Year: 1893

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 18 of the Patents, &o., Act, 1883), as allowed
by the decision of the Chief Examiner of the 17th day of April 1897,
We, WILLIAM RAILTON of 5 Goschen Street, 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 to make it
suitable for feeding steam boilers or for drinking and cooking purposes.
It is designed to provide a large filtering area, while not increasing the space
taken up by the apparatus.
In carrying our invention into effect, we form the filtering chamber corrugated,
these corrugations being perforated and of any suitable shape or size, whereby the
filtering area is much greater than if made in the ordinary way. The chamber is
formed of one piece or in several sections. This chamber is provided with flannel
or other suitable filtering medium secured to the corrugations, and preferably tied
round with tape to hold the flannel in place. The chamber is supported
concentrically on a rod and is located in a horizontal, vertical or in any other
suitable position.
The mode of action is as follows :-
The water under pressure entering through the inlet valve percolates through
the perforated corrugations of the casing into the filter chamber leaving the
impurities behind, and the purified water is delivered through a suitable outlet.
Suitable drain and blow through cocks may be provided for cleaning the filter and
a double action valve may be provided. The latter is so formed that the inlet
valve can be closed and the by-pass valve opened simultaneously when it is required
to cut the filter off for cleaning purposes.

page_text: 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. It is designed to provide a large filtering area, while not increasing
the space taken up by the apparatus.
The accompanying drawings show the invention as applied to marine feed water
filters; in which:-
Figure 1 is a sectional elevation :
Figure 2, a cross section :
Figure 3, a section through one of the corrugations; and
Figure 4, a side view of the corrugations showing gratings or perforations.
By our invention, we form the filtering and purifying surfaces of a series of
perforated corrugations, formed by sections or rings whereby the filtering area is
much greater than if made without corrugations in the ordinary way. A is a
corrugated filtering chamber, the corrugations of which are perforated with
openings of any suitable size or shape, so as to form a grating through which
water can pass. This chamber made in sections or rings a, as shown in the
drawings (Figures 1 and 3), these corrugated sections or rings being bolted
together by stay bolts B, passing through the flanges a¹ and end pieces C. D are
the filtering flannels or other suitable filtering media, which completely cover each
grating, and the edges of which are clipped between the flanges a' of the sections,
when the latter are bolted together, the stay rods B also passing through the flannels
BO that the latter 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 tied to the corrugations by tape or in any other suitable manner.
E is a chest which receives the filter chamber, the lower portion of which is
constructed to form a dirt collector; F, a movable door bolted to one end; G, the
inlet pipe for the feed water; H, the outlet pipe; I, a twin valve with twin
seatings i and for controlling both the inlet pipe G and the branch J; K, a
valve for controlling the outlet pipe H; L, a spiral spring mounted between the
removable 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; Na drain cock for enabling impurities
collecting in the chest E to be ejected. An air cock (not shown) may be provided,
if desired, in the chest E. The filtering chamber is supported in the manner
shown, or in any other suitable nanner, so that the feed water entering the chest E
by the inlet pipe G has to flow through the corrugations of the chamber A on its
way to the outlet pipe H.
The mode of action is as follows:-
The water under pressure entering through the inlet pipe G, percolates through
the perforated corrugations into the hollow chamber A., leaving the dirt, grease and
other impurities behind on the filtering media, and the purified water is delivered
through the outlet pipe H. When it is proposed to clean the filter, the valve K is
closed, the valve I shut down on its seating and the sludge cock N opened to
empty the chest. The outside of the corrugations are cleaned by raising the
valve 1 from its seating, thus enabling water to flow into the apparatus and eject
the dirty water and sludge through cock N, or if the interior of the hollow

page_text: chamber A require cleaning, valve I is closed on its seating and valve K opened,
thus reversing the current and carrying the washings through the sludge cock.
Should it be proposed to cut off the filtering apparatus to enable the filtering
flannels to be renewed or repaired, the valve H is closed and the valve I shut down
on its seat and thus the water will pass direct to the boiler without entering the
filter at all. The movable door F can then be taken off, and the filtering cage A
taken out of the chest and new flannels put in.
The method of using the filter may of course be reversed, and the purified water
led in through the hollow chamber A and out through the valve I.
Having now particularly described and ascertained the nature of our said inven-
tion, 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 series of perforated corrugations,
constructed in sections or rings bolted together.
2. A filter having a containing chest, provided with entrance and exit valves,
an internal chamber formed of a series of flannel covered perforated corrugations,
formed by sections or rings as described and a tightening device whereby the
chamber can be squeezed against its seatings and the water cannot penetrate into
the delivery side of the filter without penetrating the filtering flannel substantially
as described.
3. The special arrangement of parts consisting of the sections or rings forming
the perforated corrugated chamber A, the filtering flannels D covering each
corrugation, the bolte B, and a tightening device substantially as and for the purpose
described.
4. In apparatus of the kind mentioned, the special arrangement of valves I and K
substantially as and for
purpose set forth.
Dated this 2nd day of May 1894.
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Birmingham, Nottingham, and London,
Patent Agents.