Year: 1898

page_text: JOHN MORGAN, Sunnybank, Pontardawe, Swansea, Surveyor, do hereby declare
the nature of this invention to be as follows;
--
A small chamber is to be constructed adjoining an airtight sewer manhole,
and covered over by a grate. A pipe, in the form of the letter U,-but with the
ends bent outwards, and having one arm or upright longer than the other, is
fixed against the inside of the manhole wall; with the bent end
of the longer arm or upright, laid through and rendered firm and
solid in the wall between the manhole and chamber, leaving the said wall
perfectly airtight. The lower portion of this U shaped pipe is to be extended
into the benching to the level of the centre of the sewer, the whole arrangement
to form an air-inlet tube to the sewer, the air finding its way to the tube through
the grate.
A regulating slide valve is to be fixed in the wall at the mouth of the air-inlet
tube; and a dirt-box will be placed at the bottom of the chamber to receive road
grit &c.
The advantages are as follows:-
1. Air can pass through the grate and inlet pipe into the sewer thus venti-
lating it, and diluting the gas before it escapes into the atmosphere through the
vent shafts which should be connected with every fourth or fifth manhole or as
circumstances will allow.
2. No gas can escape from the sewer through the U shaped inlet pipe, as it
cannot pass through the lower or curved portion, which lies below the level of
the soffit of the arch of the sewer.
3. The quantity of air to be admitted into the sewer, can be regulated by the
slide valve.
Dated this 25th day of Auril 1908
I, JOHN MORGAN, of Sunnybank, Pontardawe, Swansea, Surveyor, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
My invention relates to an air-inlet for the ventilation of sewers.
In the accompanying drawing a small chamber j is to be constructed adjoin-

page_text: ing an air tight sewer manhole b, and covered over by a grate i and built on a
stone landing e A pipe c, in the form of the letter Ů, but with the ends bent
outwards, and having one arm or upright longer than the other,--is fixed against
the inside of the manhole wall, with the bent end of the longer arm or upright,
laid through and rendered firm and solid in the wall between the manhole b
and chamber j, leaving the said wall perfectly airtight. The lower portion
of this shaped pipe is to be extended into the benching to the level of the
centre I of the sewer f, the whole arrangement to form an air-inlet tube to the
sewer, the air finding its way to the tube through the grate.
A regulating slide valve is to be fixed in the wall at the mouth of the air-
inlet tube; and a dirt-box d will be placed at the bottom of the chamber j to
receive road grit etc.
The manhole is erected on a concrete foundation h and is provided with a
cover a at the top.
The advantages are as follows:-
1. Air can pass through the grate and inlet pipe into the sewer, thus venti-
lating it, and diluting the gas before it escapes into the atmosphere through the
vent shafts, which should be connected with every fourth and fifth manhole or as
the circumstances will allow.
2. No gas can escape from the sewer through the U shaped inlet pipe, as it
cannot pass through the lower or curved portion, which lies below the level of
the soffit of the arch of the sewer.
3. The quantity of air to be admitted into the sewer, can be regulated by the
Jide valve.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. The air-inlet for the ventilation of sewers substantially as above described
in this specification and illustrated in the accompanying drawing.
2. In ventilating sewers, the combination and arrangement of the various parts
substantially as described in the above specification and illustrated in the accom-
panying drawing.
1
DEL 1
T
1900