IMPROVEMENTS IN FORMING WROUGHT-IRON BARS FOR THE MANUFACTURE OF ARMOUR PLATES AND OTHER ARTICLES OF FORGED IRON
Year: 1862

page_text: LETTERS PATENT to François Marrel, of Marseille, France, Iron Master,
for the Invention of "IMPROVEMENTS IN FORMING WROUGHT-IRON BARS FOR
THE MANUFACTURE OF ARMOUR PLATES AND OTHER ARTICLES OF FORGED
IRON."
Sealed the 10th October 1862, and dated the 5th May 1862.
COMPLETE SPECIFICATION filed by the said François Marrel at the Office
of the Commissioners of Patents, with his Petition and Declaration,
on the 5th May 1862, pursuant to the 9th Section of the Patent Law
Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FRANÇOIS
MARREL, of Marseille, France, Iron Master, send greeting.
WHEREAS I am in possession of an Invention of "IMPROVEMENTS IN
FORMING WROUGHT-IRON BARS FOR THE MANUFACTURE OF ARMOUR PLATES AND
OTHER ARTICLES OF FORGED IRON," and have petitioned Her Majesty to grant
unto me, my executors, administrators, and assigns, Her Royal Letters Patent
for the same.
NOW KNOW YE, that I, Francois Marrel, do hereby declare that the
following Complete Specification, under my hand and seal, fully describes
and ascertains the nature of the Invention and the manner in which the same
is to be performed, reference being bad to the accompanying Drawing, and to
the letters marked thereon, that is to say :-
My Invention consists in rolling iron bars with grooved flanges or pro-
jections of a peculiar shape for ensuring a strong joint between the bars when

page_text: employed for forming a pile for the manufacture of armour plates and other
articles of forged iron.
In order that my Invention may be better understood I refer to the
accompanying Drawing, in which Figure 1 shews a section of a bar with two
grooved flanges; Figure 2, a section of a bar with a single grooved flange;
Figure 3 exhibits two bars jointed together; Figures 4, 5, and 6, are modifi-
cations of the shape of the grooved flanges or projections; Figure 7 is an
end view in section of a number of bars placed together to form a pile.
A, A, Figures 1 and 2 show the form of grooved flange I employ by
preference. By placing these bars together, as shewn at Figure 3, and by
hammering them perpendicularly, the part A of the flange will be forced
to enter the groove B, and thus form a joint which ensures a perfect
welding. The form and dimensions of the groove may vary as shewn at
Figures 4, 5, and 6. To form a pile I take several rolled bars of the form
shewn at Figures 1 and 2, of different widths and in sufficient number to form
the pile of the size required for the article to be forged and arrange them as
shown at Figure 7, the forging or welding operation being carried on according
to the usual method. By the employment of this form of joint the separation
of the bars in the forging or welding process is prevented.
Having now described the nature of my said Invention and the manner of
carrying the same into effect I would have it understood that I do not claim as
new the uniting or forging of iron bars to form a pile, but what I do claim and
desire to be protected by Letters Patent is, the forming and arranging of
wrought-iron bars with grooved flanges or projections, whereby greater cohesion
is given to the bars of a pile, and separation of the bars in the hammering or
rolling process prevented, as herein-before described and represented in the
accompanying Drawing.
In witness whereof, I, the said François Marrel, have hereto set me
hand and seal, this Fifteenth day of April, in the year of our Lord
One thousand eight hundred and sixty-two.
F. MARREL. (L.S.)