Improvements in Traps or Interceptors for Drains.
Year: 1895

page_text: Date of Application, 1st Oct., 1895-Accepted, 2nd Nov., 1895
COMPLETE SPECIFICATION.
Improvements in Traps or Interceptors for Drains.
We GEORGE COUZENS Builder and FRED COUZENS Builder both of 14 Tudor
Road, Cardiff, 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 improvements in the construction of traps or interceptors
for use for drains, and has for its object to provide a simple apparatus which will
effectually prevent any escape of gas, and will also allow easy application of
drain rods.
In carrying out our invention according to one arrangement we employ a casing,
closed at the top by a plate or grid, and connected at the ends with the inlet aud
outlet pipes, conducting the material to the sewers. In this casing and placed
transversely a bridge or division is provided, formed in one piece with the casing
and extending into the cavity at the bottom of the casing commonly filled with
water.
This. bridge thus forms a trap, being sealed by the water held in the bottom
of the casing.
The inlet and outlet ends may be at the same level, or if found preferable,
the outlet end may be slightly lower than the other.
The bridge or division extends horizontally or at a slight angle across the inlet
portion of the casing, thus separating it into two chambers. An opening is
formed in the top of this division or inner wall, and this opening is closed by
means of an iron door secured firmly in position by screws or other means.
This door can be removed for the insertion of the drain rods in the inlet end
of the casing, and below the door above described a hollow ball is placed, serving
as a valve which is commonly open.
A rubber seating is furnished at the inlet end of the trap against which the ball
will fit. This prevents any back wash, as on the water in the trap rising, the ball
will be carried against the seating, and close the opening.
According to a slightly modified arrangement, the division or bridge extends
from the top of the casing, and is curved towards the outlet end. This divides the
casing into two chambers from top almost to the bottom, and two plates are
employed to cover the casing, one at each side, which can be removed for insertion
of the drain rods. The ball may in this case be dispensed with.
According to a further modification, instead of employing a single bridge or
division, two may be furnished, one at each side, separating the casing into two
end chambers, an inlet and outlet, and a central chamber. This arrangement is
especially applicable to gulleys, the casing being provided with a grid, through
which the water runs into the central chamber. A door is secured at each side of
the divisions closing the two end chambers at the top, these doors being removed,
as in other cases for the insertion of the drain rods. A ball and seating may also
be employed in this form of trap if desired, the ball arrangement being placed in
the central chamber.
In order that the invention may be more clearly understood, reference is had to
the accompanying sheet of drawings, in which Fig. 1 is a vertical section of our
improved trap according to one arrangement, and Figs. 2 to 5 are similar views
of modifications.
According to the arrangement shewn in Fig. 1 A is the casing having the inlet
and outlet ends a and a¹ to which the inlet and outlet pipes are attached. The

page_text: cover plate A is fixed on top of this trap in the usual manner. B is the division
or bridge situated at about the middle of the casing, and forming the seal. The
cover plate or door b closes the inlet chamber of the casing, and is removed to
permit of the insertion of the drain rod as shewn in dotted lines.
The drain rod is also shewn inserted into the outlet pipe.
The fresh air inlet a' is placed at the end of the inlet a. In the inlet chamber
the ball C is placed, the seating c being provided to receive it should any back flow
of water occur.
According to the arrangement shewn in Fig. 2 the division B¹ divides the casing
into two chambers from the top, a removable ledge fitting into the top of the
bridge at the centre.
Instead of a single cover being employed as in the previous case for the top of
the casing, two are used, the lower door b being thus dispensed with. The dotted.
lines shew the arrangement of the drain rods, the cover plates A' and ledge b¹ being.
removed to permit of their insertion.
The arrangement shewn in Fig. 3 is very similar to that of Fig. 1, but the ball
and seating are dispensed with, and the fresh air inlet situated near the centre of
the casing.
In Figs. 4 and 5 two divisions B' are employed situated at equal distances from
the centre, forming the central chamber. Two doors bare employed in this
arrangement, one covering each of the end chambers. In Fig. 5 the arrangement
is somewhat similar, but in the central chamber a casing D is furnished in which
the ball C is placed, this casing has the rubber seatings d at top and bottom. The
cover A is in this case preferably in the form of a grid, as this arrangement
is especially adapted for gulleys. The doors are in each case secured by means of
lugs on the casing, through which screws pass.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is :-
(1.) A new or improved trap for drains consisting of a casing separated into two
main chambers by a bridge or division forming a seal, the inlet chamber being
closed at top by a removable cover and furnished with a ball and seating forming
a valve, substantially as described and shewn in Fig 1 of the accompanying
drawings.
.
(2) An improved trap for drains in which the casing is divided into two
chambers by a division or wall extending from the top almost to the bottom,
forming a seal, each chamber being provided with a removable cover, substantially
as described and shewn in Fig. 2 of the drawings.
(3.) An improved trap for drains in which the casing is divided into three,
chambers by means of two divisions forming a double seal, the end chambers being
closed by a removable cover at the top substantially as described and shewn.
in Fig. 4.
(4.) A new or improved trap for drains in which the casing is divided into three
chambers by two vertical walls forming a double seal, and an inner casing
carrying a ball valve placed in the central chamber, substantially as described
in Fig 5:
Dated this 30th day of September 1899.
GEO. H. RAYNER, I .
37, Chancery Lane, London, Agent for the Applicant.