US1090601A - Crushing-roll. - Google Patents

Description

T. B. CROWE.

GRUSHING ROLL.

APPLIoATIoN FILED Nov. 7, 191s.

1,090,601, Patented Mar. 17,1914,

\ J. JZ J0 J JU @JQ Q J f/fg J2 J Q J5 JQ THOMAS B. CROWE, OF COLORADO SPRINGS, COLORADO, ASSIGNOR TO PORTLAND GOLD MINING COMPANY, OF COLORADO SPRINGS, COLORADO, .A CORPORATION OF WYOMING.

To all whom 'it may concern:

Be it known that I, THoMAs B. Cnown, a citizen of the United States of America, and resident of Colorado Springs, El Paso county, Colorado, have invented a certain new and useful improvement in Crushing- Itolls, of which the following is a specification.

My invention relates to improvements in crushing rolls, and more particularly to those rolls employed in ore Crushers. I-Ieretofore in crushers of this character in which the ore is ground between two revolving rolls, difficulty has been experienced owing to the fact that often times a piece of ore will become wedged between the rolls, and instead of being drawn through between the same and crushed, will stick and rub along the surface of the rolls. This tends to wear a corrugation or groove in the roll and thus wears the roll out very quickly.

The object of my invention is to prevent the material from catching in this manner by providing a groove or roughened surface on the surface of the roll, which, when it strikes the piece of ore between the roll, grips the same and draws it through the rolls.

A further feature of my invention is in having these roughened or grooved portions of the roll formed by a series of holes which are bored longitudinally through the shell and located radially about the same in such a manner that as the shell becomes worn down, one hole is brought to the surface so as to form an open groove, and then as the shell wears down past this first hole or groove, the next hole is opened up and forms an operative groove.

My invention will be more readily understood by having reference to the accompanying drawings in which I have illustrated my invention in connection with a pair of Crusher rolls mounted in a well known manner.

Figure 1 is a sectional view. Fig. 2 is an end view of the roll shell. Fig. 3 is a sectional view of the shell.

In Fig. 1, I have indicated a pair of rolls 4 4 mounted in any well known manner in the housing 5. These shells are held t0- gether by spring pressure produced by the springs 6 6 so that they will give slightly, as is necessary in the crushing of the ore. This mounting of the rolls does not form Specieation of Letters Patent.

Application filed November 7, 1913.

CRUSI-IING-ROLL.

Patented Mar. 17, 1914..

Serial No. 799,655.

any part of my present invention, and any suitable mounting can be employed, and it is not thought necessary to describe same in detail. At 7, I have indicated a `hopper for feeding the material between the rolls.

My invention is particularly illustrated in Figs. 2 and 3, in which I show the shell 8 which is placed over each of the rolls 4 4. This shell is usually shrunk on to these rolls in the well known manner. Passing longitudinally through each of these shells 8 are a series of holes 9, 10, 11, 12, 13 and 14. yThese holes are usually one-half inch in diameter,

although, of course, the size of the hole depends upon the size of the crusher and the size of the material being crushed. The first hole 9 is preferably located just below the surface of the roll, so that as the rolls start 1n operation and the ore begins to wear down the surface of the shell below the top of the hole 9, this hole becomes an open groove in the surface of the shell. 'Ihus if any piece of ore becomes caught between the two rolls, and this open groove on either of the shells comes in contact with this piece of ore, it will tend to grip the same and draw it positively through the rolls and thus pre vent it from sticking between the rolls and wearing the surface of the same. As the surface of the shell becomes worn,the groove 9 becomes shallower, until finally the surface of the shell is at a point which corresponds originally to the bottom of the hole pr groove 9, and thus the surface of the shell 1s again smooth. To prevent any ore from sticking at this time, I provide a second longitudinal hole 10, the top of which hole is on a circumferential line just below the bottom of the first hole 9, and thus when the shell is worn down to the point just mentioned, the hole 10 comes into operation and is opened up to form a groove for gripping the pieces of ore caught between the rolls. Farther around the circumference of the shell, I provide a third hole 11 which is located on a line just below the hole l0, and similar holes 12, 13 and 14, each located just below the preceding hole. It will thus be seen that as fast as one groove becomes worn out, so as to become inoperative, the next hole is opened up to form a groove and become operative, and this continues until the shell is worn out and has to be replaced by a new shell. Furthermore, it will be seen that the position of the holes around the circumference in this manner does not tend to weaken the shell as would be the case if a deep groove Were placed at any one particular point. These shells are ordinarily about five inches thick, and the holes being but about one-hall:l inch in diameter, they do not weaken the shell to any appreciable eX- tent.

W'hile I have illustrated and described my invention in connection with crushing rolls mounted in a particular manner, it Will, of course, be understood that my invention is not so limited, but on the contrary my invention relates broadly to a shell for a crushing roll, which roll can be mounted in any desired manner. Furthermore, it Will be understood that the size of the openings `of the holes can be varied to suit the particular conditions of surface, and the number of these holes can be varied.

lVhat I claim as my invention is:

l. A crushing roll provided with a cylindrical shell having therein a longitudinal hole located adjacent to the surface of said shell and adapted to be opened up so as to form a longitudinal groove in said shell as the surface of the shell is Worn out.

2. A crushing roll provided With a cylindrical shell having a plurality of holes eX tending longitudinally through said shell, and arranged radially around said shell, and disposed at varying distances from the surface of said shell.

3. A crushing roll provided With a cylindrical shell having a plurality of holes eX- tending longitudinally through said shell and arranged radially around said shell, and disposed at varying distances from the surface of said shell, the top of one hole being' substantially the same distance from the sur face of said shell as the bottom of the preceding hole.

Signed by me at Colorado Springs, Colorado, this th day of October, 1913.

THOS. B. CROVE.

Witnesses: y

H.V. HOLMAN. FRANK A. HAMILTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C.

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