Improvements in or relating to the Coating of Metals.
Year: 1889

page_text: Date of Application, 21st Feb., 1889
Complete Specification Left, 8th Apr.; 1889-Accepted, 17th Aug., 1889
PROVISIONAL SPECIFICATION.
Improvements in or relating to the Coating of Metals.
A communication from WILLIAM GEORGE CLARK, of Hergott Springs, in the
Province of South Australia, Machinist.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E. do hereby declare the nature of this invention to be as follows:-
This invention relates to the coating of metals notably iron and steel with copper,
and in carrying it into effect I can proceed as follows:-
The copper may be applied in a melted state or at a welding heat, the
used containing a suitable proportion (say for example 883 per cent.) of silicious sand
copper flux
and the balance of oxides such as iron and alumina and carbonate of lime which also
may be applied at a welding heat.
Dated this 21st day of linha 1000
W. P. THOMPSON & BOULT,
Agents.
COMPLETE SPECIFICATION.
Improvements in or relating to the Coating of Metals.
A communication from WILLIAM GEORGE CLARK, of Hergott Springs, in the
Province of South Australia, Machinist.
I, ALFRED JULIUS BOULT of 323 High Holborn, in the County of Middlesex,
M.I.M.E., 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:-
My Invention relates to the coating or welding of iron or steel with copper and the
welding of copper or alloys of copper such as Muntz metal by the application of a
special flux. This flux I obtain in its natural state from the earth ready for use or
prepare by the combination of similar component parts. The natural flux is obtained
near the township of Hergott in the colony of South Australia and is shewn on
analysis to be composed of 98.3 per centum or thereabouts of silicious sand and of
soluble matters consisting of oxide of iron oxide of alumina and carbonate of lime;
and is obtained in a very finely divided state. In making an artificial flux I follow a
similar composition as closely as possible without binding myself to the exact relative
proportions of the three last named ingredients.
The method of applying the flux is exceedingly simple. The iron or steel for
treatment is heated to welding point and whilst at this temperature is covered
with the flux either by dipping it in a chamber containing the same, or by
dredging the flux upon it from a vessel having a perforated lid. If the iron or
steel has been raised to a suitable temperature the particles of flux adhering
thereto will at once melt and flow over the surface of the article until the latter
is entirely covered. The article may then be reheated to a welding temperature
and dipped into molten copper. A skin or coating of copper will immediately
unite with the iron from which it cannot be again disunited.
In the same way
by raising iron or steel to the required temperature and covering it with the flux
sheet-copper of any thickness may be welded thereto on its being raised to a
similar temperature before application of the welding surfaces. By the application
of the same flux copper when raised to the required temperature can be readily
welded.

page_text: I wish it to be distinctly understood that I do not bind myself to the exact
proportions of the composition of the flux or to the exact details of the method of
its application but having now particularly described and explained the nature of
my said Invention and in what manner the same is to be performed I declare
that what I claim is:-
In the process of coating iron or steel with copper by dipping or welding, or
the welding of copper or alloys of copper the application of a flux obtained either
as a natural product or chemical composition which consists of silicious sand
oxide of iron, oxide of alumina and carbonate of lime or their equivalents in the
proportions substantially as herein described.