USRE4135E - Improvement in mill-stone dress - Google Patents

Description

J. SEDGBEER.

Millstone Dress. 4 v

I Reissued Sept. 27, 1870;

1 \We mm m cally on each side,v

- idnitrd swag 13mm epic.

JOSEPH SEDGEBEER, OF PAIVNESVILLE, OHIO Letters Patent No. 35,858, dated July 8,- 1862 reissue No. 4,135, dated September 27, 1870.

IMPROVEMENT IN MILL-STONE DRESS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it known that I, J osnrrr Snnennnnn, of Painesville, in the county of Lake and State ofOhio, have invented a newand useful Improvement in Dress for Grinding-Mills; and I hereby declare that the following is a full, the'same, reference being had to the accompanying drawing and letters of reference marked thereon forming a part of thisspecification.

My invention has-relation to the dress of. mill,- stoneswith cast-iron grindingsnrl'ace's and It consists in the construction and novel arrangement of the projections or teeth, whereby two important objects aredesigned to be attained. First, the teeth are hollowed out centrally, with the object'ot' keeping the flour or meal cool.

Second, the teeth are provided with cutting-edges arranged obliquely to each other and to the radii of the mill-stone, in such a manner as to form radial zigzag channels, designed to serve an efiicient purpose in the partial retention of the flour or meal under the superior shear-like grindingaction of the oblique cutting-edges.

'In the accompanying drawing Figure l is avertical central section, showing the lower plate asrevolving, and the upper one as stationary.

Figure 2 represents a plan view of a portion: of the face of the lower plate, the upper one being precisely simi'lan.

Like letters of reference designate like partsthronghout the drawing. v

'The letter A represents the lower grinding-plate.

B designates the upper plate, and a the ,shaft.

0- desi'gnates-the place where the grain is fed into the stones.

Toward the eye of the plates the grinding-surfitces curve upward in a conical form.

eferring' to fig. 2 of the drawing, it will-be seen that the teeth of my dress consist of a series of laterally-indented projections, arranged radially around the outer portion of each-plate extending from the periphery to about midway of the distance from the periphery to the eye.

Theseradial teeth are usually indented symmetriand between every two indentationsan angular point, 0, extends out laterally, which is provided with cutting-edges b b, arranged oblique to the radial lines of the plate.

Each radial indented projection is continuous, and

clear, and exact description of its lateral salientaud re-entering angles respectively correspond with those of the adjacent teeth, thus forming continuous zigzag passages 11, which have an important elfect in retaining the flour or meal under the action of the cutting-edges.

Also, the salients and re-enteri'ngangles on each side of the radial projections are usually symmetricall y arranged in sucha manner as to give a succession of broad faces between the salients which are hollowed out, asshowu at z, and serve as a means of partial communication between the zigzag channels cl. and to keep the flour or meal cool.

- From the termination of these radial indented projections to the eye of the plate, larger teeth are usually arranged in line with every alternate line of indenrations, as above described, and separate therefrom, as. at e, or connected thereto, as at it.

These teeth are provided with the same arrangement of oblique cutting-edges above described, and are hollowed out centrally likewise.- Their object is to perform the coarser operation of breaking up the. and they are grairras it is first fed into the hopper, made strong and 'large for this purpose. channels between them are-wider also, the passage of the coarser particles of broken up in this part of the mill.

The advantages of my dress are.- I

First, the gradual and effectual manner in which the grain is cut and ground, and worked out toward the periphery, as flour or, meal; and

Secondly, the means by which the grain is kept cool during the grinding operation.

Having thus described my invention,

That I claim, and desire to secure by Letters Patout, is-

1. In a dress for grinding-plates, radial lines of hollow teeth, having points 0 and cutting-edges b oblique to the radii of the plate, and so arranged as to provide continuous radial zigzag channels forthe passage of the grain, substantially as specified.

2. In a dress for grinding-plates, the continuous The zigzag to admit of the grain zigzag channels (I, bounded by cutting-edges b, ob-

lique to the radii of the as specified. r

In testimony that I claim the above, I have here unto subscribed my name in the presence of two witnesses. i

Witnesses: JOSEPH SEDGEBE'ER.

Ormntns KENXON, D. D. KANE.

grinding-plate, substantially

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