Improvements in the Manufacture of Pipes or Tubes.
Year: 1893

page_text: Date of Application, 12th Sept., 1893
Complete Specification Left, 11th June, 1894-Accepted, 14th July, 1894
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Pipes or Tubes.
We, ROBERT DANIEL SMILLIE, of 80 Mains Street, Glasgow, Electrical
Engineer, and WILLIAM CARLILE WALLACE, Engineer, Glenhuntley, Port-
Glasgow, do hereby declare the nature of this invention to be as follows:-
This invention relates to Improvements in the Manufacture of Pipes or Tubes,
and has for its object the construction of a pipe or tube capable of withstanding
steam or water pressure, but which will not corrode.
In carrying out our invention we provide a thin pipe or tube of some non-
corrosive metal, such as copper, and on this we wind spirally a strip or wire of
steel or other metal. On the tube thus formed we deposit externally by electricity
a metal or alloy which fills up all the interstices and consolides the spiral strip or
wire and the internal tube together, and at the same time protects the steel or
other metallic strip or wire from corrosion.
The consolidation of the strip or wire and the intermediate tube may be effected
by dipping into a bath of tin or other alloy.
Dated this 11th day of Santambor 1803
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicants' Agents.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Pipes or Tubes.
We, ROBERT DANIEL SMILLIE, of 80 Mains Street, Glasgow, Electrical
Engineer, and WILLIAM CARLILE WALLACE, Engineer, Glenhuntley, Port-
Glasgow, 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 :-
Our invention relates to Improvements in the Manufacture of Pipes or Tubes,
and has for its object the construction of a pipe or tube capable of withstanding
steam or other fluid or gaseous pressure.
In carrying out our invention we provide a pipe, tube, or shell of metal such as
copper, and on this we wind spirally a strip or strips, wire or wires of steel or
other metal. On the tube thus formed, or on the tube after passing through the
bath of molten metal hereinafter referred to we may deposit by electricity a metal
or alloy which consolidates and protects the tube and wire or
strip from corrosion.
The consolidation of the strip or strips, wire or wires and the internal shell may
be effected by dipping into a bath of molten tin or other metal or alloy of sufficiently
high fusing point to be unaffected by the temperatures of steam or other gas or
gases for which the tube is designed, a suitable flux being employed to ensure
adhesion between the molten metal or alloy and the wire and shell. This also
protects the spirally wound strips or wires from corrosion.
In the case of iron or steel wire being used it is preferable to have the same
cased with copper or other protective metal so that the steel or iron or other metal
core may not be deteriorated in the process of dipping in the molten bath. This
cased wire may be obtained at present on the Continent.,
In order that our invention may be properly understood and readily carried into
01

page_text: effect we have hereunto appended three explanatory sheets of drawings in the
several figures of which corresponding parts are marked with the same letters of
reference.
Figures 1, 2, and 3, Sheets 1 and 2, are longitudinal sections of different forms
of pipe made in accordance with and constituting our invention.
In Figure 1 the shell of the pipe A is wound with a flat strip or wire B. In
Figure 2 this strip or wire B consists of a core of steel C with a covering of
copper D; and in Figure 3 the wire B is not of square section, but round. This
latter form of wire may be adopted to pipes of small diameters. In Figure 4 we
have shown the apparatus for dipping the tube into the molten bath. It consists
of a bath E mounted on suitable masonry with furnace F, partition wall G, and
return flue H. The bath is of longitudinal form and semi-elliptical in cross section
to receive a whole length of pipe which is held by a mandril and supported by
movable brackets J. During the winding operation, motion is given to the pipe
through the mandril by spur gearing I mounted in a movable bracket J fixed to
the top of the masonry. This bracket J is pivoted at j, and the outer end of it
terminates in a tooth quadrant which engages with the worm K. The axis of
the driving pulley is at j, and a driving belt or band L gives motion to the spur
gearing I. The drum M used for feeding the wire to the pipe or tube is supported
on a bracket, and there is a drag N for giving tension to the wire or strip. When
the pipe has been wound and it is desired to lift it from the bath the worm K is
turned by means of the hand wheel k, and operates on the quadrant . In the
operation of lifting the pipe from the bath there will be a tendency of the wire to
become slack. To obviate this an arrangement of pulleys P and weight O is
provided, or instead of the weight a spiral spring may be substituted.
In some cases it may be advisable after dipping in the molten bath to deposit by
-electricity a metal or alloy to protect the consolidated tube from corrosion.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
The construction of pipes or tubes by winding a strip or strips, wire or wires of
steel or other metal on to a shell and consolidating the whole by depositing a metal
or alloy or by dipping into a bath of molten tin or other metal or alloy of sufficiently
high fusing point to be unaffected by the temperature of the steam or other gas or
gases for which the tube or pipe is designed, substantially as hereinbefore described
and shown on the drawings.
Dated this 9th day of June 1891
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicants' Agents.