Improvements in or relating to Apparatus to be employed in the Manufacture of Metallic Tapered Tubes.
Year: 1892

page_text: Date of Application, 25th Oct., 1892
Complete Specification Left, 25th July, 1893-Accepted, 30th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in or relating to Apparatus to be employed in the
Manufacture of Metallic Tapered Tubes.
We, WILLIAM PILKINGTON, CHARLES THOMAS BISHOP
ANDERSON
BROWNSWORD and ARTHUR PILKINGTON, trading as The Birmingham Climax
Steel Tube Company Catherine Street Aston, Birmingham, do hereby declare the
nature of our said invention to be as follows:-
We take an ordinary parallel tube preferably seamless of a size proper for our
purpose, and into it we insert a conoidal mandril.
We then pass the tube with the conoidal mandril inside it between two or more
rolls.
The bearings in which these rolls revolve are capable of being approached to or
receded from each other by means of a pressure which while being sufficient for the
purpose of causing the metal of the tube to be closed in upon the conoidal mandril
which is inserted in it, will yield sufficiently to allow of the larger part of the
conoidal mandril with the tube on it to pass through. This yielding pressure on
the bearings of the rolls we obtain by weights or weighted levers, or by fluid
pressure, such as that of steam water air, gas, or other fluids applied in well known
mechanical methods. Instead of passing the tube with the mandril inside it
between rolls, we sometimes pass it between the surfaces of revolving discs, the axes
of which are arranged in a manner proper for our purpose.
The bearings of the axes of these discs are capable of movement and of being
approached to or withdrawn from each other by means of springs or by weights
or weighted levers or by fluid pressure, in the same manner as described for the
rolls:
One or more of the rolls or discs as the case may be has or may have its bearings
fixed.
COMPLETE SPECIFICATION.
Improvements in or relating to Apparatus to be employed in the.
Manufacture of Metallic Tapered Tubes.
We, WILLIAM PILKINGTON, CHARLES THOMAS BISHOP, ANDERSON
BROWNSWORD and ARTHUR PILKINGTON trading as "The Birmingham Climax
Steel Tube Company" Catherine Street, Aston, Birmingham, do hereby declare
the nature of our said 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 apparatus to be employed in the
manufacture of metallic tapered tubes that is to say the converting of a parallel
tube into a tapered tube, (being an improvement or improvements upon a prior
Patent of ours for the same purpose bearing date September 24th 1892 No. 17090)
which is effected by the employment of rolls through which the parallel tube is
passed when placed upon a conoidal mandrel, under the yielding pressure or
resistance of springs weights or weighted levers or by fluid pressure such as steam,
water, air, gas, or other fluids.
-
And in order that this our said invention may be more fully understood, we shall
now proceed more particularly to describe the same and for that purpose we shall

page_text: Fig. 9, is a side view elevation shewing two rolls in housings set or mounted in
bearings through which the tube on the conoidal mandrel as Fig. 2 is passed being
the second or finishing process, shewing the application of a dead weight to bear or
bring said rolls together.
Fig. 10, is a side view elevation as Fig. 9 shewing the application of a weighted
lever to bear or bring said rolls together.
Fig. 11, is a side view elevation shewing the application of apparatus for fluid
pressure to bear or bring said rolls together.
a is a parallel tube, and is the conoidal mandrel upon which a is placed, c, c, care
the disc rolls which are set or mounted obliquely (as Fig. 3, clearly shows) in the
bearings d, d, d, in the housings or frames m, e, e, e, are the axis of c, c, c the dotted
lines Fig. indicating the other ends of e, f,f,fare the discs upon the rolls e, c, c.
The axis e of the upper roll c as shewn in Figs. 3, 4, 5, 6 revolves in a fixed
bearing while the axes e, of the two lower rolls c, revolve in bearings which may be
brought nearer to, or removed farther from the first named, this is effected by the
power of the helical springs g, which pressing upon or against the bearings d which
move in the slots tend to bring the rolls c, and discs together as shown at Fig. 4
and at Fig. 5 by the power of the jointed levers with weights and at Fig. 6
by hydraulic or fluid power by means of the cylinder % and ram r, the pressure pipe
shewn s.
Although we have shewn and described one roll with disc revolving in a fixed
bearing and two rolls with discs revolving in moveable bearings, we can employ
just as effectively the two rolls with discs revolving in fixed bearings, and the one
roll with disc revolving in a moveable bearing.
C
In Fig. 3, the movement of the rolls c is indicated by the arrows and the arrows
also shew the entering end and journey of the tube « upon the mandrel b, as Fig. 1.
In Fig. 4, we shew in front view the said tube upon the said mandrel passing
between and actuated by the surfaces of discs fff on rolls c, c, c, which being set
obliquely form the intervening space through which the tube and its mandrel is now
passing of a screw form, the mandrel and the tube being accommodated in its whole
length by the yielding pressure of the springs gg, or their equivalent, so that the
parallel tube as Fig. 1, is now converted to a tapered tube a¹ as Fig. 2.
To remove the uneven surface on the tube a¹ now converted caused by the oblique
setting of the discs ƒƒƒ on rolls c, c, e, in its passage through we pass the tube a
upon its conoidal mandrel & between two or more rolls c. c. (Sheet 2) constructed

page_text: and mounted in bearings d. d (in housings m in which they revolve the bearings of
one being fixed while the other revolves in bearings which may be brought nearer
to or receded from each other by a yielding pressure which being sufficient to close
the tube a' upon the mandrel, and thus remove the uneven surface will accom-
modate itself to the increased periphery of b.
In Fig. 9, we shew the yielding pressure required by a looped lever i, engaging
with the axis e of the upper moveable roll c with the dead weight j.
In Fig. 10, we shew the yielding pressure required by a lever i jointed to the
housing at
In Fig. 11, we shew the yielding pressure required by the apparatus, cylinder k,
ram l, pressure pipe t, for fluids.
The rolls and bearings in housings as Figs. 9, 10, 11, are the same substantially
in construction, and mounting, which we now employ for finishing (as above
described) as those we specify and claim in our prior Patent No. 17090-1892 for
converting a parallel tube into a tapered tube.
The above being our said invention we wish it to be observed that we do
not limit ourselves to the precise details or arrangement of parts as shewn on the
sheet of drawings but we may vary or modify the same without departing from the
principle of our said invention.
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
•
1st. In "Improvements in or relating to apparatus to be employed in the manu-
facture of metallic tapered tubes the combination of three rolls one of said rolls
revolving in fixed bearings the other two rolls revolving in bearings which may be
brought nearer to or removed farther from the bearings of the first named roll or
two of said rolls revolving in fixed bearings while the other roll revolves in bearings
which may be brought nearer to, or removed farther from the bearings of the first
named rolls, each roll provided with a disc, and each roll set up or mounted in
the said bearings obliquely to receive the pass of a parallel tube upon a conoidal
mandril through same, and its being converted into a tapered tube, substantially
as herein before described.
2nd. The combination of springs, weights, or weighted levers, or fluid pressure
to the said rolls, having a yielding pressure, for tending to bring together the said
rolls during the pass of the parallel tube upon a conoidal mandril through same
and its being converted into a tapered tube substantially as herein before described.
3rd. The combination of two rolls one of which revolves in fixed bearings, while
the other revolves in bearings which may be brought nearer to or removed farther
from the bearings of the first named roll for receiving the passes of a tapered tube
upon a conoidal mandril through same and its being smoothed or finished substan-
tially as herein before described.
4th. The combination of weights or weighted levers, or fluid pressure to the said
rolls having a yielding pressure for tending to bring together the said rolls during
the pass of the tapered tube upon the conoidal mandril through same and its being
smoothed or finished, substantially as herein before described.
5th. The general combination and arrangement of parts substantial as herein before
described and for the purposes set forth in the foregoing Specification and shewn on
the accompanying sheets of drawings.
Dated 9th L... 1909
THOS. KENDRICK,
Agent.