US36580A - stoker and james d - Google Patents

Description

J. J. STORER & J. n. WHELPLEY.

GRINDING MILL. No. 36,580.

Patented Sept. 30, 1862.

"UNITED STATES PATENT OFFICE.

J; J. STORER AND JAMES D. WVHELPLEY, OF BOSTON, MASSACHUSETTS.

GRINDING-MILL.

To all whom it may concern;

Be it known that we, JAcoB JONES STORER and JAMES DAVENPORT WI-IELPLEY, of Boston, in the county of Sufiolk and State of Massachusetts, have invented an Improved Grinding or Triturating Mill for Reducing Ores and other Substances to Powder and Collecting the Dust or Bowder so Produced, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification, in which Figure 1, is a perspective view of the triturator fan and collecting apparatus. Fig. 2, a vertical section of the same, on the line of the driving shaft. Figs. 3, 4t and 5, details to bereferred to.

Our present invention consists in a tuturating mill, in which the ores of metals or other substances are reduced to a fine powder or dust, and from which the powder or dust is carried off as fast as produced through a central opening in the drum or case of the triturator, by a suitable fan or blower; the coarser particles being left in the mill, to be again and again acted on until sufficiently reduced to be carried away by the currents produced by the fan or blower; and our invention further consists in connecting with a mill for producing the powder or dust, and a fan or blower for carrying off the same, a collecting chamber where the dust or powder may be collected.

That others skilled in the art may understand and use our invention we will describe the manner in which we have carried it out.

In the said drawings A is the frame work with cross braces a b in which rest boxes or bearings 0 in which runs a shaft B, which is revolved rapidly by any suitable power applied to the pulley O. A drum or shell D is supported on the frame A, with its heads (Z, 6, in a vertical position. The dimensions of this drum will depend on the class of work for which it is intended, the one here shown, which is intended for metallurgic operation, is four feet in diameter and twelve inches in depth or through the rim f. A hopper E attached to the head 6 communicates by a central opening 9, through the head with the interior of the drum D. Through this hopper and opening the ore or other substance to be triturated is introduced into the drum. A hub h, attached to the shaft B, within the drum D, carries a heavy metal disk F next to the opening 9, and another disk nearer to' the outlet is, this latter disk has openings 2' near its center for the passage of air and the fine dust as it is produced, to the outlet lc. A screen H, of wire gauze or of finely perforated metal covers the outlet h (but may be attached to the blower). The shaft B, also carries a fan or blower I, the central opening Z, of which communicates with the opening is of the drum, the common opening being protected by the screen. This fan may be placed as here shown close to the drum D, or at any convenient distance, and on an independent shaft, the conductor m being lengthened. This fan sucks out the fine dust as fast as it is produced by the triturator, and throws it through a spout or conductor K Fig. 1, attached to the periphery of the fan case, into a suitable collecting chamber.

' The improved apparatus which we employ for collecting the dust or powder, will be presently described.

To the periphery of the disks F and G are attached at convenient intervals, hammers or strikers M, the form of which and the method of attaching them to the disks is shown in Figs. 2 and 3. The striker itself is a bar of steel or of iron faced with steel or hard cast iron nearly as long as the depth of the drum, three to seven inches in width and from one half to two and a half inches thick on the face a, the back is beveled ofi at 0 to make the striker clear itself better in passing through the mass which is being operated on. An arm p, is attached to the striker M, near each end, which fits between ribs 1" on the disks F, and G, and is secured thereto by bolts and nuts 8 passing through holes in the disks and through slots 3 in the arm 3),- this permits the striker to be adjusted nearer to or farther from the rim f, of the drum, as is sometimes requi-v a smooth unbroken surface, the mass of ore' or other material when'set in motion by the strikers M, would be driven before the strikers, and would not be as often struck as is desirable and even when the rim and sides are corrugated the depressions fill up and the effect is but little changed. To cause rapidly repeated blows to'be given to the. pieces or particles of the mass and to obstruct the circular motion of the air, we have adopted the following construction of the drum; the bolts t which confine the two heads (Z and e of the drum together are passed through immediately under or inside of the rim f, thus forming chambers or recesses u Fig. 3, between each two bolts, The pieces or particles are thrown violently against these bars t and checked in their motion, falling thence again before the hammers.

In operating on some materials such as grain, we find it of advantage to bring the strikers M, close to the rim f at one edge of the drum, this we accomplish by elevating the shell of the drum on the frame A, to make it eccentric to the shaft B, bringing the strikers M, closer to the rim f of the drum, at its lower side that at the top; in which case we place the bolts 6, outside of the rim f, at the lower part of the drum, say for one third of its circumference. The drum D is connected with the frame A by cleats 1: which are attached to the rim of the drum and are secured to the frame A, by screws m. A wedge shaped block w is let into the rail of the frame A and is held in position by a screw 5, passing through a slot in the block-when it is required to raise the shell of the drum D, the screws a: are turned back, and the block w is pushed farther in and is secured in place by the screw 5, which is tightened up; the screws a: are then again turned down tight. As we do not wish to confine ourselves to any particular substance or material to be operated, these changesof construction and arrangement will sometimes be necessary, for the better and more efficient operation of our triturator when acting on various substances. e also wish it understood that we do not confine ourselves to the use of two disks F and G as in some cases where the drum is of smaller dimensions, a single disk F will be sufficient, but our reason for using the whole disk F next to the inlet 9 is that we wish to produce currents of air from the periphery of the drum toward the central outlet 2' to draw the fine dust or powder out of the drum as fast as produced by means of the fan I, while the centrifugal action of the strikers M, tends to throw the coarser particles toward the periphery of the drum. Where two disks are used the currents of air are drawn as indicated by the arrows, Fig. 2, up over the disk F down between the two disks and out through the openings 2', 7b, to the fan I.

In some cases we use more than two disks, but it is necessary that the first one' F should have no openings at its center; or if an open disk or arms be used, that a close disk should intervene between it and the inlet g.

Instead of sucking out the air from the outlet 2', the fan may blow the air into the inlet 9 in which case the currents of air will follow the same course indicated by the arrows in Fig. 2.

As it is necessary that the fine dust or powder produced by the triturator should be collected in order to make it available, and to submit it to further treatment we have devised the following described apparatus for this purpose.

The dust when driven from the fan I, through the conductor K is received in a long box P, the sides of which are inclined inward toward the bottom; the one here shown is made of a frame 9 covered with cotton cloth .2, through which the air from the fan will be forced, leaving the dust or fine particles to fall to the bottom of the box, or the top only may be made of cloth and the sides of wood. The wooden bottom of the box has a series of holes a the wood around the edge of each hole, is beveled ofl? to an edge 5, as shown in section in Fig. 4, that the dust may not lodge but run down the hole. down from each hole a and has a flat groove 6 around it; a bag S is placed under each hole a and is held in place by a stout rubber band 0 which is slipped over the neck of the bag and compresses it into the groove 6 of the tube 5 For the covering 2, of thebox P, and also for the bags S, we use a cloth which has a nap on the inner side as it serves better to arrest the fine dust, while the airlfrom the fan I, is driven through it, a carded cotton drill (known as canton flannel) or a felted cloth we have found to answer best for this purpose.

In some cases (for example when treating gold ores) the dust may be collected in a close water tank, placed under the box 1?, instead of using the bags S, and whenthe dust from ores and other substances is to be 7 treated by heat as in smelting, it may be thrown by the fan I, directly into a suitably constructed furnace.

By the use of such a triturator as we have described, with a disk F opposite to the inlet 9 and a central opening or outlet in connection with a fan or blower I, we are enabled to obtain the fine dust or powder from the mill as fast as it is'produced without its being mixed with coarser particles; the centrifugal action of the mill tending to throw all the coarser particles toward the rim 7, while only those particles which are light enough to be influenced by the currents A short tube or throat 5 extends of air, which as before stated are from the rim toward the central outlet, are taken from the mill, the remainder being again and again acted on until sufficiently reduced. In mills of this class which have been made with the outlet close to the periphery of the shell or drum, and the material when reduced to powder was expelled by centrifugal force, or by currents produced by the arms of the grinding apparatus, a very large percentage of coarse particles were necessarily thrown out along with the fine dust, and required subsequently the use of a bolting apparatus or successive regrindings, a fault which we have overcome.

By applying the conductor K to one end of the box P, the heavier dust may be collected in the bags S, nearest to this end and the lighter portions in the bags at the other end of the box. But in ordinary grindings the conductor K will enter the top of the box P.

The screen H, may in some cases be placed farther from the triturator, or other screens or sieves may be introduced at other points when required.

To facilitate the cleaning out of the drum D, which sometimes becomes necessary, and also to gain access to the strikers M, to renew or adjust them, we have provided an opening through the lower side of the rim 7", Which is closed by a door W, hinged at 10 as shown in Fig. 4, and held. shut by a strong bar X or other convenient fastening.

What we claim as our invention and clesire to secure by Letters Patent is 1. A triturator having a disk F, and a central outlet is, in combination with a fan or blower I, for producing currents from the rim toward the central outlet, to carry off the dust or fine powder as it is produced substantially as specified.

2. We claim the strikers M, with a thin edge n in advance, substantially as specified.

3. e claim the chambers or recesses on the inner face of the rim f, for the purpose specified.

4:. We claim in combination with a mill or triturator for producing fine dust or powder, and a fan or blower for carrying along the dust or powder, a collecting chamber or box P, covered or partially covered with a suitable cloth which will permit the escape of the air while it retains the dust or powder; substantially as set forth.

JACOBJ. STORER. JAMES D. WHELPLEY. In presence of- CHARLES W. RowELL, WM. T. M. ODIOVNE.

DISCLAIMER.

To the Commissioner of Patents:

Your petitioners, citizens of Boston, county of Suffolk, State of Massachusetts, represent that they are now holders of the entire interest, as trustees, by assignment dated Dec. 7, 1867, recorded at Patent Office J any. 16, 1868, from James D. WVhelpley, Mary L. WVhelpley, Jacob J. Storer, and Horatio R. Storer, under the patent of the United States to Jacob J. Storer and James D. Whelpley, dated Sept. 30, 1862, No.

36,580, and that they have reason to believe that through inadvertence and mistake the specification and claim of said Letters Patent are in one instance too broad, including a mechanism of which the said patentees were the first inventors, but which is simply a substitute, being the same in mechanical effect for what was known before; and that the Letters Patent are defective in another instance because of an error in description in the claim and specifications.

Your petitioners therefore hereby enter their disclaimer to the third claim, which is in the following words: We claim the chambers orrecesses u, on the inner face of the rim f, for the purpose specified, and the construction implied.

And they also enter their disclaimer to the Words, thin edge in advance, in the second claim, the same being an error in cleing obviously the reverse.

Boston March 4th, 1870. V

THOS. WM. CLARKE. WM. s. DEXTER.

Witness CHAS. M. NIOKERSON.

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