Improvements in and relating to Crushing and Pulverizing Cylinders.
Year: 1892

page_text: Date of Application, 6th Sept., 1892
Complete Specification Left, 20th Jan., 1893-Accepted, 28th Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in and relating to Crushing and Pulverizing
Cylinders.
I JOHN ROBERT ALSING of 53 Gracechurch Street in the City of London,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements on a former invention for which Letters
Patent were granted to me dated the 13th April 1887 No. 5379 for "Improvements
in the construction of triturating cylinders" and is designed to overcome certain
objections in cylinders constructed according to the aforesaid former Letters
Patent.
In machines constructed according to the aforesaid Letters Patent for fine
pulverizing done with small flint pebbles or porcelain balls the material had always
to be first granulated by some other means such as edge runners by which the
workmen engaged inhaled the fine dust which is very injurious besides which much
time was lost.
Now according to this invention the material can at once be put into the
cylinder and first crushed and then pulverised.
According to this invention I line the cylinder with chilled cast iron which may
be in the form of blocks or otherwise and I also have ribs in casting so that the
material and pebbles will be carried up I introduce into the cylinder chilled iron
balls lignum vitæ balls or boulder flints according to the nature of the substance
to be pulverized and with these balls I put lumps of the material to be pulverized
and after the cylinder has been revolved by suitable means for a short time the
material will be fine enough for the fine pulverising cylinders and even fine enough
for cement and other purposes when not required in a state of impalpable powder.
The cylinder will not require any watching whilst the material is being crushed
and being surrounded by wood no dust will escape.
I also provide outside the cylinder a grid having a sieve of such fineness so
that the material will only pass out when it is sufficiently pulverised.
I use small flint pebbles or small chilled iron balls or marbles for different
kinds of soft material and in cases when mixing is the object as with colors
explosive and the like I propose to use hard wood balls both in the crushing and
pulverizing.
The crushing and pulverizing can by this invention be effected in the same
cylinder by taking out the large balls when the material is sufficiently crushed and
putting in small flint pebbles or chilled iron balls instead when the pulverizing
can be proceeded with.
According to this invention I propose to construct the cylinder so that it
can be charged at one end.

page_text: COMPLETE SPECIFICATION.
Improvements in and relating to Crushing and Pulverizing
Cylinders.
I JOHN ROBERT ALSING of 53 Gracechurch Street in the City of London Manu-
facturer, 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 on a former invention for which
Letters Patent were granted to me dated the 13th April 1887 No. 5379 for
"Improvements in the construction of triturating cylinders" and is designed to
overcome certain objections in cylinders constructed according to the aforesaid
former Letters Patent. In machines constructed according to the aforesaid
Letters Patent for fine pulverizing done with small flint pebbles or porcelaine
balls the material has always to be first granulated by some other means such
as edge runners by which the workmen engaged inhale the fine dust which is
very injurious besides which much time was lost. Now according to this inven-
tion the material can at once be put into the cylinder and first crushed and then
pulverized. According to this invention I line the cylinder with chilled iron
which may be in the form of tongues and grooves in complete blocks or other-
wise and I also have ribs in castings so that the material and pebbles will be
carried up I introduce into the cylinder chilled iron balls lignum vitæ balls or
boulder flints according to the nature of the substance to be pulverized and with
these balls I put lumps of the material to be pulverized and after the cylinder has
been revolved by suitable means for a short time the material will be fine enough
for the fine pulverizing cylinders and even fine enough for cement and other
purposes when not required in a state of impalpable powder.
The cylinder will not require any watching whilst the material is being
crushed and being surrounded by wood no dust will escape. I also provide outside
the cylinder a grid having a sieve of such fineness so that the material will only
pass out when it is sufficiently pulverized.
I use small flint pebbles or small chilled iron balls or marbles for different
kinds of soft material and in cases when mixing is the object as with colors
explosives and the like I propose to use hard wood balls both in the crushing and
pulverizing.
The crushing and pulverizing can by this invention be effected in the same
cylinder by taking out the large balls when the material is sufficiently crushed
and putting in small flint pebbles or chilled iron balls instead when the pulverizing
can be proceeded with.
According to this invention I propose to construct the cylinder so that it can
be charged at one end.
And in order that my said invention may be better understood I will now
proceed to describe the same with reference to the accompanying sheet of drawings
in which :-
Fig. 1 is a cross section through the cover and the grid and the feeding arrange-
ment.
Fig. 2 is a part longitudinal section shewing the end in section in cases where
the axle is cast in one piece on to the end instead of going right through the
clylinder from end to end as may be employed in heavy cylinders.
Figs. 3, 4, and 5 are detail views to an enlarged scale of the grid and cover of
which Fig. 3 is a longitudinal section.
Fig. 4 is an inside elevation and
Fig. 5, a cross section.
The same letters denote the same parts in all the views.

page_text: cast iron and is provided with a rib c. cast on to it all in one piece for purpose
hereafter described; d. is a grid and cover removeable for feeding; e. is one end
of cylinder without feeding arrangement on which is cast the axle f. all in one
piece with the end which is bolted to the cylinder by nuts and bolts g. as shewn
in Fig. 2. h. is a cross section of the ribs on bars of grid so shaped as to prevent
as far as possible any liability to clogging by dust getting between them. i. is a
frame round grid which fits into the feed hole or socket of the machine as shewn
in Figs. 1. and 5. means of fixing handles to grid are provided at j. j. and a
means k. for bar to hold grid firmly on socket is provided 1. and m. are bars to
give strength to the grid in which the means j. j. and A. are situated as shewn in
Figs. 3, 4, and 5. n. is a space which occupies the width and full length and area
between the internal sides of the frame of the grid as shown in Figs. 4 and 5.
and an opening at o. passes through the full enternal length of one side of the
grid frame at o. through which a perforated plate is inserted into the full dimen-
sions of the space n. for the purpose of allowing only the pulverized material
to pass through.
In the arrangement shewn in the drawings the feeding arrangement is in the
grid hole but in heavy cylinders when the axle, passes right along the axis of
the pulverizer from end to end the feeding arrangement may be provided in one
end by a hole of a circular or ring form in which case the end in which it is
situated is necessarily in two pieces the one piece revolving on the axis and the
other fastened to the external cylinder by nuts and bolts g. 9. as shewn in Fig. 2.
and in order to support this piece and the whole cylinder and blocks attached
internally thereto in position radial struts will be fastened to or fitted against
the blocks inside each one of their ends and to the axle at each end at a suffi-
cient distance from feed hole so as to allow the pulverizer to be fed by fresh
material as required.
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
Constructing crushing and pulverizing cylinders substantially as set forth.
Dated this 20th day of January 1895.
1ovo.
BROWNE & Co.,
9, Warwick Court, W.C., Agents for the Applicant: