Soldering of Aluminium or Metals Alloyed with Aluminium.
Year: 1896

page_text: Date of Application, 2nd Mar., 1896
Complete Specification Left. 30th Nov.. 1896-Accepted; 13th Feb., 1897
Soldering of Aluminium or Metals Alloyed with Aluminium.
FRANCIS FREDERICK BARNES of 193 Creek Road Deptford London S.E., :
Carpenter, and FRANCIS CAMPBELL of 53, Church Street Greenwich London, S.E.,
Engineer, do hereby declare the nature of this invention to be as follows:-
We find after a series of experiments to join aluminium, that zinc alone makes
a sound joint; by melting a small quanity of aluminium with the zinc improves the
quality of the solder. We also found that several metals fused together makes a
good solder, namely:-zinc, aluminium, and tin, or, zinc, aluminium, tin and
copper, in the last three mentioned solders, zinc-predominate's from seventy live to
ninety five in the hundred.
Dated this Second day of March 1806
FRANCIS FREDERICK BARNES.
FRANCIS CAMPBELL.
Soldering of Aluminium or Metals Alloyed with Aluminium.
We, FRANCIS FREDERICK BARNES, Carpenter and FRANCIS CAMPBELL,
late of 53 Church Street Greenwich London S.E. Engineer, now both of 193
Creek Road, Deptford, London, 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:-
We find that to join aluminium successfully by soldering, zine alone makes a
perfect joint. 5 per cent. of aluminium with the zine however makes a stronger
joint, and improves the color of the solder.
In preparing the aluminium for soldering, the joint is simply cleaned by filing or
scraping. The parts to be joined are then heated by a clear Hame, or by contact
with a copper bit. When the right heat is obtained, which is easily found, the
solder will take on to the parts in the same way as ordinary tinning. The
parts can then be joined by placing them together and heating to the right
temperature.
No flux is to be used.

page_text: In preparing the solder, the metals in small fragments may be placed in au
ordinary crucible of suitable size, according to the amount of metal to be dealt with,
and heated, when the whole is fluid and well mixed, the solder is poured out, and
cast into thin sticks, as is usual. By preference, however, we first melt the
aluminium, or other metals, used in the solder, which have a higher melting
temperature than the zinc, and add the latter metal later, thus avoiding risk of
burning the zinc.
Solder can also be made with proportions (small) of copper or cadmium added
to above, but ziuc as the chief component of the solder is the loundation for
success.
We have found by experience that the addition of tin to the zinc in the pre-
paration of the solder should always be avoided otherwise the joints will be unsound
and lacking in permanence.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:
1. Soldering aluminium with a solder of which zinc is the chief component.
2. Soldering aluminium with a solder consisting of zinc alloyed with aluminium
with or without other metal, such as specified.
Dated this 25th day of November 1896
FRANCIS FREDERICK BARNES.
FRANCIS CAMPBELL.