Year: 1898

page_text: Date of Application, 13th Dec., 1898
Complete Specification Left, 7th Sept., 1899-Accepted, 14th Oct., 1899
I, THEODORUS CORNELIS VAN DE STADT, of Aardenbourg, Holland, Works
Manager, do hereby declare the nature of this invention to be as follows:-
This invention relates to a process whereby aluminium can be soldered or
brazed either to aluminium or to any other metal by a simple operation and
by means of ordinary instruments such as the soldering-iron, the blow-pipe
etc., usually employed for effecting the soldering of ordinary metals.
To this end my invention consists essentially in first modifying the nature
of the aluminium or, generally speaking in preparing the parts to be joined at
the spot where the soldering is to be effected by the application to this part
(under the action of heat) of an alloy of zinc and of aluminium which can be
easily soldered at any moment by means of a composition of ordinary solder.
In carrying out my invention I employ for this preliminary operation, which
I call the preparation for the brazing, an alloy composed of about 95 parts of
zinc, preferably as pure as possible, and 5 parts of aluminium; I then effect the
soldering properly so called by means of a solder consisting of about 2 parts of
tin to one part of lead.
To enable the process to be fully understood I will proceed to describe in
detail a mode of manufacturing alloys or solders of the kind above described (I
will call the first solder "No. 1" and the second solder "No. 2") as also the
practical application of my process by means of the soldering-iron and of the
blow-pipe.
A. Preparation of the solders.
To prepare solder No. 1 the aluminium is broken into pieces and these pieces
are gradually fused in a plumbago or graphite crucible. When the mass is
molten I add to it gradually the pieces of zinc above mentioned and I intimately
mix the whole together, by means of a bar of iron for example, until a perfectly
homogeneous alloy is obtained.
Care must be taken not to heat the mass to too high a temperature in order
to avoid the volatilisation of the zine, the result of which would be that the
solder would be rendered too brittle. The contents are then poured into a heated
mould so as to obtain suitable bars or rods.
To prepare solder No. 2 the tin is fused in a graphite crucible and the lead
is then added to it; when the whole is well fused the solder is poured in the
form of sticks into a heated mould.
B. The application of the solder by means of the soldering-iron and of the
blow-pipe.
The solders being obtained as above described I proceed in the following
manner-
The soldering-iron is first prepared and to this end it is heated, well cleaned
and passed over solder No. 1; it is then ready for use.
The aluminium to which the solder is to be applied is then prepared; it is
suitably cleaned, the soldering-iron is heated and is passed over solder No. 1 in
such a manner as to remove a certain quantity thereof which is spread over the
parts to be brazed; the same operation is gone through with solder No. 2. The
parts to be soldered are then placed one upon the other or side by side as is
CD 077

page_text: necessitated by the work to be done and the soldering-iron is held to the part
having the solder until the latter commences to flow."
After cooling, the parts are intimately soldered the one to the other and can.
be worked in all ways.
As will be easily understood the soldering can be effected with the same
facility by means of the blow-pipe; it is only necessary, when the parts to be
fitted together have been suitably prepared, to hold them together by means of
a clamp and to apply solder No. 2 upon the parts thus held and then to heat
until the solder commences to flow.
The operator can, as he desires, make the soldering more or less strong; the
more he employs of solder No. 1 for the preparation of the parts to be soldered,
the more resistant will the joint be, and the more he employs of solder, No. 2
the more malleable it will be..
-
To solder aluminium to copper or other metals the aluminium is first pre-
pared in the manner described by means of the two solders.
The piece of copper or other metal is heated in the same way and the two
parts are joined in the manner above described.
From the foregoing description it will be obvious that
applied to all kinds of metal pieces etc., to be joined.
my
T
invention can be
Dated the 13th dox of December 1980
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
Soldering or Brazing Aluminium.'
I, THEODORUS CORNELIS VAN DE STADT, of Aardenbourg, Holland, Works
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: -—
This invention relates to a process whereby aluminium can, be soldered or
brazed either to-aluminium or to any other metal by a simple operation and
by means of ordinary instruments such as the soldering-iron, the blow-pipe
etc., usually employed for effecting the soldering of ordinary metals:
.r
To this end my invention consists essentially in first modifying the nature
of the aluminium or generally speaking, in preparing the parts to be joined at
the spot where the soldering is to be effected by the application of this part
(under the action of heat) of an alloy of zinc and of aluminium which can be
easily soldered at any moment by means of a composition of ordinary solder.
In carrying out my invention I employ for this preliminary operation, which
I call the preparation for the brazing, an alloy composed of about 95 parts of
zinc, preferably as pure as possible, and 5 parts of aluminium; I then effect the
soldering. properly so called by means of a solder consisting of about 2' parts of
tin to one part of lead.
To enable the process to be fully understood I will proceed to describe in
detail a mode of manufacturing alloys or solders of the kind above described. (I
will call the first. solder No. 1" and the second solder "No. 2") as also the
practical application of my process by means of the soldering-iron and of the
blow-pipe.
A. Preparation of the solders.
Im
To prepare solder No. 1 the aluminium is broken into pieces and these pieces
are gradually fused in a plumbago or graphite crucible. When the mass is
molten I add to it gradually the pieces of zinc above mentioned and I intimately

page_text: mix the whole together, by means of a bar of iron for example, until a perfectly
homogeneous alloy is obtained. Care must be taken not to heat the mass to too
high a temperature in order to avoid the volatilisation of the zinc, the result of
which would be that the solder would be rendered too brittle. The contents
are then poured into a heated mould so as to obtain suitable bars or rods.
To prepare solder No. 2 the tin is fused in a graphite crucible and the lead
is then added to it; when the whole is well fused the solder is poured in the
form of sticks into a heated mould.
B. The application of the solder by means of the soldering-iron and of the
blow-pipe.
The solders being obtained as above described I proceed in the following
manner-
The soldering-iron is first prepared and to this end it is heated, well cleaned
and passed over solder No. 1; it is then ready for use.
The
The aluminium to which the solder is to be applied is then prepared; it is
suitably cleaned, the soldering-iron is heated and is passed over solder No. 1 in
such a manner as to remove a certain quantity thereof which is spread over the
parts to be brazed; the same operation is gone through with solder No. 2.
parts to be soldered are then placed one upon the other or side by side as is
necessitated by the work to be done and the soldering-iron is held to the part
having the solder until the latter commences to flow.
After cooling, the parts are intimately soldered the one to the other and can
be worked in all ways.
As will be easily understood the soldering can be effected with the same
facility by means of the blow-pipe; it is only necessary, when the parts to be
fitted together have been suitably prepared, to hold them together by means of
a clamp and to apply solder No. 2 upon the parts thus held and then to heat
until the solder commences to flow.
The operator can, as he desires, make the soldering more or less strong; the
more he employs of solder No. 1 for the preparation of the parts to be soldered,
the more resistant will the joint be, and the more he employs of solder No. 2
the more malleable it will be.
To solder aluminium to copper or other metals the aluminium is first pre-
pared in the manner described by means of the two solders.
The piece of copper or other metal is heated in the same way and the two
parts are joined in the manner above described.
From the foregoing description it will be obvious that my invention can be
applied to all kinds of metal pieces etc., to be joined.
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: -
1. A process of soldering aluminium to aluminium or other metal consisting
in first preparing the parts to be soldered by means of an alloy of zinc and
aluminium capable of combining with aluminium under the action of heat and
of being soldered by a solder having a base of tin, substantially as hereinbefore
described.
2. A process of the kind described in Claim 1 wherein the parts to be soldered
are first prepared with an alloy composed of about 95 parts of zinc and 5 parts
of aluminium applied by heat and are then soldered by means of an alloy com-
posed of about 2 parts of tin and one part of lead, substantially as hereinbefore
described.
Dated the 7th
C
1
1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.