Improvements in and relating to Drain Traps.
Year: 1891

page_text: Date of Application, 3rd Nov., 1891
Complete Specification Left, 5th Sept., 1892-Accepted, 8th Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in and relating to Drain Traps.
I JOHN READ ANDERSON, of The Cottage, Gibson's Hill, Norwood in the
County of Surrey, Civil Engineer do hereby declare the nature of this invention
to be as follows:-
This invention relates to a special construction of drain trap the object being to
facilitate the periodical testing of house drains.
For this purpose I construct a trap such as those commonly fixed at the outlet of
the manhole which is usually placed between the drains of a house and the sewer
and I prepare the mouth of the trap at its inlet specially for the purpose of
stoppering it when required.
When the body of the trap is made of iron or of glazed pottery-ware I prefer
to fix a gun metal bush therein by cementing or otherwise so as to permanently
fix the same therein and I bore the bush with a tapering passage to receive
a tapered gun metal plug; but the mouth at the inlet to the trap may be pre-
pared in any suitable way to adapt it for being closed hermetically by means of a
stopper.
In order to test drains provided with such a drain trap it is only necessary to
remove the cover of the manhole, put the plug in the mouth of the trap, the plug
being hung by a chain so as to be permanently kept in readiness in the manhole,
and then fill up the drains with water rising in the pipes and in the manhole to a
level which will ensure charging the whole system of drain pipes and show by
maintenance of the level, or otherwise, the drains to be sound or unsound.
Dated this 3rd day of November 1891
AYRTON & THOMAS,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in and relating to Drain Traps.
I JOHN READ ANDERSON of The Cottage Gibson's Hill Norwood in the County
of Surrey, Civil Engineer 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 :—
My said invention is designed to furnish an effectual means for and method of
testing the efficiency of house drains without materially interfering with existing
arrangements provided that an intercepting sewer trap of modern construction has
been placed between the house drains and the sewer, such trap being usually built
into a manhole or examination chamber and for this purpose I specially prepare the
mouth of the trap for the purpose of stoppering it when required to close it
hermetically by means of a stopper of suitable construction conveniently placed in
position and at all times ready for use.
Referring to the accompanying drawing I will proceed to more fully describe my
invention.
When the body of the trap is of metal or glazed pottery ware I prefer to fix
permanently therein by cementing or other well known means a gun metal or like
bush A Figure 2 which I bore with a tapering passage to receive a gun metal or
like plug such as shown by Figure 1 which is conveniently hung by a chain or
upon a hook or other device over the trap so that it may be taken therefrom and
lowered into the mouth of the trap so as to hermetically seal the same and for this
[D1

page_text: purpose the metal or other plug may have a rubber or suitable flange formed or
placed upon or around it so as to ensure a perfect fit.
In order to test drains provided with a trap so prepared and a corresponding
plug it is only necessary to remove the cover of the manhole, lower the plug
into the mouth of the trap and fill up the drains and manhole with water to
such a level as will ensure the whole system of drains being thoroughly charged
therewith.
If the level of the water is then maintained the drainage will be proved to be
sound, if not, leakage will be detected at once.
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. For detecting leakage in a system of drain pipes the use of a tapered bush
fixed in the inlet of an intercepting trap with a correspondingly tapered plug or
like device hung or placed in readiness near thereto for the purpose of being
lowered into and hermetically sealing the same substantially as hereinbefore
described and as illustrated by the accompanying drawing.
2. The means for and method of detecting leakage in a system of house drains
substantially as herein before described.
•
Dated this 3rd day of September 1892.
POPPLEWELL & Co.,
17 & 18, Southampton Buildings, Chancery Lane, London, W...
Agents for the Applicant.