Improvements in the Means or Mode Employed in the Manufacture of Seamless Metallic Tubes.
Year: 1896

page_text: Date of Application, 13th Aug., 1898
Complete Specification Left, 12th May, 1897-Accepted, 12th June, 1897
ROVISIONAL SP
ATION.
Improvements in the Means or Mode Employed in the Manufacture
of Seamless Metallic Tubes.
We, WILLIAM PILKINGTON of Wylde Green, Erdington Manufacturer and, ARTHUR
PILKINGTON of Erdington, Manufacturer do hereby declare the nature of our said
invention to be as follows:-
Our invention for improvements in the manufacture of seamless metallic tubes,
has for its object the lengthening and also the reduction in outside diameter of the
short thick tube, which is produced in any suitable manner.
In carrying our invention into effect we provide a number of parallel shafts usually
three, and impart rotary motion to them in the same direction by appropriate
gearing.
We secure upon each of these shafts a series of rolls having their edges convex.
These rolls diminish in size from one end of each shaft which we call the leaving
end, the rolls at that end being the largest. The series of rolls on each shaft
diminishes in size in a similar manner, so that the three largest rolls, that is one on
each shaft are in one plane at the leaving end, then the three next largest in a plane
parallel to the first and so on. The effect of placing the rolls on the shafts in this
manner is that between the smallest rolls there is a central aperture which is large
enough to receive, or very nearly to receive the short thick tubs when presented to it
endwise, the tube being forced along by means to be presently described, is seized
by the next set of rolls, and a reduction of external diameter with an increase of
length is the consequence. From these rolls it passes to the third set of rolls and
so on until it emerges from between the largest set of rolls at the leaving end of
the machine.
We will now describe the manner in which the tube is passed through, the rolls.
The shafts are prolonged beyond the entering rolls, and in the central aperture
between the shafts we provide a trough in which we place the short tube which is to
be rolled. The trough is so placed that the axis of the tube lies in the centre of the
aperture between the rolls, looking at them endwise. We then pass a bar through
the aperture between the rolls from the leaving end and through the short thick
tube to be operated upon, axially and into a hollow plunger. This bar serves as a
support for the tube during the rolling. The plunger is then forced (by a screw or
by hydraulic pressure or other convenient means) against the end of the short thick
tube to be rolled and it thus compels the tube to pass between the various sets of rolls,
beginning at the smallest until it passes out of the apparatus at the leaving end
having been reduced in diameter and increased in length by the process, and also
having had its substance compressed and consolidated by the action of the rolls.
Date 19th Am 1906
New Eldon Chambers, 50 Cherry Street, Birmingham, Agent:

page_text: Improvements in the Means or Mode Employed in the Manufacture
of Seamless Metallic Tubes.
We, WILLIAM PILKINGTON of Wylde Green Erdington Manufacturer and ARTHUB
PILKINGTON of Erdington Manufacturer, 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 for improvements in the manufacture of seamless metallic tubes
has for its object the lengthening and also the reduction in outside diameter of the
short thick metallic tube employed and which is first produced in any suitable
manner.
In carrying our invention into effect we provide a number of parallel shafts
usually three, and secure upon each of these shafts a series of rolls having their edges
convex, these rolls diminish in size from one end, that is the leaving end to the
entering end. We impart a rotary motion to them in the same direction by
appropriate gearing. The effect of placing the rolls on the shafts in this manner is
that between the smallest rolls there is a central aperture which is large enough to
admit the short thick metal tube which is forced along by means of a plunger and
seized by each alternate set of rolls which effects the reduction of external diameter
and increases its length.
And in order that this our said invention may be more readily understood, we
will now proceed to describe the same with the aid of the accompanying sheet of
drawings, similar letters of reference denote similar parts in each figure in which
they occur.
Figure 1 is a side elevation of a machine constructed according, to our invention
having three parallel shafts to each of which are secured a series of metallic rolls
their edges being of a convex form and diminishing in their size from the leaving
end, to the entering end of the machine and shown ready to seize the short thick
metallic tube, these shafts with their rolls are mounted in a suitable framing or
housing.
Figure 2 is a cross section of the same taken on the line A. B. (Figure 1) looking
from the entering end.
Figure 3 is a cross section taken on the line C. D. (Figure 1) looking from the
entering end.
abo are shafts, with rolls def mounted in the framing or housing g and parallel
to each other, these shafts a b c are so placed that their ends carry the smallest rolls
at the entering end h, and the largest rolls at the leaving end i. j is the short
thick metallic tube presented end wise to the aperture a entering end h, and lies in
the trough k. 1 is a metal bar which passes through the entering space of the
rolls def and through the short tube j and into the hollow plunger m, which bar
serves as a support for the tube ; during the operation of rolling. n is the screw
employed for forcing the plunger m against the tubej to be rolled and by this power
is compelled to pass between the various sets of rolls def beginning at the smallest
rolls at the entering end h, and leaving at the largest rolls at i. j having been
reduced in its diameter and increased in its length, and compressed and consolidated
by the action of the rolls def.
The shafts a b c, are mounted in adjustable bearings in the framing g of the machine
these bearing may be made capable of yielding by the employment of springs or
their equivalent. We do not limit ourselves to the manner of shafts nor to the number
or shape of rolls thereon, we may alter or modify the same without departing from
the principle of our said invention.

page_text: 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 :-
In improvements in the means or mode employed in the manufacture of seamless
metallic tubes.
1st. The construction and arrangement of the shafts a b c, provided with rolls def
increasing in their diameter from the entering end h, to the leaving end i of the
machine, the bar for supporting ; in k, the plunger m, actuated by n, substantially
as herein before described and illustrated by the drawings.
2nd. 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.
Jated 11th May 189
THOS. KENDRICK,
New Eldon Chambers, 50 Cherry Street, Birmingham, Agent.
THOS.
KENDRICK,
New Eldon Chambers, 50 Cherry Street, Birmingham, Agent.