An Improved Cover for Tanks for Sewage and similar Material.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
An Improved Cover for Tanks for Sewage and similar Material.
We, HARRY GRIMSHAW, Chemical Manufacturer, Sunny Side, Clayton, Man-
chester, and JOSEPH BARNES, Public Analyst, Marl Bank, Accrington, both in the
County of Lancaster, do hereby declare the nature of this invention to be as
follows:-
In certain processes for the treatment of sewage and other waste liquors it is
found advantageous to exclude light and atmospheric air. In these processes gases
are evolved which it is desirable to enclose or collect. This invention relates to
a new and improved method of effecting these objects and consists in a cover, pre-
ferably of sheet iron, and of such lateral dimensions as will allow it to move up
and down inside the tank. It is constructed with a top and sides, the latter being
preferably vertical, so as to confine the gases which ascend from the material in the
tank. This cover is arranged so as to rise or fall as the gases accumulate in its
interior or escape therefrom respectively. By well known arrangements the
accumulated gases can be removed and utilized or otherwise disposed of, and access
to the interior of the cover may be provided.
Dated this 7th day of March 1898
HARRY GRIMSHAW.
JOSEPH BARNES.
An Improved Cover for Tanks for Sewage and similar Material.
We, HARRY GRIMSIIAW, Chemical Manufacturer, of Sunnyside, Clayton, Man-
chester, and JOSEPH BARNES, Public Analyst, of Marl Bank, Accrington, both in
the County of Lancaster, 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:-
:-
In certain processes for the treatment of sewage and other waste liquors it is
found advantageous to exclude light, and atmospheric air. In these processes,
gases are evolved which it is desirable to enclose or collect. This invention relates
to a new or improved method of effecting these objects and consists in a cover,
preferably of sheet iron and of such lateral dimensions, as will allow it to move
up and down inside the tank, in which the sewage or other waste liquors are con-
tained. The cover is constructed with a top and sides, the latter, preferably vertical,
so as to confine the gases which ascend from the material in the tank. This cover
is arranged so as to rise or fall if desired as the gases accumulate in its interior or
[Price 8d

page_text: escape therefrom respectively. By well known arrangements the accumulated
gases can be removed and utilized or otherwise disposed of and access to the interior
of the cover may be provided.
In order that the nature of this invention may be more easily understood, a suit-
able arrangement of a sewage tank and a cover is shown upon the accompanying
drawing. In this drawing A, A is the cover, B is the manhole C, is the outlet
pipe for the contained gases, D, D, is the sewage tank E, is the inlet pipe for
sewage, and F is the outlet pipe for the same. The direction of the flow of the
gases is shown by the arrows at C and the flow of the sewage by the arrows at E
and F. We do not confine ourselves exclusively to this arrangement, which may
be varied according to circumstances.
Having now particularly described and ascertained the nature and object of our
said invention and in what manner the same is to be performed, we declare that
what we claim is:-
A new or improved cover for a tank or other similar receptacle for sewage or
other waste liquor, so arranged that it is capable of rising or falling as the gases
accumulate in its interior or escape therefrom respectively.
In witness whereof we have hereunto set our hands and seals this Sixth day of
December One thousand eight hundred and ninety-eight.
HARRY GRIMSHAW.
JOSEPH BARNES.