A COMBINED STENCH TRAP AND SEWER VENTILATOR
Year: 1877

page_text: LETTERS PATENT to John Abram Lonsdale, of Leeds, in the County of York,
Sanitary Inspector, for the Invention of "A COMBINED STENCH TRAP AND
SEWER VENTILATOR."
Sealed the 21st August 1877, and dated the 24th February 1877.
PROVISIONAL SPECIFICATION left by the said John Abram Lonsdale at the
Office of the Commissioners of Patents on the 24th February 1877..
JOHN ABRAM LONSDALE, of Leeds, in the County of York, Sanitary Inspector.
"A COMBINED STENCH TRAP AND SEWER VENTILATOR."
In the manufacture of my Invention I purpose using glazed earthenware or
stoneware.
The body of the trap consists of a chamber or reservoir with two inlets (or more
if necessary) on opposite sides of the chamber.
In one of the other sides of the chamber I place the outlet to the street drain or
sewer, and on the side opposite I place an inlet for the caves water from the fall
spout.
The outlet to the street drain or sewer and the inlet from the fall spout I connect
with a covered channel or a square or circular pipe, open or partly so on the under
side. This opening is to allow for the passage of sewage from the house drains into
the sewer outlet. The sides of the connecting pipe I allow to dip sufficiently
below thewater line in the chamber to act as a trap to the inlets from the house
drains.
Further, the water line in the chamber being also the water line in the con-
necting pipe there is a free passage direct from the main sewer to the fall spout by
which all sewer gases can escape, thus effectually preventing pressure of sewer gases
in the trap. The trap may be covered either with a loose lid or grate.
Two or more houses may be connected to one trap as may be thought desirable.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Abram Lonsdale in the Great Seal Patent Office on the 24th
August 1877.
.
JOHN ABRAM LONSDALE, of Leeds, in the County of York, Sanitary Inspector.
"A COMBINED STENCH TRAP AND SEWER VENTILATOR."
This Invention relates to a novel construction of stench trap which provides for
the ventilation of house and street drains, while at the same time the internal

page_text: house drainage and the water from the roof has a free and uninterrupted passage
through the trap to the street sewer.
In carrying out these objects I connect the rain water pipe with the trap and
use it as a ventilating shaft. Free access is permitted to the trap to remove any
accumulation of solid matters, and if desired that trap may be so arranged as to
receive the surface water on its way to the street drains.
In the accompanying Drawing Figure 1 shows in plan view, and Figure 2 in
vertical longitudinal section taken in the line X, X, a stench trap constructed
according to my Invention, and suited for receiving the drainage of two houses;
Figure 3 is an end view of the same, and Figure 4 is a cross section taken in the
line Y, Y, of Figure 1.
The trap I prefer to construct of glazed earthenware or stoneware and with a
closed cover of the same material; but when in lieu of a closed cover the trap is
fitted with a grating that may for the purpose of increased strength be formed of
cast iron.
The trap consists of a box A, rectangular in plan view, but tapering inwards
slightly on all sides towards it bottom. Fitted to the interior of the box, and
transversely of the same, is a channel B, closed at its upper part and open at bottom.
The sides of the box parallel to this channel are formed with sockets C, C, to which
are fitted the drain pipes from the house or houses intended to be trapped.
The sides of the box to which the channel is attached are formed with sockets D
and E, which connect with opposite ends of the channel. Into the socket D fits a
pipe that connects with the street drain, and into the socket E fits a water pipe
leading from the roof of the house.
The water level maintained in this trap will be at or near the line 1, 1, Figures 2
and 4, and thus the lips of the channel will be sealed. By this means any sewer
gas entering the trap by the socket D will be prevented from passing out at the
inlets C, C, but will escape by the socket E up the rain water pipe into the air;
F is the trap cover, which, whether in place or not, does not affect in any way the
efficient action of the trap. When therefore a grating is substituted for this close
cover, the trapping of the house drains will remain as efficient as before.
A. modification of the stench trap is shown at Figures 5, 6, 7, and 8. In this
case there is but one inlet socket, and one side of the case A forms the side of the
channel B. In other respects the two arrangements are identical, and the same
letters of reference being used to point out the like parts, no further description
will be required.
Having now set forth the nature of my Invention of a combined stench trap and
sewer ventilator, and explained the manner of carrying the same into effect, I wish
it to be understood that under the above in part recited Letters Patent I claim,
constructing stench traps, as above described, with a covered channel which
connects at its ends the outlet or street drain with a ventilating shaft, such channel
forming also a passage for the drainage and being capable of being sealed by the
outlet waters, as and for the purpose above explained.
In witness whereof, I, the said John Abram Lonsdale, have hereunto set my
hand and seal, this Twenty-second day of August, One thousand eight
hundred and seventy-seven.
JOHN ABRAM LONSDALE. (LS.)
Signed, sealed, and delivered by
the said John Abram Lonsdale,
in the presence of
EDWARD WHITELEY,
Clerk to Mr. Thomas Turner,
Solicitor,
Leeds.