Brazing or Soldering of Objects made of Aluminium or of its Alloys.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Brazing or Soldering of Objects made of Aluminium or of its Alloys.
I, GUSTAVE EUGÈNE BOURGOIN, of 3, Rue Froment, Paris, Aluminist, do hereby
declare the nature of this invention to be as follows:-
:-
According to this invention when it is desired to join together certain parts
of objects made of pure aluminium, (Al), or of its alloys, the said parts are first
covered with a solution, the composition of which will be indicated further on,
and then heated over any kind of hearth at a temperature of about 150 to 300 C.,
during which operation they are coated with a thin layer of brazing or solder,
the constituents of which will be given hereafter, the object being to firmly and
durably join together the parts to be brazed after they have been brought into
close contact with one another.
The solution employed for covering the parts to be brazed is as follows:--
Ethylic alcohol (CH³ CH2OH)
Venetian turpentine
Essence of lavender
95 parts by weight
3 parts by weight
2 parts by weight.
This solution is made by pouring the venetian turpentine into the ethylic
alcohol (CH3 CH2OH), the former having been previously heated in a water
bath (hot water into which a vessel is placed for the purposes of heating the
contents thereof), and then adding the essence of lavender.
Beyond this a brazing or solder is used, the composition of which is as follows,
according to the degree of strength required::
1. From 10 to 20 parts by weight of an aluminium alloy containing two per
cent. of the alloy which forms the subject of another application in my name
filed 7th November 1898 and numbered 23386, and comprising copper (Cu),
nickel (Ni), fine cast steel and a small quantity of pure aluminium (Al).
2. From 80 to 90 parts by weight of fin (Sn).
The brazing or solder is made by melting in a non-silicious crucible the alloy
composed of 98 per cent. of pure aluminium (Al) and of two per cent. of the
alloy, referred to above, the composition of which is here reproduced:-
Copper (Cu)
Nickel (Ni)
Fine cast steel
Pure aluminium
-
2 to 6 parts by weight
1 to 3 parts by weight
1 to 2 parts by weight
1 part by weight.
The contents of the crucible are poured into the tin, which has been previously
melted, the whole being stirred until the mixture begins to solidify. It is
desirable to effect a second melting in order to ensure the homogeneousness of
the metal.
The mixture is then run off in round moulds or slabs (plates), according to
requirements.
In order to effect a brazing the pieces previously covered with the solution
above described are preferably taken and are heated at a temperature vorring

page_text: from 150 to 300 C., according to the thickness of the pieces to be brazed. The
surfaces to be joined together are then coated with a thin layer of the brazing
or solder as mentioned in this specification, either by means of a soldering iron
(made preferably of aluminium Al) or by means of an old file or any other
instrument which has been previously made nearly red hot.
The two surfaces to be joined together are placed one against the other in
their respective places, and are firmly kept in that position and heated by means
of any kind of hearth (furnace, blow-pipe etc.), in order to melt, the layer of
brazing or solder which covers the surfaces to be joined together; the latter are
then allowed to cool and may be plunged into hot water for the purpose of assist-
ing the cooling.
If the operation is only for the purpose of stopping a hole in a piece which
has been badly cast or to strengthen a part which is not strong enough, it is
sufficient to cover the spot to which the brazing or solder is to be applied, with
the above described solution, to heat the piece that is to be repaired, apply the
solder which has been melted, as in the previous case and to let the piece cool.
Dated this 7th day of November 1898.
G. E. BOURGOIN.
By his Agents, Horn, Son & Co.,
151, Strand, (next to Somerset House), London.
ע VUA
DI MULTIVATION.
Brazing or Soldering of Objects made of Aluminium or of its Alloys.
GUSTAVE EUGENE BOURGOIN, of 3, Rue Froment, Paris, Aluminist, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
According to this invention, when it is desired to join together certain parts
of objects made of pure aluminium, (Al.) or of its alloys, the said parts are first
covered with a solution, the composition of which will be indicated further on,
and then heated over any kind of hearth at a temperature of about 150 to 300 C.
during which operation they are coated with a thin layer of brazing or solder,
the constituents of which will be given hereafter, the object being to firmly and
durably join the parts to be brazed after they have been brought into close
contact with one another.
The solution employed for covering the parts to be brazed is as follows:-
Ethylic alcohol (CH³. CH2OH)
Venetian turpentine
Essence of lavender
95 parts by weight
3 parts by weight
2 parts by weight.
This solution is made by pouring the venetian turpentine into the ethylic
alcohol (CH3 CH2OH), the former having been previously heated in a water
bath (hot water into which a vessel is placed for the purposes of heating the
contents thereof) and then adding the essence of lavender.
Beyond this a brazing or solder is used, the composition of which is as follows,
according to the degree of strength required:-
1. From 10 to 20 parts by weight of an aluminium alloy containing two per
cent. of the alloy which forms the subject of another application in my name
filed 7th November 1898 and numbered 23386, and comprising copper (Cu.)
nickel (Ni.), fine cast steel and a small quantity of pure aluminium (Al.).

page_text: The contents of the crucible are poured into the tin, which has been previously
melted, the whole being stirred until the mixture begins to solidify. It is
desirable to effect a second melting in order to ensure the homogeneousness of
the metal.
The mixture is then run off in round moulds or slabs (plates), according to
requirements.
In order to effect a brazing the pieces previously covered with the solution
above described are preferably taken and are heated at a temperature varying
from 150 to 300 C., according to the thickness of the pieces to be brazed. The
surfaces to be joined together are then coated with a thin layer of the brazing
or solder as mentioned in this specification, either by means of a soldering iron
(made preferably of aluminium Al) or by means of an old file or any other
instrument which has been previously made nearly red hot.
The two surfaces to be joined together are placed one against the other in
their respective places, and are firmly kept in that position and heated by means
of any kind of hearth (furnace, blow-pipe etc.) in order to melt the layer of
brazing or solder which covers the surfaces to be joined together; the latter are
then allowed to cool and may be plunged into hot water for the purpose of assist-
ing the cooling.
If the operation is only for the purpose of stopping a hole in a piece which
has been badly cast or to strengthen a part which is not strong enough, it is
sufficient to cover the spot to which the brazing or solder is to be applied, with
the above described solution, to heat the piece that is to be repaired, apply the
solder which has been melted, as in the previous case and to let the piece cool.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
The improvements in brazing or soldering of objects or articles made of
aluminium or of its alloys consisting in covering said parts or articles where they
are to be soldered or strengthened with a composition consisting of ethylic alcohol,
venetian turpentine and essence of lavender and after heating said parts soldering
or brazing them with a solder consisting of copper, nickel fine cast steel and
aluminium all in about the proportions and substantially as herein before set
forth.