US81927A - metherell - Google Patents

Description

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Letters Patent No. 81,927, dated September 8, 1868.

IMPROVED MILLSTONE-VENTILATOR.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, JOHN METHERELL, of Rockford, in the county of Winncbagmand State of Illinois, have invented a new and improved Apparatus for Cooling and Ventilating Millstones; and I do hereby declare that the following is a full and exact description of the same, reference being bad to the accompanying drawings, and to the letters of reference marked thereon.

This invention consists in certain devices and arrangements of air-chambers, passages, and fans, all to be hereinafter more fully described, by which millstones may be efl'ectually cooled and ventilated.

In the annexed drawings, making part of this specification. the same letters refer to identical parts in all the figures, of which- I Figure 1 represents a perspective view of the entire structure and attached gearing.

Figure 2, a vertical longitudinal section through the stones and air-passages.

The stones, A A A, may be of the ordinary construction, and form no part of my invention. They are enelosed'in air-tight drums, the air being admitted through the eye, as shown at a a a. The stones are rotated, as usual, on spindles, which, in this case, terminate in bevel-wheels c c c, gearing into cog-wheels c e 0.

These cog-wheels revolve on the shaft D, to which power is applied in any suitable manner.' The shaft D is also provided with wheels E E E fixed upon it, and adapted. to bands.

From one side of the drums, which enclose the stones, and opening into the drums, are vertical air-passages .or tubes F FF. These bend and enter the side ofthe horizontal air-passage or cooling-chamber G.

At the head of these tubes, and near their entrance into the condensing-chamber G, are small fans, so set and operated as to drive the air into the chamber. The fans are revolved by bands passing over small Wheels fixed on these shafts, and over the wheels E E E on shaft D.

From or near the centre of the condensing-chamber, rises an open shaft or pipe, H, which is surmounted by a central drum, I, carrying a fan, K, which is driven by a. band and wheel, connected by suitable gearing to shaft D. V

The drum has a passage, 0, opening out into the air or other chamber, and thefan is so arranged and operated as to draw the air from the condensing-chamber and drive it out at the passage 0.

There is also provided a scraper, X, arranged to be drawn through the centre OIXPflSSiLgG for the purpose ofremoving the accumulated dust. The chamber may be closed at the ends, and the vertical air-passages at the points z a: w, by means of sliding valves.

If desired, one or more fans may be placed. at the end of the horizontal tube G forthe purpose of insuring a more perfect result when running a number of stones.

The operation of my improved machinery is as follows:

When the mill is in 0peration, the air passes exclusively through the eyes, and, by the revolution, of the stones, is thrown to the periphery, where, in. its heated and expanded state, it rises in the tubes-or passages F F F. The fans, at the head of these passages, revolving with great rapidity, force the air out into the main or cooling-chamber. Into this chamber a. current of cool air is drawn at each end by means of the large fan K.

It is obvious that with the heated air the'dust is also takenfrom the stones and drawn'into the coolingchamber; that by the rush of cool air from eachend of the chamber, the moist and heated air will be cooled and condensed, and that the-moisture will fall to the bottom, while the flour-dust may be carried to a receptionroom provided for that purpose.

It will be seen from the description that three important results aresimultaueously accomplished by the operation of my device.

First, it keeps the millstones constantly cool, thus making it possible for them to work continuously and evenly,-aud producing a better yield and quality of flour.

Second, it takes away with the hot air all dust caused by the millstoues when in motion.

Third, it cools the hot air in the cooling-chamber, and the moisture is thus condensed and collected on the bottom of the chamber, and the flour-dust saved in a dry condition.

As it is absolutely necessary to the 'efi'ective operation of the apparatus thatiall other passages for the admission of air should be closed, except the eyes at which-the air is adu iitted to the stones, it is evident that no dust will be thrown out to fly about the mill. we

Having thus fully described my invention, I wish it understood that I do not confine myself to the precise arrangement of operating-devices, bands, wheels, and gearing, which I have shown, as these may be varied without departing from the spirit of my invention; nor do I restrict myself to the number of the stones or tubes, or to the form of the cooling-chamber; but

What I do claim, and desire to secure by Letters Patent of the United States, is-

The arrangement of the pipes F, provided with fans, as describethincombination with the cooling-chamber G, central passage H, and fan I, as and for the purpose set forth. a

This specification signed and witnessed, this twenty-third day of June, 1868.

- JOHN METHERELL.

Witnesses:

O. A. PENNOYER, G. W. FORD.

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