IMPROVEMENTS IN THE CONSTRUCTION OF SHIPS, BOILERS, BUOYS, CASKS, AND OTHER ARTICLES BY WELDING TOGETHER THE PLATES OR PARTS OF WHICH THEY ARE FORMED
Year: 1869

page_text: PROVISIONAL SPECIFICATION left by Daniel Evans at the Office
of the Commissioners of Patents, with his Petition, on the 31st
May 1869.
I, DANIEL EVANS, of No. 18, Charles Terrace, Casland Road, South
Hackney, in the County of Middlesex, Engineer, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF
SHIPS, BOILERS, BUOYS, CASKS, AND OTHER ARTICLES BY WELDING TOGETHER THE
PLATES OR PARTS OF WHICH THEY ARE FORMED," to be as follows:-
This Invention has for its object improvements in the construction
of ships, boilers, buoys, casks, and other articles by welding together
the plates or parts of which they are formed.
In constructing ships I employ plates of iron or steel flanged at the
edges on one or both sides, and I weld the flanges of the plates together;
or I cause the plates to meet with a butt or a lap joint. I cover the
joint with a flangeless plate or wide bar, either at the front or back, or
on both sides, and I weld the whole together. The welded joints of
other articles of iron and steel may be made in this manner. When
connecting tubes end to end with welded joints I form circumferential

page_text: flanges on the ends to be connected, and weld these flanges together.
I form a very stiff structure suitable for armour plating and for other
purposes by taking a number of lengths of trough iron and welding
them together side by side by their flanges, which then form strength-
ening ribs running from end to end of the structure. In articles in
which plates of iron or steel micet at an angle I cover the joint either
Internally or externally with an angle iron and weld the wholo
together.
I construct buoys and similar articles of iron and steel by welding
up two cones from discs, from which a segment is cut, then flanging
them outwards around the base and welding the said flanges together;
or a disc may be introduced between the two cones and be welded up
with them so as to form a bulkhead, dividing the buoy into two com-
partments. Spherical buoys may be welded up in a similar manner.
I make upright boilers with welded joints. The cylinder which
forms the fire-box is expanded at its lower edge to the size of the outer
shell, and the two thicknesses are then welded together; or a ring may
be inserted between the two and the whole welded together. For the
aperture for the fire-door the fire-box cylinder is similarly enlarged
until it meets the shell, and then a welded joint is made: The ends
may be welded into the fire-box and shell by flanging both the cylinder
and the end outwards, and welding the flanges together. The flue may
be inserted into holes in the ends, which are flanged and welded to
the sides of the fluc.
In making casks and buoys I form the head with a cylindrical flange
around it just fitting into the barrel of the cask, and I weld this flange
to the edges of the cylinder all round. The longitudinal joint of the
barrel I form by means of external flanges on the edges, which I weld
together, or I butt or lap the joint, cover it with a bar or plate, and
weld the whole together. In welding the flanges or parts together I
employ a jet of creosote and air or steam under pressure, and I throw
this jet in an ignited state on to the parts to be heated, and so rapidly
raise them to a welding heat.