US22807A - Mill fob - Google Patents

Description

W. H. HOPE.

Grain Mill.

No. 22,807. Patented Feb. 1, 1859.

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Specification of Letters Patent No. 22,807, dated February 1, 1859.

To all whom it may concern:

Be it known that I, 7M. H. .Horn, of the city of Washington, District of Columbia,

have invented a new and useful portable mill for cutting, crushing, and grinding corn on the cob, grinding all kinds of grain into meal and flour, and grinding roots, herbs, bark, spices, plaster, 0yst er-shell, etc; and I do hereby declare the following to be a full and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon.

The object .of this invention is to obtain a cheap and durable portable mill that with a small power will be capable of doing all the grinding necessary for a large farm or plantation or neighborhood in regions of the country where water and other power is scarce.

The nature of this invention consists in making a triplicate mill, of cylinders running in concaves for the purpose of grinding different materials. Also in the mode of setting the stone and cylinders for the purpose of grinding coarse or fine as the case may require.

To enable others skilled in the art to make and use my invention, I will proceed to de scribe its construction and operation.

In the drawings, Figure 1 represents the exterior of the mill in perspective; Fig. 2 as used when grinding flour or corn meal, Fig. 3, as used when cutting, crushing and grinding corn on the cob or other matter, as food for cattle, etc. Fig. 4 shows the periphery of the running stone, and Fig. 5 the interior of the concave stone.

A is the frame stoutly made of some hard, durable wood, BB covers for the mill, with hopper h to be used when the corn cob crusher and cutter is not attached.

SS are hollow cast iron cylinders 10 inches in diameter with teeth running the whole length of the cylinder 2% or 3 inches long, l\-shaped, one inch thick at their base, running to a sharp edge, on cylinder S with a downward inclination, and on cylinder S" inclining upward. These teeth are so set as to fit in each other when required, and made long so as to be sharpened when dull. Cylinders SS are operated by cogs attached each at one end of each, or by a band I)" as shown in the drawings. These cylinders are at tached to a stout cast iron frame F and run in journal boxes, box I; is fastened firmly to E frame F, while box 6 is attached to the end of screw lever Z and moves on a stout plate for the purpose of cutting and crushing coarse or fine as may be desired. Frame F with cylinders SS, are arranged so as to be detached from frame A when the mill is not needed as a corn and cob crusher and cutter.

- On the bottom of the frame F are four iron pins which fit in plates fastened on top of frame A, said plates having holes in them to receive said pins. On frame A are two hooks (Z which fit over projections on frame F. Said pins and plates, and hooks and projections are used for the purpose of attaching frame F firmly to frame A when required. 8 is a hollow cylinder made of chilled cast iron, one foot (12 inches) in diameter and 16 inches, more or less, across, having teeth or corrugations V as represented in the drawings, said cylinder runs in a concave chilled cast iron plate 79, having teeth or corrugations similar to those on cylinder .9.

C is a perpendicular stone, made of bur mill stone, running in a concave C of same material. Stone 0 has indentations or V or U-shaped cuts or furrows, about four inches apart, and one inch wide, as shown on its periphery, said periphery being the grinding surface of stone orrunner C. An iron shaft runs through stone C fitting into 1novable journal boxes 0 at each end, said journal boxes are attached to screw levers Z, and move on iron ears, or lugs, attached to frame A, said journal boxes have slots near their base into which is fitted the ears or lugs. The screw levers Z regulate or set the stone for grinding fine or coarse. Concave C is made of bur mill stone and spans, within a fraction, one-half the running stone C, this concave is one inch wider than the runner, and six inches more or less through. The concave O at its upper end is 1%; inches thinner, than elsewhere, tapering down some 6 inches, it has on it, at its upper end, from three to five indentations or furrows, similar to those on the runner C. On each side of the concave is a stout board of hard wood, shown by dots, said boards are bolted to the concave, said concave C is held in its place by two stout iron rods fitted in it, and held to the casing by cars or lugs r, the concave is made thus movable so that it may be easily taken out when it is necessary to sharpen the stones or repair the mill.

In the outer casing 0, is a door 9 for the admission of a spout or chute w, which spout or chute is fastened to the bottom of the cast iron concave plate p, when the stones are not in use for the purpose of running out of the mill the material ground by the cutters, crushers, iron cylinder and concave, 'w is a spout at the bottom of the mill for the egress of the ground grain.

On to the ends of the shafts of cylinder 8 and stone C are pulleys, for the band which connects and operates said cylinder and stone, also pulleys for driving the same.

The speed of the stone O should be about 450 or 500 revolutions per minute. The speed is regulated by the size of the cog wheels and pulleys. The runner, or perpendicular stone O is two feet in diameter and from 10 to 12 inches thick.

The whole of the grinding apparatus is inclosed in a stout casing 0 as shown in F 1.

The main shaft is 4 feet long (made of wrought or cast iron), on which the run ning stone rests, said stone being placed 6 inches from one end of the shaft, the pulleys by which the power is applied, is on the other end of the shaft and 3 inches less in diameter than the stone, O.

Levers Z, which are used for setting the stone and cylinders, are fastened at one end to the journal boxes in which the shafts run, said journal boxes have grooves on their sides, near the bottom, into which the ears or lugs of the boX fastened on frame A fit, the journal boxes moving on said lugs or ears. On the other end of levers Z are stout screw threads fitting in female screws 2, said female screws have flanges on their outer edge, which flanges fit in a plate fastened to frame A, which plates firmly hold the female screws, the said female screws have pins or handles firmly attached to them for the purpose of moving them, and thereby regulating the stone C and cylinders SS. Near the journal boxes are thumb screws 3 for the purpose of holding levers Z when the stones are set. f is a slide for the purpose of regulating the feed from the hopper h when the mill is used for grinding flour or corn meal.

w a; w x are driving pulleys for giving motion to the stone and cylinders.

Operation: In operating this mill, when used for crushing, cutting and grinding corn on the cob, frame F, with cylinders SS, is attached to the main frame A, chute or spout 'w is placed as shown in the drawings, the corn on the cob is thrown into the hopper h and the corn and cob, cut, crushed, and ground up together. When the mill is needed for grinding such substances as coffee, spices, roots, herbs and food for cattle, the frame F is removed, chute to left in place, covers B B closed over the mill and the material to be ground thrown in hopper it. The cylinders SS may remain, or be removed, in using the mill for any kind of grinding, at the will of the operator. When the mill is used for grinding corn and wheat into fiour and meal, chute or spout w is removed, door g closed, the corn, or Wheat thrown into hopper it, which falls on cylinder 8 where the grain is cracked, or partly ground, and passes on to stone C, where it is ground into any quality of flour, or meal at the will of the operator. When the mill is not used for grinding flour or fine corn meal, the stone or runner O is ungeared and remains stationary.

hat I claim and desire to secure by Letters Patent is 1. The combination 'of a cylindrical corn and cob cutter and crusher, for grinding food for cattle, with two sets of grinding surfaces, arranged and operating substantially as and for the purposes set forth.

2. I claim the arrangement by which the cylindrical rollers, or cutters and crushers.

and grinding surfaces, may be operated together, or separately, and for the purposes set forth and described.

3. The mode of regulating the cylinders and stone, for the purpose of grinding coarse or fine, by the use of the screw lever Z, attached to the journal boxes 6, which move on ears or lugs firmly attached to frame F, in the manner described and specified.

WM. H. HOPE.

Witnesses:

LE FLOCHE, SAUBER SOHMIDT.

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