Improvements in or relating to the Welding of Tubes and other Objects.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in or relating to the Welding of Tubes and other
Objects.
I, ERNEST GEARING, of Penshurst, Clarence Drive, Harrogate, in the County
of York, Engineer and Manager, do hereby declare the nature of this invention
to be as follows:-
In welding tubes and other objects by flame produced by the combustion
of water gas, it has heretofore been usual to mix the water-gas with air, each
being at or slightly above the pressure of the atmosphere, in a mixing chamber
and then to conduct the combustible mixture of water gas and air through one
or more pipes or passages to the burners of the welding apparatus.
Now according to this invention in order to increase the thermic value of the
water gas and also to obviate the formation of a large volume of an explosive
mixture of such gas and air and thus to render this method of welding more
economical and safer than heretofore, the water gas and air are each separately
compressed by any suitable means and supplied separately in their compressed
state to a mixing chamber arranged in immediate proximity to the burners of the
welding apparatus, so that the mixture is burnt immediately after and near to
where it is produced. In this way a very high welding temperature can be
economically and safely attained. The water gas and air may be heated to a
high temperature before being mixed and burnt so as to thereby further increase
the temperature of combustion.
['P+9vད
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C.,
Chartered Patent Agent.
Improvements in or relating to the Welding of Tubes and other
Objects.
I, ERNEST GEARING, of Penshurst, Clarence Drive, Harrogate, in the County
of York, Engineer and Manager, 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:-

page_text: of water gas, it has heretofore been usual to mix the water-gas with air, each
being at or slightly above the pressure of the atmosphere, in a mixing chamber
and then to conduct the combustible mixture of water gas and air through one
or more pipes or passages to the burners of the welding apparatus.
Now according to this invention in order to increase the thermic value of the
water gas and also to obviate the formation of a large volume of an explosive
mixture of such gas and air and thus to render this method of welding more
economical and safer than heretofore, the water gas and air are each separately
compressed by any suitable means and supplied separately in their compressed
state to a mixing chamber arranged in immediate proximity to the burners of the
welding apparatus so that the mixture is burnt immediately after its production
and near to where it is produced. In this way a very high welding temperature
can be economically and safely attained. The water gas and air may be heated
to a high temperature for example before being mixed and burnt so as to thereby
further increase the temperature of combustion.
The accompanying drawings illustrate welding apparatus arranged for carrying
out this invention, Figs. 1 and 2 being central vertical sections at right angles
to each other of a pair of combined burners and mixing chambers oppositely
arranged, one above the other for the application of heat at two opposite sides
of the article to be welded simultaneously. The burners are constructed of suitable
refractory material 1 such as fire-bricks with flame channels or apertures 2 and
held in flanged metal casings 3. 4, 4 are the mixing chambers, the walls of which
are also formed of refractory material contained in metal casings. The burners
are attached to the mixing chambers by slotted pins or bolts 5 passing through
the flanges of the metal casings 3 and fitted with cotters 5°. The mouths of the
flame channels 2 are flared, as are also their inner ends, which are made to
extend into the mixing chambers as shown. Each mixing chamber is formed with
one or more gas and air inlets which are preferably of vena contracta form as
at 6, 6. To each inlet gas and air are supplied respectively by means of a
nozzle 7 and pipe 8 and of an annular passage 9 and pipe 10. The air may be
supplied by the nozzle 7 and pipe 8 and the gas by the annular passage 9 and
pipe 10, or vice versa. The nozzles 7 may be screw threaded as shown to provide for
their longitudinal adjustment within the passage 9.
The pipes 8 are in the example supposed to be connected to the discharge of a
blowing engine or fan by which the gas is compressed to the required pressure
and the pipes 10 are connected to the discharge of another blowing engine or fan
which similarly compresses the air. 11 represents the substance to be heated as
for example plate arranged with two edges abutting between the burner channels;
the top surface of the lower burner is rounded to enable the work to be readily
manipulated.
In some cases, it may be desirable to heat the gas or the air, or both to a high
temperature prior to admission to the mixing chambers and this may be effected by
forcing the gas or air or both through superheaters or stoves.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is;
-
1. In the welding of tubes and other objects by the use of water gas, separately
compressing the water gas and air, introducing them under pressure to and
mixing them in a mixing chamber arranged in immediate proximity to the burners
of the welding apparatus in such manner that combustion of the mixture takes
place immediately after its production and near to where it is produced, sub-
stantially as herein before described.
2. In the welding of tubes and other objects by the use of water gas, separately
compressing the water gas and air, heating both the gas and the air, or one of them,
introducing them under pressure to and mixing them in a mixing chamber
arranged in immediate proximity to the burners of the welding apparatus in such

page_text: manner that combustion of the mixture takes place immediately after its pro-
duction and near to where it is produced, substantially as herein before described.
3. The improved method of applying water gas in the welding of tubes and
other objects herein before described with reference to the accompanying illustrative
drawings, whether or not the gas and air, or one of them be heated before mixing.
1
For the Applicant,
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C.,
Chartered Patent Agent.