IMPROVE- MENTS IN THE MANUFACTURE OF WROUGHT METAL PILES, COLUMNS, AND SHAFTS
Year: 1863

page_text: LETTERS PATENT to Joseph Emerson Dowson, of 88, Dowgate Hill,
Thames Street, in the City of London, for the Invention of "IMPROVE-
MENTS IN THE MANUFACTURE OF WROUGHT METAL PILES, COLUMNS, AND
SHAFTS."
Sealed the 19th June 1868, and dated the 2nd January 1868.
PROVISIONAL SPECIFICATION left by the said Joseph Emerson Dowson
at the Office of the Commissioners of Patents, with his Petition, on the
2nd January 1863.
I, JOSEPH EMERSON DOWSON, of 88, Dowgate Hill, Thames Street, in the
City of London, do hereby declare the nature of the Invention for "IMPROVE-
MENTS IN THE MANUFACTURE OF WROUGHT METAL PILES, COLUMNS, AND SHAFTS,"
to be as follows:-
This Invention has for its object improvements in the manufacture of
wrought metal piles, columns, and shafts. For these purposes, in forming
sheets of metal suitable for the purposes of this Invention, each edge of a
plate is rolled or formed with an interior flange or rib, and, by preference, of
such exterior form at the butting edges, that when the edges of two plates.
butt together, the joint between them shall not be a plain or straight line.
On the contrary, one butting face is made hollow, undulating, or concave,
whilst the other is made undulating or convex to fit the hollow, undulating, or
concave face of the neighboring plate, though this is not essential, as plain
or flat butting surfaces may be formed to the flanges.

page_text: A series of longitudinal plates such as above described are used in producing
a pile, column, or shaft. The outside surfaces of the plates may be flat, or
they may be convex, or otherwise, according to the external form intended to
be given to a pile, column, or shaft composed of a number of such plates.
The plates forming a pile, column, or shaft are bound together by metal bands
fixed externally, which may be shrunk on, or they may be welded on, or they
may be otherwise fixed tightly round in any suitable manner so as to hold the
series of butting plates of which a pile, column, or shaft is composed securely
together, or the plates of which a pile, column, or shaft is composed may be
combined or held together in any other convenient manner. In those cases
where a pile, column, or shaft is to be fixed externally to any part of another
structure, an external flange or flanges may be made to one or more of the
longitudinal plates, so as to admit of such outer flange or flanges being fixed
to an external structure.
In some cases it is desirable to fix a screw shaft to the lower end of a hollow
pile, column, or shaft made of wrought 'iron, in which case the upper end of
the screw shaft may be fixed directly to the lower ends of the hollow wrought-
iron pile, column, or shaft, by welding or otherwise, or a suitable casting may
be applied to and fixed in the end of a wrought-iron pile, colunin, or shaft
suitable for receiving and having fixed therein the upper end of a screw shaft,
or, it may be, of any other shaft.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Joseph Emerson Dowson in the Great Seal Patent Office on
the 2nd July 1863.
17. 4
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPH
EMERSON DOWSON, of 38, Dowgate Hill, Thames Street, in the City of
London, send greeting..
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Second day of January, in the year of our Lord One
thousand eight hundred and sixty-three, in the twenty-sixth year of Her reign,
did, for,Herself, Her heirs and successors, give and grant unto me, the said
Joseph-Emerson Dowson, Her special licence that I, the said Joseph Emerson
Dowson, my executors, administrators, and assigns, or such others as I, the
said Joseph Emerson Dowson, 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

page_text: 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 WROUGHT METAL PILES, COLUMNS,
AND SHAFTS," upon the condition (amongst others) that I, the said Joseph
Emerson Dowson, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and seals, should parti-
cularly 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 Joseph Emerson Dowson, 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 has for its object improvements in the manufacture of
wrought metal piles, columns, and shafts. For these purposes, in forming
sheets of metal suitable for the purposes of this Invention, each edge of a
plate is rolled or formed with an interior flange or rib, and, by preference, of
such exterior form at the butting edges, that when the edges of two plates
butt together, the joint between them shall not be a plain or straight line.
On the contrary, one butting face is made hollow, undulating, or concave,
whilst the other is made undulating or convex, to fit the hollow, undulating,
or concave face of the neighbouring plate, though this is not essential, as plain
or flat butting surfaces may be formed to the flanges.
A series of longitudinal plates, such as above described, are used in pro-
ducing a pile, column, or shaft: The outside surfaces of the plates may be
flat, or they may be convex or otherwise, according to the external form
intended to be given to a pile, column, or shaft composed of a number of such
plates. The plates forming a pile, column, or shaft are bound together by
metal bands fixed externally, which may be shrunk on, or they may be welded
on, or they may be otherwise fixed tightly round in any suitable manner so
as to hold the series of butting plates of which a pile, column, or shaft is
composed securely together, or the plates of which a pile, column, or shaft
is composed may be combined or held together in any other convenient
manner. In those cases where a pile, column, or shaft is to be fixed exter-
nally to any part of another structure an external flange or flanges may be
made to one or more of the longitudinal plates so as to admit of such outer
flange or flanges being fixed to an external structure.
In some cases it is desirable to fix a screw shaft to the lower end of a

page_text: hollow pile, column, or shaft made of wrought-iron, in which case the upper
end of the screw shaft may be fixed directly to the lower ends of the hollow
wrought-iron pile, column, or shaft by welding or otherwise, or a suitable
casting may be applied to and fixed in the end of a wrought-iron pile, column,
or shaft suitable for receiving and having fixed therein the upper end of a
screw shaft, or, it may be, of any other shaft.
In witness whereof, I, the said Joseph Emerson Dowson, have hereunto
set my hand and seal, this Second day of July, in the year of our Lord
One thousand eight hundred and sixty-three.
JOSEPH EMERSON DOWSON. (L.S.)