IMPROVEMENTS IN GLAZING AND ENAMELLING THE SURFACES OF CAST IRON
Year: 1846

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME GREETING,
I, TIMOTHY KENDRICK, of West Bromwich, in the County of Stafford, Iron-
founder, send greeting
WHEREAS Her present most Gracious Majesty Queen Victoria, by Her
.Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Twenty-sixth day of May, in the ninth year of Her reign, did,
for Herself, Her heirs and successors, give and grant unto me, the said
Timothy Kenrick, my exors, adññiors, and assigns, Her especial licence, full
power, sole privilege and authority, that I, the said Timothy Kenrick, my
exors, adñiors, and assigns, and every of them, by myself and themselves, or by
my and their deputy or deputies, servants or agents, or such others as I, the
said Timothy Kenrick, my exors, adññors, or assigns, should at any time agree
with, and no others, from time to time and at all times thereafter during the
term of fourteen years from the date thereof next and immediately ensuing,
should and lawfully might make, use, exercise, and vend, within that part
of the United Kingdom of Great Britain and Ireland called England, the
Dominion of Wales, and Town of Berwick-upon-Tweed, and in Her said
Majesty's Islands of Jersey, Guernsey, Alderney, Sark, and Man, and also in
all Her said Majesty's Colonies and Plantations abroad, my Invention for
"IMPROVEMENTS IN GLAZING AND ENAMELLING THE SURFACES OF CAST IRON;" in
which said Letters Patent there is contamed a proviso that I, the said
Timothy Kenrick, shall particularly describe and ascertain the nature of my
said Invention, and in what manner the same is to be performed, by an instru-
ment in writing under my hand and seal, and cause the same to be enrolled

page_text: in Her said Majesty's Iligh Court of Chancery within six calendar months
next and immediately after the date of the said in part recited Letters Patent,
as, reference being thereunto had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, ], the said
Timothy Kenrick, do hereby declare the nature of my Invention to consist
in Certain Improvements in Glazing and Enamelling the Surfaces of Cast
Iron, and I do hereby describe the manner in which my said Invention is
to be performed by the following statement thereof (that is to say).-
Before the application of the enamel the vessel of cast iron must be well
cleaned, after which it is fit for the application of the enamel, which is
composed of two coatings, fist, a composition for the body, and secondly, a
composition for the glaze The first composition is made as follows-To
one hundred pounds of calcined flint ground into a fine powder, add seventy-
five pounds of borax ground fine, mix them well together and then fuse them,
when cooled, take forty pounds of the above and five pounds of potters' clay,
and grind them together in water and bang them into such a consistence as
that, when the article to be enamelled is dipped into it, a coating of about
one sixteenth of an inch is left on it, forming the first coating or body to
support the glaze. Let this set, and then the following or second composition
must be very evenly sifted over it whilst it is yet moist, namely, one hundred
pounds of Cornish stone ground to a powder, one hundred and seventeen
pounds of bolax ground fine, thirty-five pounds of soda ash, thirty-five pounds
of saltpetro, thirty-five pounds of sifted slaked lime, thirteen pounds of white
sand, fifty pounds of white glass pounded fine Let these materials be mixed
well together and then perfectly vitrified, when cool, they must be ground
very hinc in water and afterwards dried; then take forty-five pounds thereof,
and one pound of soda ash, mix them together well in hot water, stiring
them well; then dry them in a stove, and a fine powder will be produced.
When the powder has been very evenly sifted over the first composition, the
miticle must be put in a stove at a temperature of about two hundred and
twelve degrees of Fahrenheit to dry it; after which the composition is fired
by placing the article in a kiln or muffle beated to a sufficient temperature to
fuze the glaze When the glaze is fused the article may be withdrawn and
examined, and if not perfect, a second coating of the glaze or second composi
tion must be evenly sifted over it whilst hot, and the article be again replaced
in the kiln until the glaze is fused. Foi enamelling the inside of non pipes,
which from their length or from their small diameter cannot have the glaze
powder sifted over them in the manner before described, I adopt the following
method: When the inside of the pipe is cleaned, I pour the first compo-

page_text: sition through the pipe, turning it round at the same time to ensure an even
coating upon every part. When this is set I pour the second composition or
glaze powder through the pipe, turning it round as before so that the powder
may cover every part of the first coating; it is then died and fired in the
manne heiein-before described.
And whereas the interior surfaces and rims of vessels of capacity of cast
on have been heretofore enamelled and glazed by the application of two
Coatings, one for the body and the other for the glaze, now I do hereby
leclare that I claim as my Invention the enamelling and glazing in the
manner herein-before mentioned of the exterior surfaces only of such vessels
of cast on.
And secondly, the enamelling and glazing of cast Italian irons, cast box
1ons, and cast-iron knobs for doors and other purposes
And thirdly, the enamelling and glazing of the inside of such cast-on
pipes, as aforesaid.
And lastly, the enamelling and glazing the ornamental surfaces of cast
iron
Aud I further declare that the exact proportions of the materials herein-
before mentioned for the recipes for the said two several coatings for the
enamel and the glaze are not essential but may be vaned, nevertheless [
consider such proportions to be the best that can be employed.
In witness when cof, I, the said Timothy Kennick, have hereunto set
my hand and seal, this Twentieth day of November, in tho year of
our Lord One thousand eight hundred and forty-SIX.