US643220A - Tube or pebble mill. - Google Patents

Description

(No Model.)

tlnrrnn Starts FFICE@ CHARLES L. CARMAN, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE GATES IRON WORKS, OF SAME PLACE.

TUBE OR PEBBLE MILL.

SPECIFICATION forming part of Letters Patent lvm-643,220, dated February 13, 1900.

y Application filed February 20, 1899. Serial No. 706,183. (No model.)

To ctZZ whom it may concern:

Be it known that I, CHARLES L. CARMAN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Tube or Pebble Mills, of which the following is a specification.

My invention relates to that class of mills which are called tube or pebble mills, in which there is a rotatable barrel adapted to l hold material to be crushed and adapted during its rotation by the use of balls or pebbles to pulverize any material which may be contained therein.

The principal object of my invention is to provide a simple, economical, and efficient tube or pebble mill.

- pressions, and means for removably holding such sections in position.

The invention consists, further, in the combination of a rotatable barrel, a lining for the same composed of a plurality of removable sections arranged longitudinally with the barrel to form alternate elevations and depressions and provided with beveled lateral abutting edges, and means for removably holding such sections in position.

The invention consists, further and finally, in the features, combinations, and details of construction hereinafter described and claimed.

In the accompanying drawings, Figure l is a longitudinal elevation of a portion of a mill constructed in accordance with my improvements, partly in section, and showing the means for driving the same; Fig. 2, an en- In the art to which this invention relates it is well known that the power required to drive this class of mills is proportionate to the speed of rotation, and therefore that it is desirable to rotate the tubular portion of these mills as slowly as possible in order to more economically accomplish the operation of grinding or crushing, and, further, that to accomplish this result efficiently by slow rotations of the tubular portion it is desirable to provide a lining for the barrel which will prevent the material from slipping down on the concave surface of the barrel. It is further well known that the cylinder should be lined to prevent its wearing out, and that this lining should, if possible, be made so as to obtain the longest life of the'parts with the best possible results in grinding. The principal ob ject of my invention therefore is to provide a tube or pebble mill of such construction and arrangement that the tendency to slip is minimized and a lining provided which will give the maximum length of service.

In constructing a mill in accordance with my improvements I make a rotatable tubular portion A of the desired size, shape, and strength to accomplish the desired results. In order to provideY a lining for this barrel which can be removed at pleasure for the purpose of renewal or repair and at the same time prevent the tendency of the material to slip during the rotations of the tube, I make a 1iningcomposed of a plurality of removable sections B and B', which, as shown in Fig. 2 of the drawings, form alternate thick and thin sections. From an inspection of the drawings it will be seen that these sections are arranged longitudinally with the barrel, alternating in thick and thin sections, the thick sections being preferably the narrowest and having convex u pper surfaces, while the thin sections are the widest and have concave surfaces. Each of these sections is provided with beveled lateral edges b, abutting against the beveled and lateral edges of the adjacent section in such manner that the thick sections act as wedges and serve to lock all of the sections togetherand to the tubular portion. In order to hold these thick sections removably in engagement with the tubular portion, and thus secure all the parts together, I provide IOO them With countersunk holes or perforations plurality of alternate thick and thin sections b and provideva series of stove'bolts andnuts b2, which are passed through such counter perforations in the sections and the tube in such manner that the bolts can be tightened or loosened from the outside of the barrel, thus facilitating the removal or insertion of the sectional lining whenever desirable or necessary.

In Fig. 1 I have shown a train of gears C, D, E, and G for driving or rotating the barrel, which is mounted on a pillow block or blocks H on a foundation I, though this part as Well as the other undescribed parts form no material feature of the invention and are merely illustrated and described for the purpose of showing one method of driving the rotatable barrel.

I claiml. In a machine of the class described, the combination of a rotatable tubular portion, a lining for the same composed of a plurality of removable sections arranged longitudinally with the barrel to form alternate elevations and depressions and provided With beveled lateral abutting edges, and means for removably holding such sections in position, substantially as described.

2. In a machine of the class described, the combination of a rotatable tubular portion, a removable lining for the saine com posed of a with abutting beveled lateral edges arranged longitudinally With the barrel to form alternate elevations and depressions, and means for removably holding each alternate section in position, substantially as described.

3. In a machine of the class described, the combination of a rotatable tubular portion, a removable lining for the same composed of a pluralityof alternately thick and thin narrow and Wide sections With abutting beveled edges arranged longitudinally With the barrel to form alternate elevations and depressions, and means for removably holding such sections in position, substantially as described.

4. In a machine of the class described, the combination of a rotatable tubular portion, a removable lining .for the same composed of a plurality ot' alternately thick sections having convex upper surfaces and thin sections having concave upper surfaces, each sectionhaving beveled abutting lateral edges arranged longitudinally With the barrel to form. alternate elevations and depressions, and bolt-and- 'nut mechanism for holding the thick sections and thereby all the sections in position, substantially as described.

CHARLES L. GARMAN. lV itnesses:

THOMAS F. SHERIDAN, THOMAS B. McGREooR.

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