US81725A - Improved grinding-mill - Google Patents

Description

G. N.` ANNAN. GRINDING MILL.

No. 81,725. Patented Sept. 1, 1868.

[mW/mn UNITED] STATES rrrcn.

ATENT GEORGE N. ANNAN, OF BUFFALO, NEW YORK.

iMPROVEDGRiNDiNe-MILL.

To all whom t 'may concern:

Beit known that I, GEORGE N. ANNAN, of the city of Buffalo, county of Erie, and State of New York, have invented a certain new and useful Improvement in Grinding-Mills; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making part of this specification.

Figure 1 is a perspective view of my improved grinding-mill; Fig. 2, a vertical crosssection; Fig. 3, a view of theY grinding-cylinder and concave bed removed from place.

Like letters of reference indicate corresponding parts in all the figures.

My improvement belongs to thatclass known as portable mills, and the invention'relates principally to aniinproved mode of hanging and adjusting the concave bed nearer to or farther from the grinding-cylinder by pressing outward upon the journals and inward upon the body of said bed, as hereinafter set forth.

In the drawings, A indicates the casing, B the grinding-cylinder, and G'the concave bed, the cylinder and bed being situated horizon-- tally in the casing. The concave bed is lhung by journals a a. in oblong bearings b b of the casing. These journals are at the ends of the bed, and situated about midway ot' the width,

so as to produce a balance. A gainstthe journals a a rest sliding blocks c c, dovetailed or mortised loosely into the heads D D. of the cas ing, so as to press outward againstthe journals a a. by turning screws d d, as clearly shown in Fig. 1. Screws ff and g g, respectively above and below, pass through the side of the casing and bear upon the four corners of the bed, pressing inward or in the direction opposite'to blocks c c. By this arrangement of the blocks c pressing outward against the journals, and the screws f g pressing inward against the corners of the bed, I place the'whole bed perfectly under control and render it. adjustable to any desired place, `and at the same time hold it in a fixed position-v-an eect, so far as I know, neverbefore produced. The most essen tial feature is rendering the axis or journals adjustable in and out, whereby thev opening between the` cylinder and bed is adapted to grains of different sizes, and also to grinding of different degrees of Iineness. In connection with this outward adjustment of the journals the inward pressure of the screws upon the four corners is also essential `to prevent any rockin g action, and also to set the bed in any position desired, either` in or out, bodily, or one edge or one end to a greater degree than the other.

I am aware' that a concave bed has before been employed having journals at the upper edge, and a single adjusting-screw pressing centrally to set the bed up to the cylinder. In such case, however, the single set-screw allows a rocking and irregular motion, which impairs the eieiency of the machine. Such is not the equivalent of my arrangement, where the inward and outward action oppose each other, thereby holding every part firm. f

The cylinder and bed are provided with grinding-teeth It h, as shown. In order to prevent these teeth from coming in contact when set close together, I provide the ends of either the cylinder or the bed with plain rims i t', projecting alittle beyond the teeth, against which.the

.opposite part will strike before the teeth can engage. If desirable, these rims may be hardcned to prevent wear.-

Ribs k Icare made to project over the top of the cylinder and bed to prevent the grain from passing outside of those parts. The heads I) D of the casing are simplyrbolted fast, as shown iii-Fig. 1. At the top a notch is cut in each head, which fits over a lug, l, cast in the end of the casing. This and block c holding on journal a serve as a double lock to hold the head stationary in place, and without strain upon the screw-bolts. This mill is intended more especially for grinding feed for animals, in which case it is desirable to -produce only a coarse article. In order to remove the finer particles, I design placing the mill over a box having an incline sieve vor screen beneath, which will throw olf the coarser part, while the flue particles pass through. This meal thus made forms a tine material for family use, and

as it can be produced in smallquantities at will is always fresh.

I do not claim broadly an adjustable con cave bed in combination with a grinding-cylinder, for that is old; but

What I claim as my invention, andi-desire to secure by Letters Patent, is-

1. Thecombination of the blocks ce, pressing outward upon the journals of the bed, and the In witness whereof I have hereunto signed screws ff and g g, pressing inward upon the my name in the presence oi' two subscribingfour corners of the bed, thus opposing each witnesses.

other, the whole arranged als described, and

operating in the manner and for the nnmose GEO. X. ANNAN specified.

2. Connecting the heads D tothe ends-0f the Witnesses: case by the Iawo locks c I, in addition to the or- R. lF. OSGOOD, dinary screws, whereby the great strain is re- ALBERT Hiuen'r.

moved from the screws, :1s herein set forth.

Images