Improvements in the Composition and Manufacture of Filtering Material.
Year: 1895

page_text: Date of Application, 20th Nov., 1895
Complete Specification Left, 12th Aug., 1896-Accepted, 3rd Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in the Composition and Manufacture of Filtering
Material.
I ALFRED SMITH 6 Alderton Road Camberwell S.E. Engineer do hereby
declare the nature of this invention to be as follows:-
This invention has for its object improvements in the composition and manufacture
of filtering blocks or plates used for purifying water, in such a manner that the
material is sufficiently porous to admit of water pissing through it with or without
pressure while being sufficiently close in texture as to prevent the passage of any
bacteria or germs which may be present in the water to be passed through it, the
filtrate being thus rendered sterile.
My improvements consist in mixing suitable proportions of Portland or Roman
cement and kieselguhr with water and pressing or moulding the mixture into
blocks or plates of any desired shape and size suitable for fitting into open or closed
filter cases in any convenient manner.
Dated this 20th Inn of Nanamba 1008
Improvements in the Composition and Manufacture of Filtering
Material.
ALFRED SMITH 6 Alderton Road Camberwell S.E. 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 has for its object improvements in the composition and manufacture
of filtering blocks or plates for purifying water, in such a manner that the material
is sufficiently porous to admit of the water passing through with or without
pressure, while being sufficiently close in texture t prevent the passage of bacteria,
germs, or other minute matters held in suspension in the water to be filtered
though such blocks or plates, the filtrate being rendered sterile thereby.
My improvements consist of using & mixing suitable proportions of kieselgubr
and Portland or Roman cement, or hieselguhr and Portland and Roman cements,
with water or other suitable liquid, and pressing, moulding, or forming by any
other convenient mean, such mixture into blocks or plates of any desired shape
and size suitable for fitting into open or clo-ed cases vessels chambers or frames
in any convenient manner, or the compositin or mixture as described may be
laid over blocks or plates of any coarser material of a suitable nature and such
blocks or plates may be either solid or hollow ard of any desired shape & size,
and being the foundation or support for the outer coating or layer of kieselguhr
and cement, which may be of any desired thickness, and which forms the filtering
medium.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to he performed, I declare that what I
claim is :-
1. The composition consisting of the mixture of kieselguhr, Roman or Portland
cement, and any suitable liquid.
2. The composition consisting of the mixture of kieselguhr, Roman and Portland
cements, and any suitable liquid.
3. The construction of filtering blocks or plates composed of the mixture of
kieselguhr, Roman or Portland cement, and any suitable liquid, or of kieselguhr,
Roman and Portland cements, and any suitable liquid.
4. The construction of filtering blocks or plates, the surfaces of which consist of
a coating or layer of the composition consisting of the mixture of kieselguhr,
Roman or Portland cement and any suitable liquid, or of kieselguhr, Roman and
Portland cements, and any suitable liquid,-and the inner part of any suitable
material of a sufficiently coarse or porous nature.
Dated this 12th day of August 1896.
ALFRED SMITH.