reducing other substances requiring to be pulverized
Year: 1886

page_text: I, CHARLES SHEPPARD, of The New Foundry, Bridgend, in the county of
Glamorgan, Engineer, do hereby declare the nature of this invention to be as
follows:-
The object of my invention is to provide more efficient means than at present exist
for reducing brick ends to powder called "Soorkee," and for reducing other substances
requiring to be pulverized."
For this purpose I feed the brick ends or other substances to be reduced through a
hopper into a cylindrical chamber on to a rapidly revolving plate; this plate has a
number of blocks or hammers firmly rivetted to it at suitable distances apart on its
upper surface, the said plate being surrounded by a cylindrical grating formed of
iron or hard steel bars placed at the required distance apart from each other, according
to the degree of fineness to which it is desired to reduce the material, so that on the
substance to be pulverized being fed through the hopper, it falls on to the revolving
plate and is there met by the blocks or hammers rivetted to it and forcibly driven
against the steel bars forming the grating; all the material that is not broken fine
enough by the first blow, falls back onto the plate and is returned over and over again
by the action of the blocks or hammers until the whole of the pulverized material has
been driven through.
The grating is enclosed in a casing of plate iron, a sufficient space being left
between the latter and the grating to allow of the pulverized material falling down
underneath the revolving plate onto another revolving plate, when the substances
operated upon require to be reduced to a greater degree of fineness, the latter
revolving plate being surrounded by a grating similar to that of the former plate
except that the steel bars are shorter and smaller in section and placed closer together.
When, however, the desired degree of fineness can be attained by the use of the
first named revolving plate and its grating the lower plate and its grating is dispensed
with, and the pulverized material is allowed to escape by falling into a chamber

page_text: underneath, suitably formed to allow of its removal, or it can be allowed to fall on to
a fixed circular plate underneath where it is collected or brought by scrapers which
are caused to revolve to a suitable spout for discharging it.
The revolving plate or plates is or are securely fixed to a centre boss of cast iron
keyed fast to an upright spindle which is provided with suitable bearings at each end
and is driven by a pulley or belt, or by bevel or mitre wheels; the speed at which the
said revolving plate or plates is or are driven depends entirely on the nature of the
substance being pulverized.
1000

page_text: I, CHARLES SHEPPARD, of The New Foundry, Bridgend, in the county of
Glamorgan, 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 :-
The object of my invention is to provide more efficient means than at present exist
for reducing bricks or brick ends to powder called "Soorkee" and for reducing other
substances requiring to be pulverized.
In order to enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing in which figure 1 represents a side elevation
and figure 2 a longitudinal section of a soorkee mill constructed according to my
invention; figure 3 is a horizontal section on line A, B, of figure 2. Similar letters
in all the figures represent similar parts.
In carrying out my invention I feed the brick ends or other substances to be
reduced through a hopper A, into a cylindrical chamber B, on to a rapidly revolving
plate C, this plate has a number of blocks or hammers a, firmly rivetted to it, at
suitable distances apart on its upper surface, the said place being surrounded by a
cylindrical grating D, formed of iron or hard steel bars, placed at the required distance
apart from each other, according to the degree of fineness to which it is desired to
reduce the material, so that on the substance to be pulverized being fed through the
hopper A, it falls on to the revolving plate C, and is there met by the blocks or
hammers rivetted to it and forcibly driven against the iron or steel bars forming the
grating D; all the material that is broken fine enough by the first blow, to pass
between the said bars escapes, and that portion which is not broken fine enough to
pass the grating by the first blow from the revolving blocks or hammers falls back on
to the plate C, and is returned over and over again by the action of the said blocks or
hammers until the whole of the material has been pulverized and driven through the
grating.
The grating D, is enclosed in a casing E, of plate iron, a sufficient space F, being
left between the latter and the grating D, to allow of the pulverized material falling
down underneath the revolving plate C, through openings G, in the plate H, onto
another revolving plate C, when the substances operated upon require to be reduced
to a greater degree of fineness, the revolving plate C, being provided with blocks or
hammers a', and surrounded by a grating D₁ and casing E¹, similar to those of the
plate C, except that the steel bars of the grating are shorter and smaller in section
and placed closer together. The pulverized material is then allowed to escape through
openings G', in the plate H', when it falls into a chamber I, underneath, on to a fixed
circular plate J, where it can be collected or brought by scrapers (not shewn in the
drawing) which are caused to revolve, to a spout or shoot K, for discharging it.
When however the desired degree of fineness can be attained by the use of the

page_text: revolving plate C, alone and its grating D, the lower plate C³, and its grating D',
can obviously be dispensed with.
The revolving plates Cand C³, are securely fixed to centre bosses L and L', of cast
iron keyed fast to an upright spindle M, which is provided with a suitable bearing N,
at each end, and is driven by a pulley O, as shewn and a belt (or it can, if desired,
be driven by bevel or mitre gear wheels); the speed at which the said revolving
plates and hammers are to be driven will depend entirely on the nature of the
substance being pulverized.
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. Reducing bricks or brick ends or other substances required to be pulverized in
the manner described by means of a revolving plate provided with blocks or hammers
and a circular grating formed of iron or steel bars substantially as hereinbefore
described and represented in the accompanying drawing.
2. The improved soorkee mill herein before described and represented in the
accompanying drawing.
Dated the 7th day of July 1887.
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicant.