Improvements in the Construction of Intercepting Traps for Drains and the like.
Year: 1890

page_text: Date of Application, 26th Feb., 1890
Complete Specification Left, 19th Nov., 1890-Accepted, 20th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Intercepting Traps for Drains
and the like.
I, GEO. HENRY LIGHT, of 8, Seymour Street, Leicester, Manager of Colliery, do
hereby declare the nature of this invention to be as follows:-
This invention has reference to intercepting traps for drains and the like capable
of being used in connection with or without disconnecting syphons and the object
of the invention is to prevent foul or noxious air, gas or effluvia passing from the
main sewer into the drains of houses, chambers, and other inhabitable places.
For this purpose I prefer to employ a flap valve and chamber which for the sake
of convenience, are formed in two parts. The flap valve opens into the chamber
and is fixed either in or around the outlet pipe or otherwise and at such angle as
to allow of the free passage of the sewage, but otherwise to act as a seal to the
drain.
In order to ensure the close fitting of the flap valve I may adopt the use of a
collar of composition or cement at the end of the outlet or an india-rubber collar
fixed to the flap valve.
The chamber is constructed of such a shape as to admit of the flap valve opening
freely and to its fullest extent and also so as to offer no obstacle to the free flow
of the sewage.
The chamber is fitted at preferably its upper part with an opening through which
the gas or effluvia may pass into a ventilating pipe and be carried away thereby ;
the said opening will also allow of the inspection of the trap when necessary.
Dated this Ofth day of February 1890
W. P. THOMPSON & BOULT,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Construction of Intercepting Traps for Drains
and the like.
I, GEORGE HENRY LIGHT, 8, Seymour Street, Leicester, Manager of Colliery, and
Sanitary Pipe Works, 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 has reference to intercepting traps for drains and the like capable of
being used in connection with or without disconnecting syphons and the object of the
invention is to prevent foul or noxious air, gas, effluvia or back flush of water or
sewage passing from the main sewer into the drains of houses, chambers and other
inhabitable places.
For this purpose I prefer to employ a flap valve opening into a chamber and
mounted either in or around the inlet or other pipe and at such an angle as to allow
of the free passage of the sewage, but otherwise to act as a seal to the drain.
In order to ensure the close fitting of the flap valve I may use a collar or seating of
composition or cement at the end of the inlet, and an india-rubber collar fixed to the
flap valve.
The chamber is constructed of such a shape as to admit of the flap valve opening
freely and to its fullest extent, and also so as to offer no obstacle to the free flow of
L

page_text: In the accompanying drawings,
Figure 1 shews a longitudinal section of a disconnecting syphon, or drain pipe,
having my invention incorporated therein.
Figure 2 is an end view shewing the flap valve in front elevation.
Figure 3 is an end view of the disconnecting syphon with the pipe A removed.
A is the inlet pipe communicating with the syphon B and having my improved
valve applied thereto.
The flap valve C is carried at an angle as shewn in Figure 1, so that its own weight
will be sufficient to keep the valve in its closed position and to cause it to close
of its own accord after having been opened by the passage of sewage or water.
The flap valve C may be of galvanised iron or other suitable material and provided
with a tube or sleeve C', to enable it to be hung centrally on an iron or other
rod D, and retained in proper position thereon by means of washers D' and pins D³.
The ends of the rod D enter openings in the frame of the trap and are firmly
secured in position by means of lead in the usual manner.
•
The internal face of the flap valve C is formed with an annular groove to receive a
ring E, of india-rubber or equivalent material, preferably of semi-circular section
"
and fixed or secured in the said groove by means of composition or like material.
In order to more effectually secure the close fitting of the valve and thereby
ensure a true seal to the drain, the face or end of the pipe A is formed with a
seating A' of Parian cement or other material, of preferably quadrantal form in
cross section and fitting to the ring E as shewn.
•
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is,
1. The use in connection with drain pipes and the like of a flap valve such
as Chung on a rod D and provided on its inner face with an annular groove to
receive a ring E of india rubber or equivalent material substantially as and for the
purpose described and illustrated in the accompanying drawings.
2. In drain pipes and the like the combination with a flap valve such as C of a
pipe or fitting such as A the end of which is provided with a seating such as A'
substantially as and for the purpose described and illustrated in the accompanying
drawings.
3. The use or employment in drain pipes and the like of a horizontal rod such
as D fixed in the sides thereof and carrying a flap valve substantially in the manner
and for the purpose described and illustrated in the accompanying drawings,
Dated this 18th day of November 1890.
GEORGE HENRY LIGHT.
W. P. Thompson & Boult,
Agents for the Applicant.