Improvements in Filtering Sewage.
Year: 1893

page_text: The decision of the Comptroller-General of the 27th day of July 1894, allowed;
under Section 18 of the Patents, &o. Act, 1888, an Amendment of this
Specification.
Date of Application; 16th Mar., 1893
Complete Specification Left, 18th Dec., 1893-Accepted, 3rd Feb., 1894
PROVISIONAL SPECIFICATION (AMENDED).
Improvements in Filtering Sewage.
We, BANKS RUSHFORD, M.S.E., of Hazledean, Cargate Avenue, Aldershot, in
the County of Hants, Surveyor to the Local Board, and JOHN EDWARDS, of The
Sewage Works, Ash Road, Aldershot, in the same county, Sewage Works
Manager, do hereby declare the nature of this invention to be as follows:
Our invention relates to improvements in filtering sewage.
The crude sewage is led into precipitating tanks, and there treated with lime,
ferric aluminate and ferric sulphate. These tanks may be of the ordinary
construction.
The sewage water from the precipitating tanks is passed through the improved
filter. This is constructed as follows. As to the casing, it may be of any impervious
and otherwise suitable material. Upon the bottom of the casing the filtering media
next specified are laid in the order stated.
1st layer. About 9 inches of clean washed gravel.
*2nd
"
"
6 inches of clean washed shingle.
3rd.
3 inches of clean washed sand.
"
"3
: 4th
"
"
5th
"
"
6 inches of unwashed small slag, small coal, coal dust and
Ecreenings in equal proportions.
6 inches of clean washed sharp sand.
E
The above materials may be varied to some extent, but it is chiefly upon the
mineral products of the slag and coal, and their oxidising properties, that
we rely.
The filter constructed as above described is cleaned by taking off the top layer,
viz., the sand, and washing it well. After it has been washed clean, it is fit for use
Again.
The improved filters may be constructed in series. A square foot yard of surface
is capable of filtering about 2,500 gallons in 24 hours.
⚫ Dated this 16th day of March 1893.
PHILLIPS & LEIGH,
Agents for the Applicants.
PHILLIPS & LEIGH,
Agents for the Applicants.
COMPLETE SPECIFICATION (AMENDED).
Improvements in Filtering Sewage.
We, BANKS RUSHFORD, M.S.E., of Hazledean, Cargate Avenue, Aldershot, in
the County of Hants, Surveyor to the Local Board, and JOHN EDWARDS, of The
Sowage Works, Ash Road, Aldershot, in the same county, Sewage Works
[Price 8d.]

page_text: Manager, do hereby declare the nature of our invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
Our invention relates to improvements in the means for filtering sewage, and
consists in improvements in the composition and arrangement of the layers of the
filtering bed:
In order that the invention and the manner in which its benefits are to be secured,
may be thoroughly understood, we will now describe it in detail, referring in 80
doing to the accompanying drawing which is to be taken as part of this Specification
and read therewith. It is a sectional elevation illustrating a filtering bed embodying
the present invention.
The crude sewage is led into precipitating 'tanks and there treated with Gibb's
alumina or any other precipitating agent selected according to its suitability for the
water of the particular district in question..
The sewage water is passed' 'from the precipitating tanks into the filter, the
respective layers of which are as follows, commencing with the bottom one.
PHILLIPS & LEIGH,
22, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicants.