Improvements in or relating to Machinery for Granulating, Crushing and Screening Stone, Ore, and like Materials.
Year: 1898

page_text: Date of Application, 10th Mar., 1898-Accepted. 23rd Apr., 1898
Improvements in or relating to Machinery for Granulating,
Crushing and Screening Stone, Ore, and like Materials.
I, WILLIAM HENRY BAXTER, of 71, Gelderd Road, Leeds, in the County of York
Engineer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement:-
This invention relates to improvements in machinery or apparatus for granulating,
crushing and screening stone, ore, and like materials.
The object of the present invention is, first, to combine a revolving screen having
an elevator arranged within a portion of its internal periphery with a pair of crushing
or granulating rollers whereby any material that has not been sufficiently reduced
may be automatically returned to the rollers; second, to provide means for driving
the said screen and elevator from the said rollers; and thirdly, to afford facilities for
the proper lateral adjustment of the rollers for preventing end play.
I attain these objects by mechanism hereinafter described and illustrated in the
annexed drawings, in which :-
Fig. 1 is a front elevation of part of the apparatus with the screen removed for
more clearly illustrating the granulating and crushing portion thereof.
Fig. 2 a front elevation of the screen and elevator.
Fig. 3 a transverse section on line x x Fig. 4, with the screen also shown in
section.
Fig. 4 a plan looking at the top.
Like parts in all the views are marked with similar letters of reference.
A is the framework of the machine provided with detachable end plates A¹ A²
which are bolted thereto. On the sides of the framework are provided suitable slides
on which the blocks B B¹ work. The blocks are arranged to form bearings for the
shafts CC upon which the crushing or granulating rollers D D¹ rotate, the sides of
the framework being slotted for the shafts to pass through.
The blocks B B are capable of adjustment by means of the bolts E_E¹ provided
respectively on each side of the machine and armed with lock nuts.
Each pair of
the said bolts is arranged to pass through lugs arranged at one end of the machine
and at the opposite end thereof to pass through a suitable head F formed in parts
somewhat similar to a pedestal, and made to embrace the boss or axial bearing in
which the driving shaft G is mounted. On the bolts are also mounted the com-
pensating springs H H¹.
A rotary motion is imparted to the rollers D D¹ from any suitable source of power
to the driving shaft G (on which is mounted the driving pulley I, fly-wheel J, and
spur pinion K) through the pulley I, spur pinion K, and spur gearing L L' mounted
respectively upon the ends of the shaft CC.
All the above parts are of ordinary and well known construction.
In order to prevent the ends of the rollers D D¹ having a lateral movement by the
wearing away of the sides of the framework A A I provide the pieces M which are
arranged to be dovetailed into the framework A between the two rollers so that one
piece is sufficient for each end of the same, as shown at Fig. 4.
These pieces may

page_text: extend any suitable and required distance below the centre of the roller shafts and
they are arranged to project inwards beyond the face of the sides of the
framework. Whenever they have become worn as to allow of an end play of
the rollers they can be readily and easily replaced with new ones at a small cost.
N is the circular screen having an elevator N¹ provided within its inner periphery
at, say, the portion nearest to the rollers D D'. The buckets n of the elevator are
formed by rivetting or otherwise fixing plates to the end piece n¹, (which is in the
form of a flange or ring) and internal ring n², so that the plates will project from
the periphery inwards. The screen N containing the elevator N¹ is fixed by its
end ³ to the disc O provided with a long boss 01 mounted on the shaft W as shown
at Fig. 3. The end of the screen is provided with any required number of
openings n through which the material to be operated upon is passed to the screen
and elevator and from thence to the rollers as hereafter described.
To prevent the end 3 wearing away by the passage of the material it is
strengthened and protected by the plate P having a number of openings therein to
correspond with those in the end n³ of the screen. The perforated plate P can be
renewed as circumstances require.
Instead of driving the screen, containing the elevator, by bevel gearing, and
feeding the material thereto as I have hitherto done, it is driven and fed as
follows:-
On the end of the shaft C beyond the block B is mounted and fixed by the set
screw », or keyed or otherwise secured, a muff like coupling or sleeve R¹, to form a
bearing for the end of a short counter shaft W or spindle of smaller diameter than the
roller shaft, upon which are mounted and keyed or otherwise fixed the spur wheel R
and disc O armed with the boss 0¹. The opposite end of the screen shaft W is carried
in a suitable bracket or stand W¹. If desired the bearing for the inner end of
the screen shaft W may be formed in a boss cast on the side of a block B or on the
framework A. Between the outer end of the roller shaft C and the inner end of the
smaller shaft W is left a space for lubricating purposes to which a communication is
made by means of the passager in the sleeve R¹.
On the shaft C¹ of the roller D¹ is mounted and fixed a pinion S which gears with
the spur wheel R.
The spur wheels R and S may be geared so as to rotate at any
required speed, but I have found, by experiment, when geared five to one satisfactory
results may be obtained. By mounting the spur wheel R upon the shaft C and to
run in gear with the pinion S fixed upon the end of shaft C₁, it permits of the
screen containing the elevator, being driven from the rollers.
In order that the material to be operated upon may be fed to the apparatus from
any suitable source through the cone T which is fixed to the end of the screen as
shown at Fig. 3, the material after passing through the cone T falls into the screen N,
when the finer portions thereof pass through its perforated periphery at N* for
conveyance to any required place by ordinary means. Any material that will not
pass through the said perforations passes during the rotation of the screen over the
internal ring n into the buckets n and is carried round by the screen-that is,
elevated, until it is in a position to fall into the chute U, arranged, say, above the
spur wheel R, through which it passes to and between the granulating and crushing
rollers D D, and is returned to the screen again by means of chute V arranged below
the rollers.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The improvements in or relating to machinery for granulating, crushing and
screening stone, ore and like materials consisting of combining a pair of granulating
and crushing rollers mounted in suitable bearings with a revolving sereen containing
an elevator driven from the said rollers, substantially as herein described and
illustrated.

page_text: 2. In granulating, crushing and screening machinery such as herein described the
means employed for driving the screen containing an elevator by gearing direct from
the granulating and crushing roller shafts, substantially as set forth and illustrated in
the accompanying drawings.
3. In granulating, crushing and screening machinery such as herein described the
combination with the granulating and crushing rollers and their supporting framework
of the pieces M dovetailed into said framework, as and for the purposes herein set
forth.
4. The combination with the revolving screen containing an elevator of the cone T
as and for the purposes herein set forth."