An Improved Method of Coating Iron or Steel Plates with Copper and other Comparatively Non-oxidisable Metals.
Year: 1888

page_text: Date of Application, 27th Nov., 1888
Complete Specification Left, 25th Sept., 1889-Accepted, 26th Oct., 1889
PROVISIONAL SPECIFICATION.
An Improved Method of Coating Iron or Steel Plates with Copper
and other Comparatively Non-oxidisable Metals.
We, GEORGE PROUT, Mining Engineer, and DAVID MURRAY, Merchant, both of
12, 13 and 14, Barbican, in the County of Middlesex, do hereby declare the nature
of this invention to be as follows:-
This invention relates to coating or facing iron or steel plates with copper, muntz
metal, brass and other comparatively non-oxidisable metal, in such a manner that
perfect metallic combination is effected between the iron or steel plates and the
copper or other facing metal.
In applying our invention to the coating of an iron or steel plate with copper, we
heat the plate to a temperature of 1,800° or 2,000° Fahr. or thereabouts, and after
sprinkling its upper surface with borax, sal-ammoniac, rosin or other suitable flux,
we apply to the plate, according to the thickness of the protective coating desired, a
suitable quantity of copper in a molten state. When the copper is approaching
solidification,, we pass the plate through rolls heated to a temperature somewhat
below the melting point of the coating material; the object being to avoid cooling
the copper rapidly but to maintain it in a semi-molten condition whilst the plate is
subjected to the initial portion of the rolling process. The rolling is continued
whilst the coating material undergoes solidification, the ultimate result being that
the copper face is thoroughly welded to the iron or steel back.
Any suitable furnace may be employed for heating the plates or for melting the
copper or the plates may be treated immediately after leaving the rolling mill
employed in their manufacture. The rolls for use in attaching the copper face may
be heated by means of a gas flame.
Other metals of a comparatively non-oxidisable character and adapted for being
rolled may be welded in a similar manner to an iron or steel back; the flux, as
also the temperatures, being suitably varied according to the object to be
accomplished.
.
Although the employment of a suitable flux will usually be found to facilitate the
attainment of a satisfactory result, we do not regard the use thereof as in all cases
essential to the success of our invention.
Dated this 27th day of November 1888.
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Agent for the Applicants.
COMPLETE SPECIFICATION.
An Improved Method of Coating Iron or Steel Plates with Copper
and other Comparatively Non-oxidisable Metals.
We, GEORGE PROUT, Mining Engineer, and DAVID MURRAY, Merchant, both of
12, 13 and 14, Barbican, in the County of Middlesex, 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 coating or facing iron or steel plates with copper, muntz
metal, brass and other comparatively non-oxidisable metals in such a manner that
perfect metallic combination is effected between the iron or steel plate and the copper.
or other facing metal.
In applying our invention to the coating of an iron or steel plate with coppe
we heat the plate to a temperature of 2000° Fahr., or thereabouts, and

page_text: sprinkling its upper surface with borax, sal ainmoniac, rosin or other suitable flux,
we apply to the plate, according to the thickness of the protective coating desired, a
suitable quantity of copper in a molten state. When the copper is approaching
solidification, we pass the plate between rolls whereof the upper one, or that in
contact with the copper, is, by preference, heated to a considerable temperature; the
object being to avoid cooling the copper rapidly, but, on the contrary, to maintain it
in a semi-molten condition whilst the plate is subjected to the initial portion of the
rolling process. The rolling is continued whilst the coating metal undergoes
solidification, the ultimate result being that the copper face is thoroughly welded to
or combined with the iron or steel back.
Any suitable furnace may be employed for heating the plates or for melting the
copper or the plates may be treated immediately after leaving the rolling mill
employed in their manufacture. The heating of the upper roll may be effected by
Geans of a gas flame applied internally.
Other metals of a comparatively non-oxidisable character and adapted for being
rolled may be welded or attached in a similar manner to an iron or steel back; the
flux, as also the temperatures, being suitably varied according to the object to be
accomplished.
Although the employment of a suitable flux will usually be found to facilitate the
attainment of a satisfactory result, we do not regard the use thereof as in all cases
essential to the success of our invention. Similarly, we would have it understood
that the rolling process to which the coated plate is subjected is intended to effect
the even distribution of the copper, to force it into the open pores of the iron, to
solidify it and to leave the coated plate with a smooth finished surface. The com-
bination which takes place between the iron and the copper is, however, principally
due to the chemical affinity which exists between these two metals when brought
together under conditions admitting of metallic combination taking place.
Having thus particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, we claim :-
1. The improved method of coating iron or steel plates with copper substantially as
herein described.
2. The improved method of coating iron or steel plates with muntz metal, brass or
similar comparatively non-oxidisable metal, substantially as herein described.
3. In coating an iron or steel plate with copper or other comparatively non-
oxidisable metal, heating the plate to a high temperature, applying the copper or
other coating metal in a molten state and rolling the same, substantially as herein
described.
4. An iron or steel plate coated with copper or other comparatively non-oxidisable
metal substantially in the manner herein described.
Dated this 24th day of September 1889.
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Agent for the Applicants.