Year: 1898

page_text: Date of Application, 1st Apr., 1898
We, WILLIAM RAILTON, of 344, Walton Breck Road, Anfield, Liverpool, in
the County of Lancaster, and RICHARD CAMPBELL, of 21, Monastery Road,
Liverpool aforesaid, Engineers, do hereby declare the nature of this invention
to be as follows:-
This invention relates to apparatus for filtering and purifying water for feeding
boilers and other purposes and is designed to provide a large filtering area while
economising space.
In carrying the invention into effect, we form the filter with a suitable chest
or casing having an inlet for the unpurified water and an outlet for the purified
water, and we provide in the chest in the path of the water a filtering chamber
made with longitudinal segments capable of being bolted or otherwise secured
together. These segments are made with longitudinal channels of U or Vor like
shape in cross section with flanges at the edges thereof so that when the respective
sections are put together they shall form an entire chamber preferably cylindrical
with a series of longitudinal channels having oppositely arranged channels
between. By this means therefore, the area of the filtering and purifying sur-
faces is very much greater than an ordinary flat surface would be. The longi-
tudinally arranged channels of the filtering chamber are perforated with openings
of any suitable size or shape so as to form gratings through which the water can
pass. Covering completely each grating, are filtering flannels or other suitable
filtering media, which are held down in each outside channel or concavity of the
segments by means of longitudinal. binding wires or rods so that the flannels
cannot possibly come off. If preferred however a single sheet or bag of filtering
material may be employed which conforms to the shape of the chamber and may
be applied to the segments in any suitable way. The lower portion of the chest
which contains the filtering chamber is constructed to form a dirt collector
provided with a sludge blow-off cock for enabling the impurities collecting in the
chest to be ejected. The filter chest is fitted with a valve chest containing a main
inlet conduit from the pump to the filter, an outlet conduit from the filter to the
boiler, and a by-pass or branch for connecting the inlet and outlet direct when
required. The inlet conduit delivers unpurified water into an annular chamber
near the top of the filtering chest which surrounds the segmental filtering
chamber, and this annular chamber is fitted with a perforated grid through which
the water passes before it reaches the filtering and purifying surfaces. This in-
let conduit is by preference bifurcated at or about a point where it delivers water
into the annular chamber. The outlet conduit leads from the inside of the
filtering chamber at the bottom, upwards to the valve chest and so to the boiler.
The inlet conduit in the valve chest is provided with a twin valve with twin seatings,
so arranged that when this twin valve is closed on its upper seat the water will
flow direct into the filter. Should however the filtering flannel become con-.
taminated and require renewal this twin valve is closed on its lower seat, thus

page_text: opening the upper seat, the result of which is that the filtering apparatus is shut
off, and the water passes direct to the boiler. through the branch without passing
through the filter at all. The outlet conduit is also fitted with a valve by which
the outlet from the filter can be closed when the water is passed direct through the
branch to the boiler without passing through the filter at all. To clean the out-
side of the filtering chamber this valve is raised from its seating and water caused
to flow into the apparatus and eject the dirty water and sludge through the cock,
or if the interior of the hollow chamber require cleaning, the twin valve is closed on
its lower seating and the other valve opened, thus reversing the current and carrying
the washings 'through a sludge cock located in the annular chamber that surrounds
the filtering chamber. The filter chest/is fitted with a movable door bolted to one
end, and between this door and the filtering chamber there is a spiral spring
mounted between, which is adapted to keep the chamber pressed against the
seating on which it is mounted, so that water cannot penetrate into the delivery
side of the filter without penetrating the filtering flannels. The segments forming
the longitudinal filtering chamber may be bolted or rivetted together so as to form
one piece, the top end of the cylinder being fitted with a solid end piece which
can be supplied with a removable handle to facilitate the chamber being lifted
in or out of the chest. The opposite end of the chamber is fitted with an end
piece having an outlet hole for the purified water, and the two end pieces are
bolted together by stay bolts, care being taken to provide a watertight joint between
the perforated longitudinal segments forming the sides of the chamber and the
end pieces forming the ends. This latter may be effected if desired by forming
grooves in the inside faces of the end pieces which receive the ends of the longi-
tudinal segments, or other suitable construction may be adopted. Radial flanges
are supplied on the inside of the chest for keeping the filtering chamber central
in the chest.
The mode of action is as follows:-
Water under pressure entering through the inlet conduit percolates through the
filtering surfaces into the hollow chamber, leaving the dirt, grease and other
impurities behind on the filtering flannels, and the purified water is delivered
through the outlet conduit, the construction being such that no water can pene-
trate into the outlet conduit of the filter from the inlet conduit except by first
passing through the filtering flannels and perforated grids.
We have described the above way in which our invention may be carried into
effect, but it will be obvious that the method of using the filter may be altered
and water lead directly into the interior of the filtering chamber and out through
the gratings and flannels into the chest, though we do not prefer this arrange-
ment. The channelled gratings also instead of being arranged longitudinally may
be arranged slightly spiral so as to form a kind of vortex for the water which may
cause the dirt, grease and other impurities left behind in the channels of the filter-
ing chamber to fall off more easily.
01
improvements in Water Filters.
We, WILLIAM RAILTON, of 344, Walton Breck Road, Anfield, Liverpool, in
the County of Lancaster, and RICHARD CAMPBELL, of 21, Monastery Road,
Liverpool aforesaid, Engineer, do hereby declare the nature of this invention

page_text: 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 apparatus for filtering and purifying water for feeding
boilers and other purposes and is designed to provide a large filtering area while
economising space.
The invention will be understood from the following description, reference
being had to the accompanying drawings, in which:
Figure 1 is a sectional elevation of our water filter;
Figure 2 a plan :
Figure 3 a vertical section through the valves;
Figure 4 a horizontal section;
Figure 5 a vertical section of the filtering chamber;
Figure 6 a cross section showing the longitudinal corrugations;
Figure 7 a detail section of the corrugations on a larger scale.
Referring to these figures, we form the filter with a suitable chest or casing A
having an inlet B for the unpurified water and an outlet C for the purified water,
and we provide in the chest A in the path of the water a filtering chamber D
made with longitudinal segments capable of being bolted or otherwise secured
together. These segments are made with longitudinal channels E, of U or V
or like shape in cross section with flanges or rebates d at the edges thereof, so
that the respective sections will fit together and form an entire chamber pre-
ferably cylindrical with a series of longitudinal channels E having oppositely
arranged channels between. By this means therefore, the area of the filtering
and purifying surfaces is very much greater than an ordinary flat surface would
be. The longitudinally arranged channels of the filtering chamber are per-
forated with openings F of any suitable size or shape so as to form gratings
through which the water can pass. Covering completely each grating are filtering
flannels G or other suitable filtering media, which are held down in each outside
channel or concavity of the segments by means of longitudinal binding wires or
rods H so that the flannels cannot possibly come off. If preferred however a
single sheet or bag of filtering material may be employed which conforms to the
shape of the chamber and may be applied to the segurents in any suitable way.
The lower portion of the chest which contains the filtering chamber D is_con-
structed to form a dirt collector I provided with a sludge blow-off cock J for
enabling the impurities collecting in the chest to be ejected. The filter chest
is fitted with a valve chest K containing a main inlet conduit B from the pump
to the filter, an outlet conduit C from the filter to the boiler, and a by-pass or
branch L for connecting the inlet and outlet direct when required. The inlet
conduit B delivers unpurified water into an annular chamber I near the top of
the filtering chest which surrounds the segmental filtering chamber D, and this
annular chamber M is fitted with a perforated grid 0 through which the water
passes before it reaches the filtering and purifying surfaces. This inlet conduit B
is by preference bifurcated at or about a point where it delivers water into the
annular chamber M. The outlet conduit C leads from the inside of the filtering
chamber D at the bottom upwards to the valve chest K and so to the boiler. The
inlet conduit B in the valve chest is provided with a twin valve P with twin
seatings Q and R so arranged that when this twin valve is closed on its upper
seat the water will flow direct into the filter. Should however the filtering.
flannel become contaminated and require renewal this twin valve P is closed
on
its lower seat R, thus opening the upper seat Q, the result of
which is that the filtering apparatus is shut off, and the water passes
direct to the boiler through the branch L without passing through the filter
at all. The outlet conduit C is also fitted with a valve S by which the
outlet from the filter can be closed when the water is passed direct through the
branch L to the boiler without passing through the filter at all. To clean the
outside of the filtering chamber D this valve P is raised from its seating R and
water caused to flow into the apparatus and eject the dirty water and sludge

page_text: through the cock J, or if the interior of the hollow chamber D require cleaning,
the twin valve is closed on its lower seating R and the other valve S opened, thus
reversing the current and carrying the washings through the sludge cock J located
in the annular space I that surrounds the filtering chamber. The filter chest
is fitted with a movable door T bolted to one end, and between this door and the
filtering chamber there is a spiral spring U mounted, which is adapted to keep
the chamber pressed against the seating on which it is mounted, so that water
cannot penetrate into the delivery side of the filter without penetrating the
filtering flannels. The segments forming the longitudinal filtering chamber are
rebated together at their adjacent edges, the top end of the cylinder being fitted
with a solid end piece X which can be supplied with a removable handle W to
facilitate the chamber being lifted in or out of the chest. The opposite end of
the chamber is fitted with an.end piece X' having an outlet hole c for the purified
water, and the two end pieces are bolted together by stay bolts H, care being
taken to provide a watertight joint between the perforated longitudinal segments
forming the sides of the chamber 1) and the end pieces X and X¹ forming the
ends. This latter may be effected if desired by forming grooves in the inside
faces of the end pieces which receive the ends of the longitudinal segments or
other suitable construction may be adopted. Radial flanges Y are supplied on
the inside of the chest for keeping the filtering chamber central in the chest.
The mode of action is as follows:-
C
Water under pressure entering through the inlet conduit B percolates through
the filtering surfaces into the hollow chamber D, leaving the dirt, grease and
other impurities behind on the filtering flannels G and the purified water is
delivered through the outlet conduit C, the construction being such that no water
can penetrate into the outlet conduit C of the filter from the inlet conduit B except
by first passing through the filtering flannels and perforated grids.
We have described the above way in which our invention may be carried into
effect, but it will be obvious that the method of using the filter may be altered
and water lead directly into the interior of the filtering chamber and out through
the gratings and flannels into the chest, though we do not prefer this arrange-
ment. The channelled gratings also instead of being arranged longitudinally
may be arranged slightly spiral so as to form a kind of vortex for the water which
may cause the dirt, grease and other impurities left behind in the channels of
the filtering chamber to fall off more easily.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
1. In a water filter forming the filtering or purifying surfaces of a longi-
tudinally corrugated filtering chamber, said chamber being constructed of longi-
tudinal segments fitted together to form an entire chamber, and secured together
by bolts, substantially as described.
2. In a water filter, the combination with a containing chest provided with
entrance and exit valves of an internal longitudinally corrugated flannel-covered
perforated filtering chamber, the corrugations of said chamber being formed by
making the chamber of longitudinal segments with oppositely arranged channels
arranged alternately, the segments being built up and secured together by bolts
to form an entire chamber, substantially as described.
Dated this 31st day of December 1898
WM. P. THOMPSON & Co..
Patent Agents, of Liverpool, Manchester, Birmingham, and London.