AN IMPROVED COATING FOR IRON, AND OTHER METALS
Year: 1875

page_text: ETTERS PATENT to William Robert Lake, of the Firm of Haseltine,
Lake, & Co., Patent Agents, Southampton Buildings, London, for
the Invention of "AN IMPROVED COATING FOR IRON, AND OTHER METALS."
-A communication from abroad by David Robert Brownlow, and.
George Weedne Francis, both of Middletown, Connecticut, United
States of America.
caled the 25th March 1875, and dated the 29th January 1875.
PROVISIONAL SPECIFICATION left by the said William Robert Lake
at the Office of the Commissioners of: Patents, with his Petition,
on the 29th January 1875.
I, WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co.,
Patent Agents, Southampton Buildings, Loudon, do hereby declare tha
nature of the said Invention for "AN IMPROVED COATING FOR IRON AND
OTHER METALS,” a communication, to be as follows:
This Invention relates to an adhering coating for iron and other
metals composed of the ordinary slag from an iron furnace or its.
equivalent, and borax or other equivalent flux, by means of which the

page_text: -
metal is perfectly protected from the action of the air or of moisture,
and so that the metal can be subjected to a high degree of heat without
injury to itself or the said coating.
In carrying the said Invention into practice, when it is desirable to
form a coating for wrought iron, I take of ordinary slag produced by an
iron furnace one part by weight, and of borax seven parts; I place them
in a suitable vessel or retort, and by the application of heat to the
required degree, say, between 2,000 and 3,000 degrees Fahrenheit, reduce
them to a fluid condition; I then remove any impurities that may have
existed in the slag, and which will rise to the surface of the fluid mass;
I then thoroughly cleanse and deoxydize the surface of the iron, either
by an acid bath or otherwise, and then plunge the iron into the fluid, so
that it is entirely immersed therein. The temperature of the mass when
thus melted will act to bring the surface of the iron being coated to the
point at which a perfect union and cohesion of the particles of the
surface of the iron and the particles of the mass take place, and the iron
should remain immersed until the required coating by the fluid shall
have been effected. This result will be secured by allowing the iron to
remain in the fluid about two minutes. The iron thus treated should
then be taken out, and any surplus of the fluid permitted to drip off;
that which remains upon the iron should be allowed to coat and harden
when the coating is completed.
In coating cast iron or metals other than wrought iron it is necessary
to increase or decrease, as the case may be, the proportion of borax to
the slag to such an extent as will enable the slag to be kept in a fluid
state at such a temperature as will act to bring the surface of the metal
just to the point to cause the union between the fluid and the surface
of the metal to be effected, as herein-before stated. The heat of the fluid
will not act to fuse the metal on its being immersed in the fluid.
When the slag of an iron furnace cannot be readily obtained tho
equivalent thereof for this coating may be obtained by taking equal
parts by weight of sulphuret of iron, arsenic, and plumbago, and by
adding to one part of them by weight seven parts of borax, and pro-
ceeding as heroin-before set forth, the aforesaid coating will be formed.
Any desired colour may be given to the said coating by tlic addition
to the composition of the proper colouring matter.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Robert Lake in the Great Seal Patent
Office on the 22nd July 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London, send greeting.
ས
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-ninth day of January, in the
year of our Lord One thousand eight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Robert Lake, Her special
licence that I, the said William Robert Lake, my executors, admini-
strators, and assigns, or such others as I, the said William Robert
Lake, my executors, administrators, and assigns, should at any time
agree with and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention for "AN
IMPROVED COATING FOR IRON AND OTHER METALS," a communication to mo
from abroad by David Robert Brownlow and George Wcedne Francis,
both of Middletown, Connecticut, United States of America, upon the
condition (amongst others) that I, the said William Robert Lake, my
executors or administrators, by an instrument in writing under my,
or their, or one of their hands and seals, should particularly describe
and ascertain the nature of the said Invention, and in what manner.
the same was to be performed, and cause the same to be filed in the
Great Seal Patent Office within six calendar months next and imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Robert Lake, do hereby,
declare the nature of the said 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 consists in an adhering coating for iron and other
metals composed of the ordinary slag from an iron furnace or its
equivalent; and borax or other equivalent flux, by means of which the
metal is perfectly protected from the action of the air or of moisture, so

page_text: Having thus fully. described the said Invention, as communicated to
me by my foreign correspondents, and the manner of performing the
same, I wish it understood that I claim, a coating for iron and other
metals, consisting of slag and borax melted and applied, substantially as
described.
In witness whereof, I, the said William Robert Lake, have here-
unto set my hand and seal, this Twenty-second day of July, in
the year of our Lord One thousand eight hundred and seventy-
five.
Witness,
JAS. EDWARDS,
8, Southampton Buildings,
London.
W. ROBT. LAKE. (L.S.)