IMPROVEMENTS IN THE MANUFACTURE OF ARTICLES FROM MALLEABLE CAST IRON
Year: 1856

page_text: LETTERS PATENT to Duncan Morrison, of Bordesley Works, Birmingham,
for the Invention of "IMPROVEMENTS IN THE MANUFACTURE OF ARTICLES
FROM MALLEABLE CAST IRON."
Sealed the 28th November 1856, and dated the 4th June 1856.
PROVISIONAL SPECIFICATION left by the said Duncan Morrison at the
Office of the Commissioners of Patents, with his Petition, on the 4th June
1856.
I, DUNCAN MORRISON, of Bordesley Works, Birmingham, do hereby declare
the nature of the Invention for "IMPROVEMENTS IN THE MANUFACTURE OF ARTICLES
PROM MALLEABLE CAST IRON," to be as follows:-
Heretofore numerous articles have been cast in a description of iron known
as malleable cast iron; that is to say, iron which, after casting, may be
annealed, as is well understood; and when casting these articles, sand moulds
have until the present time been employed.
Now my Invention consists in the use of metal moulds when casting articles
from this description of iron, by which the articles may be cast with greater.
rapidity and with a less expenditure of labour than heretofore.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Duncan Morrison in the Great Seal Patent Office on the
4th December 1856.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DUNCAN
MORRISON, of Bordesley Works, Birmingham, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Ier Letters
Patent, bearing date the Fourth day of June, in the year of our Lord One
thousand eight hundred and fifty-six, in the nineteenth year of ler reign,
did, for Herself, Fler heirs and successors, give and grant unto me, the said
Duncan Morrison, Iler special licence that I, the said Duncan Morrison, my
executors, administrators, and assigns, or such others as I, the said Duncan
Marrison, 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 "IMPROVEMENTS IN THE MANUFACTURE OF
ARTICLES PROM MALLEABLE CAST IRON," upon the condition (amongst others) that
J, the said Duncan Morrison, my executors or administrators, by an instrument
in writing under my, or their, or one of their hands and seals, should par-
ticularly 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 immediately
after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Duncan Morrison, do hereby declare
the nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say:
Heretofore numerous articles have been cast in a description of iron known
as malleable cast iron; that is to say, iron which, after casting, may be
annealed, as is well understood; and when casting these articles, sand moulds
have until the present time be employed.
Now my Invention consists in the use of metal moulds when casting articles
from this description of iron, by which the articles may be cast with greater
rapidity and with a less expenditure of labour than heretofore.
Having thus stated the nature of my said Invention, I will proceed to
describe the manner in which the same is performed.
Ieretoforo in manufacturing articles of what is known as malleable cast

page_text: iron (that is, iron which can be cast into form and then brought into a soft
state by annealing), it has been usual to employ sand moulds.
Now, according to my Invention I make use of moulds of metal, by pre-
ference of cast iron, and each mould of two or more parts, according to the
nature of the article to be cast therein. I make the parts of each mould to
fit accurately together, and the interior surfaces I make very smooth. When
using such moulds, I either smoke the interior surfaces or I brush the interior
surface over with black lead, and I heat such moulds to a low black heat before
running in the metal. By thus employing metal moulds the same may be used
again and again, and the articles cast therein will not only be more smooth,
but a considerable saving will result in not having to make a new mould
for each article to be cast.
In witness whereof, I, the said Duncan Morrison, have hereunto set my
hand and seal, this Third day of December, in the year of our Lord
One thousand eight hundred and fifty-six.
Witness,
GEO. PITT,
24, Southampton Buildings.
DN MORRISON. (L.S.)