IMPROVEMENTS IN FILTERS
Year: 1884

page_text: I, FREDERICK BARKER HILL of 69 Campling Street, New Cross Gate London,
S.E. Engineer do hereby declare the nature of my invention for IMPROVEMENTS
IN FILTERS to be as follows:-
.
My improvements consists in the construction of a filter which is intermittent
and also efficient in its action and is as follows In a vessel by preference cylindrical
is placed the filtering material in connection with which is an outlet for drawing
off the filtered water. The water is made to pass mechanically through the filtering
material by means of a plunger, piston or diaphragm On the return stroke of the
plunger a partial vacuum is formed in the vessel and the atmospheric air is drawn
through the said outlet and passing through the filtering material cleans and
renovates it. Under the filtering material I provide a discharge outlet for any
deposit that may be collected. When the filter is not in use the filtering material
is exposed to the atmosphere which renders its filtering properties more durable.

page_text: I, FREDERICK BARKER HILL of 69 Campling Street, 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:-
out.
My invention has for its object certain arrangements of apparatus whereby the
process of filtering water or other liquids is simply conveniently and rapidly carried
For this purpose I use a cylinder fitted with a piston and with a screw and
wheel for giving, motion to the piston. In connection with this cylinder I employ
a vessel of a convenient form in which I place the filtering material and from which
vessel is an outlet for drawing off the water which has passed through the filtering
medium and another for carrying away impurities.
In order that my invention may be fully understood and readily carried, into
effect I will proceed to describe it more particularly by the aid of the accompanying
drawing
F
Ja
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Si
1
DESCRIPTION OF DRAWING.!
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The drawing is a vertical section of a filter. a is the cylinder having in this
instance a reservoir a' for the water which is to be filtered-b is the piston bis the
piston rod bist the screw on the piston rod-c is the bridge containing, nut in
which the screw on the piston works is the hand wheel for working piston. e is
a port or opening leading from reservoir a¹ to the cylinder a on the underside of
the piston bthe said piston b being at the top of its stroke if is the passage
leading from the cylinder a to the vessel g which contains the filtering material h.
is the cover of the vessel g and to this cover the filtering material is attached.
jis outlet for the water passing through the filtering material . is the outlet for
carrying away the impurities- is the cock or valve for closing the outlet k when
it is not necessary to discharge the impurities or sediment.
The action of the filter is as follows
The water to be filtered which is contained in the reservoir a¹ passes when the
piston bis (as shown) at the end of its stroke through the port e into the cylinder a.
By turning the hand wheel d and thereby forcing the piston downwards the water
which has passed from the reservoir a¹ into the cylinder a is forced through the
passage and through the filtering material and is discharged by the outlet j.
On the return stroke of the piston any water remaining in the outlet ; or the
filtering material h is withdrawn and the spaces thereof are occupied by the air of
the atmosphere, and the properties of the filtering material are thereby renovated.
In large filters, the piston may be moved by steam or other power in which
case the cock or valve is made to open and close automatically at necessary
intervals.

page_text: 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 which is intermittent in filtering the water, in
aërating the filtering material and in discharging the impurities or sediment
remaining when the water has been filtered all as herein before substantially
described.