which power is supplied to the mill. The center shaft, D, which, as stated, is journaled in the cross-beam C at c, is supported at its lower end by the conical pedestal or toef, tting into the opening h in the bottom of the shaft. This toe ts snugly in the opening h, so that when the shaft D is turned the toe will turn with it and not wear or enlarge the opening h. The pedestal or toef is supported on blocks i Z,of hard steel or other suitable material, which are placed in the depression j of the block J. This block or baseplate J is made of any desired shape, but is preferably square, as seen in Fig. 9, and has the depression j of the same shape. lc, of slightly-larger diameter than the toe or pedestal f, extends vertically through the block J', for a purpose which will be hereinafter more fully explained.

A hole,

Embracing the pedestal or toe f are two 'A plates of metal, Z Z, resting on the fiange Z'2 on the interior of the base-block J, and held in close proximity to the toe by means of adjusting-screws n n n n, said plates having semicircular recesses on their inner faces fitting the surface of the toe. The plates Z Z are intended to retain the toe in position on the center of the plate z'. The oriiice between the plates ZZ is tapering, the widest part being at the top of the plates, so that when they are brought close together around the toe f the latter will be partially supported by the bearings obtained from the plates.

The object in constructing the toe and its bearings of this particular form is as follows: When it is desired to remove the toe or pedestal f, the links or chains o 0 are fastened to the bottom of the pan in eyes p p, and at the top are fastened to the connecting-pins p2,

which couple the rods p to shaft L. The` screw-swivels q q are then turned, thus raising the pan G, crushing-wheels K K, and their shaft L until their weight is entirely borne on the cross-bar C, instead of being borne on the shaft D and toe f. The plates i 'i' are then drawn out from under th etoef, through opening k', formed in the side of the base-plate J. The screws n n are then loosened, allowing the plates l Z to separate, and the toe f drops or is forced down through the orifice k. When a new toe is to be placedin position, it is raised through opening k, and the plates it" being driven under it the screws n n n a are tightened. The plate t', which supports the toe f, has agroovecut across its face to retain the lubricating-oil that is suppliedto thetoe, and 4 thus-prevent undue wear and friction at the` The toe f and plate are` point'of the toe. made of lmetals which will not weld together, this being necessary to prevent the welding of these parts together, which is liable to occur if .theyare made of metals which readily weld. -The upper end of the central shaft, D, is journaled in the cross-beam C through bushing d. The hole c in the cross beam C is coneshaped, having the base of the cone at the lower part, and the bushing d is of the same i form on its outer circumference, with a flange extending completely around its lower edge.

The bushing d is divided vertically into two parts, (see Fig. 10,) and is held in position in the opening @by means of bolts rr, passing through elongated slots r r in the edge ofthe bushing, and into the cross-bar C. lt will be seen that as the interior of this bushing becomes worn from usage the two parts can be drawncloser together, thus compensating for such wear. The shaft D iseither enlarged at its lower end, or has a collar, F, firmly and rigidly attached thereto to support the pan G, Vwhich is so fastened to the shaft D as to revolve with it.

The grinding or crushing rolls K K, which are either of solid metal or of the peculiar construction shown herein, and which I do not describe more fully, as I have made the same the subj ect of a separate application for a patent, filed December 15, 1884, No. 150,436, are placed on the shaft L and revolve aroundit, their tires either resting on or being in close proximity to the bottoni of the pan G. The

outer ends of the shaftL are held in boxes g g on the uprights of the housings, said boxes being slotted or-recessed at g, to allow vertical play of the shaft, through the medium of the"l guiding-bushes g2 and the inner ends of the shaft L, which is made in two sections, as shown, and hinged to a split collar, M, in such a manner as to allow a vertical motion either when the rolls are lifted by the swivels and rods p p q q or to admit of the passage under the rolls'of a mass of material. Onl account of centrifugal motion, the natural tendency of the rolls K K is to be thrown outward and strike the housings of the mill or the edge of the pan. This l overcome by the guiding-bushes g, placed in the slots at the sides of the housings, saidbushings receiving the thrust of the rolls when the latter are thrown outwardly. The shaft L is further supported near the center by the swivels q q and bolts p p. These bolts are fastened to the 4shaft where it hinges to the collar M, as shown in Fig. 1 of the drawings. The rods pp being forked at their lower ends, each Aend forms an eye which enters between the collar M and the shaft L, the same pin serving as a pintle forvthe hinge on the collar and asa support for the rods p p. The gear-wheel E `is attached to the shaftE by means of the collar and clutch e e', so that the mill can be stopped at any time without stopping the pnlley E and shaft E. The gear E', as will :be

understood, is `loose upon the shaft E, while the clutch member e is adapted to turn with said shaft, and is adjustable lengthwise of said shaft, in the usual way, so as to be broughtz into engagement with or disconnected from the collar or clutch member e, which forms part ofthe gear-wheel E.

The construction in detail of the clutch mechanism need not be described, as such clutches are well known.

The construction of the pan is asfollows:

The body or frame of the pan is made of cast i metal,` and is of -circular form, haviuga raised' cone-shaped guard or ledge, u, slightly higherV than the outer edge, g3, the purpose of this guard or ledge being to prevent the material in the panfrom being banked in the center thereof, and to cause it to fall under the crush.- ing-rolls K K. The hub or center of the pan forms'a collar on its lower side, which rests IOO on the shaft D, and serves to support the pan 1 in position. The center of the pan has a false bottom formed of several plates, fu c '0, of angular shape, so as to completely cover the bottom and surround the guard or ledge. The

outer edges of v these plates are parts of the. circumference of a circle, so that when placed.

in position in the pan their outer edges -will form a complete circle, exactly coinciding with the periphery of the solid part of bottom of The spokes or arms t t-t, which,-

the pan G.

extend from the solid part of the pan Gto its.`

outer edge, are Lf shaped in cross-section, being anged on their upper edges, as shown. Their ends are correspondingly anged, and at the junction of the two anges an offset, w, is formed to receive the end of la segment or tire, T. Behind the vertical-flanges and be2 low the horizontal flanges are formed or fitted thesteps X, upon which said segments or tires rest, said lugs being provided with the bolts rc. These segmental pieces are formed with fianges on their upper edges, which fit over the lugs m on the ends of the spokes or arms t t. Bolts are driven through the ends of the segments and the lugs X, to hold the segments against and in position on the ends of the spokes.

On top of the spokes t t and segments T are placed the sifter-plates w fw w, having their edges closely abutting against one another. These plates are held in position on the spokes by means of bolts y y y, fastened in the tops of the spokes and passing through holes in the edges of the plate, said holes being countersunk to receive the heads of the bolts.

The sifter-plates are made of cast metal with the holes or slots chilled therein.

The feeding and distributing vdevices are shown in Fig. 4 of the drawings, in which l represents a bucket-elevator of any of the well-known forms. This elevator is placed at one side of the pan in such a position that the materia-l from the chute Z, which leads from the annular trough Z, located belowr the outer edge of the pan G, will fall into the buckets of the elevator. A scraper, Z, attached to the frame-work of the pan and moving therewith, travels through the trough Z and forces the contents of the latter toward and into the chute Z. As the buckets are raised,

. the material is delivered to a sieve, 3, having three chutes, 4 5 6. The particles which are sufciently ground to pass through the sieve 3 are carried by chute 4 to the` mill or car for transportation, while those that pass over the sieve are either returned to the mill, for regrinding, through chute 5 or are carried off through chute 6, a suitable gate being provided at the junction of 5 and 6, whereby the refuse may be directed either through 5 or 6.

What I claim is- 1. In a grinding or crushing mill, the combination, with a vertically-adjustable pan and a shaft by which the same is supported and revolved, of means, substantially as shown and described, whereby said pan may be lifted and the shaft relieved of its weight, as set forth.

2. In a grinding or crushing mill, the combination, with a vertically adjustable pan and a shaft through which the same is supported and revolved, of a detachable toe or pedestal secured to said shaft, substantially as shown and described.

3. In a grinding or crushing mill, the combination, with the grinding-rolls and a vertlcal rotary shaft, of a pan provided with afalse bottom formed of separate plates, said plates being retained in position on the bottom of the pan by means of countersunk bolts in the edges of the plates, the bolts being held in position between the plates, substantially as set forth.

4. In a grinding or crushing mill, the combination, with the main frame, the grinding or crushing rolls, the pan, and a verticallyadjustable shaft upon which the pan is supported, of rods or chains attached to the shafts of said rolls and to the cross-beam of the main frame, and means, substantially as described, whereby the pan and rolls may be vertically adjusted, as and for the purpose set forth.

5. In a grinding or crushing mill, the combination, with a rotary pan and apair of grinding-rolls, of a shaft having its lower end recessed, a detachable toe inserted in said recess, a base-block,and plates supporting said toe and shaft, with guiding plates and screws in said block to hold said toe in the center of the plate, substantially as described.

6. In a grinding or crushing mill comprising a rotary pan and a pair of grinding-rolls, the combination, with said pan and rolls, of a vertical shaft having a recess in its lower end, a removable toe inserted in said recess, and a supporting-base having a central oriflce, through which said toe may be removed without displacing the shaft, substantially as described.

7. In a grinding or crushing mill comprising a pan, grinding-rolls, and means for operating the same, the combination, with a pan having radial arms or spokes provided with lugs on their outer ends, of flanged segmental pieces fitting on said lugs and bolted thereto, and sitter-plates resting on said segmental pieces and supported thereby, substantially as shown and described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

THOMAS II. OARLIN.

Witnesses:

A. A. CoNNoLLY, A. A. MOORE.

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