Improvements in and relating to Soldering Aluminium and its Alloys
Year: 1898

page_text: or, as before mentioned, the cooling may be expedited by sprinkling water
thereon.
Dated this 7th day of November 1898.
G. E. BOURGOIN,
By his Agents, Horn, Son & Co.,
151, Strand (next to Somerset House), London.
COMPLETE SPECIFICATION.
Improvements in and relating to Soldering Aluminium and its
Alloys,
I, GUSTAVE EUGÈNE BOURGOIN, of 3, Rue Froment, Paris, France, Worker
in Aluminium, 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 improvements in soldering aluminium and its
alloys, the object of my invention being to enable articles made of aluminium
or of its alloys to be readily soldered or joined together and my invention
consists in the improved process and also in the improved flux, all substantially
as hereinafter described.
In carrying my invention into practice, I employ any suitable fire-resisting
material such as earth, fire-clay, stone or other suitable material which I mould
or otherwise form with a groove or pit into which groove or pit I place the
article to be soldered or united, leaving a small space between said articles
and said articles having been first dipped or coated with a flux or compound of
Ethylic alcohol CH³ CH³, OH
Venetian turpentine
Essence of common lavender
-
-
-
-
-
95 parts by weight.
3 parts by weight.
2 parts by weight.
I also mould or otherwise form a 65
runner at the point where the parts are
to be soldered or united and I leave sufficient space around said parts to enable
them to be readily heated by means of a blow pipe or otherwise.
Simultaneously with heating the parts to be soldered I also melt a small
quantity of aluminium--if the articles to be joined are of aluminium-or of
an alloy of aluminium similar to or identical with that alloy of which the said
articles are made, employing for the melting operation either a metal ladle or a
suitable crucible which latter must not, however, be silicious.
"
When the articles at their points or parts of ultimate junction are about red-
hot, and the aluminium or alloy referred to is molten, pour the latter down
articles and whole will be united and may be left to cool, or if desired the
cooling may be expedited by sprinkling water thereon.
the " runner and the molten metal will partly fuse the heated portions of the
If the articles to be soldered are small, I prefer to employ a fire-brick or
other suitable material having a cavity or the like in which-by means say of
a blow pipe—I melt a small quantity of aluminium or its alloy according as
the articles are made of aluminium or its alloy. I then heat the ends of the
articles to be joined as before described and dip them in the molten metal until
the said ends begin to be partly fused, when I bring said ends gently together
into their proper positions and without using much pressure and they will

page_text: become soldered or united together. The whole piece is then allowed to cool
or, as before-mentioned, cooling may be expedited by sprinkling water thereon.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, declare that what
I claim is: : _
1. The improved process of soldering aluminium and its alloys substantially
as herein before described.
2. The improved flux to be used in soldering aluminium and its alloys said
flux consisting substantially of