Improvements in Crushing Rolls for Stone, Ore, and similar Substances.
Year: 1897

page_text: COMPLETE SPECIFICATION.
Improvements in Crushing Rolls for Stone, Ore, and similar
Substances.
I, CHARLES LEWIS CARMAN, Engineer, of 650 Elston Avenue, Chicago, Cook
County, Illinois, United States of America, do hereby declare the nature of my
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement —
My invention relates especially to that class of machines which are commonly
known as "Cornish Rolls" for crushing stone, ore, and similar substances, and
particularly to the means by which such rolls are held in operative position.
The object of my invention is to provide a simple, economical and efficient
mechanism by which the bearing portions are adjusted and held in different
operative positions. A further object of my invention is to provide simple and
efficient means by which the rolls and their bearing portions may be easily removed
from the supporting frame or base, without disturbing the position of any other por-
tion of the mechanism; and the invention consists in the features, combinations and
details of construction hereinafter described and claimed.
In the accompanying drawings, Figure 1 is a plan view of a complete machine,
looking at it from the top, and fitted with my improvements; Fig. 2 a side eleva-
tion, partly in section, taken on line 2 of Fig. 1; Fig. 3 an end elevation; Fig. 4
a perspective view of one of the adjustable brackets, removed from the supporting
base; Fig. 5 a transverse section, taken through one of the bearing boxes on
line 5 of Fig. 1; and Fig. 6 a perspective view of one of the adjustable brackets,
with a portion broken away to show the seat for the bearing box and with the
bearing box removed.
It is well known in the art to which this invention relates that the composition
metal-usually babbit-in the btaring boxes wears out very fast; and, as a con-
sequence, the boxes have to be removed for the purpose of re-babbitting them.
In order to do this, it is necessary to remove the rolls at the same time, which
usually destroys the position, so that when they are replaced it takes considerable
time and expense to re-adjust the parts. Again, it is well known that in the act
of grinding material the strain on the rolls is unequal and often results in injury
to the rolls and bearings, for the reason that no provision is made for relieving
the unequal strain. My invention, therefore, is designed principally to obviate
these defects, by providing simple and efficient means by which the rolls and
their bearing boxes may be removed without disturbing their relation with the
other parts when re-assembled, and by providing means by which the boxes will
accommodate the rolls to unequal strains and permit them to run in different
alignments.
In constructing crushing rolls fitted with my improvements, I use a base A,
of the desired size, form and strength, to support the various parts and mechanisms.
A pair of rolls B B¹ are provided, secured to or forming a part of the shafts b b¹.
The roll B is what may be termed the main roll, in that it is not adjustable,
but has its bearing boxes 62 63 mounted in rigid bracket portions 63 of the base.
The second or adjustable roll B¹ has its bearing boxes 64 mounted in adjustable

page_text: brackets 65, and in order to obtain an adjustment of these brackets, the lower por-
tions are provided with tongues 6º, fitting in grooves 67 of the base. A bolt or rod C
is passed through the rigid part of the base and through an opening in the brackets,
and is provided at one end with a head c and at the opposite end with screw threads,
upon which are mounted a pair of holding and lock nuts c² ². The rear end
of the bolt is also provided with a washer C₁, between which and the rigid portion
of the machine is interposed a set of springs c³, which permit the yielding of the
bracket, bearing boxes and rolls to unusual strains to which the rolls may be
submitted. To position the adjustable roll, a number of "shims " C² are interposed
between the adjustable bracket and the rigid portion of the base-see Fig 2. If
desired more than one pair of brackets may be made adjustable as will be
understood.
To enable the adjustable roll to run smoothly and efficiently, either parallel with
the main roll or in angular relation therewith, the ends of the bearing boxes, as
at 68, are turned on a circle with the center on a line with the center of the shaft,
and are fitted in circular recesses 6º of the brackets. The lower edges 610 of the
boxes are flatted, so as to rest on ledges of the brackets and thus position the
rolls in their vertical position. From the foregoing, it will be seen that if one end
of the roll is subjected to a heavier strain than the other, it may accommodate itself
to such strain and not injure the roll or bearing portion.
To rigidly hold the boxes in position, a flanged cap D is provided for each bracket,
and bolted to such brackets by means of the bolts and nuts d. A hopper E is also
provided, by which the material may be fed to the rolls as desired. Fig. 5 shows
a section through the lubricating cup of the boxes, in which G represents the
lubricant, and the cap for closing the opening.
9
The principal advantage-among the many-resulting from the use of my im-
provements is the facility with which the rolls may be removed and reinserted
without causing any derangement of parts, so as to require readjustment. This
is accomplished by merely removing the cap D, when the roll and its bearing
hores may be readily removed the adjustable bracket remaining fixed, so that
on the re-insertion of the rolls and boxes they will occupy their former relation to
the other roll.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what I
claim is:
1. In crushing rolls, the combination of a supporting base portion, a roll mounted
in rigid bracket portions, a roll mounted in adjustable brackets; two pair of boxes
secured in such brackets so that they may be removed and replaced without dis-
turbing the position of such brackets, a pair of bolts passed through openings
in the adjustable brackets and rigid portion of the machine and provided with
yielding mechanism and securing nuts, and pieces interposed between the adjust-
able brackets and a stationary portion of the machine to position the adjustable
roll, substantially as described.
2. In crushing rolls, the combination of a supporting base portion, a roll mounted
in rigid bracket portions, a roll mounted in adjustable brackets, two pair
of bearing boxes removably secured in the brackets, one pair of which-
those in the adjustable brackets-are pivotally mounted therein, a pair
of bolts passed through openings in the adjustable brackets and rigid portion
of the machine for adjusting the relation of the parts, a set of springs interposed
between the bolt and machine, and pieces or shims" interposed between
the adjustable brackets and stationary portion of the machine, substantially as
described.
«
3. In crushing rolls, the combination of a frame portion having a pair of rolls
mounted thereon, at least one pair of adjustable brackets having recesses with
circular side walls and substantially flat bottoms, bearing boxes with curved
vertical and flat bottom surfaces to fit the bracket recesses and adapted to hold

page_text: at least one of the rolls and so arranged that the boxes may oscillate in a horizontal
plane but are held against other movements, and means for holding the adjustable
brackets in operative position, substantially as described.
Dated this 13th day of April 1897.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.