Improvements in Filters.
Year: 1896

page_text: I, HENRY LEWIS DOULTON, of Lambeth Pottery, Lambeth, in the County of
Surrey, Potter, do hereby declare the nature of this invention to be as follows:-
This invention relates to an improvement in the Patent No. 22132% for filters in
which disinfecting or like material is automatically mixed with the water before
filtration.
In the vase or chamber into which the unfiltered water is introduced is a vessel
open at the top and having an opening or openings above its bottom leading into
the vase or chamber. This vessel contains a quantity of soluble material such for
example as permanganate of potash. Since the vessel is open at the top the water
level in it is the same as in the filter so that when water is put into the filter some
of it enters the vessel, and as the water level is lowered a solution of the material
in the vessel runs out and mixes with the unfiltered water in proportion to the
quantity of water poured into the filter. As the openings into the vessel are above
its bottom a quantity of more or less saturated solution remains.
Two filter beds are employed the upper one preferably of iron oxide to arrest
the disinfectant and the lower one being preferably of vegetable charcoal. To
prevent the filtering material being carried away the exit passages are formed of
stoneware screens covered with asbestos cloth.
Preferably the filter beds are contained in separate vases fitting one into the
other.
Improvements in Filters.
I, HENRY LEWIS DOULTON, of Lambeth Pottery, Lambeth in the County of
Surrey, Potter, 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 to an improvement in the Patent No. 221325 for filters in
which disinfecting or like material is automatically mixed with the water before
filtration.
In the vase or chamber a into which the unfiltered water is introduced is a
vessel 6 open at the top at c and having an opening or openings d above its bottom
b
leading into the vase or chamber a. This vessel contains a quantity of soluble
material such for example as permanganate of potash. Since the vessel 6 is open
at the top the water level in it is the same as in the filter a so that when water is
put into the filter some of it enters the vessel b and as the water level is lowered
a solution of the material in the vessel runs out and mixes with the unfiltered water

page_text: in proportion to the quantity of water poured into the filter. As the openings d
into the vessel 6 are above its bottom a quantity of more or less saturated solution
remains.
Two filter beds are employed the upper one e preferably of iron oxide to arrest
the disinfectant and the lower one being preferably of vegetable charcoal f. To
prevent the filtering material being carried away the exit passages are formed of
stoneware screens g covered with asbestos cloth h.
Preferably the filter beds are as shown contained in separate vases fitting one
into the other.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the saine is to be performed I declare that what I
claim is :-
1. The combination with a filter of the vessel 6 with its openings c and d
substantially as described and shown in the drawing.
2. The combination in a filter of a vessel delivering disinfecting or like
material and filter beds of iron oxide and vegetable charcoal substantially as
described.
3. Filters substantially as described and shown in the drawing.
H. L. DOULTON.