IMPROVEMENTS IN WROUGHT IRON AND STEEL PILES, PILLARS, AND COLUMNS
Year: 1868

page_text: PROVISIONAL SPECIFICATION left by Charles John Galloway at
the Office of the Commissioners of Patents, with his Petition, on
the 22nd February 1868.
I, CHARLES JOHN GALLOWAY, of Manchester, in the County of
Lancaster, Engineer, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN WROUGHT IRON AND STEEL PILES, PILLARS, AND COLUMNS,"
to be as follows -
Wrought-iron piles and pillars have heretofore been constructed
either solid or they have been divided longitudinally into two halves,
bolted or rivetted together by means of external flanges, which latter
arrangement is inconvenient for screwing into the ground in the case
of piles, and is unsightly in the case of columns.
Now my present Invention consists in forming wrought-iron and
steel piles, pillars, or columns in halves and securing these together
without the employment of such before-mentioned projecting flanges. For
this purpose in one arrangement I roll two plain semi-cylindrical halves,
and after placing them together so that the edges meet, I securely

page_text: bind them together by means of wrought-iron hoops or bands fixed
on at certain distances apart along the length of the pile or pillar.
In another arrangement I form the halves with the meeting edges
somewhat widened outwards or inwards, and I form along the edges
of the one half undercut or dovetail tongues and upon the other
half either undercut or dovetail grooves or undercut rebates, into
which the tongues of the other half are fitted by the two halves
being slidden together lengthwise.
In another arrangement the edges of the two halves are made to
overlap each other, and they are secured together either by rivetting
or by screws passing through the metal of the one half and tapped
into the other half. For securing lengths of piles or pillars together
end to end, if the halves are formed as first described, I either fix flanges
thereto by forcing an annular projection formed on the face of a separate
flange into a corresponding annular recess cut round the inner surface
of the two halves of the pile or pillar, close to the end thereof, and
these are then secured together externally by a hoop. This arrange-
ment may also be employed for fixing on the heads of columns.
In another arrangement a cylindrical core having two annular
projections is forced into corresponding annular recesses formed in the
contiguous ends of the two lengths of piles or pillars, and these are
then secured by a hoop driven on externally over the joint and held
there if requisite by keys or set screws.
In another arrangement I rivet projecting strips of metal on the
inside of the contiguous ends in such a manner that one or more
strips from each end project into the other end, and such projecting
ends having slotted holes formed in them corresponding with other
slotted holes formed in the ends of the two lengths; I drive keys
through such slotted holes so as to draw the ends of the two lengths
securely together.
In another arrangement I place either a cylindrical core passing
inside the meeting ends of each of the lengths or a sleeve covering
the two meeting ends on the outside, which core or sleeve has slotted
holes corresponding with other slotted holes in each of the two ends,
so that by driving keys into such slots the two lengths are drawn

page_text: firmly together. Caps may also be fitted on the piles or pillars by
forming upon the cap a projection fitting either into or over the end
of the pile or pillar, and driving keys or pins through slots or holes
formed in both parts.