Improvements in Apparatus for Ventilating Sewers.
Year: 1890

page_text: Date of Application, 15th July, 1890
Complete Specification Left, 15th Apr., 1891-Accepted, 16th May, 1391
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Ventilating Sewers.
THOMAS DOUGLAS, of Abbotsford, Underhill Road, S.E. Engineer do hereby
declare the nature of this invention to be as follows:-
A chamber or box containing rotatory fans or arms, is connected by means of
pipes or other conduits to the upper part of the sewer. These fans, being made to
rotate, draw the gases from the sewer, and by means of an exit pipe, force them
through a specially constructed chamber or vessel; containing disinfectants, from
which they are passed up a shaft into the open air.
Other exhaust apparatus may be used instead of, or in addition to, the fans
abovementioned, and a furnace may be substituted for the disinfecting apparatus.
Dated this 15th day of July 1890.
THOS. DOUGLAS.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Ventilating Sewers.
I THOMAS DOUGLAS of Abbotsford, Underhill Road, 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:
The object of this invention is to provide for the withdrawal from the sewers of
towns and villages, of the gases produced by the decomposition of the matters
passing through the sewer, and also for the disinfecting and deodorising of the said
gases.
In carrying out this invention, I close all the openings now provided for
ventilating the sewer, and I adapt, at one or more parts of the system of sewer, an
exhausting apparatus by which the gases will be drawn off from the sewer.
These gases are then passed through a chamber containing disinfectants or
deodorants, and arranged to provide for the gases a zigzag course, whereby they
will be caused to pass two or more times through the disinfectant or deodorant,
before they pass into the air through a shaft or otherwise.
In the accompanying drawing I have shown an arrangement of apparatus suitable
for the purposes of my invention.
Fig. 1 represents a general view of the apparatus, partly in section, and Fig. 2 is
a plan view of the disinfecting chamber, with the cover removed.
A is the sewer, and B is a pipe leading from the crown thereof, and connecting it
with an exhauster C. This exhauster may be of any suitable construction, and its
outlet is connected by a pipe D with a disinfecting or deodorising chamber E.
This chamber consists of a rectangular box having a transverse vertical partition
or partitions a, a cover b, and baffle plates or deflectors c, cast with or otherwise
secured to the box E.
The disinfectant or deodorant employed is preferably a liquid, and the baffle
plates e dip below the surface of the liquid.
At the level of the top of the liquid, I place perforated plates d (see Fig. 2), of
wood or other suitable material, which, while permitting the passage of the gases,
will prevent the liquid splashing about in the chamber, and will also serve to
equalise the pressure of the forced gases on the surface of the liquid.
The partition a may have openings at its lower part, so that the
liquid may be maintained at the same level in both compartments,
height of the
Openings are
TD 037

page_text: also made in the upper part of the partition a, to permit the passage of the gases,
the direction of travel of which is indicated by the arrows.
The chamber E may be connected with a shaft which will conduct the disinfected
and deodorised gases some height into the air.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :
The means barain chamn and decoxibad for wantilation an