Improvements in Joints of Malleable Metallic Tubes, Pipes, Flues, Boilers, and the like.
Year: 1887

page_text: Date of Application; 10th May, 1887.
Specification Accepted, 17th June, 1887.
Improvements in Joints of Malleable Metallic Tubes, Pipes, Flues,
Boilers, and the like.
1, THOMAS HENDERSON of No. 6 Hedley Street, Gosforth, Newcastle-on-Tyne,
County of Northumberland, Iron Shipbuilder do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
The Section's of the Tubes, Pipes, Flues, Boilers (and the like) are made in the form
(and the like) of a Cone, Solid; or Butted and Strapped. The large end of one Cone over-
lapping, the small end of another Cone, and constructed, so that the small end of one
Cone; fits exactly into the large end of another Cone, (the outside size of the small end of
one Cone will be the same as the inside size of the large end of another Cone) by pressing
or drawing the one into or over the other; until a tight joint is formed; by Hydraulic
or other power. See joint Fig. 1.
In the Butted Cones, the Strap if put on the outside of Cone at Butt, will have
to be cut short, on the small end of Cone to allow the large end of next Cone
to overlapp.
A short strap can be put on inside of small end of Cone; the Rivet or Bolt heads
on outside of small ends of Cones; and inside of large ends of Cones, to be made
flush; to allow the large end of one Cone, to overlapp the small end of another Cone.
If the strap is put on the inside of Cone at Butt; it will have to be cut short
on the large end of Cone; and a short strap put on the outside of large end of Cone.
If both sides of the Cone are strapped the outside strap; will be cut short at
the small end of Cones, and the inside strap will be cut short at the large end of
Cones; to allow the Cones to overlapp.
The Taper of the Cones, from the centre of overlapp at one end; to the centre of
overlapp at the other end; will be the same as the thickness of the material in
the Cone.
A solid welded or rolled Hoop can be put on the outside of large ends
prevent bursting, when pressing the small end of another Cone into it.
of Cones to
A. Fig. 2.

page_text: The small end of Cones can be rounded as shown, B, Fig. 2. To allow it to enter
the more easily into the large ends of Cones.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed I declare that what I claim is :-
1st. Making the Joints of Malleable Metallic Tubes, Pipes, Flues, Boilers (and the
like). By pressing the one section into or over the other; until a perfectly tight Joint
is formed, without Rivetting, Bolting, or Caulking.
2nd. In laying Tubes, Pipes, Flues (and the like) there is no Lead or other
composition required; Rivetting, Bolting, or Caulking; the Joints; as the lengths
of Tubes, Pipes, Flues (and the like) can be pressed into each other and made
perfectly tight.
3rd. In laying Tubes, Pipes, Flues (and the like) in excavations; you do not
require to excavate any recesses, as the Joints do not require Caulking..
THOS. HENDERSON.