US503259A - John t - Google Patents

Description

(No mo e J T. TULLIS'. COTTON SEE D GRINDER ,259. Patented Aug 15,1893.

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UNITED STATES PATENT OFFICE.

JOHN T. TULLIS, OF CHIP, ARKANSAS, ASSIGNOR or ONE-HALE TO JOHN BURRESS, or SAME PLACE.

COTTOIfl-SEED GRINDER.

SPECIFICATION forming part of Letters Patent No. 503,259, dated August 15, 1893.

Application filed October 28, 1892'.

To all whom it may concern.-

Be it known that I, JOHN T. TULLIs, a citizen of the United States, residing at Chip, in the county of Union and State of Arkansas, have invented a new and useful Cotton-Seed Grinder, of which the following is a specification.

My invention relates to improvements in machines for grinding cotton seed, grain, feed, &e., and the objects in view are to provide a device embodying simplicity of construction and operation, thereby enabling the machine to be cheaply manufactured, and providing for durability and efiectiveness of operation; and furthermore, my object is to provide means whereby the rotary grinder may yield considerably to the pressure between the grinders without disarranging the parts or allowing the escape of the seed orgrain; and furthermore, my object is to provide means for allowinga yielding pressure of the revoluble grinder without extending the spindle of the latter through the space between the grinders.

Further objects and advantages of my invention will appear in the following description and the novel features thereof will be particularly pointed out in the appended claims.

In the drawings; Figure l is a perspectiveview of a machine embodying my invention. Fig. 2 is a central longitudinal section of the same. Fig. 3 is a face view of the stationary grinder.

A represents the frame-work .of the machine, which is preferably made of wood, but may be cast, the same being approximately rectangular in form and comprising the sidebars, a a, and the end-bars, a a, and having an intermediate cross-bar, a", parallel with the end-bars.

Arranged adjacent to one of the end-bars is the stationary grinder, B, provided with the usual interior grinding face and having a forward projecting peripheral flange or shell, 0. This flange or shell is cutaway or recessed at the top to form an opening 0, with which the superimposed hopper communicates, and is similarly recessed or cut away at the bottom to provide an outlet 0'. In bearings in the op- Serial N0.450.212. No model.)

posite sides of the hopper, D, is mounted the agitator-shaft, E, carrying the agitator-arms, e e, and the beltv pulley, F.

G represents the rotary grinder, coextensive with the stationary grinder and normally held in contact with the free edge of the peripheral flange or shell thereof, this grinder, G, being provided upon its inner face with a reduced core, or cheek, H, which is equal in diameter with the interior of the flange or shell and fits therein, so that its surface is brought close to the surface of the Stationary grinder when the shoulder, h, which is formed between the body of the grinder and its reduced core or cheek, is in contact with the free edge of the flange or shell.

The horizontal spindle, K, which is attached at one end to the center of the rotary grinder is mounted in bearings upon the intermediate cross-bar and the end-bar of the frame whereby the grinder is held to its place without the necessity of passing the spindle through the grinders. The front end of the spindle, namely, that end which is remote from the grinder, is fitted in a box, L,in which is arranged a pressure spring, M, whereby the shaft is normally pressed rearward and the rotary grinder is held firmly in contact with the material which is being ground. The spindle carries a belt pulley, N.

The faces of the grinders of stones are roughened or broken in the usual and wellknown manner, and that of the stationary grinder or stone is recessed radially, above and below its center, as shown at b 17.

From the above description taken in connection with the drawings it will be evident that the construction of my improved grinding machine is simple and direct, and it will also be not-iced that by reason of the ofi-set or reduced core or cheek with which the inner surface of the rotary grinder is provided the latter may be repressed, against the tension of the pressure spring, a considerable distance without displacing any of the parts of the mechanism or exposing the grinding surface, which is formed upon said ofi-set, core or check.

It willbe understood that the radial recesses 12 and b which respectively serve as an inlet mo and an outlet for the grain or seed, may be made of any desired length to suit the material and the purpose for which the device is designed. In the drawings, Figs. 2 and 3, I have shown such recesses extending to within a short distance of the center of the stationary grinder or stone, thus being suitable for grain which is sufficiently large to prevent its passage across the intervening portion of the stone between the inlet recess and the outlet recess, but in practice, the inlet recess may be made as much shorter than the radius of the grinder as may be found desirable.

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

1.v In a machine of the class described, the

combination with a stationary grinder, of a f peripheral flange or shell fixed to the stationary grinder, a rotary grinder adapted to bear against the free edge of said flange or shell and provided with a reduced core or cheek to fit within the flange or shell and carrying the opposite grinding surface, and a spindle cari rying the rotary grinder and fixed to the outer side thereof whereby the grinding surfaces are unbroken, substantially as specified.

2. In a machine of the class described, the combination with the frame-work, of the stationary grinder provided with a forward projecting peripheral flange or shell, the super- 5 imposed hopper communicating with an open- ;ing in said flange or shell, the rotary grinder provided with a reduced core or cheek to fit y within said flange or shell and havinga shoulid'er, h. to bear against the edge of the same, the spindle attached to and terminating in the center of the rotary grinder, whereby the l grinding surfaces are unbroken, and the pressure spring engaging the spindle to press the rotary grinder toward the stationary grinder, substantially as specified.

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

JOHN T. TULLIS.

Witnesses:

Y. F. Goonwm,

STERLING S. LACY.

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