Improvements in and in the Manufacture of Handle Bars of Cycles, and in Tools or Appliances to be used in connection with the said Manufacture.
Year: 1897

page_text: Date of Application, 20th Nov., 1897
Complete Specification Left, 15th July, 1898-Accepted, 22nd Oct., 1898
Improvements in and in the Manufacture of Handle Bars of Cycles,
and in Tools or Appliances to be used in connection with the
said Manufacture.
I, BARON ROSE, Managing Director of The Rose Tube Company Limited, of
Halesowen, in the County of Worcester, do hereby declare the nature of this
invention to be as follows;-
This invention relates to handle bars for cycles, and to the manufacture of
such parts, and to the appliances or tools to be used in connection with such
manufacture, and has for its object, to strengthen or reinforce the said handle bars
by internally thickening the walls of the metal of the same at those parts on
which the greatest strain comes, viz., at the middle or at that part which crosses
the stem.
In carrying out the manufacture of an internally strengthened handle bar,
I take a mandril composed of two or more sectional parts, transversely divided from
one another at about the middle of the mandril, or at one side of a reduced neck,
whilst the inner end of one section is reduced so as to fit socket-wise and flush
within the open end of the other section. When these sections come together,
the meeting parts at the middle are reduced in diameter to an extent equal to
the length of the internal thickening of the handle bar to be made. Both these
sections are threaded upon an axial rod, and the back end section may be shrunk
thereon so as to be fast, whilst the other end is detachable and is capable of being
slipped on the axial rod and being shut up to the other section and when in this
position is held thereby by a nut or equivalent taking upon an extending screwed
or other front end of the said rod.
The extremity of the mandril back end is annularly grooved whilst the back
tail end of the axial rod, or an equivalent extension of the mandril, and over which
the tagged end of the partially drawn tube is passed and there held during the
drawing of the same fully over the mandril.
A tube of the required length and a little larger in diameter than the mandril
is taken, and placed upon the said mandril, after which it is drawn through a die,
the eye of which is equal in internal diameter to the external diameter of the tube
to be made. The result is that the walls of the tube are both reduced in diameter
and elongated and a part of the metal is displaced or made to flow into the reduced
middle part of the united mandril sections, so that the inside of the tube lends
itself or falls to the configuration of the mandril thus, forming an internal
thickening or reduction of the bore at the middle part, whilst the outer walls are
parallel or taper as required.
The tag or holding end of the tube is then removed by cutting the same off
at the point of the annular groove in the back end mandril section so that the

page_text: tube can then leave the said mandril. The nut on the end of the rod is removed,
and the front section stripped from off the rod after which the tube can be readily
removed from the back end section.
Improvements in and in the Manufacture of Handle Bars of Cycles,
and in Tools or Appliances to be used in connection with the
said Manufacture,
I, BARON ROSE, Managing Director of The Rose Tube Company, Limited, of
Halesowen, in the County of Worcester, 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 handle bars for cycles, and to the manufacture of
such parts, and to the appliances or tools to be used in connection with such
manufacture, and has for its object, to strengthen or reinforce the said handle bars
by internally thickening the walls of the metal of the same at those parts on
which the greatest strain comes, viz., at the middle or at that part which crosses
the stem, and which said internally enlarged or thickened handle bar are produced
by the employment of a cross divided or sectional mandril, which is, at or adjacent
to the parts where the cross division comes, necked or reduced in diameter to an
extent for a distance corresponding with the thickness and length which the
internal enlargement in the bore of the bar or tubular length is to have, and
into which reduced part, a portion of the metal of the billet being drawn down upon
the mandril is displaced or made to flow, whilst after the drawing-down process
is completed tube and mandril are passed through a reeler to release the tube from
the mandril or make the same loose within the tube and after this operation the
two halves or sections of the mandril are separated and the respective sections
are removed from opposite ends of the tube.
Figure 1 of the accompanying drawings represents a longitudinal vertical
section of my improved handle bar length, having an internally thickened middle
part but with the outside walls perfectly parallel throughout.
Figure 2 represents partly in longitudinal section, and partly in elevation,
one form of sectional and part-reduced or necked mandril which I propose to
employ in the production of the said handle bar or like lengths.
Figure 3 represents an elevation of the mandril, with the tube, which is shown
in section, lying upon the same.
Figure 4 represents the tube with the tagged or rough ends removed and with
the one half or section of the mandril withdrawn to admit of the removal of the
finished length from the other mandril section.
The same letters of reference indicate corresponding parts in Figures 1 to 4.
In carrying out the manufacture of an internally strengthened handle bar,
according to this form of my invention, I take a mandril a, composed of two
sectional parts a' a², transversely divided from one another at about the middle a³,
with the cross division coming at one side of a reduced part or neck a', which is
of a length corresponding to that of the internal thickening 6', to be produced,
in the length b, whilst the difference between its diameter and that of the body
of the mandril is equal to the extent of such thickening. The inner end of the

page_text: one section a¹, is reduced at a5, so as to fit socket-wise into and lie flush within
the open and abutting end a, of the other section. Both these sections are
threaded upon an axial rod c, and the back end section a2, may be shrunk thereon
so as to be fast, whilst the other end is detachable and is capable of being slipped
on the axial rod and being shut up to the other section and when in this position
is held thereby by a nut c, or equivalent taking upon an extending screwed end c²,
of the said rod.
The extremity of the mandril back end is annularly grooved at a, whilst the
tail end 3, of the axial rod, or an equivalent extension of the mandril, is reduced
in diameter and over which the tagged end of the partially drawn tube
is passed and there held during the drawing of the same fully over the mandril.
In the process of manufacture, a tube of the required length and a little larger
in diameter than the mandril is taken, and placed upon the said mandril, after
which it is drawn through a die, the eye of which is equal in internal diameter
to the external diameter of the tube to be made. The result is that the walls of
the tube are both reduced in diameter and elongated, and a part of the metal is
displaced or made to flow into the reduced middle part of the united mandril
sections, so that the inside of the tube lends itself or falls to the configuration of
the mandril thus forming an internal thickening b¹, or reduction of the bore at
the middle part, whilst the outer walls 2, of the tubular or hollow bar length
produced are perfectly parallel, or they may if required be of a taper figure.
The tag or holding end 3, of the tube is then removed by cutting the same off
at the point of the annular groove a', in the back end mandril section. The nut
on the end of the rod is removed, and the front mandril section stripped from off the
rod and out of the interior of the tube, after which the said tube can be readily
removed from the back end section.
Figure 5 represents, partly in section and partly in elevation, a modified form
of mandril in the act of being removed from a finished tube.
Figure 6 represents the mandril, partly in elevation and partly in section,
separately.
Figure 7 represents this mandril in its position of use within the interior of a
tubular length and shown prior to the removal of the tagged end of the latter and
the separation of its sections preparatory to removing the same from the tube.
In this arrangement, the mandril a, is made up of two solid bar sections a¹, a²,
with the meeting portion of the sections correspondingly reduced in diameter
at a, a, thus forming the middle neck into which the metal of the tube is made
to flow as previously described, whilst connection between the sections is effected
by a screwed extension a6, of the one part, taking and screwing into an internally
wormed socket or hole a7, in the opposed end of the other section.
b is the tube, b the internal thickening and the tagged end.
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
First A parallel sided handle bar reinforced or strengthened by an internal
thickening of the walls of the same at a middle or other part, substantially as
described and set forth.
Secondly: In the manufacture of handle bars for cycles having an internally
thickened part as referred to in the preceding claim, the employment of a cross-
divided or sectional mandril which is necked or reduced in diameter at and
adjacent to the part where the cross division comes and with the sections suitably
connected together, substantially as described and set forth.
Thirdly The special form of mandril represented in Figures 1 to 4 consisting
of two cross divided tubular or sleeve sections threaded upon a bar or carrier and
suitably secured thereto and with a neck or reduced part coming upon the outer
circumference adjacent to the cross division, substantially as and for the purpose
described and set forth.

page_text: Fourthly; The modified form of mandril represented in Figures 5, 6 and 7
consisting of two screwed together or connected bar sections, with a portion of
the outer circumference adjacent to the cross division, necked or reduced in
diameter, substantially as and for the purpose described and set forth.
Dated this 14th day of July 185.
BARON ROSE.
By Henry Skerrett,
24, Temple Row, Birmingham, Agent for Applicant.