IMPROVEMENTS IN CORRUGATED WROUGHT-IRON AND AND RUFEDENISRIDGESEHOUS BUILDING
Year: 1875

page_text: LETTERS PATENT to Joseph Westwood and Robert Baillie, both of
the London Yard, Poplar, in the County of Middlesex, Engineers,
"
for the Invention of IMPROVEMENTS IN CORRUGATED WROUGHT-IRON
AND AND RUFEDENIS "
Scaled the 2nd April 1875, and dated the 29th January 1875.
PROVISIONAL SPECIFICATION left by the said Joseph Westwood and
Robert Baillic at the Office of the Commissioners of Patents,
with their Petition, on the 29th January 1875.
We, JOSEPH WESTWOOD and ROBERT BAILLIE, both of the London
Yard, Poplar, in the County of Middlesex, Engineers, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN CORRUGATED WROUGHT-
IRON PLATES FOR BRIDGES, WAREHOUSES, AND OTHER BUILDINGS," to be as.
follows:-
Our Invention has reference to the manufacture of corrugated
wrought-iron plates adapted for the construction of floors for bridges,
warehouses, and other buildings. Corrugated iron plates as hitherto

page_text: constructed have been deficient in surface bearing for purposes of this
kind.
Now our Invention consists in making plates with increased surface
bearing by forming the top and bottom corrugations (or parts of
corrugations) flat and extended, and the sides thereof straight, and by
preference inclined outwards towards the bottom, thereby giving a
bearing at the bottom, and increased resisting power to the sides of the
corrugations with greater strength to the plate throughout. By this
mode of corrugating the plates space is afforded for the insertion of an
additional number of rivets, where the plates are joined together, and
where they are secured to girders or beams. .
.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Joseph Westwood and Robert Baillie in the
Great Seal Patent Office on the 29th July 1875.
TO ALL TO WHOM THESE PRESENTS SHALL. COME, we, JOSEPH
WESTWOOD and ROBERT BAILLIE, both of the London Yard, Poplar, in the
County of Middlesex, Engineers, send grecting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-ninth day of January, in the
year of our Lord One thousand cight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto us, the said Joseph Westwood and
Robert Baillie, Her special licence, that we, the said Joseph West-
wood and Robert Baillie, our executors, administrators, and assigns,
or such others as we, the said Joseph Westwood and Joseph Baillie,
our 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, excrcise, and vend, within tlie United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN CORRUGATED WROUGHT IRON PLATES FOR BRIDGES, WARE.
HOUSES, AND OTHER BUILDINGS," upon the condition (amongst others) that
we, the said Joseph Westwood and Robert Baillie, our executors or
administrators, by an instrument in writing under our, or their, or

page_text: 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 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 we, the said Joseph Westwood and Robert
Baillie, do hereby declare the nature of our said Invention, and in
what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement, reference being had
to the Drawing hereunto annexed and to the letters and figures marked
thereon (that is to say):
Our Invention of "Improvements in Corrugated Wrought-iron Plates
for Bridges, Warehouses, and other Buildings," has reference to the
manufacture of corrugated wrought-iron plates adapted for the construc-
tion of floors for bridges, warehouses, and other buildings. Corrugated
iron plates as hitherto constructed have been deficient in surface bearing
for purposes of this kind.
Now our Invention consists in making plates with increased surface
bearing by forming the top and bottom corrugations (or parts of
corrugations) flat and extended, and the sides thereof straight, and by
preference inclined outwards towards the bottom, thereby giving a
bearing at the bottom an increased resisting power to the sides of the
corrugations with greater strength to the plate throughout. By this
mode of corrugating the plates space is afforded for the insertion of an
additional number of rivets, where the plates are joined together, and
where they are secured to girders or beams.
Having thus stated the nature of the said Invention we will proceed to
describe more particularly in what manner the same is to be performed
by the aid of the accompanying Drawings, in which are, represented
different sizes of corrugated plates formed in the manner above referred
to
Figures 1, 2, 3, and 4, represent plates formed respectively with
different depths of corrugations; a, a, are the tops and bottoms of the
35 corrugations, and b, b, are the straight sides of the same which are

page_text: inclined outwards towards the bottom. The thickness of the plates can
also be varied to suit the purposes required.
The mode preferred for giving the required form to the plates is by
making two cast-iron shaping blocks (an upper and lower block), and
placing between them the plate which has been previously heated in a
furnace, then by the application of hydraulic pressure the required form
is easily and quickly given to the plate. Our Invention is not however
confined to this mode of bending the plates, as this operation may be.
otherwise performed. The alteration of form represented and described
is adapted to insure greater strength and rigidness, and a greater amount
of bearing on the girders or walls to which the plates are applied and
fastened, and an improved bed for containing the concrete used.
.
Having thus described the nature of the said Invention and in what
manner the same is to be performed, we hereby declare that what we
claim as of our Invention is, the construction or formation of corrugated
iron plates with corrugations having flat tops and bottoms and straight
sloping sides for the purposes described.
In witness whereof, we, the said Joseph Westwood and Robert
Baillie, have hereunto set our hands and seals, the Twenty-eighth
day of July, in the year of our Lord One thousand eight hundred
and seventy-five.
Witness,
HENRY D. F. DOBSON,
9, Staple Inn,
Middlesex,
JOSEPH WESTWOOD. (L.S.) ·
ROBERT BAILLIE.
Clerk to Mess" Combe & Wainwright.
(L.S.)