IM- PROVEMENTS IN COATING OR PROTECTING IRON, STEEL, AND THEIR COM- POUNDS
Year: 1879

page_text: LETTERS PATENT to Dugald Clerk and Charles Albert Fawsitt, both of
Glasgow, in the County of Lanark, North Britain, for the Invention of "IM-
PROVEMENTS IN COATING OR PROTECTING IRON, STEEL, AND THEIR COM-
POUNDS."
Sealed the 19th September 1879, and dated the 25th March 1879.
PROVISIONAL SPECIFICATION left by the said Dugald Clerk and Charles
Albert Fawsitt at the Office of the Commissioners of Patents on the 25th
March 1879.
DUGALD CLERK and CHARLES ALBERT FAWSITT, both of Glasgow, in the County
of Lanark, North Britain. "IMPROVEMENTS IN COATING OR PROTECTING IRON,
STEEL, AND THEIR COMPOUNDS."
This Invention has principally for its object the protecting of iron, steel, and
their compounds from oxidation or corrosion, and it consists in a mode or modes of
applying platinum as a coating for that purpose. It is an important advantage
that iron or steel coated in accordance with this Invention may be subjected to
very high temperatures without becoming oxidised; but such coated metal is also
advantageously applicable for various purposes in connection with which it may
not have to be subjected to high temperatures. The coated metal may be used for
making stills and other chemical vessels and apparatus, and will form an economical
substitute for simple platinum in these and other applications. The coated metal
may also be used for tuyeres, retorts, and even furnace bars.
In carrying out the Invention, the iron or steel, or compound of iron or steel
employed, and which must be of a quality that will weld, having had its surface or
surfaces cleaned as for welding, has a piece or pieces of sheet platinum secured in
contact with the surface or surfaces to be coated in any convenient way. The two
metals are heated in a reverberatory or other suitable furnace to a suitable
temperature, about the temperature at which iron welds being generally sufficient ;
and some pressure or concussion being then applied by hammering or otherwise,
the platinum becomes welded to the iron or steel or like metal. It is preferred to
conduct the welding operation with the iron or steel or like metal, and the platinum
in pieces or plates of considerable thickness, the platinum being of course thin
Pries A1
3

page_text: relatively to the other metal. The welded pieces or slabs are subsequently reduced
to sheets by rolling or hammering, and may be reheated and worked into various
forms, as in operating with malleable iron. Amongst the various applications of
the improved platinum-coated metal may be mentioned rods, wire, and tubes, such
articles being by preference drawn or rolled subsequently to the operation of welding a
the platinum to the iron or steel or like metal.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Dugald Clerk and Charles Albert Fawsitt in the Great Seal Patent
Office on the 23rd September 1879.
DUGALD CLERK and CHARLES ALBERT FAWSITT, both of Glasgow, in the County
of Lanark, North Britain. IMPROVEMENTS IN COATING OR PROTECTING IRON,
STEEL, AND THEIR COMPOUNDS.".
Our said Invention has principally for its object the protecting of iron, steel, and
their compounds from oxidation or corrosion, and it consists in a mode or modes of
applying platinum as a coating for that purpose. It is an important advantage
that iron or steel coated in accordance with our Invention may be subjected to
very high temperatures without becoming oxidised; but such coated metal is also
advantageously applicable for various purposes in connection with which it may
not have to be subjected to high temperature. The coated metal may be used for
making stills and other chemical vessels and apparatus, and will form an economical
substitute for simple platinum in these and other applications. The coated metal
may also be used for tuyeres, retorts, and even furnace bars.
We
In carrying out our said Invention, the iron or steel, or compound of iron or steel
employed, and which must be of a quality that will weld, having had its surface or
surfaces cleaned as for welding, has a piece or pieces of sheet platinum secured in
contact with the surface or surfaces to be coated in any convenient way. The two
I metals are heated in a reverberatory or other suitable furnace to a suitable
temperature, about the temperature at which iron welds being generally sufficient;
and some pressure or concussion being then applied by rolling or hammering or
otherwise, the platinum becomes welded to the iron or steel or like metal.
prefer to conduct the welding operation with the iron or steel or like metal, and the.
platinum in pieces or plates of considerable thickness, the platinum being of course
thin relatively to the other metal. The welded pieces or slabs are subsequently
'reduced to sheets by rolling or hammering, and may be reheated and worked into
various forms as in operating with malleable iron. Amongst the various applications
of our improved platinum-coated metal 'may be inentioned, rods, wire, and tubes,
such articles being by preference drawn or rolled subsequently to the operation of
welding the platinum to the iron or steel or like metal.
.
.f

page_text: Having thus particularly described our said Invention, and the manner of
performing the saine, we have to state that we do not restrict ourselves to the
precise details herein before described, but that what we believe to be novel and
original, and claim as the Invention secured to us by and in terms of the herein-
before in part recited Letters Patent is,―
1. The coating or protecting of iron, steel, and their compounds by welding
platinum thereon as hereinbefore described.
2. The system or mode of making platinum-coated sheets, plates, rods, wire,
tubes, or other articles of iron, steel, or their compounds, wherein the platinum is
welded to the iron or steel, or compound of iron or steel, prior to the final shaping
of the article by rolling, or hammering, or drawing, or similar treatment, substantially
as hereinbefore described.
In witness whereof, we, the said Dugald Clerk and Charles Albert Fawsitt,
have hereunto set our hands and seals, this Twentieth day of September,
in the year of our Lord One thousand eight hundred and seventy-nine.
Witness,
EDMUND HUNT,
Patent Agent,
Glasgow.
DUGALD CLERK. (L.S.)
(L.S.)
C. A. FAWSITT.