Year: 1888

page_text: I OSCAR AUGUST BEREND of 10 Neuerwall Hamburg in the Empire of Germany
Merchant do hereby declare the nature of this Invention to be as follows:-
:-
The object of my Invention is to provide means for filtering water or other liquids
whereby the water or other liquid can in a small space be subjected to a very
considerable extent or depth of 'filtering materials and also to as large a variety of such
materials as may be desired. My Invention relates to the kind of filter described in
the Specification of Letters Patent to Carl Johan Bübring No. 3848 of 1887 although
I do not limit myself to the precise construction therein described and shewn.
According to my Invention I arrange inside the casing of the filter a number of
partitions which may be of any suitable form but are preferably cylindrical or slightly
tapering upwards. I will describe them as being in the form of cylinders by which
will also be understood the application of my Invention to other forms. Inside
the filter I arrange a number of cylinders concentric with each other and covered
in at top by a covering in which are openings which can be closed water-tight by
means of lids or covers. These openings are for the purpose of enabling the filtering
materials to be placed in and removed from the spaces between the cylinders with
facility The cylinders have openings or perforations through or passages past them
alternately at top and at bottom, those or that in the outer cylinder being say at
bottom, those or that in the next inward one at top those or that in the next
inward one at bottom and so on in any desired number. The middle of the central
cylinder is occupied preferably by a block of filtering material with a space
above it and an opening into it into which protrudes the inward end of
the outlet tube from the filter-The filtering material may consist of charcoal
and asbestos prepared as described in the Specification of a Patent granted
to the said Carl Johan Bühring No. 7619 of the 25th May 1887 and it is filled into
the filter in the space between the filter and the arrangement of cylinders described
and into the spaces between the cylinders I may use the same kind of filtering
material in all parts of the filter but I prefer to use different kinds of filtering media
at different parts or spaces of the filter so that the liquid first passes through a

page_text: material which removes the grosser impurities and then through other materials which
are of a nature to complete the purification or filtration already begun by the other
I prefer to use in addition to the ordinary materials; slag, wool,
pipe-clay or silicious earth and place them in the different compartments or spaces of
the filter.
material.
The water or liquid to be purified or filtered enters from say the top of the filter.
and passes into the space between the two outer-most cylinders then through or over'
the top of the next cylinder and so on the water thus taking a very extended circuitous
path passing into the space between two cylinders then along that space and into the
next space between the second and third cylinders and so on upwards and downwards or
in reverse directions until it finally reaches the outlet in a thoroughly purified or
filtered condition.
DL: 01-1
+1000

page_text: COMPLETE SPECIFICATION.,
Improvements in Means for Filtering Water or other Liquids.
I OSCAR AUGUST BEREND of 10-Neuerwall, Hamburg in the Empire of Germany,"
Merchant 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 means for filtering water or other liquids
whereby the water or other liquid can in a small space be subjected to a very
considerable extent or depth of filtering materials and also to as. large a variety of
such materials.as may be desired. My Invention relates to the kind of filter described
in the Specification of Letters Patent to Carl Johann Bühring No. 3848 of 1887,
although I do not limit myself to the precise construction therein described and shewn.
I will describe my luvention with reference to the accompanying drawings.
Referring first to Figure 1 this represents in vertical section a filter made according to
my Invention in what I consider its simplest form. According to my Invention I
arrange inside the casing A of the filter a number of partitions which may be of any
suitable form but are preferably cylindrical or slightly tapering upwards. I will
describe them as being in the form of cylinders by which will also be understood the
application of my Invention to other forms. Inside the filter I arrange a number of
cylinders concentric with each other. Two such cylinders B Bare shewn in Figure 1.
They are covered in at top by a covering C in which are openings c which can be
closed water-tight by means of lids stoppers or covers c³. These openings are for the
purpose of enabling the filtering materials to be placed in and removed from the spaces
between the cylinders with facility. D is a cylinder situated between the cylinders B.
It is shewn as having a lower portion with an orifice fitting over the outlet pipe E
but it may be fixed to the bottom of the casing A if desired. The cylinders havo
openings or perforations through or passages past them alternately at top and at
bottom those or that in the outer cylinder being say at bottom as at 6 those or that in
the next inward one at top (shewn in the drawing as a space at d over the top) those
or that in the next inward one at bottom as at 62 and so on in any desired number
according to the number of cylinders which may be used. The middle of the central
cylinder is occupied preferably by a block of filtering material with a space above it
and an opening into it into which protrudes the inward end of the outlet tube E
through which the filtered liquid passes from the filter. Figure 2 shews an
arrangement wherein a much larger number of cylinders B and D are used the parts
in Figure 2 being marked with the same letters as like parts in Figure 1. The
filtering material may consist of charcoal and, asbestos prepared as described in the
Spicification of a Patent granted to the said Carl Johann Bühring No. 7619 of the
25th May 1887 and it is filled into the filter in the space between the filter body or
casing A and the arrangement of cylinders described and into the spaces between the
several cylinders B and D. I may use the same kind of filtering material in all parts
of the filter but I prefer to use different kinds of filtering media at different parts or

page_text: spaces of the filter so that the liquid first passes through a material which removes the
grosser impurities and then through other materials which are of a nature to complete
the purification or filtration already begun by the other material I prefer to use in
addition to the ordinary materials; slag wool, pipe-clay or silicious earth and place
them in the different compartments or spaces of the filter-but I do not limit myself
to the use of any particular material either as the filtering material or the material of
which the filter body or casing, cylinders and other parts are made.
The water or liquid to be purified or filtered enters from say the top of the filter, by
the opening at a and passes into the space between the two outermost cylinders Band D
then through or over the top of the cylinder D then down and under the next
cylinder Band so on the water thus taking a very extended circuitous path passing
into the space between two cylinders then along that space and into the next space
between the second and. third cylinders and so on upwards and downwards or in
reverse directions until it finally reaches the outlet in a thoroughly purified or
filtered condition. The filter body or casing and the divisions B and D may be
arranged as cylinders as described or in, or of, any other suitable form.
+
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, 1 declare that what I
claim is :-
1. A filter provided with two or more cylinders bells or partitions with an
intervening cylinder bell or partition or several such cylinders bells or partitions with
passages to the spaces between them alternately at or towards the lower part and at
or towards the upper part substantially as and for the purpose hereinbefore described.
2. The construction or arrangements of parts constituting filters as herein before
described and shewn in Figures 1 and 2 respectively of the accompanying drawings.
Deted this 28th day of Januar 1889