IMPROVEMENTS IN APPARATUS FOR GRINDING PHOSPHATES Olt OTHER MATERIALS
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I ISAAC BROWN of India Buildings Edinburgh in the County of Midlothian
North Britain Manure Manufacturer do hereby declare the nature of my said
Invention for "IMPROVEMENTS IN APPARATUS FOR GRINDING PHOSPHATES Olt
OTHER MATERIALS" to be as follows:-
The object of my Invention is to provide a grinding apparatus or mill which
will grind Phosphates or other hard materials for reducing them to fine powder
without the wear and tear of and great cost entailed by such apparatus as hitherto
constructed.
According to my Invention I effect the grinding between the internal surface of
a rim or wheel driven at a high speed and a roller bearing upon the said surface,
a reverse or grinding motion being given to tho said roller by a small roller in
front reversing its forward motion to that of the rim. If found necessary to
increase the power of the first named roller it may have a positive motion given
to it (in the requisite direction, viz' opposite to that of the rim) by a shaft and
pulley or other suitable dovice.
1004
J. HENRY JOHNSON,
47, Lincoln's Inn Fields, London, W.C.,
Agent for the said Isaac Brown.

page_text: I ISAAC BROWN of India Buildings Edinburgh in the County of Midlothian
North Britain Manure Manufacturer, do hereby declare the nature of said inven-
tion for "IMPROVEMENTS IN APPARATUS FOR GRINDING PHOSPHATES OR OTHER
MATERIALS" and, in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:—
The object of my Invention is to provide a grinding apparatus or mill which
will grind phosphates or other hard materials for reducing them to fine powder
with less wear and tear and cost of grinding entailed by other mills or apparatus
as hitherto constructed.
According to my Invention I effect the grinding between the internal surface,
of a rim or wheel driven at a high speed and a cylinder or roller or cylinders or
rollers bearing upon the said surface. The materials to be ground are fed to the
inside of the rim preferably by a hollow trunnion or axis upon which the rim
rotates and the ground material is preferably discharged-through wire gauze or
reticulated material at the sides of the rim. I prefer to combine two sets of these
rims and cylinders or rollers upon the same shaft.
And in order that my said Invention may be more fully understood I.shall now
proceed more particularly to. describe the same and for that purpose shall refer to
the several figures on the annexed sheet of drawings the same letters of reference
indicating corresponding parts in all tho figures.
Figure 1 is a general view of an apparatus constructed according to my Invention
and Figure 2 is a vertical section showing the double arrangement hereinbeforo
mentioned. Each grinder consists of a rim A mounted in bearings or standards B
and with a hollow trunnion C at the one side of each rim through which the
material to be ground is fed. The shaft D connects the two rims A and carries a
pulley E by which a motion of rotation is given to the rims by any suitable
motor. The shaft and the hollow trunnions are connected to the rims by arms a
all the spaces between which are covered with wire gauze or other reticulated or
perforated material as at a². The rim A may be made in segments. The arms a
are connected by a circumferential flange (secured to the rim) which with the boss
may also be made in segments connected together and to the rim A, and shaft D
and trunnions C, by bolts or otherwise. Inside each rim A is a cylinder or
roller G and another smaller cylinder or roller H but this latter may be omitted if
desired or more than two cylinders or rollers may be employed according to the
area of the rims. If two or more cylinders or rollers of different sizes be used the
larger or largest is by preference first in the direction of motion of the rim but if
desired a small cylinder or roller may be arranged in front of the larger roller or
cylinder to reverse the motion given through the rim and the said small cylinder
or roller to the said larger roller or cylinder. The material to be ground is fed in
at the hollow trunnions C and as it is ground it is discharged by centrifugal force
through the perforated or reticulated sides a².
The interior of the rim is shewn as being straight in cross section (from x to y
figure 2) and the rollers as being correspondingly formed as cylinders but the rim
may present a convex or concave or other shaped bearing surface in cross section
if desired the rollers being correspondingly formed. I do not limit myself to the
means shewn for introducing the material to be ground and for removing it when
ground as they may be arranged in any suitable manner.

page_text: 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 :-
First An apparatus, for grinding phosphates or other materials, consisting of a
revolving rim upon the interior surface of which a crushing or grinding cylinder
or roller or crushing or grinding cylinders or rollers bears or bear substantially as
herein before described.
Second-An apparatus for grinding phosphates or other materials consisting of
a revolving rim with perforated or reticulated sides and with a crushing or grinding
cylinder or roller or crushing or grinding cylinders or rollers bearing upon the
interior surface of the said rim substantially as hereinbefore described.
Third: An apparatus for grinding phosphates or other materials consisting of a
rovolving rim with perforated or reticulated sides and with a crushing or grinding
cylinder or roller or crushing or grinding cylinders or rollers bearing upon the
interior surface of the said rim and with a hollow bearing or trunnion through
which the materials to bo treated are fed substantially as hereinbefore described.
Fourth-An apparatus for grinding phosphates or the like consisting of a
duplicated arrangement of the apparatus claimed by the preceding claims and as
herein before described with reference to Figure 2 of the accompanying Drawings.
Dated this 24th day of October 1884.