IMPROVEMENTS IN SEWER-GAS INTERCEPTORS FOR DRAINS
Year: 1884

page_text: I, WALTER JOHN HINITT, of Beech Grove, Court Road, Erdington, Warwick-
shire, Contractor's Manager, do hereby declare the nature of my invention for
"IMPROVEMENTS IN SEWER-GAS INTERCEPTORS FOR DRAINS "
to be as follows:―
My Invention relates to Improvements in that class of sewer-gas interceptors
for drains which consist of a pipe made of earthenware or other suitable material
and generally of circular cross section, the inlet and outlet to such pipe being
horizontal or nearly so when in use and in the same line. The said pipe is formed
with a U shaped depression in which part of the liquid is trapped on its way to
the main drain or sewer and, as the top of the bend of the U shaped part is below
the bottom of the outlet, the back passage of foul air through the drain iş
intercepted.
Such sewer-gas interceptors often become choked through sediment collecting at
the bottom of the U shaped part and are the found difficult to clean.
The objects of my Invention are to provide, in combination, means whereby such
Bower-gas interceptors can be readily cleansed and the drain ventilated.
In carrying my Invention into practice I form with such a sewer-gas interceptor
as above described, about centrally with the U shaped part and on the top side
thereof, a chamber. I make the said chamber preferably of a cylindrical form and
of the same diameter as the inlet and outlet pipes but it may be rectangular or of
other convenient form. Above the chamber. I carry an extension vertically to any
desired height such as the ground line and close it with a cover or grating. The
line of meeting of the said chamber and the U shaped part is below the bottom
of the outlet pipe, so that, when in use foul air can neither escape from the outlet
pipe into the said chamber and vertical extension nor into the inlet pipe.
It will be seen that by means of the chamber and vertical extension access can
readily be had to the U shaped part and any accumulation therein can be readily
removed.
I form a passage from the side of the said chamber near the top to the top of
the inlet pipe for the purpose of ventilating the drain, by allowing fresh air to
descend the vertical extension and after passing along the drain to ascend the
ordinary air pipe provided at the other end.
I make my Improved sewer-gas interceptors of glazed earthenware or of other
suitable material as sewer-gas interceptors are now ordinarily made.

page_text: .
I, Walter John HINITT, of Beech Grove, Court Road, Erdington, Warwick-
shire, Contractor's Manager, do hereby declare the nature of my invention for
IMPROVEMENTS IN BEWER-OAS INTERCEPTORS FOR DRAINS" and in what manner
the same is to be performed, to be particularly described and ascertained in
and by the following statement, referenco being had to the accompanying Drawing
and to the letters and figures marked thereon, that is to say:
My Invention relates to Improvements in that class of sewer-gas interceptors for
drains which consist of a pipe made of earthenware or other suitable material and
generally of circular cross-section the inlet and outlet to such pipe being horizontal
or nearly so when in use and in the same line. The said pipe is formed with
a U shaped depression in which part of the liquid is trapped on its way to the
main drain or sewer and, as the top of the bend of the U shaped part is below
the bottom of the outlet, the back passage of foul air through the drain is
intercepted.
Such sewer-gas interceptora often become choked through sediment collecting at
the bottom of tho U shaped part and aro then found difficult to clean.
The objects of my Invention are to provide, in combination, means whereby
such sewer-gas interceptors can be readily cleansed and the drain ventilated.
Fig. of the accompanying drawing represents in aide elevation and Fig. 2
in plan a sewer-gas interceptor constructed in accordance with my Invention
and Fig. 3 is a sectional elevation of the same shewing also its application to a
drain.
The same letters of reference indicate the same parts in all the Figures.
In carrying my Invention into practice I form with such a sewer-gas interceptor
as above described, about centrally with the U shaped part A and on the top side
thereof, a chamber B. I make the said chamber B preferably of a cylindrical
form and of the same diameter as the inlet pipe a and outlet pipe a' but it may
Above the chamber B I carry an
be rectangular or of other convenient form.
extension vertically to any desired height (for instance by a pipe Ons shown by the
dotted lines) such as the ground line D and close it with a cover or grating E. The
line of meeting of the said chamber B and the U shaped part A is below the
bottom of the outlet pipe a', so that when in use foul air can neither escape from
the outlet pipo a into the said chamber B and vertical extension Cnor into the
inlet pipe a¹..
It will be seen that by means of the chamber B and vertical extension C access
can readily be had to the U shaped part A and any accumulation therein can be
readily removed.
I prefer to provide at the bottom of the chamber B where the said chamber
opens into the U shaped part A a stopper or cover F provided with a loop for
other means for its reinoval from the grating E. The object of the cover F is
two-fold; firstly, it prevents any dust and rubbish which fulls through the grating E
entering the U shaped part A as such dust or rubbish would fall on to the cover F
and could be readily removed therewith and, secondly, it prevents the liquid matter
which enters by the inlet a from rushing up into the chamber B and so interfering
with the casy flow of such liquid through the outlet a².

page_text: I form a passage G from the side of the said chamber. B near the top to the
top of the inlet pipe a¹ for the purpose of ventilating the drain, by allowing
fresh air to descend the vertical extension C and to enter the inlet pipe a' by
the said passage F and so after passing along the drain in the direction
shewn by the dotted arrows to ascend the ordinary air pipe provided at the
other end.
I prefer to make the bottom of the inlet pipe a¹ about 3 inches more or
less higher than the outlet pipe a² so as to obtain a greater fall to the
depression A thereby increasing the velocity of the flow of the liquid through
the interceptor.
I make my Improved sewer-gas interceptor of glazed earthenware or of other
suitable material as sewer-gas interceptors are now ordinarily made.
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
The improvements in sewer-gas interceptors for drains herein before described
and illustrated in the accompanying drawing, that is to say, the combination of an
open chamber B over and connected with the U shaped part A, for facility of
cleaning out the U shaped part A, with a passage G, connecting the chamber B
with the inlet a¹ of the interceptor for admitting air into the drain for ventilation
all substantially as described and illustrated.
D
00 1 1
T
1000