US808004A - Shell and core for crushing-rolls. - Google Patents

Description

No. 808,004. PATENTED DEC. 19, 1905. W. G. BRYANT.

SHELL AND GORE FOR GRUSHING ROLLS.

.ing of one from the other and also to remove WALTER G. BRYANT, OF GARTERVILLE, MISSOURI.

SHELL AND CORE FOR ORUSHlNG-ROLLS.

Specification of Letters Patent.

Patented Dec. 19, 1905.

A licati fil d March 14, 1905. Serial No. 250,106.

To all whom it may concern:

Be it known that I, WALTER G. BRYANT, a citizen of the United States, residing at Carterville, in the county of Jasper and State of Missouri, have invented a new and useful Shell and Core for Crushing-Rolls, of which the following is a specification.

This invention relates to crushing-rolls for ore-mills.

The objects of the invention are in a simple, ready, thoroughly feasible, and practical manner to prevent the shell from working loose from the core, to obviate the neces sity of wedging the shell to the core around the entire diameter of the latter, to remove practically all of the strain from the keys employed in combining the shell with the core, to extend the life of the shell, and generally to simplify the construction and increase the efficiency of crushing-rolls, cores, and shells.

With the above and other objects in view, as will appear as the nature of the invention is better understood, the same consists in the novel construction and combination of parts of a cruslfing-roll, as will be hereinafter fully described and claimed.

In the accompanying drawings, forming a part of this specification, and in which like characters of reference indicate corresponding parts, Figure 1 is a view in perspective of a shell and core combined with a shaft exhibiting the present invention. Fig. 2 is a perspective detail view of the core and shaft, showing, further, the relative disposition of the keys. Fig. 3 is a view in side elevation of the shell.

Referring to the drawings, 1 designates the roll-shaft, 2 the core, and 3 the shell. As usual, the core is made of soft gray iron and the shell of chilled iron or steel.

The present invention resides in the novel manner in which the core and shell are held combined so as positively to preclude loosenpractically all the strain from the keys or wedges and transfer it to the walls of the bore of the shell. As herein shown, the core is polygonal in cross-section, preferably an irregular octagon, although it may be of any other polygonal form that may be desired, and is provided in this instance in four of its spaces with longitudinally-extending keyseats 4, the bottoms of the successive seats converging to the roll-axis from opposite ends of the roll, so that when the keys 5 are positioned any tendency on the part of the core to shift relatively to the shell or the latter to shift relatively to the core Will be positively prevented, as the shell will be wedged against any movement in all directions. The shell is provided in the wall of its bore with four longitudinal key-seats 6, which are of the same depth throughout their entire length. The coaction between the core and the shell is accentuated by the fact that the keys 5 are of wood and will swell when wet, and thus firmly engage all of the walls of the seats in the core and the shell.

In practice the bore of the shell will be of the same diameter tlnoughout, as also the core, and it is further designed that these parts shall have a neat fit, so that when in operation the strain upon the shell will be transferred to the faces of the core and not to the keys, these latter serving principally as a means of holding the parts assembled and not of withstanding any torsional strain.

As usual, the core is provided with a longitudinal bore, in which is fitted the shaft 1, which is held in position therein by a plurality of keys, (in this instance two, designated 7 and 8,) the object for employing more than one key being to guard against any separation of the core from the shaft, it being apparent that while it is possible for one key to work loose the working loose of both would be practically impossible.

Heretofore in combining a shell with a core it has been the practice to make the core of less diameter than the shell and to drive wooden wedges in between the two parts around the entire periphery of the core. This is not only expensive and troublesome, but it is not thoroughly effective for preventing the shell from working loose upon the core. From the present procedure, it will be seen that when the shell is to be combined with the core it will only be necessary to provide four keys in this instance, although, as will be obvious, a greater or less number may be employed to secure the shell and core positively together.

I elaim 1. A crushing-roll core polygonal in crosssection and provided withlongitudinal wedgekey-seats, the bottoms of the successive seats converging to the roll-axis from opposite ends of the roll.

2. A crushing-roll polygonal in cross-section and provided with longitudinal wedgekey seats extending throughout its entire length, the bottoms of the successive seats converging to the roll-axis fromopposite ends I key-seats to register with those of the core, to of the roll. and keys engaging the seats.

3. A crushing-roll core polygonal in cross- In testimony that I claim the foregoing as section and provided with longitudinal keymy own I have hereto affixed my signature seats extending throughout its entire length, I in the presence of two Witnesses. the bottoms of the successive key-seats converging to the roll-axis from opposite ends of the roll, in combination With a shell having a polygonal core-engaging bore provided with WVALTER G. BRYANT.

Witnesses:

CHARLES INNIS. FRANK B. LOOMIS.

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