Improvements in Drain Traps and Inspection Chambers.
Year: 1894

page_text: Date of Application, 24th Sept., 1894
1007
1005
Date of Application, 24th Sept., 1894
Complete Specincation Left, 30th Jan., 1895 Accepted, 9th Mar,
4005
7500
PROVISIONAL SPECIFICATION.
Improvements in Drain Traps and Inspection Chambers.
We, GEORGE COUZENS and FREDERICK COUZENS of 14, Tudor Street, Cardiff,
Builders, do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved trap and inspection chamber for house
drains, and is intended to provide a simple and inexpensive arrangement which can
be easily fixed in position and opened for inspection.
In carrying out our invention we employ a casing of suitable shape, fitted at one
end to the pipe proceeding from the house, and at the other end to the sewer pipe.
Across the middle of this casing, a transverse sloping ledge is cast sloping towards
the sewer end and dividing the casing into two parts. The lower portion of the
casing along with this sloping ledge forms a water seal, the lower side of the ledge
The division of the casing next the sewer
projecting below the level of the water.
pipe is closed by a door fitted on top of a ledge formed in the casing and the
central partition, and fixed by means of screws passing through lugs on the inner
side of the casing. This serves as an inspection door which can be removed when
it is desired to inspect the drain, and the division formed by the ledge or partition
serves as a Y piece through which access can be had to the sewer pipe.
The other division in the casing is provided with a copper float ball, and a
seating formed by a ring fixed in a similar manner to the inspection door and in
line with it, the door and seating being fitted in a sloping position. Thus should
there be any back wash, the ball will immediately be raised by the water and will
close the aperture.
The top of the casing is provided with an iron cover which can be lifted when
desired admitting to the casing and trap, and permitting the house pipe to be
cleared when necessary.
Dated this 24th day of September 1894.
GEO. H. RAYNER,
37, Chancery Lane, London, W.C., Agent for the Applicants.
Improvements in Drain Traps and Inspection Chambers.
We, GEORGE COUZENS and FREDERICK COUZENS, both of 14, Tudor Street,
Cardiff, Builders, 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 :-
This invention relates to an improved trap and inspection chamber for house
drains and is intended to provide a simple and inexpensive arrangement which can
be easily fixed in position and opened for inspection.
In carrying out our invention, we employ a casing of suitable shape fitted at one
end to the pipe proceeding from the house and at the other to the sewer pipe.
Across the middle of this casing a transverse sloping ledge is cast sloping towards

page_text: the sewer end and dividing the casing into two parts. The lower portion of the casing
along with this sloping ledge forms a water seal, the lower side of the ledge
projecting below the level of the water. The division of the casing next the sewer
pipe is closed by a door fitted on top of a ledge formed in the casing and the
central partition and fixed by means of screws passing through lugs on the inner
side of the casing. This serves as an inspection door which can be removed when
it is desired to inspect the drain and the division formed by the ledged partition
serves as a Y piece through which access can be had to the sewer pipe.
The other division in the casing is provided with a copper float ball and a
seating formed by a ring fixed in a similar manner to the inspection door and in
line with it, the door and seating being fitted in a sloping position. Thus should
there be any backwash the ball will immediately be raised by the water, and will
close the aperture.
The top of the casing is provided with an iron cover which can be lifted when
desired admitting to the casing and trap and permitting the house pipe to be cleared
when necessary.
In order that our invention may be more readily understood reference is made
to the accompanying drawings in which Fig. 1 is a longitudinal section of a trap
constructed in accordance with our invention and Fig. 2 is a modification thereof.
The casing or body A of the trap is preferably of glazed earthenware having an
opening at the top provided with a metallic or other plated cover B which fits said
opening and rests on a ledge formed around the same.
The body A is divided in its lower part by a transverse diaphragm C into two
compartments or chambers D and E the former of which has an inlet a socket to
which the house drain d is connected and the latter E a similar outlet e leading to
the sewer.
The diaphragm C is formed integral with the body of the trap and inclines
downwards towards the lower sewer end, the lower edge being immersed in the
fluid contained in the bottom of the trap forms a water seal thereby preventing
the passage of the sewer gas into the house.
The chamber E of the trap adjacent to the sewer is closed at the top by a
plate F which rests on a ledge formed on the inner face of the body of the
trap and continued across the top of the diaphragm as shown. The other
chamber D contains a hollow sphere G preferably of copper which floats on the
surface of the liquid contained in the bottom of the trap. The mouth of this
chamber has fitted thereto a metallic ring H which is in alignment with the
plate F before mentioned and rests on a similar ledge within the body of the
trap and across the upper edge of the diaphragm. The said ring has attached
to it on its under side by means of screws an annular ring of rubber or other
flexible material 1.
The top plate or cover B, the inner plate F, and the annular ring H just
described are each secured in position by means of screw bolts i passing through
the substance of the plate, the said bolts being provided with lugs or nuts j fitting
in dovetail sockets k formed in or upon the inner faces of the trap, so that the
plate may be firmly and readily attached to their respective seatings. A bedding
of rubber, red lead, or other suitable substance may be inserted beneath the plates
if required to form an hermetically sealed joint.
An opening J is provided in the upper part of the trap to which a ventilating
pipe may be attached or it may be closed by a cap or plug of any suitable
description when the said pipe is not required.
It will thus be seen that sewage from the house drain has a clear passage through
the trap in the direction of the arrows shewn in the drawings, but should any
sudden inrush of water into the sewer take place causing a back flow into the trap
the copper ball will rise into position shewn by the dotted line thus preventing the
passage of the water into the house drain and the consequent overflow which
frequently happens from this cause.
Further should any obstruction take place either in the sewer outlet or house

page_text: drain access is readily obtained to the interior of the trap by the removal of the
top plate B and plate F when a clearance can be readily effected in the usual
manner. This form of trap can be adapted for use in combination with the pan of
an ordinary wash out closet the lower part of the said pan being fitted with an
annular ring of rubber in a similar manner to that before described which serves
to prevent the rising of a copper ball contained. in that part of the trap beneath
the pan, the action of the apparatus being similar to that before described.
The modification illustrated in Fig. 2 is intended to be used in situations
where a back flow of sewage is not likely to occur. It resembles the form shewn
in Fig. 1, except that the spherical ball contained in the chamber D together with
its seating is dispensed with, the central diaphragm C being carried up to the top
of the trap where it forms a support for the top plate B which is in two portions to
cover the openings of the chambers D and E respectively.
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.) A trap or gully having two compartments or chambers therein, formed by
a central inclined diaphragm, a plate or cover to the chamber adjacent to the sewer,
a spherical float and a seating therefor in the other chamber and a cover or plate
fitted to the top of the said gully the whole being combined and arranged,
substantially as described and illustrated.
(2.) In an improved trap and inspection chamber for drains, the combination
with two compartments, formed by a central sloping division in the chamber,
a ball float in one of the said compartments, and an annular seating for the
said ball, of a detachable cover to the other chamber, fastened by means of screws
and lugs on the inner side of the said chamber, substantially as described and for
the purposes specified.
(3.) In an improved trap and inspection chamber for drains, the combination
of a central sloping partition dividing the apparatus into a trap on the one side,
and an inspection chamber on the other, of a ball float in the trap, a ring at the
top forming a seating for said ball, fastened by screws and lugs on the inner face of
the trap, and a door or cover for the inspection chamber also fixed by screws and
lugs, substantially as described and for the purposes set forth.
(4.) The improved trap and inspection chamber for drains, constructed and
operating substantially in the manner described and shown in the accompanying
drawings and for the purposes specified.
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GEO. H. RAYNER,
37, Chancery Lane, London, W.C., Agent for the Applicants.