Improvements in or relating to Apparatus for Testing and Tracing Leakages in Gas Pipes and Gas Pipe Systems, and other Pipes or Systems of Pipes.
Year: 1897

page_text: Date of Application, 8th Sept., 1897
Complete Specification Left, 6th June, 1898-Accepted, 30th July, 1898
Date UI Application, von deploy our
Complete Specification Left, 6th June, 1898-Accepted, 30th July, 1898
PROVISIONAL SPECIFICATION.
Improvements in or relating to Apparatus for Testing and Tracing
Leakages in Gas Pipes and Gas Pipe Systems, and other Pipes or
Systems of Pipes.
I, GERARD JULIUS GEORGE JENSEN, of "South Bank," Northenden Road, Sale,
Cheshire, Civil Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention has relation to certain improvements in the methods employed
for testing gas pipes, & other pipes, singly or collectively, and has more especially
for its object the discovering and locating of leakages therein.
In carrying out my invention, I employ a force pump, or similar appliance,
wherewith to charge the pipes with air, or the gases or fumes generated in a
chamber which is part of my invention. In this chamber are placed suitable
chemicals or other suitable substance or substances which are capable of generating
fumes or gases which may be forced into the pipes by the aforesaid pump and made
to escape through any defect or leakage in the pipes, such escape being traceable
either by smell or by sight or by specially prepared test papers or any or all of
these.
To the apparatus is attached a suitable indicator or gauge which indicates the
pressure exerted in the pipes by the air or gases or fumes forced into them. By
a coupling & stop-cock this gauge or indicator may, for the time being, be made
to form part of the pipe or pipes under pressure, any alteration in the pressure
therein being noticeable on the gauge or indicator.
Dated this the 4th day of September 1897.
Improvements in or relating to Apparatus for Testing and Tracing
Leakages in Gas Pipes and Gas Pipe Systems, and other Pipes or
Systems of Pipes.
I, GERARD JULIUS GEORGE JENSEN, of 14, Victoria Street, Westminster,
London, S.W., Civil Engineer, late of South Bank, Northenden Road, Sale,
Cheshire, 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 relation to certain improvements in the methods employed

page_text: for testing gas pipes & other pipes singly or collectively & has for its object the
discovering & locating of leakages therein.
I am aware that a somewhat similar apparatus is already used for charging
pipes with fumes or gases under pressure, any leakage in the said pipes being
detected by sight or smell; my apparatus can be used in the same way, but, in
addition to this, it provides a means of detecting leakages which are too minute
to be discovered by sight or smell. I am also able to employ a light gas in place
of the dense fumes generally used, which fumes are liable to temporarily stop up
minute leaks & prevent their detection.
In carrying out my invention I employ a force pump or similar appliance (a)
wherewith the pipe or pipes can be charged with the gases or fumes generated in
the chamber (b). In this chamber placed ammonia or other suitable chemical
or substance which is capable of generating or giving off fumes or gases traceable
by a reagent such as termeric in the case of ammonia. The gases or fumes are
forced into the pipe or pipes by the aforesaid pump & consequently forced through
any defect or leakage in the pipes, the point or points at which they escape being
located by the reagent. I do not confine myself to the use of any particular
chemical or substance for generating the gas or fumes, but I find ammonia very
suitable for the purpose; in this case I use the reagent termeric in the form of
termeric test paper for detecting & locating a fault. If this test paper be passed
over the surface of the pipe being tested, its yellow colour will be turned brown
if it pass over a leak in the pipe, through which leak the ammonia gas is escaping.
To the apparatus is attached a suitable indicator or gauge (c) which, if desired
can for the time being be connected to the nipe or pipes under pressure by opening
the stop-cock (d). If this is done, any alteration in the pressure within the pipes
is indicated on the gauge or indicator.
If desired, a safety valve (e) can be attached to the apparatus so that not more
than a certain pressure can be applied to the pipes.
Heat or cold can be applied to the chamber (b) should that be desirable in
generating the fumes or gases.
(f) is a tube or coupling by which the apparatus is attached to the pipe or pipes
to be tested.
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 the testing of gas pipes or other pipes or systems of pipes, an apparatus
whereby leakages may be traced by pumping fumes or gases into the pipes &
tracing their escape by the reagent of the said fumes or gases.
(2) The improved apparatus, herein before described & shown in the accompany-
ing drawing, for the testing of gas pipes or other pipes or systems of pipes.
Dated this 6th day of June 1898.
GERARD JENSEN.