IMPROVEMENTS IN CONSTRUCTING BRIDGES, VIADUCTS, AND SUCH LIKE STRUCTURES
Year: 1852

page_text: LETTERS PATENT to Moses Poole, of Serle Street, in the County of
Middlesex, Gentleman, for the Invention of "IMPROVEMENTS IN
CONSTRUCTING BRIDGES, VIADUCTS, AND SUCH LIKE STRUCTURES."—A
communication.
Sealed the 30th March 1853, and dated the 2nd October 1852..
PROVISIONAL SPECIFICATION left by the said Moses Poole at
the Office of the Commissioners of Patents, with his Petition,
on the 2nd October 1852.
I, MOSES POOLE, of Serle Street, in the County of Middlesex,
Gentleman, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN CONSTRUCTING BRIDGES, VIADUCTS, AND SUCH LIKE
STRUCTURES," to be as follows:
This Invention is a communication from France on behalf of
M. Vergnias, & consists of suspending a roadway or platform by
means of compound arches composed of sections made of cast iron, the
curved plates used in making the arches having projecting ribs inter-
mediate of their width. The compound arches preventing undulation,
and the projecting ribs preventing oscillation.
The Invention consists of the combination of these two systems.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Moses Poole in the Great Scal Patent Office,
on the 2nd April 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
MOSES POOLE, of Serle Street, in the County of Middlesex, Gentleman,
send "greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Second day of October, in the year
of our Lord One thousand eight hundred and fifty-two, in the six-
teenth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Moses Poole, Her special
license that I, the said Moses Poole, my executors, administra-
tors, and assigns, or such others as I, the said Moses Poole,
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 CONSTRUCTING BRIDGES, VIADUCTS, AND SUCH LIKE
STRUCTURES," upon the condition (amongst others) that I, the said
Moses Poole, by an instrument in writing under my hand and seal,
should particularly describe and ascertain the nature of the said Inven-
tion, 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 Moses Poole, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement thereof (that is to say):
This Invention is a communication from France on behalf of
Monsieur Vergnias, and consists of suspending a roadway or platform
by means of compound arches composed of sections made of cast iron,
the curved plates used in making the arches having projecting ribs
intermediate of their width. The compound arches preventing undu-
lation, and the projecting ribs preventing oscillation.

page_text: according to this Invention; they are all of the same length, but
Figure 1, consists, of three compound arches, Figure 2, of two; and
Figure 3, of only one. The same letters indicate the same parts in.all
the Drawings.
E, is the main arch, extending from pier to pier; it is constructed of
sections of cast iron, which are bolted together.
D, D, show the secondary arches, which are so placed and applied
as to carry the two ends of the platform H, and at the same time to
strengthen the main arch, and to prevent pressure at the centre, causing
it to rise at the haunches.
F, F, shew the intermediate piers, and G, G, the land piers. H, is
the platform which carries the roadway.
I, are the bars by which it is suspended from the arches.
J, is the balustrade, which may be either of iron or wood.
The details of the parts are shown in Sheet 2, K, No. 1, shewing a
side view of one of the sections, of a size suitable for the bridge.
Figure 1, K, No. 2, is an end view, showing distinctly the strength-
ening rib Q, attached.
K, No. 3, shows either a plan or side view of the same parts.
Figures L, Nos. 1, 2, and 3, X, M, Nos. 1, 2, and 3, shew respec-
tively similar parts of the bridges, Figures 2, and 3.
N, is a transverse section of the bridge, Figure 3, showing the parts
in their places.
It will be observed that in this bridge there are two arches, E, E, on
each side, but this is only necessary when the span is large.
S, is one of the cross beams which connect the side arches to-
gether at intervals.
V, is the platform which supports the roadway; it is constructed of

page_text: wrought iron plates, which should, when practicable, be of a length
equal to the width of the bridge; they are rolled with ribs, and bent
while hot to the curve required; the ribs, which are intended to stiffen
the plates, run transversely across the bridge. There are tie bars Y,
connecting the two sides of the bridge, and forming cords to the curve
of the platform V.
Z, is a hook which connects the tie bar Y, to the centre of the plat-
form V.
P, is the roadway, which is laid on the platform V.
T, T, are the footways, which are supported by X, X, which are
continuations of the balustrade J.
Having thus described the nature of the Invention, and the manner
of performing the same, I would have it understood that what I claim
is, the combining arches E, and D, and constructing them in the
manner herein explained...
In witness whereof, I, the said Moses Poole, have hereunto set
my hand and seal, this Twenty-eighth day of March, iii the
year of our Lord One thousand eight hundred and fifty-three.
Witness,
B. GOBEY.
MOSES POOLE. (L.S.)