Improvements in Apparatus for Trapping, Ventilating, and Inspecting Sewer and Drain Pipes in Houses and other Buildings.
Year: 1892

page_text: Date of Application, 28th Nov., 1892-Accepted, 21st Jan., 1893
COMPLETE SPECIFICATION.
Improvements in Apparatus for Trapping, Ventilating, and Inspecting
Sewer and Drain Pipes in Houses and other Buildings.
I, ROBERT FREDERICK DAMPIER, of Dundonald Villa, Stoke Devonport, in
the County of Devon, Surveyor, 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 :-
My invention relates to improvements in apparatus for trapping, ventilating and
inspecting sewer and drain pipes in houses, mansions and other private dwellings or
public buildings.
These improvements consist in placing between the inlet pipe from the house or
building and the outlet pipes to sewer, an apparatus having for its object to trap
the sewerage on its way from the house to the main sewer in the streets, so that no
foul gas may escape from the sewer into the house drains.
The sewerage is promptly conveyed from the inlet to the outlet.
This apparatus has the form of a manhole and intercepter combined, access.
to which may be readily obtained for the purpose of inspecting the drain pipes
and clearing them when necessary. Hitherto such manholes and intercepters, or
the greater part of them, have been made of brickwork and cement and these
portions get impregnated with the sewerage, more or less, as it is impossible to
keep them clean-moreover they are expensive to build up.
My improved apparatus which is made of stoneware glazed on the inside, fully
remedies these defects and being formed of three detachable parts or sections
can be readily put together and will keep itself clean.
In the accompanying drawings, in which like letters of reference indicate
corresponding parts,
Figure 1 is a vertical section on line A. B. of Figure 3.
Figure 2 is a vertical section on line C. D. of the same.
Figures 3 and 4 are plans of the lowermost and uppermost sections respectively
of the apparatus.
Figure 5 is a plan of a modification.
Figures 1 and 2ª are details.
My improved apparatus consists of three sections a. b. c. the two sections b. c.
being furnished with flanges s to receive the lower edge of the section above and
the joints formed by means of Portland cement. The uppermost section a is pro-
vided with a four inch opening and connection for an inlet pipe with mica valve
for ventilating purposes..
When the air-tight cover G to manhole is used, in most cases the four inch
opening and connection for ventilating pipe h may be dispensed with and a galva-
nized iron grating (Fig. 4) provided to replace the airtight cover.
This answers
as an inlet of air which goes down the manhole and through the inlet pipes p and
through the drains and ventilating pipes to top of building and thus form a continuous
circulation of fresh air.
The intermediate section b is merely a cylindrical piece furnished with a flange s
at the top.
Where only a shallow manhole or intercepter is required, this section may be
dispensed with but when on the contrary the drain pipes are very deep, the manhole
can be extended by means of the lengthening shaft shewn in Figures 1ª and 2ª.
The lowermost section c comprises a syphon of special construction at one
side e. f. g. closed by a lid leading to main sewer pipe q and at the other side
a channel r leading to the drain from the house waterclosets or other drain inlet
pipes p.

page_text: The channel pipe r may be sub-divided into three inlets r. r. r. as shewn in
Figure 5. Water is placed in the syphon at g so that its level is above the
deflecting plate e. The sewerage coming well flushed through the inlets p passes
in the direction of the arrows under the plate e and through the water in the
syphon into the main sewer pipe 9, the return of foul gases being prevented
by the lid d and the water in the syphon g.
To clear or clean the sewer pipes this syphon is specially made for the purpose.
The coverplate G is removed by the operative who descends in the manhole
and on his removing the lid d gains access to the syphon and sewer, when a
drain sweeping machine can be pushed through the sewer pipes to main sewer in
street.
The machine can be likewise pushed through the inlet pipes p, house drains,
waterclosets and other pipes, thus removing any obstruction without putting up the
drains, as is usual in the choaking of drains.
Having thus 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 improved apparatus for trapping, ventilating and inspecting sewer and
other drain pipes, arranged and constructed substantially as herein described and
shewn.
2. Forming the manholes used for inspecting sewer pipes of detachable sections
of glazed stoneware and providing the lowermost section with a syphon to prevent
the foul gases from returning from the main sewer, substantially as herein described
and shewn.
Deted this 28th day of November 1892.
HUGHES, ELI & HUGHES,
76, Chancery Lane, London, W.C., Agents for Applicant.