US25965A - Bran-duster - Google Patents

Description

HALL.

Bran Duster.

Patented Nov. 1, 1859.

Inventar.' M. W!!

Witnesses:

WILLIAM I-IALL, OF ST. LOUIS, MISSOURI.

ERAN-DUSTER.

Speccation of Letters Patent No. 25,965, dated November 1, 1859.

To all whom 'it may concern:

Be it known that I, VILLIAM. HALL, of the city and county of St. Louis and St-ate of Missouri, have invented a new and Improved Bran-Duster; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawing, making part of this specication, in which- Figure l is a horizontal section, through the said machine, Fig. 2 is a vertical section, and Figs. 3 and 1l are parts of the machine to be hereinafter explained.

My invention consists in constructing a machine for separating the flour from the bran, more perfectly than it has hitherto been, and with less cost, by abstracting the flour all out of the bran, and with less wear' on the machine.

To enable others skilled in the arts to which my invention appertains to make and use the same, I will proceed to describe the construction and operation thereof. n

Similar letters of reference represent corresponding parts of the different figures of the annexed drawing.

A A is the frame of the machine, across the bottom of which a cast iron beam E is fixed, and into this beam a step is made to receive a journal boX C to support the vertical shaft D and across the upper part of the frame a similar beam F is fixed, into which a journal box I is introduced to support the upper end of the shaft D. Upon this vertical shaft there are two flanges fixed (Z) which have arms L radiating from their centers, eight in number, and upon the end of each of these arms, a brush is fixed as at P. To each of the brushes P a fan K is fixed, in the position shown. Near the upper end of the shaft D a third flange is fixed which has four arms t, projecting from its center, and over these arms, and near their center a rim of considerable dept-h is raised, as shown at M. This rim is cast upon the upper side of the arms, and so as to leave an open space between each of the said arms and the rim, as shown at II, Figs. l and 4. This vertical shaft D with its brushes and fans, `is incased in a cylinder composed of a series of ribs It, and which is lined with fine wire sheeting or gauze, as at a. The upper and lower ends of this cylinder, consist of semicircular segments, which are bolted together and into which the ribs R are secured. The upper end of this said cylinder is supported by means of a cast iron plate, shown at c, Figs. 2 and' 3, which has a flange, around its inside diameter, which fits in the ring Q Q, composed of the two semicircular segments, above described. rIhe lower end of the cylinder, aforesaid rests upon a cast iron plate B which has a flange upon its face to receive it, as shown at U U. In the periphery of the plate Q' cogs are cut, into which the pinion c meshes whereby the said cylinder is made to revolve.

IV is a plate made, of either wood or metal, and with the center bored out, just large enough to fit over the rim M, and so as to lap upon the plate C as at f Figs. 2 and 3, to which it is secured, thus closing the whole upper end of the cylinder, save so much of it as is comprised within the rim M. Over this rim, (which might be termed a nozzle,) a pair of slides are placed, one, on each side of the shaft, which thus closes the whole upper end of the cylinder and stops the access of air thereto whenever it may be desired so to do; these slides are shown at X X. The lower end of the cylinder is closed in a manner similar to the upper one, by means of the plate V and slide X.

The flange M with its arms t t is secured to the shaft D, so as to bring the upper surface of the said arms, flush with the upper end of the brushes, I), as shown Fig. 2. And over the arms t the head O O is fixed, with its scuppers N, so thatthe flour as it is fed through the hopper opening c c (Fig. 3) will fall upon the head O, and be caught by the scuppers N, so that the centrifugal force of the head O (which revolves with the fans and brushes) will throw the flour against the inside of the gauze cylinder It, which is closely incased with a wooden casing S.

.I is the pulley to which power is applied to drive the shaft D and Y is the pulley to which the power is applied to drive the cylinder It.

The object I propose to accomplish by means of this invention, is first to throw the flour and bran against the inside surface of the cylinder R so that it shall fall between the brushes and the cylinder, which object I accomplish by the use of the head O O, with its tangent scuppers N, upon the top of the said cylinder, and second, the creation of a strong current of air in the inside of the cylinder, so as to blow the flour through the screen as fast as the brushes free it, thus avoiding the necessity of setting the brushes into absolute contact with the wire screen, (as is now the case) which thus saves them from being worn out. This object I accomplish by means of the fans on the brushes and the openings about the shaft I), whereby the current of air is created as aforesaid.

Now suppose the mill to be supplied with bran and flour, through the hole c c (Fig.k

3) it would fall upon the head O, O, and are thrown from thence against the inside of the cylinder, where it would be distributed by the brushes, and the flour would be blown through the screen by the current of air as aforesaid. The flour would then be WILLIAM HALL.

Witnesses AMos BRADDEN, M. RIOHMAN.

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