Improvements in Feed Water Filters.
Year: 1894

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c., Act, 1883), as required by
the decision of the Law Officer of the 29th day of July 1896.
Date of Application, 7th Dec., 1894
Complete Specification Left, 7th Sept., 1895-Accepted, 12th Oct., 1895
PROVISIONAL SPECIFICATION.
Improvements in Feed Water Filters.
I, WILLIAM JAMES HOWIE ADAM, Manager, of 1 Keir Terrace, Pollokshields,
in the City of Glasgow, do hereby declare the nature of this invention to be as
follows:-
This invention which relates to feed water filters has for its object to make
provision for subjecting the feed water to double filtration, first through one
medium and then through another, in order to eliminate the lightest oils present in
the feed water whilst avoiding increase of dimensions and cost of the apparatus.
The improved filter is composed of a series of grids which may be encased as
usual in a cylindrical or annular chamber, each of the alternate grids being divided
into two compartments by a web or partition and being open at the ends to receive
and discharge the water, whilst the intermediate grids are open throughout their
length and closed at their ends or perimeters.
Between the grids the usual filter cloth or other filtering material is placed and
the whole of the grids are secured together. An annular space is formed
between the filter casing and the grids and this space is divided by means of
webs or partitions into two compartments connected with the inlet and outlet
respectively.
The feed water entering one compartment of the casing passes into the open
ended grids thence through the filtering medium between those grids and the close-
ended grids. Thence the water thus filtered passes from the latter grids through
the filtering medium into the open ended grids beyond the webs dividing them and
into the second compartment of the casing, being thus twice filtered before issuing
by the discharge outlet in the casing.
11001

page_text: Improvements in Feed Water Filters.
I, WILLIAM JAMES HOWIE ADAM, Manager, of 1 Keir Terrace, Pollokshields,
in the City of Glasgow, 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 which relates to feed water filters has for its object to make
provision for subjecting the feed water to double filtration, first through one
medium and then through another, in order to eliminate the lightest oils present
in the feed water, whilst avoiding increase of dimensions and cost of the
apparatus.
As illustrated by the accompanying drawings, Fig. 1 of which is a vertical
section and Fig. 2 a plan, the improved filter is composed of a series of grids A, A',
of conical or cylindrical form which may be encased as usual in a cylindrical or
annular chamber B each of the alternate grids A' being divided into two
compartments a, a', by a web or partition a² and having openings a³ at the
ends to receive and discharge the water, whilst the intermediate grids A are open
throughout their length and closed at their ends or peripheries.
The grids A, A', are fitted with projections C which fit into suitable grooves D
on the filter casing G whereby the annular chamber B is divided into two sections
and the water on entering by the inlet E is prevented from passing unfiltered to
the outlet F. To ensure a tight joint a piece of steel is inserted in each of the
grooves and held in position by set screws, or wedges of rubber or asbestos
jointing.
Between the grids A, A', the usual filter cloth or other filtering material is
placed and the whole of the grids A, A1, are secured together.
The feed water entering by the inlet E into one compartment of the casing G
passes into the compartment a of the open ended grids A¹ which communicate with
the inlet side of the filter casing G thence through the filtering medium between
the open and the close ended grids A, A'. The water then enters the close ended
grids A and thus filtered passes from the latter grids again through the filtering
medium into the open ended grids A¹ beyond the webs a dividing them and into
the second or outlet compartment of the casing G being thus twice filtered before
issuing by the discharge outlet F in the casing G.
The filter chamber cover I may be domeil, as shown, so as to provide a place
for air to gather or for an absorbent to be packed on the top of the internal grida
to retain any free oil; or it may be flat so as to utilise space, or sunk so as to form
a convenient arrangement to fix the grids A, A', without the use of a set screw.
A sludge cock is provided at I by which deposits etc. are discharged, and this may
be fitted with a spring valve, so as to form an escape cock in the event of an
exceptional increase of pressure. The filter is fitted with pressure gauge J, scuin
cock K and soda cock L with steam pipe connection, for cleaning without taking
off the cover. A suitable arrangement of bye-pass pipe M and valve N is also
shown on the drawings and may be modified to suit the requirements of each
The improved filter is also applicable for filtering other liquids such as sewage
case.
water and the like.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that I am aware
that filters have been constructed in which a number of similar rings or grids
arranged one on top of the other have been employed, and of the Patent granted
to Anthony Harris No. 19925/92, and I do not claim as my invention the use of

page_text: such rings or grids, or any of the matters covered by the claims in the specified
Patent granted to Anthony Harris, but what I claim is-
1. A filter constructed substantially as described and adapted for double
filtration of feed water or other liquid.
2. In a filter for feed water or other liquid the improved construction and
arrangement or combination of the grids supporting the filtering medium
substantially as described.
Dated this 6th day of September 1895.
WALLACE FAIRWEATHER,
Chartered Patent Agent,
62 Saint Vincent Street, Glasgow, Agent for the Applicant.