US647757A - Flour-mill. - Google Patents

Description

Patented Apr. [7, I900.

0. M. MORSE.

FLOUR MILL.

(Application filed Dec. 14, 1898.)

(No Model.)

I 212m 7 in able disk.

of one of the grinding-disks.

NITED STATES PATENT OFFICE.

onviLLn M. MORSE, or Jackson, MIornGAn;

FLOUR-MILL.

srncIFIoATIoN forming part of Letters ratent No. 647,757, dated April 17, 19cc.

Application filed December 14, 1898.

To all whom it may concern:

Be it known that I, ORVILLE M. MORSE, a citizen of the United States, residing at Jackson, in the county of Jackson and State of Michigan, have invented certain newand useful Improvements in Flour-Mills,'of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to a machine for grinding middlings; and it consists, essentially, in a machine embodying narrow smooth grinding surfaces upon opposite grinding members arranged in grinding relation to each other, with power-feeding devices for forcing the material through between said grindingfaces to thereby subject them to an abrasive action and disintegrate or grind them.

The invention further consists in the construction, arrangement, and combination of the various'parts, as hereinafter setforth.

In the drawings, Figure l is a vertical central section through a grinding-mill embodying my invention. Fig. 2 is a top plan view with parts broken away on one side to show the lower disk. Fig. 3 is an enlarged section through the grinding-faces of the grindingdisks. Fig. 4 is a sectional perspective view The mill preferably comprises two grinding-disks A and B. These disks are soarranged or combined with actuating mechanism that there is produced a relative rotary movement between the two'-that is, one disk stands still and the other moves, as shown in the drawings in this case-or the two disks move in opposite directions, or the two disks move in the same direction with different speed.

What I consider the simplest and, as far as I now know, the most efficacious plan is to have one disk stationary and the other a mov- In this case I have shown the disk B as the driven disk and the disk A as the, stationary disk. To this end the disk B is supported upon a shaft 0, which at its lower end is supported in the stepped bearingD and may be adjustable vertically by means of an adjusting-screw E.- The shaft 0 is driven by any suitable gearing, such as that shown in the drawings. The bearing D is supported in the cross-head or spider F, which at its end is supported on the standards G. In this case Serial No. 699,225. (No model.) A

I have shown three standards, and the crosshead F has three arms, one extending to each standard. I

H is a second cross-bar or spider, which is provided with a suitable central bearing for the shaft 0 and is supported by the sleeves I, resting upon the spider E. I

Within the sleeves I are the posts or standards J, their lower ends preferably resting in sockets in the standards G and held therein, as by the set-screws K. These standards at their upper ends are connected by the bridgetree L, and beneath this bridge-tree is .a hopper M, which rests upon the upper disk A, which isring-shaped, the hopper leading into the eye of the upper disk A and resting upon the upper edge of the disk, as plainly shown in the drawings.

The disk A on its edge is provided with the apertured ears 0, which engage upon posts or stands J and have a free sliding movement thereon. bar or head II are springs P, of sufficient length and tension to normally support the disk A out of contact with the disk B.

The disk A may be adjusted down toward the disk B by compressing the springs P, and this is done, preferably, by means of a screw Q, passing through a screw-threaded bearing in the bridge-tree L and bearing upon abridge or cross-bar R in the middle of the hopper. Thus the upward strain upon thedisk A is carried by the bridge-tree to the standards J. Above the bridge tree upon the standards J are cushions S, either rubber or other elastic material, and these cushions I show as held in place by means of the washer S and the screw S From this description it will be seen that the disk A is held in grinding relation to the disk 13 by a holding device which makes an elastic cushion, so that if undue power should be exerted upward upon the disk A it might rise by compressing one or more of the cushions S. Thus if a nail or other hard substance Between these ears and thecross would rise sufficiently at the point where the 'nail was fed through to allow it to pass without damage to the disks.

Below the disk B is a chamber S formed by the board or plate U, and a skirt T, around the edge of the board U, rising to the disk A in contactwith a' fiange a) thereon this chamber i'sja.dischargespout'V.

.- W isafeedsp u-twhich leads into the top- I of the hopper.

The two: disks are so shaped asto forjmibe tweenthema feed-cavity X. This feed-cav'- ity is preferably of some considerable size, and the material is fed from the hopper thereinto.- This feed-cavity preferably narrows or contracts toward the periphery, and-near, the outer edge are the wings or ribs (1-, which.

extend to: a point near the periphery of; the,

disks and which are arranged at asharp l yfat b inFig. 2.

acute angle to the edge of the disk, as-plaiuly 1 shown in Fig. 2. Each of the dis-ks is provided with similar ribs, except that the ribs I in the one disk are oppositely arranged to those in the other, as shown in 'dottedlines At the outer edge of eachdisk are'th'e smooth curved grinding-surfaces 10,] the curve of these surfaces beingarrangedso that the nearest point of approachof the sur-* disks, as shown in the drawings. 1 35.

faces of the two disks is near-theouter edge. TheseYopposite-curved smoothgrindin g-faeesa .Iprefera'bly form .the same as two meeting faces oflgrinding-rolls, and to makethisplain I have dotted in, in Fig. 3, the circles of'whicjh these faces are segments. I. do notdeem it essential that these curved surfacesshal-l'be segments of a true circle; but I deemit desirable that they should be-curved-surfaces and should approach each other gradually from the inside toward the outside of the In the operation of'this machine; which in;

this case isshown especially designed to work uponmiddling's, the material is fed into the hopper 'M, and-from thence will find its way,

either by centrifugal'a'ction .or by gravity lor Y by other means, into the path of the ribs a ,j

when by'the action of the ribs upon their-op posing fdisks ,thematerial will be positively fed outward through the restricted space beg tween therounded smooth'marginal grinding-vfaces. The ,efiect of this is twofold. 1, Thereisa grindin' g eifect, due to the forcing of the'm aterial between the two smooth surfaces radially, which, in etfect, is'substantially the 1 same aspassing'the material througha pair] 'ofgrinding-rolls and added to this efie'ct is.

; theabrasiveaction due to the rotation .of one disk upon the other, this abrasive actiontak- 1.

ingefiect at an angle to the radial path :of

' the-material. In other words, there .is a" eitectgofthis is to break up the larger .bitspf crushing actionpradially and an abrasivea'c-1 tion-transverselyto the crushingaction. The

,, flour-making material in the middlings with l out compactingit or'flattening it, as'is done:

2 are-used; It also seems to separate the in} I dividual particles or cells from one another to [a considerable degree where therolls alone 1 without breaking them into fragmentsonim-H palpable powder, whichdeteriorates the qua-l- I ityof the flour.

'I {find from actual experiment and use that notlonly'do I obtain from this mill a much. larger percentage of .the flour froin the middli'ngs at each reduction than by the use of the-rolls alone, but I also obtain a better grade of flour, leaving the middlings in better shape for further treatment and reduction, becauseiofnot-being compacted, which,

as previously explained',is done to a more or ilessdegree where, the roll action alone 1s used.

7' It will be seen that the construction which Iremploy is exceedingly simple and easy to manufacture. The adjustment of the disks one tothe other maybe 'accomplishedby turning either :the'screw E 'or thescrew Q, and the very finest adjustment between the two grinding-faces may-thus beobtaiued. 'Itwi'll :be observed. that'my mill does not belongto that class of ,feed -mills having corrugated disks, with thecorrugations extending-to the 'periphery thereof, .the grindinglbeing effect- .ed by -the corrugations or teeth in .th'edisks,

dine fis f ngerte ted solely by the s ight angle jatwhich these grooves are arsurfaces. 1

middlings. It has been found usetul'ingrindng th s o k-f ins a ce, say, t e fifth reduction' .after it comes from the rolls in a more .jor less flattened condition. The result of vpassing it through my mach-inefis to ,dis- I integrate it and separate the-icells so that it "bolts much freer. Itisobvious fro1 n th-i s that the grinding-facesin;.rnymaehinemust be arranged in substantiallythe sa'me relation to,

each .otheras are the grinding-facesof the, or-

dinary.grindingrolls thatis,}p.ra'ctical1y in .contact-.so' that whatever materialis torced throughthem wi-llbe abraded. It-isalso necessary that these faces should :be held together with snfficientlpowerto preventthe force-feed device'sfrom unduly separating, so'as toallow the material togo through withoutthe proper abrasive action. This arranging the grinding faces in the relation.,described is what I call thatlis, so #near togetherthatthe middlings l lcannot drift through, but must be forced through by power-feed devices, and will be abraded while thus on the grinding-faces.

I amawarethat there has beena millstone dress in which there was a plain margin; but in such dress thematerial was groundof ne- --ces sity.before it reached-such plain margin to such. a size that itwould drift or pass through.

this plain margin without abrasion if it had been ground to the desired size'bythe machine,-

v V V too My device isflintended'for usein'grinding 64'i',757 V I s essential, as experiments show that they may be arranged in a vertical plane.

hat I claim as my invention is- 1. In a grinding-mill, the combination of two grinding members having a cavity between them and grinding-surfaces at the points of nearest approach,means for eii'ecting a relative movement between the grindingsurfaces, and means arranged out of grinding position for positively forcing the material between the grinding-surfaces directly from the cavity. A

2. In a mill for grinding middlin gs and like stock, the combination of two grindingrings having a cavity between,a smooth, restricted, grinding-surface at the point of nearest approach of said rings, and force-feed or conducting-wings,in the cavity, the approximate faces of said wings being on planes separated farther than the grinding-faces.

3. In a mill for grinding middlings and like stock,the combination of two disks,oppositely arranged,and having a feed-cavity between, marginal, restricted grinding-faces on said disks, and feed-wings on the opposing faces of said disks, oppositely inclined, said wings being arranged substantially tangential to a circle drawn around their inner ends, and said wings being out of grinding relation,substan- -tially as described.

4. The combination of two relatively-revoluble grinding-rings dished upon their opposing faces and formed with a smooth grinding margin at their point of nearest approach, and having force-feed or conducting-wings upon the dished portion of said faces, the uper ed es of said win s, bein in lanes re- D a. b

spectively below and above the planes of said grinding-margins so that they do not come into as close proximity to each other as do said grinding-margins.

In testimony whereof I affix my signature in presence of two witnesses.

ORVILLE 1n. MORSE. Witnesses:

JAMES WHITTEMORE, M. B. ODOGHERTY.

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