Improved Drain Trap.
Year: 1893

page_text: Date of Application, 8th June, 1893
Complete Specification Left, 8th Mar., 1894-Accepted, 5th May, 1894
PROVISIONAL SPECIFICATION.
Improved Drain Trap.
JOHN CARTER High Street Cosham Hants District and Road Surveyor, do
hereby declare the nature of this invention to be as follows:-
To produce a trap which will effectually prevent the escapes of sewer gas from
drains, soil pipes, yard traps and gullies, street gullies, cesspits etc. and at the same
time one which is easily accessable and can be cleaned out if any deposit or sediment
should accumulate.
The trap consists of a watertight chamber made of cast iron, glazed stoneware,
earthenware, or brickwork at one end of which the fluid enters and passing through
the length of the chamber escapes at the outlett at the opposite end.
In the chamber are 2 seals or 4 lips constructed of cast iron, slate, stoneware, or
other suitable material.
For the purpose of forming a double seal two lips are placed at the top and two
at the bottom.
The two upper lips are made to project downwards about 2 inches below the
top of the bottom lips and so form a seal which prevents any gas which is generated
in the drain, from escaping at the inlet of the trap.
The top part of the two upper lips and likewise the top of the chamber is formed
with a double rebated channel which is filled with grease-water, glycerine or
oil; the tongue attached to the under side of the cover fits into this channel & is
so rendered air and gas tight.
On the outlett of the trap is constructed an arm or junction for relieving the
pressure of gas on the seals if required.
TL 1000
JOHN CARTER.
Improved Drain Trap.
I JOHN CARTER Road Surveyor High Street Cosham Hants 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:-
To produce a trap as shewn on Sheet 1-Figs. 1, 2, 3, 4 & 5, which will
effectually prevent the escape of sewer gas from drains, soil pipes, yard traps,
gullies, street gullies, cesspits &c. and at the same time one which is easily
accessible, and can be cleaned out if any deposit or sediment should accumulate.
The trap consists of two watertight chambers made of iron, glazed stoneware,
earthenware, stone, slate, brickwork or other suitable material at one end of which
the fluid enters and passing through the length of the chambers escapes at the
outlet A. at the opposite end as shewn by the arrows.
In the chambers are three divisions B. C. D (Figs. 1, 2, 4 & 5) constructed of
iron, slate, stoneware or other suitable material, which form a double water seal.
The centre division C is permanently fixed while the other divisions B & D can
be fixed or made to slide in grooves at the sides of the chambers to further facilitate
cleaning and cleansing, which grooves are hermetically sealed with a composition
of red lead putty or plastic cement.

page_text: The cover E (Figs. 2 & 3) is made in two moveable portions, the portion E' is
provided with a dowell F which fits into a mortise G just above outlet A (Fig. 2).
The remaining portion of cover has longitudinal perforations forming a grating
and is provided with lock and key H (Fig. 2 & 3). On underside of portion E' of
cover is a tongue K which accurately fits into the groove L in the upper portion
of the chambers, supporting the cover, the groove L being filled in with grease-
water, glycerine, oil, or other material, so as to afford an air and gas tight seat for
the cover E¹.
On the outlet pipe A a junction piece J is formed to ventilate the drain and
relieve the pressure on the water seals.
A similar junction piece J¹ is formed near top of division D (Fig. 1) for use
instead of or together with the junction at J. In case only one of the two junction
pieces is used, an earthenware or iron stopper is provided to fit into the junction
not in use.
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
I. An intercepting trap which by its depth of seal and duplicate chambers gives
great security against the escape of sewer gas.
II. Accessibility to interior of trap and facility for cleaning.
III. Provision for ventilation.
JOHN CARTER.