AN IMPROVED APPLI- CATION OF CERTAIN KNOWN MATERIALS TO BE USED IN THE ANNEALING OF CAST IRON TO PRODUCE MALLEABLE IRON."
Year: 1871

page_text: LETTERS PATENT to Matthew Tildesley, of Willenhall, in the County
of Stafford, Ironfounder, for the Invention of "AN IMPROVED APPLI-
CATION OF CERTAIN KNOWN MATERIALS TO BE USED IN THE ANNEALING OF CAST
IRON TO PRODUCE MALLEABLE IRON."
PROVISIONAL SPECIFICATION left by the said Matthew Tildesley at
the Office of the Commissioners of Patents, with his Petition, on
the 6th December 1871.
I, MATTHEW TILDESLEY, of Willenhall, in the County of Stafford,
Ironfounder, do hereby declare the nature of the said Invention for
"AN IMPROVED APPLICATION OF CERTAIN KNOWN MATERIALS TO BE USED IN THE
ANNEALING OF CAST IRON TO PRODUCE MALLEABLE IRON," to be as follows:-
Instead of embedding the cast iron in haematite iron ore, as is usually
done in the preparation of malleable iron by the annealing process, I use
the following materials, either singly or mixed, namely, a material
popularly known as "purple ore," being the residue from cupreous

page_text: sulphur ore or pyrites after burning for the sulphur and treatment for
extracting copper, and (I use) burnt iron pyrites either in the usual
state, when admissable, or when necessary after further extraction of
sulphur. The said "purple ore" and burnt iron pyrites are employed in
the process of annealing in a similar manner to the haematite iron ore
and the cast iron imbedded therein.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Matthew Tildesley in the Great Seal Patent Office
on the 6th June 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MATTHEW
TILDESLEY, of Willenhall, in the County of Stafford, Ironfounder, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Sixth day of December, in the year
of our Lord One thousand eight hundred and seventy-one, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Matthew Tildesley, Her special licence
that I, the said Matthew Tildesley, my executors, administrators, and
assigns, or such others as I, the said Matthew Tildesley, 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
APPLICATION OF CERTAIN KNOWN MATERIALS TO BE USED IN THE ANNEALING OF
CAST IRON TO PRODUCE MALLEABLE IRON," upon the condition (amongst
others) that I, the said Matthew Tildesley, my executors or adminis-
trators, 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 per-
formed, and cause the same to be filed in the Great Seal Patent Office
within six calendar months next and immediately after the date of
the said Letters Patent.
NOW KNOW YE, that I, the said Matthew Tildesley, do hereby
declare the nature of my said Invention, and in what manner the

page_text: same is to be performed, to be particularly described and ascertained
in and by the following statement (that is to say)
My Invention has for its object the application of a cheaper and bettér
material to be used in annealing cast iron, and consists as follows :—
Instead of imbedding cast iron in haematito iron ore, as is usually
done in the preparation of malleable iron by the annealing process, I use
the following materials, either singly or mixed, namely, a material
popularly known as "purple ore," being the residue from cupreous
sulphur ore or pyrites after burning for the sulphur and treatment for
extracting copper, and (I use) burnt iron pyrites, either in the usual
state when thoroughly burnt or otherwise, after further extraction of
sulphur. The said ""purple ore" and burnt iron pyrites are employed
in the process of annealing cast iron in a similar manner to the haematite
iron ore, that is to say, the cast iron is imbedded therein and heat
applied in the usual manner.
Having now particularly described and ascertained the nature of my
said Invention, and in what manner the same may be performed, I
declare that I claim, the application of the said "purple ore" and burnt
iron pyrites, taken either singly or mixed, as herein-before described for
the purpose of annealing cast iron.
In witness whereof, I, the said Matthew Tildesley, have hereunto set
my hand and seal, this Fourth day of June, in the year of
our Lord One thousand eight hundred and seventy-two.
5 Witness,
STEPHEN WATKINS,
MATTHEW TILDESLEY. (L.S.)
Patent Office,
Wolverhampton.