Improvements in the Manufacture of certain kinds of Metallic Tubing, and in Tools to be employed in connection therewith.
Year: 1896

page_text: Date of Application, 14th Oct., 1896
Complete Specification Left, 11th June, 1897-Accepted, 14th Aug., 1897
Date of Application, 14th Oct., 1896
Complete Specification Left, 11th June, 1897-Accepted, 14th Aug., 1897
Improvements in the Manufacture of certain kinds of Metallic
Tubing, and in Tools to be employed in connection therewith.
I, CHARLES THOMAS BROCK SANGSTER, Works Manager to the Cycle Components
Manufacturing Company Limited, of Bournbrook, near the City of Birmingham, do
hereby declare the nature of this invention to be as follows:-
This invention relates to the manufacture of metallic tubing having internal web
stays crossing their diameter, and in tools to be employed in connection therewith,
and has for its object principally, the production of internally stayed or webbed solid-
drawn tubing, that is to say, the web is made from out of the walls of a solid-drawn
round or other sectioned tube by an inward displacement of the metal which divides
the tubes into two parts or compartments, with the inner end of the stay, which is
of a double thickness, abutting against the inside walls of the tube.
In carrying out the manufacture of a solid drawn and webbed D-section tube, I
take a round or elliptical solid-drawn tube, of a circumference about equal to both the
circumference of the D-tube to be produced and double the length of its web stay,
and pass the same through a specially constructed die having an inverted heart-
shaped opening or pass, but with the top formed semi-circular instead of being
pointed as in a heart figure. The V-sectioned rib at the middle of the bottom of the
pass (which is larger at the entrance than at the exit end) rises from the front to
the back until it approaches at the exit end the middle of the pass, and by this
gradually rising rib, the tube is creased or impressed with a longitudinal cleft, of a
depth nearly equal to the crossing diameter of the tube to be produced.
The cross section of this partially-formed tube now somewhat resembles that of a
solid cylinder with a sector cut out of it, and has an arched top with hanging
lobe-like sides.
The tagged end of this partially fashioned tube is then introduced into the semi-
circular clear eye of a gathering-in or closing die, which, on the tube
being passed therethrough, brings the sides of the cleft together to
form a double web extending from the middle of the base to the opposite part of the
circumference of the D-tube thereby fashioned.
To give a true figure to the tube, and prevent inward bulging of the walls, two
quarter-circle sectioned mandrils are placed longitudinally within the pass of the die,
with the opposed vertical sides coming within a distance of one another equal to the
thickness of the double-webbed stay."
In making circular or oval sectioned stayed tubes, I proceed in a similar way as
described, other than that the pass of the finishing die is of a circular or other
suitable cross section.
I wish it to be understood that I do not limit myself to the number of tools to be
employed, as the same may be varied without departing from the principle involved
in my invention, and the stay may also be of a cruciform cross section, with the
points of the arms abutting against the inside of the tube.

page_text: As a modification, I may make the said tubes from metal strips, first bent into the
form of a tube and then brazed and operated upon to form the web stays in the same
way as if the same had been solid-drawn.
CHARLES THOMAS BROCK SANGSTER,
By Henry Skerrett,
Agent for Applicant.
Improvements in the Manufacture of certain kinds of Metallic
Tubing, and in Tools to be employed in connection therewith.
I, CHARLES THOMAS BROCK SANGSTER, Works Manager to the Cycle Components
Manufacturing Company Limited, of Bournbrook near the City of Birmingham, 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 manufacture of inetallic tubes having internal web
stays crossing their diameters, and to tools to be employed in connection therewith,
and has for its object principally, the production of solid-drawn internally stayed or
webbed tubing, that is to say, the web is made from out of the walls of a solid-drawn
round or other sectioned tube by an inward displacement of the metal which divides
the tube into two parts or compartments, ith the inner end of the stay, (which is of
a double thickness) abutting against the inside walls of the tube.
Figure 1 of the accompanying drawing represents, upon an enlarged scale, an
elevation of the curved side of a solid-drawn or seamless web-stayed D-sectioned tube
made according to my invention.
Figure 2 is a vertical section of the same upon the dotted lines x,
Figure 1.
Figure 3 is an elevation of the flat side of the tube and Figure 4 an edge view
thereof.
Figure 5 is a transverse vertical section of a round sectioned seamless and
internally web-stayed tube made according to my invention, and Figure 6 is a
like view of an oval tube.
a is outer walls of the tube and b the integral and seamless internal web stay,
being of double thickness and with the inner end b', abutting against the inside
walls a' of the said tube.
In carrying out the manufacture of a solid drawn web-stayed and D-sectioned tube,
I take a round or elliptical solid-drawn tube, of a circumference about equal to both
the circumference of the D-tube to be produced and double the length of its web
stay, and pass the same through the specially constructed die shown in elevation in
Figure 6. This die, which is marked c, has an inverted heart-shaped opening or
pass c', but with the top c², formed semi-circular, instead of being pointed as in a
heart figure. The V-sectioned rib c³, at the middle of the bottom of the pass (which
is larger at the entrance end c, than at the exit end es,) rises from the front to the
back until it approaches at the said exit end.
Figure 7 is a section of the said die, showing the tube in the process of being
creased lying within the pass of the same, and Figure 8 is a vertical section of
Figure 7 upon the dotted line x'. These two views show how, by means of the
gradually rising rib c³, the said tube d, is creased or impressed with a longitudinal
left d', of a depth nearly equal to the crossing diameter of the tube to be
roduced.

page_text: The cross section of this partially-formed tube now somewhat resembles that of a
solid cylinder with a sector cut out of it, and has an arched top d², with hanging
lobe like sides d³.
The tagged end of this partially fashioned tube is then introduced into the semi-
circular clear eye e¹, of a gathering-in, closing or finishing die e, (shown in elevation
in Figure 9), which, on the tube being passed therethrough, brings the sides of
the longitudinal cleft d¹, together to form the double web b, extending from
the middle of the base to the opposite part of the circumference of the D-tube thereby
fashioned.
Figure 10 is a section of the die, with the tube lying within the pass of the
same.
Figure 11 is a like elevation as Figure 9, but with the tube shown in section
within the pass of the same.
Figure 12 is a vertical section, taken upon the dotted line x, of Figure 10, with
the tube in the act of being passed through the die.
To give a true figure to the tube, and prevent inward bulging of the walls, two
quarter-circle sectioned mandrils e², are placed longitudinally within the pass of the
die, with the opposed vertical sides e3 coming within a distance of one another equal
to the thickness of the double-webbed stay.
These mandrils are shown in position in the section Figure 13, (which is taken
upon the dotted line 3, Figure 10) also separately in side elevation in Figure 14 and
in end elevation in Figure 15.
In making circular or oval sectioned stayed tubes as shown in Figures 5 and 6, I
proceed in a similar way as described, other than that the pass of the finishing die is
of a circular or other suitable cross section.
I wish it to be understood that I do not limit myself to the number of tools to be
employed in the production of such tubing as herein described, as the same may be
varied without departing from the principle involved in my invention.
As a modification, I may make the said tubes from metal strips first bent into
the form of a tube and then brazed and operated upon to form the web stays in the
same way as if the same had been solid-drawn.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
First: Solid-drawn or seamless internally web-stayed metallic tubing, having the
diametrally-crossing web stays, which are of a double thickness, formed from out of
the walls of the said tubes and with the inner ends of the said stays abutting against
the inner circumference of the said tubes, substantially as described and set
forth.
SecondlyThe process of producing seamless or solid drawn internally web stayed
tubing by an inward displacement of the metal of a tube, which divides the same into
two compartments or parts, substantially as described and set forth.
Thirdly: The process of making solid-drawn or seamless internally web-stayed
tubing and the means or tools employed in connection therewith, substantially as
described and set forth.
FourthlyTne improvements in internally web-stayed tubing and in the manu-
facture or production of the same, substantially as described and set forth.
CHARLES THOMAS BROCK SANGSTER,
By Henry Skerrett,
24 Temple Row, Birmingham, Agent for Applicant.