US365717A - Crushing and grinding mill - Google Patents

Description

(No Model.) 2 Sheets-Sheet 2..

J. 1 WINGHELL. RUSHING AND GRINDING MILL.

` Pate'nt'eduJune 28, 1887.

NiTnD STATES PATENT Ormea JAMES F. W'INOHELL, OF SPRINGFIELD, OHIO.

CRUSHING AND GRINDING lVlILL.

SPECIFICATION forming part of Letters Patent No. 365,717, dated June 28, 1887.

l Application filed September 18, 1886. Serial 'No.rl. (No model.)4

To all whom, it may concern:

Be it known that I, .Lunas F. WrNci-IELL, a citizen ofthe United States, residing at Springfield, in the county of Clark and State ofOhio, have invented certain new and useful Improvements in Crushing and Grinding Mills, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in crushing and grinding mills, and it consists, first, in means for mounting one of the stationary grinding-plates in such a manner that it may be adjusted to secure alignment with the rotary grinding-plate which co-operates with it and still be held to the casing of the mill, no matter what may be the adjusted position; second, in means for securing the rotarygrinding-plates to a grinding-wheel mounted upon the main shaft of the mili; and, third, in means foradj usting first one of the rotary grindingplates with respect to one of the stationary grinding-plates, and for next adjusting the other stationary grinding-plate with respect to the other rotary grinding plate, both adjustments being accomplished through a common screw, all as hereinafter more specifically set forth and claimed.

In the accompanying drawings, forming a part of this specification, and on which similar letters of reference indicate the same or corresponding features, Figure 1 represents a plan view of the lower half of the main portion of the mill-casing, and also shows the operating parts mounted therein, partly in section; Fig. 2, an enlarged sectional view of a portion of the casing and the means for adjusting and holding one of the stationary grinding-plates; Fig. 3, a sectional view of another portion of the casing, showing the manner of mounting one of the yoke-supports; Fig. 4, a side eleva-v tion of one of the rotary grinding-plates,show ing the manner of mounting the saine; Fig. 5, a like view ofthe rotary grinding-wheel with the grinding-'plate removed; Fig. 6, apartial view ofthe grinding-wheel and one of the clamps; Fig. 7, a plan view in continuation of Fig.1, but on a smaller scale; and Fig. 8, an enlarged sectional view of the grinding plates, the grinding-wheel, one of the clamps, and thc several devices in immediate juxtaposition therewith.

The letter A designates a suitable framework,upon which the casing is mounted, and the letter B the casing, the same being preferably constructed of cast-iron,and consisting of a crushing chamber, C, a gririding-chamber,

D, and being otherwise substantially like the casing illustrated and described in Letters Patent No. 342,158, May 18, 1886. This casing is provided with journal-boxes E, F, and F', in each of which asuitable bushing of Babbitt metal is fitted.

At G the casing is provided with an aperture coincident with the aperture in the upper portion of the casing, (a fragment of which is shown at H in Fig. 8.) These portions of the casing-are also channeled at I, to receive one end ofthe yoke-supports J, which terminate in crossheads fitting the said apertures. Vhen the two portions of the casing are secured together, these supports are firmly held, and upon them is mounted ayoke, K, andadouble set of nuts, L and M, serve to hold the yoke upon the supports wherever adj usted, as also to allow of adjusting the yoke back and forth, as by unscrewing one set of nuts and advancing the` other toward them. The purpose of thus adjusting the yoke will be presently explained.

A standard, N, extending from the yoke carries an L-shaped latch or dog, O,which serves to lock the adj usting-wheel P by engaging one or the other of its notches.

The letter Q designates a sleeve fitted to the Babbitt bushing F, and is constructed to move back and forth, but not to rotate, and is formed on its inner end with a disk, R, the face of which is provided with an annular bead, T, as also with an annular recess, U, and with apertures to receive the bolts V. To this disk is secured enc of the stationary grinding-plates W by means of the bolts V, the heads of the bolts being countersunk, so as to be flush with the face ofthe grinding-plate. This plate is in the form of an annulus, the inner periphery of which extends somewhat into the annular recess U in the disk R, While the face X of said annulus is provided with a series of grinding teeth or protuberances. The outerend of said IOO to the thread in the yoke AK--say a left-hand thread and the yoke a right-hand thread, both being of the same or about the same pitch. The sleeve further carries a Babbitt or other bushing, b, to which is fitted one portion of the mill-shaft c, another portion having a bearing iuv the bushing E. This shaft carries a crusher, d, of any approved construction-as, for instance, of the kind illustrated in Letters Patent granted to me, as above mentioned. This Crusher also acts as a conveyer to convey the crushed material to the grinding-plates. Upon this shaft is also mounted what I tcrina gri riding-wheel,77 e. (Shown more clearlyin Fig. 5.) The wheel is constructed with aseries of, say, four recesses, f, in the rim thereof, and with holes g .running from said recesses outwardly through the rim, the recesses being for the reception of the heads of the bolts h. These bolts pass through clamps fi, and are provided withjam and binding nuts j. The inner faces of the clamps are provided with grooves 7c, the outer walls of which are inclined, as seen in Fig. 1, while the rotary grinding-plates are constructed with segmental lugs Z, the outer faces of which incline to agree with the outer walls of the grooves 7c, and are fitted to said grooves. These plates are of annular form, and are provided with annular rims or surfaces m, which agree with like surfaces a, formed on either side ofthe rim of the wheel e.

The rotary grinding-'plates are placed with these surfaces against those on the rim, and by operating the nuts on the bolts 7L the clamps i are drawn centrally and impinge tightly against the lugs l on the rotary grinding-plates. These plates are provided with a series of grindingteeth or protuberances upon their surfaces opposite the respective stationary grinding-plates.

It will be observed that by the meansjust described the rotary grinding-plates are rmly yet detachably secured to the grinding-wheel. The stationary plate W is constructed like the plate V, but is differently secured. Bolts o--one preferably at. either side, in about the saine horizontal plane as the axis of the main shaft, and one beneath said shaft and near the bottom of the plate (not shown)-are fitted to screw-threaded bushings p, which in turn are fitted to threaded apertures in the casing B, and are provided with jam-nuts q. The inner ends of the bushings form shoulders, against which the plate WV is held by the bolts 0, and by turning the bushings the plate is adjusted back and forth to the proper position to secure alignment with the adjacent rotary grindingplate, the jam-nut g serving to hold the bushing to any adjusted position.

The letter r designates afwasher, and s an anti-friction wearing-plateinterposed between the mill-shaftcandtheadjusting-screwt. This screw is provided with right and left hand threads to fit, respectively, the threads in the yoke K and in the nutZ. j

I will now refer to the uses of the yoke K,

the screw t, the wheel P, and the nut a in respect' to adjusting the grinding-surfaces with proper relation to each other.l In the first place, the shaft c, with the grinding-wheel and the rotary grinding-plates, is placed in its bearings, as also the sleeve Q, the disk B, the stationary grinding-plates WV and Wand secured in place. The first adjustment to be effected is that between the nonrotating grindingplate W and therotary gri nding-plate adjacent to it. This is done by operating the adjustingwheel l and rotating the screw t, to allow the shaft c to move in the direction of the adjusting-wheel under the influence of the spring or of gravity, as will presently appear, it being understood that the first relative position between the non-rotating grinding-plate WV and the adjacent rotary grinding-plate is with a space between them. i When the `main shaft shall have moved in the direction just indicated far enough to bringthe rotary grindingplate the proper distance-from the non-rotating grinding-plate NV, the wheel P is stopped andthe dog O dropped into one ofits notches.

The remaining adjustment to be effected is that between the other rotary grinding-plate and the non-rotating grinding-plate W. This is done by turning the nuts L away from the yoke K, and then turning the nuts M against that yoke and forcing the screw t, the main shaft, the grinding-wheel, the plates attached to it, the non-rotating-plate W, the disk B,the sleeve Q, and the nut a toward the stationary plate YV. This action of the yoke is, continued until the proper relative position between the non-rotating grinding-plate W and the adjacent rotary grinding-plate is obtained, when the nuls L are screwed against the yoke to hold it. adjustment does not disturb the adjustment previously made between the plate W and the adjacent rotary grinding-plate.4 The adjustment between the non-rotatinggrindingplate NV and its rotary grinding-plate,asjust described, is only made when the machine is set up. The subsequent adjustment between each non-rotating grinding-plate and its adjacent rotary grinding-plate is effected in the following manner:

Let it be supposed that a space of one-sixteenth of an inch exists between the respective non-rotating grinding-plates and the rotary grinding-plates, and that it is desired to grind the material more finely. The adjustingwheel P is rotated in the direction of the ar- 'row and the screw t turned in the yoke K, which moves the shaft c away from the yoke, and also carries with it the sleeve Q, by reason of the bodily advance of the screw t. `Vhen the space between the non-rotating grindingplate Wand its adjacent rotary grinding-plate has been taken up, the space between the nonrotating grinding-plate NV andits adjacent rotary grinding-plate will also have been taken up, notwithstanding that these latter two plates both move in the same direction under thein- It should be noted that this latterV IOO IIO

fluence ofthe screw t, operating'from the yoke K. Vhen, however, this has taken place, the action of the screw t in t'ne nut a, by reason of the left-handed threads, moves the sleeve and its disk and the non-rotating grinding-plate "W an additional one-sixteenth of an inch independent ofthe movement of the shaft c, thereby closing this space between lthe non rotating grinding-plate W and its adjacent plate, although both move one-sixteenth of an inch during the closing` of the space between the non-rotating grinding-plate V and its rotary plate.

As seen in Fig. 7, the main shaft is provided with a y-wheel, a, and a driving-pulley, '0. A spiral spring is interposed between the hub ofthe driving-pulley and thejournal-box, for the purpose ot' forcing the operating-shaft normally in the direction ofthe non-rotating grinding-plate NV.

It will be no tieed from Figs. l, 4, and 5 that the position of the sides of the spokes e of the wheel e is oblique to the axis ofthe main shaft. The object of this arrangement is to cause the spokes toact as conveyers,to assist in drawing the material to be ground from the grindingplates adjacent to the crushing-chamber to those at the opposite side of the wheel. The space between the spokes, the rim, and the hub allows the passage ofthe material; but to be thoroughly effective there should be something to act upon the material. This action is accomplished by the spokes.`

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, .is-

1. In a grinding-mill, thec'ombination, with the non-rotating grinding-plates and rotating grinding-plates, of a screw having right and lefthandcd threads, a nut connected with one ofthe non-rotating plates, and with which one of said threads engages, a support having a thread with which the other thread on the screw engages, and means for actuating said screw.

2. In amill,the combination,with thenon rotating grinding-plates and the rotating grinding-plates, a shaft upon which the latter plates are mounted, and means, substantially as de scribed, for urging said shaft in the direction of one of said non-rotatinggrinding-plates, ofa screw having a right and left hand thread, a nut connected with the non-rotating plate toward which the shaft tends, and with which one of the said threads engages, a support having a thread with which the other thread on the screw engages, and means to rotate said screw.

3. In agrinding-mill, the combination, with the frame, two non-rotating grinding-plates and two rotating grinding-plates, and a`shai`t upon which the latter plates are mounted, and means, vsubstantially as set forth, for pressing the said shaft in the direction of one of the non-rotating plates, of a screw having a right and left hand thread, a sleeve having a nut and a disk connected with the non-rotating plate toward which the shaft tends, a yoke supported by the frame, and an adj Listing-wheel mounted on said screw, one of the threads of thescrew being iitted to the yoke and the other to said nut.

4. In a grinding-mill, the combination of the two non-rotatinggrinding-plates, the sleeve to which one of said plates is attached, and having a nut, a shaft, means for urging said shaft toward the last-mentioned plate, a wheel mounted rigidly thereon, rotating grindingplates secured to said wheel, and a right and left hand threaded screw, a notched adjustingwheel, a yoke supported by the mill-casing, the said screw being mounted in said yoke and said nut, the whole being constructed to permit of the adjustment between one of the rotating grinding-plates and one of the nonrotating grinding-plates by actuating the screw and the adjustment between the other rotating plate and non rttating plate by operating the yoke.

5. In a grinding-mill, the combinatiomwith the non-rotating plates, shaft-bearings, a shaft,

and rotating grinding-plates, of a commonv adjusting-screw, a threaded bearing for said screw, having a fixed relation to one ofthe nonrotating plates, and an adjustable threaded bearing, with which said screw engages,whereby upon moving theadjustable bearing the adjustment between one ofthe non-rotating plates and one of the rotating plates is effected, and n pon rotating said screw the adjustment between the other non-rotating plate and the other rotating plate is eifected.

G. In a grinding-mill, the combinatiomwith IOO the main shaft, a wheel rigidly mounted thereon, and clamps carried by said wheel, of grinding-plates fitted against said wheel and held thereto by said clamps.

, 7. In a grinding-mill, the combination, with the main shaft and a wheel rigidly mounted thereon, its rim recessed and bored, and grooved clampshaving inclined walls, ofgrind ing-plates fitted against said rim, segmental lugs with tapering sides extending from said plates and iitted into said grooves, and bolts to bind the clamps against the said lugs.

18.' In a grinding-mill, the combination, with a frame, shaft-bearings thereon, a longitudinally-movable shaft, rotating grinding-plates mounted thereon, and non-rotating grindingplates, of a doublethreaded screw connected with one of said non-rotating plates and tted to act against said shaft, threaded bearings for said screw, and means to rotate it, whereby its rotation adjusts all the said plates with proper relation to each other.

9. In a grinding-mill, the combination, with the feed-chamber, the main shaft, a wheel mounted thereon and having the sides of its spokes placed obliquely toits axis, and grinding-plates secured to said wheel, and having feed-openings through them, of non-rotating plates, one of which has an opening through it, the openings in the plates being substantially opposite thespaoe between the spokesmhereby Wheel, rotating grinding-plates secured to said the material in being fed can pass from one set of Wheel, and stationary `gfrinding-plates, one of grinding-plates to the other set of grindingthem having a feed-opening opposite the replates through the action of the spokes. spective rotating plates.

10. In agrinding-mii1,the combination, with t In testimon7 whereof I affix my signature in the easing having a chamber from which the presence of two Witnesses. material is fed, of the grinders, ashaft mounted Y in Said chamber, a conveyor mounted on the JAMES F" VVINCHELL' shaft and within said chamber, a Wheel mounted on the shaft, and having spokes the sides of which are obliquely disposed to the axis of the \Vitnesses:

M. A. BALLrNGER, EDWIN L. BRADFoRD.

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