US495235A - Combination clay-mill - Google Patents

Description

Patented Apr. 11, 1893.

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O; W. VAUGHN. COMBINATION CLAY MILL.

(No Model.)

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O. W. VAUGHN. COMBINATION GL-AY MILL.

(No Model.)

Patented Apr; 11

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UNITED STATES PATENT OFFICE.

CALVIN W. VAUGHN, OF CUYAHOGA FALLS, OHIO.

COMBINATION CLAY-MILL.

SPECIFICATION forming part of Letters Patent No. 495,235, dated April 11, 1893.

Application filed January 3. 1893. SerialNo. 457.099- (No model.)

To all whom it may concern;

Be it known that I, CALVIN W. VAUGHN, a citizen of the United States, residing at Guyahoga Falls, in the county of Summit and State of Ohio, have invented a certain new and useful Improvement in Combination Clay-Mills, of which the following is a specification.

My invention has relation to improvements in that class of clay mills in which verticallyrevolving wheels travel in an annular bed, across which they are arranged to reciprocally move.

Heretofore it has been customary in mills of this class, to have the annular bed stationary, and the clay, after being ground, and the mill stopped, is removed by hand labor by workmen who enter the bed and shovel it out. This is objectionable for two reasons; First, because of the time required, and the expense incident thereto; and, second, because of the liability to injury to those engaged in removing the clay, from some additional starting of the grinding mechanism.

The object of my invention is, by a combination of parts,to produce a new and improved mill, in which the clay may be thoroughly ground and tempered, and from which it may belremoved by the operation of a part of the mi 1.

My invention, intended to overcome the above objections, consists in the peculiar and novel construction, arrangement and combination of parts hereinafter described and then specifically pointed out in the claim, reference being bad to the accompanying drawings, forming a part of this specification.

In the accompanying drawings, in which simllar reference-numerals indicate like parts in the different figures: Figure 1, is a vertical central section of my improved clay mill ,Fig. 2, a plan of the machine below the bed; and Figs. 3, and 4, end and side elevations, (enlarged,) respectively, of the rollers that support the annular bed.

Referring to the drawings, 1 is the annular bed, which consists of a disk 2, of cast iron and braced by radial webs on its under side, on which are mounted two concentric rims 3,- 4, between which is interposed-a false bottom 5, for the grinding wheels to run on. About the under face of the disk 2, and near its outer edge is an annular track 8, which rests and runs on rollers 9, journaled in suitable bearings, attached to the framework of the mill. These rollers support the bed, and are in form of truncated cones, their journals running in roller bearings (see Fig. 3), and the track 8, and rollers are beveled to conform to each other. In the center of the disk 2, is a hub, in which is fastened a depending shaft 6, the lower end of which runs freely in a box 7, mounted in the framework of the mill, the office of which box is to hold the lower end of the shaft centrally and prevent lateral movement.

Below the bed 1, on the shaft 6, is mounted and keyed a bevel gear wheel 10, which meshes in a smaller bevel gear 11, loosely mounted on a horizontal shaft 12. This bevel gear 11, extends backward, the rear portion constituting one member of the clutch, the other member 11', being fastened with a feather key to the shaft 12, and so arranged as to slide forward and,interlocking with the forward member, turn the wheel, and by it the wheel 10, and bed 1.

For the purpose of illustrating my invention, in so far as it relates to grinding wheels being driven around said bed, and their reciprocal movement across it, I have adopted the invention of W. G. Merrill, for which Letters Patent No. 218,760, were granted August 19, 1879, and to which patentreference is hereby made for details of construction not herein described.

In the center ofthe bed 1, is an upwardopeuing hub, in which rests the lower end of a shaft 13, its upper end being journaled in a suitable bearing 14, in the framework 15. The shaft 13, has an intermediate chamber or recess, above which it is tubular, and on the tubular part is mounted and fastened a spur wheel 16, which meshes in a smaller gear wheel 17, connected with one member of a clutch 18, loosely mounted on avertical shaft 19, the other member, 20, of said clutch, being keyed to said shaft. A horizontal shaft 21, passes through the chamber in the shaft 13, and on it are loosely mounted grindingwheels 22, having grooved hubs, which run in boxes in a frame 23, which frame serves to unite them and cause them to move in unison lengthwise of the shaft 21, and surrounds the shaft 13. Attached to the frame 23, is a cast ICQ ing 24, preferably for strength constructed in triangular shape, and having a vertical slot in which a wrist-pin 25, slides. The wristpin 25, is attached to a gear wheel 26, journaled in the chamber of the shaft 13, and moved by a pinion 27, operated by bevel gears 28, 29; the latter-being mounted on a shaft 30, which extends through the tubular part of the shaft 13, and is held against turning by a lock 31, attached to the framework.

I have adopted for the purpose of-illustrating the clutches, a device commonly known as the pan clutch, but I do not intend thereby to limit my invention to that or any other particular form of clutch, as any device that will subserve the purpose may be employed; nor do I intend, by the use of the Merrill mill hereinbefore mentioned, to prescribe that particular mechanism for operating and reciprocating the grinding wheels, as other mechanism effecting the same movements may be adopted.

The operation of my improved mill is as follows: The clutch which operates the motion of the bed is thrown out of gear; and the one operating the driving wheels thrown in gear, thereby causing said wheels to run in the bed and grind the material therein. When the clay has been ground, the wheels are stopped and the bed put in motion and a shovel 32, suspended by a flexible connection to the framework of the mill, (this part being only suggested in the drawings,) lowered into the revolving bed, with its edge opposite the motion of said bed, Where it encounters the ground clay, which, by its momentum and the pressure of that behind it passes up the shovel blade, and falls over the outside of the outer rim.

I make no claim to the shovel used in connection with the revolving bed, as I have already claimed the same in my application filed August 20, 1892, Serial No. 443,657, now pending in the Patent Office.

It has not been deemed necessary to show mechanism for actuating the clutches, as this is unimportant to my invention.

I am aware that the revolving bed is, of itself, not new, nor do I broadly claim it; but

hat I claim, and desire to secure by Letters Patent, is:

An improved clay mill embodying an annular bed, arranged to be revolved; vertically revolving wheels arranged to be driven around said bed, and to reciprocate across it, and mechanism, such substantially as described, for separately operating said bed and wheels, substantially as shown and described.

In testimony that I claim the above I hereunto set my hand.

CALVIN W. VAUGHN.

In presence of C. E. HUMPHREY, O. P. HUMPHREY.

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