Improvements in Filters and Filtering Apparatus.
Year: 1890

page_text: Date of Application, 19th Aug., 1890-Accepted, 20th Sept., 1890
Improvements in Filters and Filtering Apparatus.
A communication from abroad by EDWARD JOSIAH TOBIN, Representative of and
for the Firm of Holdsworth, Macpherson and Company, Ironmongers, etc., and
THOMAS DAVIDSON, Filter Manufacturer, all of Sydney, in the Colony of New
South Wales.
I, REGINALD WILLIAM JAMES, of 1 Queen Victoria Street, in the City of London,
Civil Engineer, 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 more particularly to the domestic or household filter although
it is equally applicable to other kinds of filtering apparatus. It has been specially
devised in order to provide increased effective capacity of filtering media with if any-
thing a decrease of size of the same.
These improvements in filters and filtering apparatus consist first in the combination
and arrangement with the respective reservoirs of unfiltered and filtered liquid of the
filtering media constructed as hollow walls around an open space the hollow of such
walls being hermetically closed top and bottom but communicating with the reservoir
for filtered liquid and secondly in the particular combination and arrangement of parts
hereinafter more particularly set forth.
In constructing a domestic filter according to this invention we divide a chamber
into two parts by a disc or wall firmly cemented in so that there shall be reservoirs
for the unfiltered and filtered liquid respectively and this disc or wall we prefer should
be composed of the filtering media preferably limestone and should have through it a
communicating passage between the reservoirs. The filtering media we make by
cutting a deep groove or annulus in the walls of a cylinder also preferably of lime-
stone and firmly closing the ends of such groove or annulus. On the face or foot of
this cylinder we fix a valve or cone with a port or passage to such annulus. Now this
hollow annulus is seated upon the dividing plate in the chamber with its valve or
cone taking into and forming a tight joint on a seating in the communicating orifice
on said division.
In constructing filtering apparatus according to this invention the filtering media
having a hollow annulus or space between closed walls would be set inside the reservoir
for unfiltered liquid and the filtered liquid reservoir communicating with said
hollow annulus or space would be set inside or outside of the first mentioned
reservoir.
But in order that this invention may be clearly understood reference will now be
made to the drawings herewith in which Figure 1 is a section of a filter constructed
according to these improvements and Figures 2, 3 and 4 are enlarged details of parts
of same.
A is filter-body-B filtering cylinder or media-C draw off tap-A¹ is reservoir
for unfiltered liquid-A² receiver for filtered liquid-A³ is orifice-A* valve seating of
india rubber-B is porous dividing disc or wall-B2 annulus or groove-B³ valve or
cone-B port or passage-C is an air pipe. The filtering cylinder B is placed upon
the dividing disc within chamber A' the valve or cone B³ resting upon and making
a tight joint with the valve seating A. The chamber or reservoir A¹ is supplied with
the water or liquid to be filtered which liquid surrounds and filters through the exterior
and interior walls of the cylinder B into the annulus or groove B2 from whence it
passes by port or passage B through valve B³ and orifice A³ into the chamber A² from
whence it is drawn through cock or tap C.
A filtering apparatus constructed according to this invention does not need drawings
to enable the same to be understood for it would consist of a tank or reservoir for

page_text: unfiltered liquid upon the bottom of which or level with the bottom of which is placed
a filtering cylinder B having a port or passage B* as illustrated in the drawing but
instead of the valve or cone B³ having a screwed socket or other connection to which
a pipe might be attached said pipe having its own tap or discharging or communi-
cating with a receiver or reservoir for filtered liquid having its own draw-off cock
or tap and having the necessary air escape pipe.
Having now particularly described and explained the nature of this said inven-
tion as communicated to me from abroad and the manner in which the same is to
be performed I declare that what I claim is :-
First The improvement in filters and filtering apparatus consisting essentially in
the combination and arrangement with respective reservoirs of unfiltered and filtered
liquid of filtering media constructed as hollow walls around an open space said hollows
being hermetically closed but communicating with the filtered-liquid reservoir
substantially as herein described and explained.
Second Filtering media for filters and filtering apparatus constructed as a cylinder
having a hollow shell or walls or as of other forms having hollow walls con-
structed of porous or partly porous material and adapted to be placed in the
unfiltered liquid &c. and having connection from its hollow walls for drawing off
the filtered liquid substantially as herein described and explained.
Third The construction of domestic or household filters substantially as herein
described and explained and as illustrated in the drawings.
Fourth-In filters and filtering apparatus the combination and arrangement with
the hollow walls of filtering media of a cone or valve or a screwed socket or other
connection cemented in the base of such media and having a port or passage to the
hollow thereof substantially as herein described and explained and as illustrated in the
drawing.
Dated thi 1011 1
FELL & WILDING,'
1, Queen Victoria Street, London, E.C., Agents for the Applicant.