US33064A - Spqtjjlibrg - Google Patents

Description

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I) HAWKINS, OF SAN FRANCISCO, CALIFORNIA, ASSIGNQR TO ALFRED TEABODY, OF SALEM,

. MASSACHUSETTS.

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Specif cation of Letters Patent No. 3 3,06}, dated August 13 1 861.

To all whom it may concern:

Be it known that I, L. D. HAWKINS, of San Francisco, California, have invented a new and Improved Machine for Cleaning Rice, Coffee, and other Grains and for Smutting Wheat, and that the following is a full and exact description of the same.

My invention consists in the use of a drum or cylinder, covered with strips of sheep skin with the wool onthem for cleaning rice and other grains, and with strips of sheet iron -or other. like substance for smutting wheat, revolving rapidly inside of a hollow cylinder composed of alternate perpendicu: lar stone blocks and'frames of wood or iron covered with wire cloth, adjusted and used as hereinafter set forth.

The grain to be cleaned is introduced into the machine at the top and passing down through the space between the drum and the.

outer cylinder it is thrown with great rapidity against the surface formed by the stones and the wire cloth, by which the grain is severely rubbed against the said surface so as to break and peel off the skin or hull which is on it, without pulverizing or break ing the grain itself, and at the same time the substance scraped or rubbed from the tion taken through the red lines 00 a: of'

Fig. 2. 7

Similar letters of reference where they ocour in the separate figures, denote like parts of the apparatus, in all the figures.

The base A of the machine, and the upper.

plate B, I propose to make of cast iron, and to unite them by hollow cast iron columns 0, through which rods (1, pass, and these rods may also pass through the floor of the building to hold all firmly together and to the floor. The chink pieces D, are of wood, and their inner sides next the drum are covered with sheep skin to prevent the wearing away of the wood, as well as to make a tight joint,

bed and top plate, that they may be set to, or.

from the cylinder, as may be required.

E, E, are stone segments radially arranged on the base and top plate, and F, F, are gauze screens also radially arranged upon said bed and top plate and interposed between the stone segments, so that the stone segments E, screens or screen frames F, and

chink pieces D, form the outer case of the machine.

G, is a shaft supported in the bridge trees H, I, at the top and bottom, and having upon its upper end a pulley J, around which the belt that is to drive it passes. Upon this shaft is placed a drum or cylinder K, the perimeter of which is covered with sheep skin Z), having the wool upon itor pelts, as they are termed. ering should be large enough to run in close proximity to the inner edges of the stone segments, screens, and chink pieces.

The stone segments E, at their lower ends rest in shoes L, and by means of a set screw 0,

these shoes, together with their stone segment may be moved to or from the cylinder K, to properly adjust their working surfaces to each other. And a set screw cl, which presses against the stone segments at their tops, holds them to the cylinder at thatpoint. For the purpose of removing or replacing the segments E, the shoe L, has a sliding cleat or ledge c which can be removed, and the segment will then slide out; and when this ledge is replaced it holds the segment to the shoe.

The screen frames F, are also adjustable; they rest at their base in shoes M, which can be moved toward or from thecylinder, by set screws f, and their tops are adjusted and held up to the cylinder by other set screws 9, which, like those (Z, above mentioned for adjusting the stone segments, pass through lugs it, h, said lugs being made removable, so that the segments, as well as the screen frames may be removed and replaced when required.

The outer case opposite to the screens F, as shown more distinctly in Fig. 1, is open so that the dust and other scourings from the grains may pass out of the case; and thus the alternate scouring or polishing surfaces of the stone segments, and intervening screens, make one operation as it were, of the This cylinder with its covhulling and polishing, and the separation of the impurities from the cleaned grains, and saves an after separation, as is now practiced.

To prepare this machine, especially for smutting wheat, I propose to use instead of the sheep skin covering, strips of metal, running up and down the cylinder, and at an angle sufficient to form a kind of conveyer to hurry the wheat through. But for rice, coffee, and such like grains, the construction above set forth is that which I design to use.

In the machine represented in the drawing there are four stones and four frames, but any number from two of each upward may be used, the number depending upon the size of the machine required.

I do not claim the revolving drum covered with sheep skins or other substances, nor the stones, nor the frames covered with wire cloth, as my invention; but

I claim as my invention and desire to secure by Letters Patent,

1. The combination of the stones E, E and wire cloth covered frames F, F, whereby the pulverized skin and dirt from the surface of the grain is thrown out, leaving the stones free to act on the grain, and whereby the action of a cleaner andpolisher are combined, thus in most cases doing away with the use of wire polishers as a supplementary process, and 'in all cases materially lightening the work to be done thereby.

2. The adjustment of the wire polisher frames to be moved up toward or drawn back 35 from the revolving drum simultaneously with the stones.

8. The use of the iron shoes or slides L, M, upon which the stones and frames are placed, in combination with the cast iron bed plate A, and the screws 0, f, whereby the size of the hollow cylinder composed of the stones and frames may be increased or lessened as desired.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

L. D. HAWKINS

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