Year: 1887

page_text: This Specification was, upon the 14th day of August 1888, amended under
Sections 18 to 21 of the Patenis, Designs, and Trade Marks Act, 1883
1, CARL JOHANN BÜHRING, of the firm of C. Bühring & Co., of Hamburg, in the
Empire of Germany, do hereby declare the nature of this invention to be as follows:-
The present invention relates to the construction and arrangement of a high pres-
sure filter which differs from the filters of this class heretofore used in that a special
filtering material is employed, the water service is simpler than heretofore and a
multiple filtration of the water is effected.
In high pressure filters as heretofore constructed the water to be filtered is intro-
duced from above and passes through various filtering layers placed in the filtering
vessel thence flowing off, or being conveyed farther through a pipe at the lower end
of the vessel. Also the vessel and the cover therefor are usually made of cast iron,
and the bell arranged in the interior of the vessel for directing the water through its
proper course and the discharge pipe are of glass.
According to the present invention these parts are of enamelled sheet iron which,
owing to its thinness has a much lighter and more beautiful appearance than cast
iron. The bursting of the vessel and cover, which may be caused by a high water
pressure, by severe frost or by the bolts of the cover being unequally tightened, is
also rendered impossible. Moreover the breaking of the bell or the discharge pipe
cannot now take place.
The tightness of the joint between the cover and the vessel is not, as heretofore,
obtained by means of a flange with screw bolts but more advantageously and simply
by the use of a ring of malleable cast iron, which is divided diametrically and
presents a wedge shaped mouth, its inclined internal surfaces compressing the india
rubber packing ring placed between the edges of the vessel and cover by means of two
screws.
To one half of the ring is cast a small plate having an eye, by means of which the
whole filtering apparatus is fixed to the wall. Heretofore an eye was necessary on
the vessel itself and also a separate support on the rear end of the vessel.
The tightness of the discharge pipe secured to the bottom of the vessel is ensured
by the use of a cork ring, the latter terminating in a cylindrical recess in the charcoal
block upon the bottom of the filter. The bell is placed over the charcoal block serving

page_text: for the filtering. This bell near its bottom is perforated to allow the passage of the
water to be filtered.
At the top of the bell is a cylindrical opening through which the intermediate space
between the charcoal block and the bell is filled up with coarsely granulated charcoal,
the said opening being then closed by a cork or the like. The space remaining
between the bell and the sides of the vessel is likewise filled up with such charcoal,
above the level of the bell.
Over this charcoal is placed an asbestos plate which on the interior wall of the
vessel is turned upwards to form a flange. This asbestos plate which is absent from
the former filters is covered with a layer of finely granulated charcoal, upon which is
placed coarsely granulated charcoal extending into the cover. This layer is surmounted
by a charcoal plate near the inlet, in order to break the stream of water from the
admission pipe whenever it may be too strong.
Upon the cover is arranged an ordinary union joint with which the admission pipo
having a stop cock is connected. Hitherto the connection with the water supply has
been obtained by soldering the pipe to the tap cock or to the main pipe, I now with
greater advantage place a T-piece before the tap cock, the conducting pipe being
screwed to this piece.
If the filtering apparatus is to be connected with a pump, such as the Allweiler
pump, the cock in the admission pipe between the pump and filier is constructed as a
three-way cock, and the pump and filtering vessel are mounted upon a plate which is
fixed to the wall.
The three-way cock has for its object to convey the water coming from the pump
either to the filtering apparatus or directly to an outlet pipe. The cock I prefer to
use differs from that heretofore employed, in that, formerly two-ways have always
remained in communication so that either the filter has not been in action or the water
has fallen back in the admission pipe. In the preferred form of cock however the
channels are arranged in such a manner that every discharge is separately closed so
that the said objections are entirely obviated. The plug of the cock has two passages
placed at right angles to each other and meeting in the centre, whilst the passages
in the body of the cock are so arranged that those passing to the filtering apparatus
and to the direct outlet are exactly opposite to each other whilst the passage
connected with the pump is between the two.
: 14th of No 1987
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.

page_text: I CARL JOHANN BÜHRING, of the firm of C. Buhring & Co., of 21 Spaldingstrasse
Hamburg in the Empire of Germany 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 present invention relates to the construction and arrangement of a high
pressure filter which differs from the filters of this class heretofore used in that a
special filtering material is employed, the water service is simpler ilan heretofore,
and a multiple filtration of the water is effected.
In high pressure filters as heretofore constructed, the water to be filtered is
introduced from above, and passes through various filtering layers placed in the
filtering vessel, thence flowing off or being conveyed farther through a pipe at
the lower end of the vessel. Also the vessel and the cover therefor are usually made
of cast iron and the bell arranged in the interior of the vessel for directing the water
through its proper course and the discharge pipe are of glass.
According to the present invention these parts are of enamelled sheet iron which,
owing to its thinness has considerably lighter weight and a more beautiful appearance
than cast iron. The bursting of the vessel and cover, which may be caused by a high
water pressure by severe frost or by the bolts of the cover being unequally tightened,
is also rendered impossible. Moreover the breaking of the bell or the discharge pipe
cannot now take place.
In the accompanying drawings
Figure 1 is a side elevation partly in section of the improved filtering apparatus.
Figure 2 is a plan of a clamping device hereinafter described.
Figure 3 is a plan and
Figure 4a side elevation partly in section of a modified form of clamping
device.
Figure 5 is a front elevation and
Figure 6 a side elevation of the filtering apparatus showing an improved three way
cock applied thereto.
Like letters of reference indicate corresponding parts in all the Figures.
a represents the filtering vessel b the cover, e the clamping ring for securing the
cover to the said filtering vessel.

page_text: The tightness of the joint between the cover and filtering vessel a may be obtained
more advantageously and simply by the use of a ring c of brass or malleable cast iron
nickled, either divided diametrically and presenting a wedged shaped mouth c¹, its
inclined internal surfaces compressing the indiarubber packing ring d placed between
the edges of the filtering vessel and the cover by means of two screws e or as in the
modified form shown in Figures 3 and 4, by the use of two rings c, of brass
or malleable cast iron, nickled, with four screw bolts (instead of six as hereto-
fore used) hinged to the lower ring the said screws being turned on their
pivots when the apparatus is opened. The upper ring c is formed with a projecting
part so as to overlap part of the lower ring and thus to hide the india rubber
packing d.
With this ring I gain two decided advantages over those of former construction in
that all parts necessary for fixing always remain connected, and that no loss of bolts
or nuts is possible, all that is required being the loosening or tightening of the nnt,
and further that considerable time is saved.
To one half of the ringe is cast a small plate c² having an eye c³, by means of
which the whole filtering apparatus is fixed to the wall. Heretofore an eye was
necessary on the filtering vessel itself and also a separate support on the rear end of
the said vessel.
The tightness of the discharge pipe secured to the bottom of the filtering
vessel is ensured by the use of an asbestos or cork ring which terminates
in a cylindrical recess in the charcoal or other block upon the bottom of the
filter. The bell is placed over the charcoal block serving for the filtering
This bell near its bottom is perforated to allow the passage of the water to be
filtered.
At the top of the bell is a cylindrical opening through which the intermediate space
between the block h and the hell is filled up with coarsely granulated charcoal, the
said opening being then closed by a cork or asbestos plate or the like. The space
remaining between the bell and the sides of the filtering vessel is likewise filled up
with charcoal above the level of the bell.
Over this charcoal is placed an asbestos plate which on the interior wall
of the filtering vessel is turned upwards to form a flange. This asbestos plate
which is absent from the former filters, is covered with a layer of finely
granulated charcoal, upon which is placed coarsely granulated charcoal extending
into the cover. This layer is remounted by a charcoal plate near the inlet, in
order to break the stream of water from the admission pipe whenever it may be too
strong.
Upon the cover is arranged an ordinary union joint with which the admission
pipe having a stop cock is connected. Hitherto the connection with the water
supply has been obtained by soldering the pipe to the tap cock or to the main pipe, I
now with greater advantage place a T-piece m before the tap cock, the connecting
pipe leading to the filter being screwed to this plate.
If the filtering apparatus is to be connected with a pump, such as the Allweiler pump,
the apparatus is constructed as shown in Figures 5 and 6. In this arrangement the
cock in the admission pipe between the pumpo and filter a is constructed as a
three way cock, and the pump and filtering vessel are mounted, upon a plate p
which
is fixed to the wall.
The three-way cock a has for its object to convey the water coming from the pump
either to the filtering apparatus or directly to an outlet pipe. The cock I prefer to
use differs from that heretofore employed, in that formerly two ways have always
remained in communication so that either the filter has not been in action or the
water has fallen back in the admission pipe. In the preferred form of cock however,
the channels are arranged in such a manner that every discharge is separately closed
so that the said objections are entirely obviated. The plug of the cock has two
passages placed at right angles to each other and meeting in the centre, whilst the
passages in the body of the cock are so arranged that those passing to the filtering

page_text: apparatus and to the direct outlet are exactly opposite to each other whilst the passage
connected with the pump is between the two.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I wish it understood that what I
claim is
First: The improved high pressure filter constructed and operating subsiantially as
apparatus and to the direct ontlet are exactly opposite to each other whilst the passage
connected with the pump is between the two.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I wish it understood that what I
claim is
First The improved high pressure filter constructed and operating substantially as
and for the purpose described.
Second-The-improved three way cock constructed substantially as and for the
purpose described.
Dated this 27th day of July 1887.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: Date of Application, 14th Mar., 1887.
Complete Left, 27th July, 1837.
Complete Accepted, 28th Sept., 1887.
I, CARL JOHANN BÜHRING, of the firm of C. Bühring & Co., of Hamburg, in the
Empire of Germany, do hereby declare the nature of this invention to be as follows:-
The present invention relates to the construction and arrangement of a high pres-
sure filter which differs from the filters of this class heretofore used in that a special
filtering material is employed, the water service is simpler than heretofore and a
multiple filtration of the water is effected.
In high pressure filters as heretofore constructed the water to be filtered is intro-
duced from above and passes through various filtering layers placed in the filtering
vessel thence flowing off, or being conveyed farther through a pipe at the lower end
of the vessel. Also the vessel and the cover therefor are usually made of cast iron,
and the bell arranged in the interior of the vessel for directing the water through its
proper course and the discharge pipe are of glass.
According to the present invention these parts are of enamelled sheet iron which,
owing to its thinness has a much lighter and more beautiful appearance than cast
iron. The bursting of the vessel and cover, which may be caused by a high water
pressure, by severe frost or by the bolts of the cover being unequally tightened, is
also rendered impossible. Moreover the breaking of the bell or the discharge pipe
cannot now take place.
The tightness of the joint between the cover and the vessel is not, as heretofore,
obtained by means of a Hange with screw bolts but more advantageously and simply
by the use of a ring of malleable cast iron, which is divided diametrically and
presents a wedge shaped mouth, its inclined internal surfaces compressing the india
rubber packing ring placed between the edges of the vessel and cover by means of two
screws.
To one half of the ring is cast a small plate having an eye, by means of which the
whole filtering apparatus is fixed to the wall. Hereiofore an eye was necessary on
the vessel itself and also a separate support on the rear end of the vessel.
The tightness of the discharge pipe secured to the bottom of the vessel is ensured
by the use of a cork ring, the latter terminating in a cylindrical recess in the charcoal
block upon the bottom of the filter. The bell is placed over the charcoal block serving

page_text: for the filtering. This bell near its bottom is perforated to allow the passage of the
water to be filtered.
At the top of the bell is a cylindrical opening through which the intermediate space
between the charcoal block and the hell is filled up with coarsely granulated charcoal,
the said opening being then closed by a cork or the like. The space remaining
between the bell and the sides of the vessel is likewise filled up with such charcoal,
above the level of the bell.
Over this charcoal is placed an asbestos plate which on the interior wall of the
vessel is turned upwards to form a flange. This asbestos plate which is absent from
the former filters is covered with a layer of finely granulated charcoal, upon which is
placed coarsely granulated charcoal extending into the cover. This layer is surmounted
by a charcoal plate near the inlet, in order to break the stream of water from the
admission pipe whenever it may be too strong.
Upon the cover is arranged an ordinary union joint with which the admission pipe
having a stop cock is connected. Hitherto the connection with the water supply has
been obtained by soldering the pipe to the tap cock or to the main pipe,
now with
greater advantage place a T-piece before the tap cock, the conducting pipe being
screwed to this piece.
If the filtering apparatus is to be connected with a pump, such as the Allweiler
pump, the cock in the admission pipe between the pump and filter is constructed as a
three-way cock, and the pump and filtering vessel are mounted upon a plate which is
fixed to the wall.
The three-way cock has for its object to convey the water coming from the pump
either to the filtering apparatus or directly to an outlet pipe. The cock I prefer to
use differs from that heretofore employed, in that, formerly two-ways have always
remained in communication so that either the filter has not been in action or the water
has fallen back in the admission pipe. In the preferred form of cock however the
channels are arranged in such a manner that every discharge is separately closed so
that the said objections are entirely obviated. The plug of the cock has two passages
placed at right angles to each other and meeting in the centre, whilst the passages
in the body of the cock are so arranged that those passing to the filtering apparatus
and to the direct outlet are exactly opposite to each other whilst the passage
connected with the pump is between the two.
Dated this 14th day of March 1887.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in and relating to Filtering Apparatus.
I CARL JOHANN BÜHRING, of the firm of C. Bthring & Co., of 21 Spaldingstrasse
Hamburg in the Empire of Germany 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 present invention relates to the construction and arrangement of a high
pressure filter which differs from the filters of this class heretofore used in that a
special filtering material is employed, the water service is simpler than heretofore,
and a multiple filtration of the water is effected.
In high pressure filters as heretofore constructed, the water to be filtered is
introduced from above, and passes through various filtering layers placed in the
filtering vessel, thence flowing off or being conveyed farther through a pipe at
the lower end of the vessel. Also the vessel and the cover therefor are usually made
of cast iron and the bell arranged in the interior of the vessel for directing the water
through its proper course and the discharge pipe are of glass.
According to the present invention these parts are of enamelled sheet iron which,
owing to its thinness has considerably lighter weight and a more beautiful appearance
than cast iron. The bursting of the vessel and cover, which may be caused by a high
water pressure by severe frost or by the bolts of the cover being unequally tightened,
is also rendered impossible. Moreover the breaking of the bell or the discharge pipo
cannot now take place.
In the accompanying drawings
Figure 1 is a side clevation partly in section of the improved filtering apparatus.
Figure 2 is a plan of a clamping device hereinafter described.
Figure 3 is a plan and
Figure 4a side elevation partly in section of a modified form of clamping
device.
Figure 5 is a front elevation and
Figure 6 a side elevation of the filtering apparatus showing an improved three way
cock applied thereio.
Like letters of reference indicate corresponding parts in all the Figures.
a represents the filtering vessel the cover, e the clamping ring for securing the
cover to the said filtering vessel.

page_text: The tightness of the joint between the cover & and filtering vessel a may be obtained
more advantageously and simply by the use of a ring e of brass or malleable cast iron
nickled, either divided diametrically and presenting a wedged shaped mouth c¹, its
inclined internal surfaces compressing the indiarubber packing ring d placed between
the edges of the filtering vessel and the cover by means of two screws e or as in the
modified form shown in Figures 3 and 4, by the use of two rings c, of brass
or malleable cast iron, nickled, with four screw bolts (instead of six as hereto-
fore used) hinged to the lower ring the said screws being turned on their
pivots when the apparatus is opened. The upper ring is formed with a projecting
part c¹ so as to overlap part of the lower ring and thus to hide the india rubber
packing d.
With this ring I gain two decided advantages over those of former construction in
that all parts necessary for fixing always remain connected, and that no loss of bolts
or nuts is possible, all that is required being the loosening or tightening of the nut,
and further that considerable time is saved.
To one half of the ring c is cast a small plate c² having an eye c³, by means of
which the whole filtering apparatus is fixed to the wall. Heretofore an eye was
necessary on the filtering vessel itself and also a separate support on the rear end of
the said vessel.
The tightness of the discharge pipe g secured to the bottom of the filtering
vessel is ensured by the use of an asbestos or cork ring g' which terminates
in a cylindrical recess in the charcoal or other block upon the bottom of the
filter. The bell is placed over the charcoal block serving for the filtering
This bell near its bottom is perforated to allow the passage of the water to be
filtered.
At the top of the bell is a cylindrical opening through which the intermediate space
between the block h and the bell i is filled up with coarsely granulated charcoal, the
said opening being then closed by a cork or asbestos plate or the like. The space
remaining between the bell and the sides of the filtering vessel is likewise filled up
with charcoal above the level of the bell.
Over this charcoal is placed an asbestos plate which on the interior wall
of the filtering vessel is turned upwards to form a flange. This asbestos plate
which is absent from the former filters, is covered with a layer of finely
granulated charcoal, upon which is placed coarsely granulated charcoal extending
into the cover. This layer is remounted by a charcoal plate k² near the inlet, ni
order to break the stream of water from the admission pipe whenever it may be too
strong.
Upon the cover is arranged an ordinary union joint with which the admission
pipe having a stop cock is connected. Hitherto the connection with the water
supply has been obtained by soldering the pipe to the tap cock or to the main pipe, I
now with greater advantage place a T-piece m before the tap cock, the connecting
pipe leading to the filter being screwed to this plate.
If the filtering apparatus is to be connected with a pump, such as the Allweiler pump,
the apparatus is constructed as shown in Figures 5 and 6. In this arrangement the
cock in the admission pipe l' between the pump o and filter a is constructed as a
three way cock, and the pump and filtering vessel are mounted upon a plate which
fixed to the wall.
P
The three-way cock n has for its object to convey the water coming from the pump
either to the filtering apparatus or directly to an outlet pipe. The cock I prefer to
use differs from that heretofore employed, in that formerly two ways have always
remained in communication so that either the filter has not been in action or the
water has fallen back in the admission pipe. In the preferred form of cock however,
the channels are arranged in such a manner that every discharge is separately closed
so that the said objections are entirely obviated. The plug of the cock has two
passages placed at right angles to each other and meeting in the centre, whilst the
passages in the body of the cock are so arranged that those passing to the filtering

page_text: apparatus and to the direct outlet are exactly opposite to cach other whilst the passage
connected with the pump is between the two.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I wish it understood that what 1
claim is
First. The improved high pressure filter constructed and operating substantially as
and for the purpose described.
Second. The improved three way cock constructed substantially as and for the.
purpose described.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.