Improvements in Machinery to be Employed in the Manufacture of Metallic Tubes.
Year: 1895

page_text: Date of Application, 16th May, 1895
Complete Specification Left, 15th Feb., 1896-Accepted, 16th May, 1896
PROVISIONAL SPECIFICATION.
Improvements in Machinery to be Employed in the Manufacture of
Metallic 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 :-
Our invention relates to machinery to be employed in the manufacture of metallic
tubes.
The object of this our present invention is the preformance of one or more
of the following processes in the manufacture of cold drawn tubes, namely:
reducing, drawing, and releasing from the mandril; and by our present invention
two tubes may be treated simultaneously.
In order to carry our invention into effect we provide in the first place two axes
each carried in suitable bearings. These axes are not parallel to one another but
are set so that they apparently cross each other.
At the middle or nearly so of each axis there is a projection of a shape
approximately. spheroidal which we call the "bulb." This "bulb" may be made
all of one piece with the axis, or it may be securely fastened thereto, in either case
the bulb" and axis revolve together.
6:
The centre of each "bulb" is at the apparent intersection of the centres of the
axes when viewed from a point situated in a line which is at right angles to the
plane of each of the axes, the axes lying in parallel planes.
We also provide two other axes parallel to each other and situated in a plane at
right angles to the parallel planes wherein the first named non-parallel axes lie at
or near the middle of each of the second or parallel axes is a roller or disc, the edge
or periphery of which may be either straight or curved in cross-section. One of
the parallel axes is placed on each side of the pair of "bulbs" on the non parallel
axes, and so near thereto that a space is left between the three surfaces, namely the
surfaces of the two "bulbs" and the edge of the disc or roll, and through that
space the tube to be manipulated is passed.
The bearings of all the axes run in suitably formed journals, fixed or movable, in
the framing of the machine, and the proper rotary motion is given to each axis by
means of appropriate gearing.
As there is a revolving disc or roller at each side of the pair of revolving
"bulbs" there will evidently be two spaces through which the tubes being dealt
with may be passed simultaneously.
The axes, the "bulbs" and the rollers or discs are all made of metal of the kind
that these parts are usually made, and the other parts of the machine are also of
metal proper for their respective purposes.
We employ springs to support the middle rollers.
Dated 19th M. 1905
THOS. KENDRICK,
3 Cherry Street, Birmingham, Agent

page_text: COMPLETE SPECIFICATION.
Improvements in Machinery to be Employed in the Manufacture of
Metallic 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 machinery to be employed in the manufacture of cold
drawn metallic tubes. Our object being to perform one or more of the following
processes, namely reducing, drawing, and releasing from the mandril.
By this our present invention, we may operate upon two or more tubes
simultaneously.
To carry out our invention we provide two axes, carried in suitable bearings
these axes are not parallel to one another but set so that they apparently cross each
other each of those axes are provided with a "bulb" at the centre and revolve
together.
In connection with the above we employ two other axes parallel or nearly
parallel to each other, carried in suitable bearings the centre of each having
"roll"
""bulb "
or "disc" one of these parallel axes is placed on each side of
the " bulbs"
on the non parallel axes and so near thereto that a space is left
between the surfaces of the two "bulbs" and the surface of the roll or disc.
a
As there is a revolving "roll" "bulb " or "disc" at each side of the pair of
revolving "bulbs," two spaces are thus formed through which the tubes being
treated are drawn or extended, being effected by the setting up of the axes and the
"bulbs" and the "rolls or discs thereon.
"
The bearings of all the axes run in suitable journals, carried within the frames or
housings, the rotary motion being given to each of two of these axes by appropriate
gearing.
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
refer to the several figures on the sheet of drawings hereunto annexed, the same
letters of reference indicating corresponding parts throughout all the figures.
Figure 1 is a plan view of the machine or apparatus employed in the process of
reducing drawing and releasing tubes from the mandril, and constructed according
to our invention.
Figure 2. is a front view of same.
Figure 3 is a longitudinal view in section of the "tube guide."
Figure 4 is an end view of same.
Figure 5 is a sectional view of the gearing employed taken on the line A A.
"
or
a, a¹ are the two axes, carried by the bearings b, b¹. c, c' are the "bulbs."
d, dare axes carried by the bearings e, e'. f," are the "rolls"
" bulbs
"discs." 9, 9, are the spaces. h, h, are the tubes on the mandrils I, h. i, i are
the springs. j, j are the frames or housings.
The mode of operation is as follows:-
When the tubes to be operated upon are placed in the machine at the entering end
indicated by the arrow in Figure 1 and reaching the space or spaces 9, 9' each tube is
caught by the peculiar position of the bulbs c, c¹ to each other and the "rolls"
" bulbs" or discs f, f working therewith, and thus drawn through by a revolution
of the same to the guides as (Figures 1, 3 and 4) and in a manner which causes a
gradual reducing or drawing during the operation. We cause the tubes to be
carried upon mandrils which we prefer to allow to travel through the machine.

page_text: When operating upon tubes for the releasing from the mandrils upon which they
have been drawn by the ordinary draw bench we employ the same essential
features hereinbefore described as being necessary when operating in reducing or
drawing.
The springs i. i. we chiefly employ to reduce the shock to the machine
or gearing.
While we have described the features of our invention and the object we have
attained and shewn upon the sheet of drawings, we would observe in conclusion
that we do not limit ourselves to those drawings only as illustrative of our invention.
We may vary the position or setting up of the axes with each other as practice
may determine without departing essentially 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 :-
1. In the manufacture of metallic tubes, reducing, drawing, and releasing from
the mandril two or more tubes simultaneously, substantially as described.
2. In reducing, drawing, and releasing from the mandril two or more tubes
simultaneously as aforesaid, the application and use of two axes, set so that they
apparently cross each other, provided with the "bulbs" mounted or formed upon
the said axes, in combination with two axes set parallel or nearly parallel to each
other and also provided with "rolls" or "bulbs" and working collectively with the
non-parallel axes; the whole being carried within the frames, housings and bearings
substantially as herein before described and illustrated by the drawings.
"
3. The general construction, combination and arrangement of parts substantially
as herein before described in the foregoing Specification and illustrated on the
accompanying sheet of drawings.
Dated 15th February 1896.
THOS. KENDRICK,
3 Cherry Street, Birmingham, Agent.