US295764A

US295764A - rongerfoeb

Info

Publication number: US295764A
Authority: US
Publication date: 1884-03-25
Anticipated expiration: 1901-03-25

Description

(No Model.)

HUNGERFORD..

GRINDING MILL.

No. 295.764. Patented Mar. 25. 1884.

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` ASSIGNMENTS, TO THE UNITED Y' PAN-Y, OF NEV YORK, N. Y.

STATES COTTON SEED CLEANING COM- SPECIFICATION `forifniag part of Letters Patent No. 295'764, dated lVIarch 25, 1884. Application lcd September 15x 1881. (No model.)

To @ZZ whom t may concern:

n Be it known that I, HENRY H'UNGERFORD,

of Norwalk, in the county of Fairfield and State of Connecticut, have invented a new and useful Improvement in Grinding-Mills, of

which the following is a full, clear, and exact description.

My improvements relate lo cylinder andV concave mills for reducing grain and other ma 1o terials, and have the special object to save regrinding of the materials, as heretofore necessary in that classof mills.

In the drawings, Figure lis a verti cal transverse section of the improved mill. Fig. 2 is a horizontal section on line m x of Fig. l. Fig. 3 is a detail section showing the construction of the revolvinggrinder. Fig. 4. is ade- 'tail section showing one end of the stationary grinder, and Fig. 5 shows the. separate por- 2o tions or sections of which the grinders are formed.

A is the supporting-frame of the mill, covered by a curb, B, that supports a hopper, C, all of which parts may be of any suitable construction.

D is the revolving grinder on a shaft, a, that is sustained on frame A, and is to be driven by suitable power.

E is the fixed grinder, formed of platesec- 3o tions b, tied by a rod, c, and supported by orossbars d beneath. p

The revolving grinder D may be a roller or cylinder having a iiuted or ribbed surface; but I prefer the construction shown, in which a 3 5 hollow cylinder, e, is iixed on the shaft a., and rings f, of V form on their outer surfaces, are placed around the cylinder and clamped between end disks, g, by nuts le, that take on the hubs of cylinder e. These rings or sectionsf 4o are of steel, and their beveled surfaces are grooved to form cuttingledges.

The plates of which the stationary grinders E are formed are of V form on their ends contiguous to the grinder D, and the ends enter between the rings f; The platesare curved to extend from about the horizontal center line of `roller D to the under side of the roller, and I prefer that the space between the grinders D E should decrease from the upper to the lower or delivery point. The plates b are all alike, and are tied together by a rod, c, pass ing through said plates, and are clamped by nuts upon the ends of the said rod. This rod c passes through bearing-blocks a at its ends. These blocks rest in boxes, (shown in dotted lines in Figs. l and 2,) said boxes being of greater horizontal length than the blocks, so that the rod can be moved forward or back- 4 ward. Set screws l l serve to adjust the blocks and the rod, and to hold the grinder in proper position. The grinder E may turn slightly upon the shaft c, and the front or grindingV edge may be adjusted in relation to` the revolving grinder D by means of the setscrews m, which pass through hangers l, and bear against bars d, extending across underneath the plates b. By means of these` adjustingscrews the grinder E may be swung so as to regulate the space vbetween it and therevolving grinder, as may be desired. `The bars "d, one being behind and the other in front of the boltingrod c, serve to hold the grinder steadily in any position in which it may be set, and by the set-screws 'm the space between the grinding-surfaces above or below may be widened or narrowed at pleasure.

` Above the grinder E is fixed an inclined plate, p, that is shaped to lead the material to the grinders. Side plates, o, are also provided to conne the material at the ends of the roller D. By this construction I obtain an extent of grinding-surface equal to one-quarter the circumference of the revolving grinder, and sufficient to reduce the material at once without regrinding.'A There will be continual reduction fromthe pointwhere thematerial enters between the surfaces to the delivery at the under, side, and the extent of reduction can be varied by adjustment. Vith` materials that require to be coarsely ground or simply cracked, the stationary grinder will be formed of narrow plates.

The form and size of ribs on the revolving and stationary grinders may be varied, and the grooves or teeth also made in suitable form, according to the materials to be ground. Having thus described my invention, I claim as new and desire to secure by Letters Patent to the revolving grinder D, said grinding- 15 faces being adjustable vertically by means of set-screws m in the hangers Z, substantially as described.

3. In a grinding-mill, the Kconibinationof a revolving grinder, D, and the grinder E, conl- 2o posed of plates and tie-rod c, as described7 the said rod c having its bearings in adjustable blocks in the frame, substantially as described.

HENRY HUNGERFORD.

Vitnesses:

Gno. D. WALKER, C. SEDGWICK.