Improvements in Water Filters.
Year: 1896

page_text: Date of Application, 1st
1st Oct,
1806
Complete Specification Left, 30th July, 1897-Accepted, 4th Sept., 1897
Complete Specification Left, 30th July, 1897-Accepted, 4th Sept., 1897
Improvements in Water Filters.
We, WILLIAM RAILTON of 344 Walton Breck Road, Anfield, and RICHARD
CAMPBELL of 21 Monastery Road, both of Liverpool in the County of Lancaster,
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
steam boilers and other purposes. It is designed to provide a large filtering area
while not increasing the space taken up by the apparatus.
In carrying the invention into effect, we form the filtering and purifying
surfaces of a perforated worm or spiral, whereby the filtering area is much greater
than if made in the ordinary way. This worm or spiral may be made in a variety
of ways such for example as by making the coils of a U-shaped or other suitable
In these coils are perfora-
section with spaces of suitable width between each coil.
tions of any suitable size or shape so as to form a grating or perforated surface
through which water can percolate. The spiral may be in one piece or if preferred
in sections or rings, the sections or rings being bolted together by stay bolts
passing through flanges and end pieces. Covering the coils of the spiral may be
arranged the filtering flannels or other suitable filtering media, the edges of which
are elipped between the flanges of the sections when the latter are bolted together.
The stay rods may also pass through the flanges so that the latter cannot come
off. If preferred however a single sheet or bag of filtering material might be
employed which conforms to the shape of the chamber and may be tied to the
corrugations by tape or in other suitable manner. The chest which receives the
filtering chamber may be formed in the manner set forth in our prior patent
No. 24,411 of 1893 or in any other suitable manner.
The mode of action is as follows:-
The water under pressure entering through the inlet pipe percolates through the
perforated worm or spiral into the hollow chamber leaving the dirt, grease and
other impurities behind on the filtering media, and the purified water is delivered
through the outlet pipe.
We have described the above way in which our invention may be carried into
effect, but it will be obvious that the perforated worm or spiral forming the filtering
or purifying surfaces may be made conical or straight, or there may be a series
of these spirals arranged concentrically if so desired, and furthermore the spirals
may be of any shape. The method of using the filter may of course be reversed
and the purified water led first into the interior of the hollow chamber and out
through the spirals.
1th 20th day of September 1896.

page_text: Improvements in Water Filters.
We, WILLIAM RAILTON of 344 Walton Breck Road, Anfield, and RICHARD
CAMPBELL of 21 Monastery Road, both of Liverpool in the County of Lancaster,
Engineers, 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 apparatus for filtering and purifying water for feeding
steam boilers and other purposes. It is designed to provide a large filtering area
while not increasing the space taken up by the apparatus.
The invention will be understood from the following description, reference being
had to the accompanying drawings, in which it is shown as applied to marine feed
water filters.
Figure 1 is a sectional elevation of the filter;
Figure 2, a vertical cross section; and
Figure 3 a sectional detail view showing one of the sections of the perforated
worm or spiral separated from the others;
Figure 4 plan of filter.
Referring to these Figures, A is the filtering chamber, the filtering and purify-
ing surfaces of which are formed of a perforated worm or spiral B whereby the
filtering area is much greater than if made in the ordinary way. This worm or
spiral B may be of a U-shaped section with spaces of suitable width between
each coil as depicted in the figures. In these coils are perforations of any suitable
size or shape, so as to form a grating or perforated surface through which water
can percolate. The spiral may be in one continuous piece, or if preferred in
sections or rings, bolted together by stay bolts C passing through the annular
plate D¹ and end plate D. Covering the coils of the spiral, may be arranged the
filtering flannels or other suitable filtering media which completely cover each
grating and the edges of the flannels are clipped between the sections in cases
where the chamber is made in sections and bolted together. If preferred however
a single sheet d or bag of filtering material may be employed, which conforms to
the shape of the chamber A B and may be tied thereto by tape or in any other
suitable manner. The chest which receives the filtering chamber may be formed
in the manner set forth in our previous patent No. 24411 of 1893 or in any other
suitable manner, E being the chest which receives the filter chamber Ä, F a
movable door bolted to one end, G the inlet pipe for the feed water, H the outlet
pipe, I the twin valve with twin seatings controlling both the inlet pipe G and the
branch J, and K a valve for controlling the outlet pipe H, L is a spring mounted
between the movable door F and chamber A and adapted to keep the latter
pressed against the seating M, so that the water cannot penetrate into the delivery
side of the filter without penetrating the filtering flannels d.
for enabling impurities collecting in the chest E to be ejected.
Na drain cock
chamber is supported in the manner shown so that the feed water entering the
The filtering
chest E by the inlet pipe G, has to flow through the perforated worm or spiral B
of the chamber A on its way to the outlet pipe H.
The mode of action is as follows:-
Water under pressure entering through the inlet pipe G percolates through
the perforated worm or spiral B into the chamber A leaving the dirt, grease, and
other impurities behind on the filtering media d, and the purified water is delivered
through the outlet pipe H. The opposite end of the chamber A is closed by the
plate D).

page_text: We have described the above way in which our invention may be carried into
effect, but it will be obvious that the perforated worm or spiral forming the
filtering or purifying surfaces may be made conical or straight or there may be
a series of these spirals arranged concentrically if so desired, and furthermore
the spirals may be of any shape. The method of using the filter may of course be
reversed and the purified water led first into the interior of the hollow chamber and
out through the spirals.
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. The improvement in apparatus for filtering or purifying water, namely,
forming the filtering or purifying surfaces of a perforated worm or spiral con-
stucted in one piece, or in sections or rings bolted together.
2. A filter having a containing chest provided with entrance and exist valves,
and an internal chamber formed of a series of flannel covered worms or spirals
of U-shaped section with spaces of suitable width between the coils substantially
as and for the purpose described.
3. The combination with an external filter chest, of an internal chamber whose
filtering surface is formed of a perforated worm or spiral built up in sections or
rings filtering flannels d covering each coil, bolts C for bolting the sections
together, seating M on the external chest and means for keeping the internal
chamber presssd against the said seating, whereby the water cannot pass to the
delivery side of the filter without percolating through the filtering flannels sub-
stantially as described.
Dotod this 30th day of June 1897
W. P. THOMPSON & Co.,
Of Liverpool, Manchester, Birmingham & London, Patent Agents.