Improvements in Machinery or Apparatus for Crushing and Grading Ores, Quartz, and other Materials.
Year: 1896

page_text: Improvements in Machinery or Apparatus for Crushing and Grading
Ores, Quartz, and other Materials.
We, JAMES WOOD, of 15, Dacre Road, Manor Park, Plaistow, Engineer, and
WILLIAM WALLIS CLARK, of 76, Romford Road, Stratford, Engineer, both in the
County of Essex, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in machinery for crushing and grading
quartz and other materials, whereby the material is more economically crushed
and more evenly graded than by the machines hitherto in use.
In carrying out our invention for crushing ore, quartz and other materials
preparatory to grading we employ three rollers the bearings of the inner ends of
the axles of which are carried in a triangular angle iron frame, the outer ends
being carried in a hexagonal frame, connected to standards at opposite sides, the
rollers being rotated by the pan as usual. As the material is crushed it passes
through the perforations in the pan to the grader.
Our grader is constructed of a suitable casing provided with a number of
inclined surfaces placed one below and in advance of the other, a space being left
between the front and back of the surfaces, except in the case of the uppermost
one which has a space only in front. At the upper part of the apparatus is a
hopper into which the crushed material falls from the pan of the crusher, the
said hopper having the usual regulating door or damper for feeding the material
into the apparatus, and at the lower part of the apparatus is a shoot for the dis-
charge of the graded material the discharge opening of the shoot being provided
with a hinged flap which will allow the discharge of the material but will close
against the air. Below the shoot is the air inlet with the usual fan and at the
upper part of the apparatus is the discharge opening for the air and dust or
slimes. The material to be graded, being introduced into the machine, as above
mentioned, from the crusher, will fall on to the first inclined surface against
a current of air from the fan and in passing on to the next inclined surface will
also encounter a current of air forced through the space between the two inclined
surfaces and so on atil it reaches the shoot.
By this construction it will be obvious that we obtain a number of separate
currents of air each of which passes independently through the material, which
thus becomes more thoroughly cleansed from dust or slimes than with apparatus
as hitherto used.
It will be obvious that our crusher and grader can be used independently of one
another.

page_text: COMPLETE SPECIFICATION.
Improvements in Machinery or Apparatus for Crushing and Grading
Ores, Quartz, and other Materials.
We, JAMES WOOD, of 15, Dacre Road, Manor Park, Plaistow, Engineer, and
WILLIAM WALLIS CLARK, of 76, Romford Road, Stratford, Engineer, both in the
County of Essex, do hereby declare the nature of this invention to be as follows:-
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 for crushing or grinding
and grading quartz and other materials, whereby the material is more economically
crushed or ground and more evenly graded than by machines hitherto in use.
In carrying out our invention for crushing or grinding ore, quartz and other
materials preparatory to grading we employ rollers the bearings of the inner ends
of the axles of which are carried in an inner iron frame, the outer ends being
carried in a suitable frame, connected to standards at opposite sides, the rollers
being rotated by the pan as usual. As the material is crushed or ground it passes
through the perforations in the pan to the grader.
Our grader is constructed of a suitable casing provided with a number of inclined
surfaces placed one below and in advance of the other, a space being left between
the front and back of the surfaces and the casing. At the upper part of the
apparatus is a hopper into which the crushed or ground material falls from the
pan of the crusher or mill, the said hopper having the usual regulating door or
damper for feeding the material into the apparatus, and at the lower part of
the apparatus is a shoot for the discharge of the coarse material of not sufficient
fineness, the discharge opening of the shoot being provided with a hinged flap
which will allow the discharge of the material but will close against the air.
Below the shoot is the air inlet and at the upper part of the apparatus is the dis-
charge opening for the air and that part of the material which has been ground
to the required degree of fineness in the mill.
To enable our invention to be fully understood we will describe it by reference
to the accompanying drawings, in which:-
Figure 1 is a plan of a three roller crusher or mill made according to our
invention;
Figure 2 is a sectional elevation thereof, the section being on the line 2-2
Figure 1;
Figure 3 is a vertical section of a grader constructed according to our invention;
and,
Figure 4 is a plan of the same.
Referring to Figures 1 and 2, a is the pan of the crusher or mill which is of
ordinary construction and is rotated by any suitable means. b, b, bare the three
rollers which are rotated by the revolution of the pan a, and e, c, c are the inde-
pendent axles thereof. d, d, d are the bearings in which the said axles c, c, c
are mounted, the said bearings d, d, d being in the form of caps which fit closely
against the lateral surfaces of the rollers b, b, b so as to prevent the access of dust
to the bearings. e is the inner iron frame upon which the inner bearings d of
the axles c are carried, and f is the outer frame to which the outer caps of the
bearings and the inner frame are secured. In the case of a three roller crusher
or min as here illustrated the inuer frame is made triangular and the outer frame
hexagonal in shape. 9, 9 are the two standards at opposite sides of the crusher

page_text: in which the two frames are guided. The pan a of the crusher or mill is perforated
to allow the crushed or ground material to escape into the grader.
Although we have described our improvements as applied to a three roller
crusher or mill which is the arrangement we prefer in practice it will be obvious
that in the case of small crushers or mills or when it is required to keep the
first cost as low as possible our arrangement of hearings for the rollers of crushers
or mills can be applied to crushers or mills having say two rollers only.
Referring now to Figures 3 and 4, A is the casing of the grader and i, i, i are
the inclined surfaces which are placed one below and in advance of the other, a
space being left in front of the surfaces and a space at the rear thereof. / is
the hopper at the upper part of the apparatus into which the crushed or ground
material falls from the pan of the crusher, the said hopper having the usual
regulating door or damper for feeding the material into the apparatus, and m
is the shoot at the lower part of the apparatus for the graded material. is the
flap provided in the shoot w, the said flap being flexible so that it allows the
graded material to escape down the shoot but closes against air pressure. is
the air inlet at the lower part of the apparatus and y is the discharge opening at
the upper end thereof for the escape of the air and that part of the material which
has been ground to the required degree of fineness in the mill.
Our improved apparatus is employed as follows,-The material after it has
been crushed in the crusher or mill, above described, falls through the perfora-
tions in the pan thereof and is introduced into the hopper, the door of which
being opened allows the material to fall on to the first inclined surface i against a
current of air created by a fan, the said air flowing in the direction indicated by
the arrows shewn in Figure 3, the material then passing on to the next inclined
surface and again encountering a current of air passing through the space between
the two uppermost inclined surfaces and so on until it reaches the shoot me through
which the part of the material which has not been sufficiently ground in the
crusher is allowed to escape to be again conveyed to the crusher for further
treatment.
By this construction it will be obvious that we obtain a number of separate
currents of air each of which passes independently through the material which
thus becomes more thoroughly separated than with apparatus as hitherto used.
It will also be obvious that our crusher or mill and grader can be used inde-
pendently of one another.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:
1. A crusher or mill for ores, quartz and other materials wherein the rollers
rotate on independent axles mounted in hearings supported upon an inner frame
and an outer frame secured together and held in suitable supports, substantially
as, hereinhefore described and illustrated.
2. A grader for ores, quartz and other materials comprising a casing having a
number of inclined surfaces arranged one below and in advance of the other and
that a space is left in front of the topmost surface and both in front and behind
the remaining inclined surfaces, the said grader being provided with a feed hopper,
discharge shoot, an opening at the bottom of the apparatus for the inlet of air
and an opening at the top for the escape of the air carrying with it the fine
material, substantially as, and for the purpose, described and as illustrated.
3. The employment in combination with a crusher or mill for ores, quartz and
other materials of the kind described in Claim 1 of a grader of the kind described
n Claim 2.
4. The combination and arrangement of parts forming the improved crusher
or mill for ores, quartz and other materials, hereinbefore described and illustrated
n Figures 1 and 2 of the accompanying drawings.
5. The combination and arrangement of parts forming the improved grader for

page_text: ores, quartz and other materials, hereinbefore described and illustrated in
Figures 3 and 4 of the accompanying drawings.
Dated the 13th day of July 1897.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.