US117668A - Improvement in grinding-mills - Google Patents

Description

UNITED STATES *PATENT QFFICE.

I ADDISON H. NORDYKQE AND DANIEL W. MARMON, OF RICHMOND, INDIANA.

IMPROVEMENT IN` GR`INDINGMILLS.

Specification forming part of Letters PatentNo. 117,668, dated August l, 1871.

To all whom it may concern:

Be it known that we, ADDISON H. NoRDvKE and DANIEL W. MARMON, of Richmond, in the county of Wayne and State of Indiana, have invented certain Improvements in Grinding-Mills; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the annexed drawing making a part of this specification, in which- Figure 1 is a vertical central sectioii of our improved mill, showing the frame upon which the mill rests, the stationary stone, th e rotating or running stone, the shaft and driving-pulley, and the hopper and spout for conducting the grain to the stones. Fig. 2 is an elevation, partly in section, showing the grooves or channels .formed in the revolving stone, the means for adjusting the dis tance between the stones, and the arrangement of the feeding-shoe. Figure 3 is a plan view of a portion of the frame and of the cases which surround the stones, and also of the means for adjusting the stationary stone. Figure 4 is an elevation of the arm and standard which, carries and oscillates the feeding-shoe. Figure 5 is a plan view of a portion of the feeding-shoe.

Corresponding letters refer to corresponding parts in the several f1 gures.

This invention relates to that class of mills which is designed for grinding grain and other similar substances; and it consists in the construction, combination, and arrangement of some of the parts of which it is composed, as will be more fully explained hereinafter.

In constructing mills of this class a suitable frame, A A, of wood or metal, is provided, which is to be of sufficient strength and dimensions to support the parts of the mill; and upon the top of this frame there is placed a frame, A1, which extends around upon three sides of the upper end of frame A, and may be bolted or otherwise afiixed thereto. This last-named frame may coustitute a portion of the frame A, by being framed into it or by being bolted to the upper ends of its posts; or it may consist of a separate frame of metal and be bolted thereto; but in any case it is to be furnished with a cross-bar, between the driving-pulley and the revolving stone, upon which to cast or otherwise secure boxes for the journal of the shaft which carries the revolving stone to run in. Upon the top of frame A there is erected another frame, A2 A2, which is for the purpose of supporting the hopper A3 iu which the grain to be ground is placed. This hopper is furnished with the usual slide or valve for regulating the discharge of grain or other substance therefrom 5 and below it is placed a feeding-shoe, A4, which has imparted to it an oscillating movement-by a device soon to be describedand has its outer end supported upon a rope or strap which passes over a regulating-pulley, in order th at the feeding of the grain to the stones may be easily regulated. In order that the requisite oscillatory movement may be given to the feeding-shoe a vertical shaft, B, is passed through the rear end of the shoe, and has formed upon it a cross-arm or arms, which form journals for boxes placed upon the under side of the shoe to rest upon. The vertical portion of this shaft extends down to and rests in a socket formed upon the frame A, but just above which point there is an arm which extends to some point uponthe shaft which carries the running stone, and upon which there is formed a cam-shaped projection, which, as it comes in contact with the arm B', will move it so as to give to the cross-arm upon the upper end of the shaft B an oscillatory movement, which will be imparted to the feedingshoe. `In order that the grain after it has been delivered to the stones may be properly ground, a horizontal shaft, O, is provided, and placed in the boxes carried upon the frame A1. Upon the inner end of this shaft there is secured a grinding-stone, O1, of any approved form and material, around which an iron band is placed, which has upon its perimeter a series of projections, c c a, for can rying the meal or flour to the discharge-aperture in the case which surrounds the stone; which case is to be made of wood or iron, and to be adjustable, if desired, it being so constructed as to inclose the running stone entirely, and to be attached to a similar one which surrounds the stationary one, and thus form a tight case for both, so that no meal or flour can escape between them when the mill is running. This stone has formed in its face, which is in a vertical position, a series of grooves or channels, in the usual or any approved form; and in consequence of its arrangement upon the shaft C it is not permitted to have any longitudinal movement, the outer end of said shaft being provided with a steel step, in or upon which it rotates, as shown in Fig. l of the drawing. The stationary stone C2 is placed upon the Y as a very impertantfeature, as itY frequently Yhap- Y D1 D1, which have upon their outer ends screwmovement of the pin or coekhead as will allow same horizontal plane as is the revolving one, it being incased as above described, and provided with projections upon its outer surface or upon its inclosin g-case, which projections have formed in them grooves which move upon guide-ways formed upon or attached to the frame of the mill. These slots are to be so formed-either by having their inner surfaces rounded or in any other convenient mannerthat as the stationary or non-revolving stone is moved toward the revolving one it may be made to present its face thereto at any desired angle to its axis, so that the distance between the faces of the two shall be the same over their entire surfaces. rlhis is regarded pens that in putting up the mills the axis of the revolving stone is not exactly in line with that of thenon-revolving one, and if it should be the strain of the belt which drives it will in time wear the boxes to such an extent as to change the alignment, and thus make it necessary to change the position ofthe stationary stone to correspond with that ofthe revolving one, which can easily be done with our arrangement of devices, which we will new proceed to describe.

To effect the necessary adjustment of the stationary or non-revolving stone a cross-bar, D, is attached to the frame by means of bolts or studs threads for the reception of nuts, or of one nut anda hand-wheel with a screw-thread formed in it. In the center' of the cross-bar there is placed a stud or other point which bears upon or rests in a cavity formed in the stationary stone or its case in such a manner as to permit the face of such stone to accommodate itself to the face of the runner-stone.

To facilitate the change of the position ofthe stone in a vertical line drawn across its face, as well as in a horizontal line, the inner end of the pin or cock-head which passes through the crossbar is held in a metal collar, which rests upon a rubber or other spring which is placed between it and the cross-bar, such spring allowing such a the stationary stone to recede a short distance from the other should any hard substance get between the stones when in operation, and at the same time will cause the stationary stone to assume its proper position with reference to the revolving one and insure the parallelism of their faces. This spring is compressed to such an extent by a nut on the end of the cock-head pin a-nd on the outside of the cross-bar as will prevent the stone from receding from the runner when grindthe nut, the cock-head pin can be made to yield s to a greater or lesser pressure ofthe stone as may be required in grinding substances varying in hardness.

It will be observed that in passing between the stones the grain enters through an aperture formed'in the center of theY 5stationary one, at*Y which point it is first brought in contact with the one which is revolving.

These mills are equally useful and applicable for grinding drugs, minerals, &c.

What we claim as our invention, and desire to secure by Letters Patent, is-

l. In combination with the stationary or nonrevolving stone of a grinding-mill, an oscillating cross-bar and cock-head, whereby the face of such stone may be set and kept parallel with that of the revolving one, substantially as and for the purpose set forth.

2. The combination and arrangement of the crossbar, the pin or cock-head which passes through its center, the spring` which surrounds and holds said pin, and the stationary stone of a grinding-mill, it being substantially as and for the purpose set forth.

3. The cross-bar D, constructed with an aperture for the reception of the oscillating cock-head and with a socket for the spring.

4. rIhe arrangement herein shown of the shaft C, the vertical shaft B, and the shoe A4, the parts being constructed as and for the purpose set forth.

5. The cock-head pin, the spring which encircles it, the cross-head D, and the nut for regulatin g the stiffness of the spring7 in combination with the stationary or non-revolving stone of a grinding-mill, the parts being constructed and arranged substantially as 'and for the purpose set forth.

In testimony whereof wehave signed our nam es to this speciiication in the presence of two subscribing witnesses.

ADDISON H. NORDYKE. DANIEL W. MARMON.

Witnesses JAMns SPnnn, CHARLES A. NORDYKE.

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