Year: 1897

page_text: I, JAMES LESLIE WRIGHT, of the Firm of William Bayliss Limited, of Sheepcote
Street, in the City of Birmingham; Manufacturers; do hereby declare the nature of
this invention to be as follows:-
This invention relates to the manner in which I secure brass or other metal cases
upon iron or steel tubes such as are employed for bedsteads, fenders, and for other
purposes, my object being, to effectually connect the tube and the case together
without brazing but in such a manner that there shall be no joint visible when the
tube is completed. My invention is also applicable to the connection and closing. of
the edges of tubes of various metals either with or without brass or other cases.
In the application of my invention to the construction of a cased. tube I form
grooves or depressions from the outer surface of the open jointed iron or steel tube
adjacent to the longitudinal edges. The act of so grooving or depressing the exterior
surface of the tube will produce corresponding projections from the interior surface.
After the brass or other metal case has been placed over the tube in the ordinary
manner I place between the abutting or adjacent longitudinal edges of both the tube
and the case a clamping wire of a double headed or flanged section which extends the
whole length of the tube, its central portion or web fitting between the edges of the
tube and case whilst the flanges project on the exterior and interior of the cased tube
respectively. I then subject the clamping wire to a compressive force in any con-
venient manner but preferably by drawing it on a mandrel through a die, with, the
result that the outer head or flange or a portion of the same together with the
portion or portions of the case beneath it is forced into the grooves on the exterior
surface of the tube, whilst the under side of the inner head or flange is caused to close
or embrace the projections on the interior of the tube, and in this manner I securely
connect together the adjacent edges of both the tube and the case.
The effect of the compression applied to the clamping wire is also to press the
heads or flanges to the level or nearly to the level of the surface of the tube, and on
finishing the exterior of the case in the usual manner, the outer head or flange is
completely hidden and thus no joint is visible.
Instead of grooving or depressing the outer surface of the tube adjacent to its edges
as hereinbefore described I sometimes dispense with such grooves or depressions and
simply turn in the edges of the tube, and connect or lock the same together by a
clamping piece formed preferably by doubling a narrow sheet strip to the required
shape, such clamping piece or strip being subjected to a compressive or consolidating
force such as described.

page_text: I, JAMES LESLIE WRIGHT, of the Firm of William Bayliss Limited, of Sheepcote
Street, in the City of Birmingham, Manufacturers, 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 :-
This invention relates to the manner in which I secure brass or other metal cases
upon iron or steel tubes such as are employed for bedsteads, fenders, and for other
purposes, my object being to effectually connect the tube and case together without
brazing but in such a manner that there shall be no joint visible when the tube is
completed. My invention is also applicable to the connection and closing of edges of
tubes of various metals either with or without brass or other cases.
In the three accompanying sheets of explanatory drawings to be hereinafter
referred to.-
Figures 1 to 4 inclusive on Sheet 1, are sectional views of tubes as made or in
process of making in accordance with my invention.
On Sheet 2 Figure 5 is an elevation and Figure 6 a plan of a part of the apparatus
employed in the construction of one form of the tubes, whilst Figures 7, 8, and 9 are
end views of the same.
The same reference letters in the different views indicate the same parts.
Referring to the cased tube illustrated at Figure 1, I form, in the manufacture of
such tube, grooves or depressions from the outer surface of the open jointed iron or
steel tube, or the "iron inside" A, adjacent to the longitudinal edges. The act of so
grooving or depressing the exterior surface of the tube will produce corresponding
projections from the interior surface.
After the brass or other metal case B has been placed over the tube A in the
ordinary manner, I place between the abutting or adjacent longitudinal edges of both
the tube and the case, a clamping wire as C of a double headed or flanged section
which extends the whole length of the tube, its central portion or web fitting between
the edge of the tube A and case B whilst the flanges project on the exterior and
interior of the cased tube respectively. I then subject the clamping wire C to a
compressive force in any convenient manner, but preferably by drawing it on a
mandrel through a die with the result that the outer head or flange, or a portion of
the same, together with the portion or portions of the case beneath it is forced into
the grooves on the exterior surface of the tube, whilst the underside of the inner
head or flange is caused to close or embrace the projections on the interior of the
tube, and in this manner I securely connect together the adjacent edges of both the
tubes and the case.
The effect of the compression applied to the clamping wire is also to press the
heads or flanges to the level or nearly to the level of the surface of the tube, and on
finishing the exterior of the case in the usual manner the outer head or flange is
_completely hidden and thus no joint is visible.
Instead of grooving or depressing the outer surface of the tube or iron inside A,
adjacent to its edges as herein before described, I sometimes dispense with such
grooves or depressions and simply turn in the edges of the tube as illustrated at
Figure 2, and connect or lock the same together by a clamping piece C¹ formed
preferably by doubling a narrow sheet strip to the required shape, such clamping
piece or strip being subjected to a compressive or consolidating force such as
described.
Figure 3 illustrates the application of my invention to an iron or other tube having
no outer case, the turned in edges of the tube being secured and the joint hidden by

page_text: the clamping wire or strip C², whilst Figure 4 represents a cased tube in which the
locking wire or strip hereinbefore described is dispensed with, the edges of the case
being interlocked and the joint depressed and hidden in a groove formed in the iron
inside opposite to the close joint of such part.
In one manner of producing cased tubes such as illustrated at Figure 4, the close
jointed iron inside with its groove for the reception of the case joint is first made in
any ordinary manner, and the metal case is then folded and locked upon the same by
drawing the tube and case together through the formers and dies illustrated by
Figures 5 to 9 inclusive. Figure 7 on Sheet 3 is an end view showing the first former
of the apparatus, Figure 8 an end view with first former E removed, showing central
die, and Figure 9 a sectional end view showing the back die and the closer.
The iron inside is passed through the apparatus with the groove uppermost and is
kept in such a position by the screw stud D in the first former E. By such former,
which is secured to the body of the tool holder by the plugs ee the flat strip from
which the case is to be produced is turned up into the shape illustrated by the
sectional views above Figure 7. In passing from the former E to the central die G
the case is forced into a more circular form by the plate folder F and on entering the
die G it has a shape as shown by the section above Figure 8. On emerging from
the die G, the case joint is pressed by the closer H until on entering the back die J
the case with its iron inside has the form shown by the section above Figure 9. After
leaving the die J the cased tube is drawn through a plain finishing die by which final
drawing the joint is effectually hidden.
Instead of bending the metal strip and closing and finishing the same completely
in the one apparatus such as hereinbefore described, I sometimes accomplish the
preliminary bending up of the metal in a forming tool such as is now employed in
the making of ordinary close joint cased tube, but so modified that instead of both
edges of the metal being turned in, one edge only is turned in whilst the other edge
is turned over in an outward direction so that the two oppositely turned edges can
engage or lock with each other.
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 '
The improved means for connecting and closing the edges of tubes of various
metals and of the outer cases of cased tubes without brazing and in such a manner as
to effectually conceal the joints, substantially as described and as illustrated.
Dated this 20th day of December 1807
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicant.