IMPROVEMENTS IN FILTERS
Year: 1884

page_text: I, FREDERICK BARKER HILL of 69 Campling Road, New Cross Gate, S.E. in the
County of Surrey, do hereby declare the nature of my invention for IMPROVEMENTS
IN FILTERS to be as follows:-
My invention consists in certain arrangements of apparatus whereby the process
of filtering water or other liquid is carried out. For this purpose I use a vessel
connected with the supply pipe which vessel contains within itself a filtering
medium so placed as to leave a space between it and the inner side of the vessel.
This space is in direct communication with the supply pipe and the liquid passing
into this space may be drawn off either through the filter or independently of it.
When the liquid is drawn off independently of the filter it answers the purpose of
cleansing the surface.

page_text: I FREDERICK BARKER HILL of 69 Campling Road New Cross Gate in the
County of Kent Engineer do hereby declare the nature of my Invention for
"IMPROVEMENTS IN FILTERS" and in what manner the same is to be performed
to be particularly described and ascertained in and by the following statement:-
My Invention has for its object certain arrangements of apparatus whereby
the process of filtering water or other liquids is more conveniently and simply
carried out.
For this purpose I use a vessel or chamber connected with the supply pipe
which vessel or chamber contains a filtering medium so placed as to have a space
between it and the internal surface of such vessel or chamber. This space is in
direct communication with the water supply pipe and the liquid passing into this
space may be drawn off either after passing through the filtering medium or
independently of the same-When the liquid is drawn off independently of the
filtering medium, it is by the arrangement of apparatus hereinafter described
caused so to circulate or gyrate in the space between the filtering medium and the
internal surface of the vessel or chamber as to surge against the filtering medium
and so cleanse the surface of such medium by washing away the accumulated dirt
or other impurities from off the said filtering medium and carry such impurities
away from the filter..
F
I am aware that attempts have been made before the date of my Patent to make
use of the unfiltered water in a filter for the purpose of effecting the cleansing of
the filtering medium but such attempts have not been. completely successful: and
I have after many experiments discovered that the reason of the failure of the
above attempts is mainly due to the fact that, the unfiltered water, is not caused to
pass completely through the apparatus and against the filtering medium, with
sufficient force to cleanse it. By the arrangement of apparatus hereinaftor described
I have succeeded in obviating the above errors.
F
In order that my Invention may be fully understood and readily carried into
effect I will proceed to describe it inore particularly by the aid of the accompanying
drawings in which are shewn two modifications of filter constructed in the manner
above referred to.
DESCRIPTION OF THE DRAWINGS.
Fig 1 is a vertical section of one modification of a filter Fig 2 is a plan or
horizontal view showing the position I prefer in this modification for the inlet
from the water supply pipe and the outlet for the unfiltered water-Fig 3 shows
in section another modification of the filter connected with a household supply tank
and having a reservoir for filtered water by means of which a larger supply of
filtered water may be stored and thereby rapidly obtained.
In these several figures the same letters of reference indicate corresponding
parts.
co is the vessel or chamber containing the filtering medium.
a in Fig 1 is the bottom cover of the vessel or chamber which may be either
screwed or bolted to it b is the filtering medium b¹ is a pipo which is inserted
in the filtering medium and through which the filtered liquid is drawn off-c is
the space between the inner surface of the chamber or vessel and the filtering
medium d is the inlet for the unfiltered liquid which it will be seen is placed near
the ton of the vessel and which I prefer to place a little on one side of the vessel

page_text: but it may be placed in any position desired provided it is in such a place or in
such a position as will cause the water to circulate or gyrate round the space
between the filtering medium and the inner surface of the Vessel.
e is the outlet for the unfiltered liquid; is the outlet for the filtered liquid;
g Fig: 3 is a reservoir for filtered liquid; g is the cover of the reservoir, g³ is a
small opening for the inlet and outlet of air and is controlled by a ball which by
floating on the water contained in the reservoir as it rises closes the opening when
such reservoir is full and falls on the water being drawn off leaving the opening
free for admission of air as required.-Any other convenient means for the
admission of air to the reservoir may be adopted.
The action of the filter is as follows:-
:-
The unfiltered liquid enters at the inlet d which as before stated is shewn in
Fig: 2 placed at the top of the vessel or chamber and out of the centre so that
when the liquid is drawn off unfiltered through the outlet e it has to circulate or
gyrate round the filtering medium b and by so doing it cleanses the surface of the
medium and carries off the impurities through the outlet c.
When it is desired to filter the liquid a tap at fis opened and the liquid then
passes through the filtering medium b and through the outlet f.-The outlet f may
be either at the bottom of the filter as shown in Fig: 1 or at the top as shewn in
Fig: 3 And I wish it to be understood that I do not confine myself to the
positions of any of the outlets or inlets as shown but such positions may be varied
as required provided the proper circulation and gyration of the water as above
described is effected.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is:
The construction of a filter with the filtering medium arranged in a vessel or
chamber in such a manner as to leave a space between such filtering medium and
the internal surface of the vessel or chamber and with the inlet and outlet pipes of
the unfiltered water so arranged as when required to produce a circulation or
gyration of the unfiltered water round the filtering mediumn and thereby a scouring
and cleansing action on the filtering medium and on the internal surface of the
vessel or chamber substantially as and for the purpose hereinbefore described.
* Dated this fourteenth day of November 1884.