Improvements relating to the Manufacture of Tubes.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements relating to the Manufacture of Tubes.
I, EDWIN THOMAS WAINWRIGHT, of 5, Sutton Street, Aston, in the County of
Warwick, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
My invention has for its object the production of strong and reliable tubes for
the conveyance of gas or water, and for other purposes, in an economical and
expeditious manner direct from puddled or like bars.
In the application of my invention I wind a puddled iron bar, immediately
on its leaving the rolls, in a spiral direction upon a suitable bar or mandrel, the
coils of the helix being preferably made to overlap each other at the edges in
order that a very effectual weld may be obtained when the helical tube is sub-
jected to a compressive action by rolls or other ordinary means.
The tube so formed direct from a puddled bar is reduced in diameter and in
the thickness of the metal to bring it to the necessary dimensions to suit the
particular purposes for which it may be required, and by the rolling or other
working necessary to effect such reduction the metal is rendered homogeneous
thereby ensuring a greater uniformity in the strength of the tube. I sometimes
employ two or more puddled bars in the manufacture of my tubes and wind them
in opposite directions one upon the other so obtaining a pile having not less
than a double thickness of metal throughout. Or the bars may be wound in the
same direction but with the helical joints so arranged that they shall not fall
together.
The tubes produced in accordance with my invention have the grain or fibre
of the metal disposed in a circumferential direction and are thus-better adapted
to resist a bursting stress than the tubes made in the ordinary manner from
wrought iron tube strips.
I, EDWIN THOMAS WAINWRIGHT, of 5, Sutton Street, Aston, in the County of
Warwick, Manufacturer, do hereby declare the nature of this invention and in
011

page_text: what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
My invention has for its object the production of strong and reliable tubes for
the conveyance of gas or water and for other like purposes, in an economical and
expeditious manner direct from puddled or like bars.
In the application of my invention I wind a heated puddled iron bar in a
spiral direction upon a suitable bar or mandrel, the coils of the helix being prefer-
ably made to overlap each other at the edges in order that a very effectual weld
may be obtained when the helical tube is subjected to a compressive action by
rolls or other ordinary means.
The tube so formed direct from a puddled bar is reduced in diameter and in
the thickness of the metal to bring it to the necessary dimensions to suit the
particular purposes for which it may be required, and by the rolling or other
working necessary to effect such reduction the metal is rendered homogeneous
thereby ensuring a greater uniformity in the strength of the tube. I sometimes
employ two or more puddled bars in the manufacture of my tubes and wind them
in opposite directions one upon the other so obtaining a pile having not less
than a double thickness of metal throughout. Or the bars may be wound in the
same direction but with the helical joints so arranged that they shall not fall
together.
The tubes produced in accordance with my invention have the grain or fibre
of the metal disposed in a circumferential direction and are thus better adapted
to resist a bursting stress than the tubes made in the ordinary manner from
wrought iron tube strips.
The accompanying sheet of explanatory drawings illustrate the application
of my invention.
Figure 1 represents a portion of a tube as made from a helix having coils
which overlap each other in a socket like form as illustrated in the sectional part
of the figure.
The tube represented at Figure 2 is made up from a single coil, whilst that
shown at Figure 3 is made from two coils or helices arranged one within the
other and subsequently welded together.
Figure 4 shows a compound tube formed by an outer coil or helix A which
is welded upon an ordinary (not coiled) tube B nested within it.
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:
1. The manufacture of tubes, for the conveyance of gas or water and for
other like purposes, from coiled puddled iron bars, substantially as described.
2. The improved tubes for the conveyance of gas or water and for other like
purposes, having the whole or a portion of the metal from which they are formed
disposed in a circumferential direction, substantially as described and as illustrated.
Dated this 92nd day of Mar 1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, & 25, Cross Street, Manchester,
Agents for the Applicant.