Improvements in Apparatus for Welding Tubes.
Year: 1892

page_text: Date of Application, 27th Sept., 1892
Complete Specification Left, 26th June, 1893-Accepted, 19th Aug., 1893
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Welding Tubes.
We, JOHN ELIOT Howard, and HENRY HOWARD, both of Coombs Wood
Tube Works, Halesowen, near Birmingham, Manufacturers, do hereby declare the
nature of this invention to be as follows:-
According to this invention butt welded tubes are manufactured by being
successively drawn through two dies without being removed from the draw
bench.
The first die is as usual fixed at the mouth of the furnace whilst the second die
is during the first drawing operation loose upon the drawing bar and moves with it
but when the first drawing operation is completed the second die is automatically
arrested and the tube is drawn through it by the continued motion of the drawing
or it may be that the second die is arrested and the tube drawn through it before
the first drawing operation is completed provided that the distance between the
dies is such as to give the tube a sufficient time to cool to such an extent as to
allow it to support the strain of the double drawing operation whilst remaining
sufficiently plastic to be formed into the final shape by its passage through the
second die.
The draw bench is of ordinary construction except that it is of about twice the
usual length. It is provided with an endless chain and a carriage carrying tongs
for seizing the drawing bar whose end is welded or otherwise fixed to the strip from
which the tube is to be formed.
At one side of the draw bench is a fork or other instrument for arresting and
holding the second die. If the apparatus on the carriage by which the bar is held
is sufficiently small to pass through the fork the latter may be fixed but it is
generally more convenient to have it movable so that it may usually be out of the
way of the carriage and only be placed in the path of the second die at the proper
moment. Thus it may be turned back on a hinge and kept raised by a support
which is removed by the carriage in its backward motion.
Dated this 26th day of September 1892.
JOHN E. HOWARD.
HENRY HOWARD.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Welding Tubes.
We, JOHN ELIOT HOWARD and HENRY HOWARD, both of Coombes Wood
Tube Works Halesowen near Birmingham, Manufacturers 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 :-
According to this invention butt welded tubes are manufactured by being
successively drawn through two dies without being removed from the draw
bench.
The first die is as usual fixed at the mouth of the furnace whilst the second die
is during the first drawing operation loose upon the drawing bar and moves with
it but when the first drawing operation is completed the second die is automatically
arrested and the tube is drawn through it by the continued motion of the drawing
or it may be that the second die is arrested and the tube drawn through it before
the first drawing operation is completed provided that the distance between the
dies is such as to give the tube a sufficient time to cool to such an extent as to

page_text: allow it to support the strain of the double drawing operation whilst remaining
sufficiently plastic to be formed into the final shape by its passage through the
second die.
The draw bench is of ordinary construction except that it is of about twice the
usual length. It is provided with an endless chain and a carriage carrying tongs 5
for seizing the drawing bar whose end is welded or otherwise fixed to the strip from
which the tube is to be formed.
At one side of the draw bench is a fork or other instrument for arresting and
holding the second die. If the apparatus on the carriage by which the bar is held
is sufficiently small to pass through the fork the latter may be fixed but it is
generally more convenient to have it moveable so that it may usually be out of
the way of the carriage and only be placed in the path of the second die at the
proper moment. Thus it may be turned back on a hinge and kept raised by a
support which is removed by the carriage in its backward motion.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a sectional elevation, Figure 2 a sectional plan and Figure 3 an end
elevation (with some of the parts omitted) of an apparatus constructed according
to this invention.
a is the draw bench, 6 the endless chain, c the carriage, d the tongs, e the
drawing bar, f the strip from which the tube is to be formed and g is the first die. 2
All these parts are old and well known and require no further description. h is
the second die which is loose upon and moves with the bar e until it is arrested by
the fork j. The latter is pivotted at k and during the first part of the backward
motion of the carriage c is turned up and held in the position shown in full lines in
Figure 3 by the support 1. When however the carriage reaches the position in 2
which it is shown in Figures 1 and 2, the hook m upon it comes into contact with the
support and turning the latter about its pivot frees the fork ; which drops
into the position shown in dotted lines in Figure 3 ready to arrest the second
.die h.
Having now particularly described and ascertained the nature of our said inven- 8
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. The employment of a second die and means for arresting the same.
2. Apparatus for welding tubes substantially as described and shown in the
drawings.
3