A NEW OR IMPROVED METHOD OF COATING WITH GLASS OR ENAMELLING SURFACES OF CAST IRON
Year: 1856

page_text: LETTERS PATENT to Thomas Clutton Salt, of Birmingham, in the County
of Warwick, Manufacturer, for the Invention of "A NEW OR IMPROVED
METHOD OF COATING WITH GLASS OR ENAMELLING SURFACES OF CAST IRON."
METHOD OF COATING WITH GLASS OR ENAMELLING SURFACES OF CAST IRC
Sealed the 16th January 1857, and dated the 29th October 1856.
PROVISIONAL SPECIFICATION left by the said Thomas Clutton Salt
at the Office of the Commissioners of Patents, with his Petition, on the
29th October 1856.
I, THOMAS CLUTTON SALT, of Birmingham, in the County of Warwick,
Manufacturer, do hereby declare the nature of the said Invention for "A
NEW OR IMPROVED METHOD OF COATING WITH GLASS OR ENAMELLING SURFACES OF
CAST IRON," to be as follows:-
My Invention consists of the process or processes, herein-after described, of
enamelling cast iron, or coating it with glass, by the use of pounded enamel or
glass applied to the surface of the said cast iron by means of gum water, or
other adhesive matter, and afterwards fused.
In carrying my Invention into effect, I first clean the surface of the cast
iron by turning, filing, scouring, or otherwise; I then apply a thin coating of
gum water or other adhesive solution to the said surface, by sponging or brush-
ing the said solution upon the said surface. While the surface is still damp,
the powder herein-after described as mixture No. 1 is then dusted on the
surface. The article is then heated until the powder fuses, when a uniform

page_text: grey vitreous surface is produced. If a white surface is required, a second
coating of the adhesive solution must then be given, and the powder hercin-
after described as mixture No. 2 is dusted over it, and the article is again
heated until the composition fuses.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Clutton Salt in the Great Seal Patent Offico on
the 27th April 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS 80
CLUTTON SALT, of Birmingham, in the County of Warwick, Manufacturer,
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Clutton Salt in the Great Seal Patent Office on
the 27th April 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS 80
CLUTTON SALT, of Birmingham, in the County of Warwick, Manufacturer,
-cond-greeting
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-ninth day of October, in the year of our

page_text: Lord One thousand eight hundred and fifty-six, in the twentieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Thomas Clutton Salt, Her special licence that I, the said Thomas Clutton
Salt, my executors, administrators, and assigns, or such others as I, the said
Thomas Clutton Salt, my executors, administrators, and assigns, should at any
time agree with, and no others, from time to time and at all times there-
after 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 "A NEW
OR IMPROVED METHOD OF COATING WITH GLASS, OR ENAMELLING SURFACES OF CAST
IRON," upon the condition (amongst others) that I, the said Thomas Clutton
Salt, my executors or administrators, by an instrument in writing under my,
or their, or one of their hands and seals, should particularly describe and ascer-
tain 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 calender months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said Thomas Clutton Salt, do hereby declaro
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 thereof, that is to say :-
My Invention consists of the process or processes, herein-after described, of
enamelling cast iron, or coating the said cast iron with glass; the said
enamelling or coating being effected by the use of pounded glass enamel
applied to the surface of the said cast iron by means of gum water, or other.
adhesive matter, and afterwards fused.
In carrying my Invention into effect, I first clean the surface of the cast iron
by turning, filing, scouring, pickling, or otherwise; I then apply a thin coating
of gum water or other adhesive solution to the said surface, by sponging or
brushing the said solution upon the said surface. While the surface is still
damp, one of the enamel powders herein-after described as grey mixtures is
dusted on the surface. The article is then heated in a suitable muffle or
furnace until the powder fuses, when a uniform grey vitreous surface is pro-
duced. If a white surface is required, a second coating of the adhesive solution
must be applied, and one of the enamel powders herein-after described as
white mixtures dusted over it. The article is then heated until the composition
last applied fuses.
The following are two compositions of grey mixture:—

page_text: In making the above mixtures, the materials are pounded and intimately
mixed and afterwards fused. The enamel produced is pounded and used in
the manner herein-before described.
The compositions described as grey mixtures produce a colourless or nearly
colourless enamel, which has a grey appearance when applied to iron, owing
to the grey color of the iron underneath the said enamel. The compositions
described as white mixtures are opaque or semi-opaque white enamels.
Where a grey colour is required the grey mixture only is applied, and where
a white surface is required the grey mixture is first applied and afterwards the
white mixture, as described.
Having now described the nature of my said Invention, and the manner of
carrying the same into effect, I wish it to be understood that I do not limit
myself to the precise details herein described, as the same may be varied
without departing from the nature of my said Invention; but I claim as my
Invention,-
Firstly, the new or improved method of coating with glass or enamelling
surfaces of cast iron, herein-before described, that is to say, applying powdered
glass or enamel to cast iron previously wetted with water, or solution of gum
arabic, or other adhesive solution, and subsequently fusing the glass or enamel
direct on the surface of the cast iron, as herein-before described.
Secondly, the compositions of grey and white enamel, herein described, and
such modifications of the same, to be applied as described, as will unite with
the surface of cast iron or adhere strongly thereto when applied and fused
thereon, in the manner before described.
In witness whereof, I, the said Thomas Clutton Salt, have hereunto
set my hand and seal, this Twenty-fifth day of April, in the year of
our Lord One thousand eight hundred and fifty-seven.
Witness,
BENJAMIN BAUGH.
THOMAS CLUTTON SALT. (L.B.)