Improvements in and connected with Apparatus for Oleansing Filters.
Year: 1895

page_text: Date of Application, 7th Oct., 1895
Complete Specification Left, 7th July, 1896-Accepted, 15th Aug., 1896
Improvements in and connected with Apparatus for Oleansing
Filters.
WILFRED REEVES of 39 Victoria Street Westminster, Engineer, and T¤e
REEVES PATENT FILTERS COMPANY LIMITED, of 39 Victoria Street West-
minster, Filter Makers, do hereby declare the nature of this invention to be as
follows:-
―:
Our improvements relate to apparatus for washing out filter beds & is applicable
to those filters in which the filtrate is collected by nozzles, or strainers placed
underneath the filtering medium & in which the washing out of the said medium 18
effected by causing water to flow upwards through the bed.
Whilst it is necessary to have the largest possible area for collecting the filtrate
it is desuable to reduce this area during the operation of washing out so as to
IDCI case the velocity of the water passing upwards through the filtering medium.
In carrying our invention into practice we provide a certain number of the said
nozzles or stiainers with valves which allow the filtrate to flow freely downwards
but which automatically close the said nozzles or strainers when the water flows
upwards for the purpose of washing out the filtering medium.
The number of nozzles or straшers to be fitted with these valves is regulated by
the pressure of the water available for washing out purposes For example where
the pressure is great it will not be necessary to fit as many nozzles or strainers with
valves as where the pressuro 18 small.
These valves may be of any suitable form. for instance a ball valve in which the
ball is automatically forced upwards by the water so as to close the lowe aperture
of the nozzle or strainer.
In this way we secure a large collecting area for the filtrate and at the
same time automatically provide an outlet as sinall as may be desired for the wash
out water.
We
Ve may also in place of fitting valves to individual nozzles or strainors, fit a
valve to a gathering pipe upon which a number of nozzles are situated, and so cut
off that particular pipe with its nozzles entirely from operation during the process
of washing out.
In this case the filter must be provided with a sufficient number of gathering
pipes so as not to leave any part of the filtering medium unwashed.
Dated this 7th day of October 1895.

page_text: COMPLETE SPECIFICATION
Improvements in and connected with Apparatus for Cleansing
Filters.
WILFRED REEVES of 39 Victoria Street, Westminster Loudon S.W. Engineer
and THE REEVES PATENT FILTERS CO LTD. of 39 Victoria Street, Westminster
London SW. Filter Manufacturers, do hereby declare the nature of this invention
and in what manner the same is to be perforined, to be particularly described and
ascertained in and by the following statement :-
Our improvements relate to apparatus for washing out filter beds, and is
applicable to those filters in which the filtrate is collected by nozzles, or strainers
placed underneath the filtering medium, and in which the washing out of the said
medium is effected by causing water to How upwards through the bed.
Whilst it is necessary to have the largest possible area for collecting the filtrate,
it is desirable to reduce this area during the operation of washing out so as to
increase the velocity of the water pissing upwards through the filte! ing medium.
In cari ying our invention into practice we provide a certain number of the sud
nozzles, or stramers A, (Figs 1 & 2) with valves B, (Figs 1 & 2) which allow the
filtrate to flow freely downwards but which automatically close the sand nozzles, or
stramers A, when the water flows upwards for the purpose of washing out the
filtering medium.
The number of uozzles, o stiamers A, to be fitted with these valves B, is
regulated by the pressure of the water available for washing out purposes.
For
example, where the pressure is great it will not be necessary to fit as many nozzles,
or strainers A, with valves B, as where the pressure is stall.
These valves B, may be of any suitable folin, for instance, a ball valve in which
the ball is automatically forced upwards by the water, so as to close the lower
aperture of the nozzle, or strainer A.
In this way we secure a large collecting area for the filtrate, and at the same
time automatically provide an outlet as small as may be desired for the wash out
water.
We may also in place of fitting valve B, to individual nozzles, or strainers A,
fit a valve to a gathering pipe upon which a number of nozzles are situated, and
so cut off that particular pipe with its nozzles, entirely from operation during the
process of washing out.
In this case the filter must be provided with a sufficient number of gathering
pipes so as not to leave any part of the filtering medium unwashed.
Having now particularly described and ascortained the nature of our said
invention and in what manner the same is to be performed, we declare that what
wo claim is.
1st In a filter, a nozzle fitted with a valve which permits the filtered liquid to
flow freely through it but automatically closes when the flow of water is reversed,
substantially as described and for the purposes specified.
2nd. A filter provided with nozzles some of which automatically close when the
flow is reversed substantially as described.
3rd. A nozzle constructed substantially as described with reforeuce to Figures 1
and 2 of the accompanying drawings.
T...L.. 1000
Dated the
day of July 1900.
WILFRED REEVES.
THE REEVES PATENT FILTERS CO., LTD.,
ERNEST COWLAND, Secretary.