Improved Solder for Joining Together Aluminium Pieces or Pieces of Aluminium with other Metals.
Year: 1892

page_text: Date of Application, 29th Mar., 1892-Accepted, 30th Apr., 1892
COMPLETE SPECIFICATION.
Improved Solder for Joining Together Aluminium Pieces or Pieces
of Aluminium with other Metals.
I, GEORG WEGNER of 7 Oppilner Strasse Berlin, Germany Goldsmith 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 :-
Many attempts have been made lately to invent a durable solder for aluminium
but up to the present time nothing has been found that will solder together pieces
of aluminium in a durable manner, although it has been found so easy to solder other
metals.
So far the trials made in France have had no practical result, likewise the
attempts made last year in Switzerland have not solved the question, as a solder
made of common solder and zinc though uniting the parts is in no way sufficient and
does not answer the purpose, i.e., it does not unite the pieces of aluminium in such
a way that they can only be separated by means of heat.
People have tried to unite the pieces of aluminimum by covering the aluminium
at first with a coat of another metal, but, in this case, the metal coating is, alone,
united and a single stroke with a hammer is quite sufficient to separate the pieces
again.
In the present invention a solder is used which unites the aluminium pieces
directly and the connection is so thorough that there is absolutely no difference
between an article made of pieces soldered together and the same article when
made out of a single piece of metal.
The colder consis
ellay mode of
1
A trial made on aluminium with this alloy gave the following results :-
Two pieces of aluminium-plate, one millimeter in thickness and three centimeters
n width, were soldered together, one on the top of the other, and, after soldering,
were hammered to a width of five centimeters without loosening the solder.
As a proof of the durability of the solder the connection was just as thorough
after as before the hammering.
If it is desired to give to the seam of solder a silver-white colour similar to the
aluminium, which is imperative in making fine articles, then the lead may be sub-
stituted by a certain proportion of aluminium, preferably about 100 parts. This
alloy has the same durability and strength as the former alloy.
The pieces may be soldered together without the use of soldering spirit and sal-
ammoniac. To do this the aluminium pieces are, first, thoroughly cleaned, but
without the use of special articles (for example files, polishing-powder etc.) and
then the alloy is placed upon the surface and a copper or forged-iron soldering-
bolt applied which effects, at once, the solution of the alloy so that the tinned
surfaces have now a smooth firmly-attached coating which can only be removed by
heat. This coating may be of any convenient thickness, but, it must be mentioned,
that, the soldering-bolt should only be used at a red heat.
The tin remaining on the bolt, after soldering, should be removed by means of a
file but never by touching with sal-ammoniac.
It is of advantage to warm the aluminium pieces so that the bolt will lose
less heat.
If the soldering is to be done, on parts which are out of reach of the bolt, as in
F Price 8dl

page_text: corners, cylinders, etc., then the aluminium must be more highly heated and the
solder must be brought to the place by a red-hot wire. In this class of work, for
better distribution, rosin may be used in the usual way.
The solder may be used not only for jointing pieces of aluminium but also for
connecting aluminium to other metals.
When the solder is used as herein described it does. not foam when being
applied.
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 solder for soldering together aluminium pieces or pieces of aluminium with
other metals consisting of
165 parts of lead
100 parts English tin, and
9 parts zinc,
applied substantially as herein before set forth.
2. A solder for soldering together aluminium pieces or pieces of aluminium with
other metals consisting of
about 100 parts of aluminium
100 parts English tin
parts zinc
for the purpose of giving the soldering seam a silvery-white colour similar to the
aluminium.
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.