IMPROVEMENTS IN THE MANUFACTURE OF SHEET IRON
Year: 1866

page_text: LETTERS PATENT to George Haseltine, of the "International Patent
Office," No. 8, Southampton Buildings, Chancery Lane, in the County
of Middlesex, Civil Engineer, for the Invention of "IMPROVEMENTS
IN THE MANUFACTURE OF SHEET IRON."-A communication from abroad by
Richard Norton Allen and Charles Chauncey Hinsdale, both of Cleveland,
Ohio, United States of America.
COMPLETE SPECIFICATION filed by the said George Haseltine at
the Office of the Commissioners of Patents, with his Petition and
Declaration, on the 20th April 1866, pursuant to the 9th Section of
the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
HASELTINE, of the "International Patent Office," No. 8, Southampton Buildings,
Chancery Lane, in the County of Middlesex, Civil Engineer, send greeting.
WHEREAS I am in possession of an Invention for "IMPROVEMENTS
IN THE MANUFACTURE OF SHEET IRON," and have petitioned Her Majesty to
grant unto me, my executors, administrators, and assigns, Her Royal Letters
Patent for the same, and have made solemn Declaration that the same
has been communicated to me from abroad by Richard Norton Allen and
Charles Chauncey Hinsdale, both of Cleveland, Ohio, United States of
America.

page_text: NOW KNOW YE, that I, the said George Haseltine, do hereby declare
that the following Complete Specification, under my hand and seal, fully
describes and ascertains the nature of the said Invention, and in what manner
the same is to be performed in and by the following statement :-
The nature of the said Invention consists in making sheet iron in such a
manner that the surface is covered during the process of manufacture with a
hard, compact, and smooth enamel of steel, thereby rendering the sheets
stronger and capable of resisting the process of oxydation much longer than
that manufactured in the ordinary manner, besides adding greatly to the
beauty and durability of articles manufactured therefrom.
In the accomplishment of this object I first make up "a pile" in the
usual manner, to both top and bottom of which I add a bar or plate of steel
the length and width of the pile. The pile is then heated to the proper
degree for welding and passed between rollers, and thus reduced to a bar of
the desirable width and thickness. Bars thus formed are next cut into lengths
proportionate to the width of the sheets that are to be made therefrom. These
bars are again heated and passed between rollers longitudinally, and this
operation is repeated until plates are formed of the desired thickness for sub-
sequent rolling in a series of plates or singly. These plates are then subject
to the action of a chemical bath for the purpose of removing the scale formed
by the previous heating and rolling. This bath may be composed of dilute
mineral acids. After the plates come from the bath they are washed in clean
water to remove the acids, &c. A series of plates thus scaled, say ten, more
or less in number, are then piled together and brought to a dull red heat in a
suitable furnace, and in this piled condition again passed between rollers, and
thus reduced to the desired thickness, the sheets coming out finished and
presenting a smooth and polished surface on both sides. The sheets may be
rolled to the desired thickness before they are placed together and rolled in a
series as before stated, as the smooth polished surface is obtained principally
by the last method of rolling.
In making up the pile, if the plate or bar of steel is placed only upon one
side, the finished sheets will have the enamel only upon one side, but the
manipulation will be the same in both cases.
Having thus fully described the said in provements as communicated to me
from my foreign correspondents, and shown how the same may be conveniently
and advantageously carried into operation, I claim as my Invention,-
First, making sheet-iron plates by piling and rolling in the manner sub-
stantially as set forth.

page_text: Second, the piling of iron with a plate of steel upon one or both sides, for
the purpose set forth.
In witness whereof, I, the said George Haseltine, have hereunto set my
hand and seal, this Twentieth day of April, in the year of our Lord
One thousand eight hundred and sixty-six.
GEORGE HASELTINE. (L.s.)