Year: 1887

page_text: Date of Application, 6th June, 1887
Complete Left, 6th Mar., 1888
Complete Accepted, 20th Apr., 1888
We ALFRED SOHIER BOLTON and THOMAS BOLTON of Oakamoor Mills near Cheadle
in the County of Stafford, ('opper and Brass Manufacturers, do hereby declare the
nature of this invention to be as follows:-
:-
This invention relates to an improvement on the invention for which we obtained
Letters Patent bearing date July 9th 1886 No. 8977.
In the specification of that patent, we described a mode of drawing wire in which
the varying rates of draught, to suit the elongation of the wire, were attained
automatically, reliance being had on the slip of the wire on the driven blocks.
We now propose, in carrying out this principle of action, to re-arrange the draw
benches, and to group two, three, or more side by side.
The dies in each draw bench, instead of being arranged, as is usual, one behind the
other in a line, and having interposed between them driven blocks or pulleys, we now
arrange transversely of the bench, preferably in two parallel lines, the dies of the one
row being set opposite the spaces of the other row.
Instead of a series of blocks, we provide a driven shaft which may extend across
from one or a pair of draw benches to any number of draw benches.-This shaft we
fit with cylinders, one for each draw bench, which cylinders serve, like the blocks, to
draw the wire through all the dies but the last of the series in each drawbench (or we
may make the body of the shaft itself sufficiently large to serve as the drawing
cylinder).-A lubricating trough is provided in each bench for the cylinder to
rotate in.
Fitted to the driven shaft are pulleys for transmitting motion to the spindles which
carry the finishing or take-up block.
The dies are carried by transverse bars supported by standards on the drawbench.
The wire taken from the ordinary reel is passed under or lapped once round the.
cylinder, which is partially immersed in a suitable lubricant.
The wire then passes forward to a transverse guide bar, around which it is lapped
to bring it opposite the first of a series of dies carried by the first guide bar.
Here the first drawing is effected, and the wire then passes through an opening in
the second guide bar to the cylinder.

page_text: After lapping one or more times around this cylinder; it is led forward again to the
guide bar, whence it passes through an opening in the first die bar to the second die
of the series carried by the second guide bar, and so to the driven cylinder as before,
to be again, in like manner, led over the guide bar, and passed to the third or next
succeeding die.
In this way, each die of the series is brought to act upon the wire in turn, the
cylinder giving the wire the requisite draught; until it reaches the last die of
the series.
This die has an independent support situate at the back of the cylinder, to bring it
opposite the finishing or take-up block, which, like the reel, is mounted at the back of
the drawbench.
To throw the drawbench out of action, we provide (when driving the take-up block
by friction of contact) for lifting the block out of close contact with its spindle, which
will then rotate without acting upon the block.
As the cylinder has a uniform surface speed throughout its length, it will be
understood that we rely on the slip of the wire upon its periphery for the varying
rates of draw required by the wire as it becomes elongated in the process of
drawing.
.
If thought desirable, we may use a cone in place of a cylinder, to effect the draught
of the wire through the dies, the diameter increasing in proportion to the elongation
of the wire.

page_text: We ALFRED SOHIER BOLTON and THOMAS BOLTON of Oakamoor Mills near Cheadle
in the County of Stafford, Copper and Brass 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 :--
This invention relates to an improvement on the invention for which we obtained
Letters Patent bearing date July 9th 1886 No. 8977.
In the specification of that patent, we described a mode of drawing wire in which
the varying rates of draught to suit the elongation of the wire were attained
automatically, reliance being had on the slip of the wire on the driven blocks.
We now propose, in carrying out this principle of action, to re-arrange the draw
henches, and to group, where practicable, two three or more side by side.
Instead of arranging the dies in each draw bench one behind the other in a line,
and interposing between them driven blocks or pulleys as described in our above
mentioned patent, we now arrange the dies in a group, the number of dies in the
group depending on the nature of the material to be drawn.
A
Instead of a series of blocks, we provide a driven shaft or cylinder, which serves,
like the blocks, to draw the wire through all the dies but the last of the series.
lubricating trough is provided, where practicable, for the cylinder to rotate in, and
the driven shaft transmits motion to the spindle which carries the finishing or take-up
block.
In the accompanying drawings:-
Fig. 1 is a plan view of what may be termed a group of draw benches arranged to
work according to our invention.
Fig. 2 is a front elevation of the same, and Fig. 3 is a sectional elevation taken in
the line 1, 2, of Figs. 1 and 2, shewing the course of the wire through the drawing
apparatus.
The figures indicate four draw benches in the group, but the number may be more
or less as found convenient.
A is a bench having two levels running from end to end of the group, and resting
upon suitable under framing.
Fitted to the lower level of this bench is a series of lubricating troughs B, in
which are mounted the cylinders C, the same being fitted to, or forming part of
a longitudinal shaft C extending from end to end of the group of benches.
This shaft turns in plummer blocks carried by the bench, and it is fitted with
pullies C for driving the spindles of the several finishing or take-up drums D D.
EE are two bars extending from end to end of the apparatus, and supported by
standards E-Their use is to carry groups of dies e varying in number according to
the size of the wire to be drawn and the inaterial to be operated upon. The drawing
shews ten dies, that being a suitable number for drawing copper or brass wire.

page_text: These dies are, it will be seen, arranged in two parallel lines, the dies of the one
row being set opposite the spaces of the other row.
FF are reels supported on studs fixed to the bench, and serving to carry the wire
to be drawn, and G is a guide bar standing in front or forward of the die bars, and
extending from end to end of the apparatus. The use of this guide bar will be
presently explained.
The cylinders C serve to draw the wire through all the dies but the last of the series
in each draw bench.
The wire taken from the reel F is passed under or lapped around the cylinder C,
which is partially immersed in a suitable lubricant in the trough B.
The wire then passes forward to the guide bar G, around which it is lapped to bring
it opposite the first of a series of dies carried by the die bar E.
Here the first drawing is effected, and the wire then passes through an opening in
the die bar E¹, back to the cylinder C.
After lapping one or more times around the cylinder, it is led forward again to the
guide bar G, whence it passes through an opening in the die bar E to the second die
of the series, carried by the die bar E¹, and so to the driven cylinder as before, to
be again in like manner led over the guide bar, and passed to the third or next
succeeding die.
In this way, each die of the series is brought to act upon the wire in turn, the
cylinder giving the wire the requisite draught until it reaches the last die of the series.
This die has an independent support situate in advance of the cylinder, to bring it
opposite the finishing or take-up drum D.
The shaft of the cylinder C is fitted with fast and loose pullies C³ for receiving a
hand from overhead or other driving gear. The surface speed imparted by this band
to the cylinder will be equal to, or in excess of the maximum rate of travel
intended to be imparted to the wire, and the like surface speed will be imparted to the
finishing or take-up drums which complete the drawing of the wire.
A band from each pulley C² passes down to and under guide pullies C, and thence
to the pulley D on the spindle D' of the take-up drum D; or in a group of machines,
these spindles may all be driven from a vertical spindle placed at the back of the bench,
thus enabling the draught cylinder C and lubricating trough to be continuous for
several machines.
To throw the draw bench out of action, we provide (when driving the take-up drum by
friction of contact) means for lifting the drum out of close contact with its coned
spindle, which will then rotate without acting upon the drum.
For this purpose, we mount immediately below the drum D, an excentric D³, the
pin of which is carried by a short standard on the bed, and is fitted with a hand
lever. By turning this excentric to bring its longer radius under the drum, the
drum will be lifted on its coned spindle, and thereby raised out of frictional contact
therewith.
As the cylinder has a uniform surface speed throughout its length, it will be
understood that we rely on the slip of the wire upon its periphery for the varying
rates of draw required by the wire as it becomes elongated in the process of
drawing.
If thought desirable, we may use cones instead of cylinders to effect the draught
of the wire through the dies, their diameter increasing in proportion to the elongation
of the wire.
For the purpose of utilising draw benches of the common construction, we propose
to adapt our invention thereto in the manner shown at Figs. 4 and 5, Fig. 4 being
a plan view, and Fig. 5 a side elevation of a common draw bench re-arranged
according to our invention.
In these figures, A is the bench or framing, C is an ordinary wire block driven in
the usual manner,
but utilised as the draught cylinder, and D is another such wire
block utilised as the take-up drum. F is a reel mounted upon a stud axle standing
up from the bed of the draw bench.
Between the block or cylinder C and the reel F, we insert a standard E, which is

page_text: bolted firmly to the bench, and serves to carry a group of dies e, of which 5 are
shown, but which may vary in number according to the depth of the block or cylinder
used, and the number of draughts desired to be given to the wire.
These dies are set one above another in a vertical line corresponding to the position
of the draught cylinder C, and between the group of dies and the reel a vertical
guide bar G is set up for directing the course of the wire under treatment. When it
is desired to employ more dies than can be placed in a vertical position within the
depth of the draught cylinder, two or more upright die holders and guide bars may
be used.
e is the last or finishing die set between the cylinder C and the drum D, but to
one side thereof, or in a line drawn from the periphery of the cylinder to that of the
take-up drum.
In working with a draw bench thus arranged, the wire is led from the reel F past
the guide bar G, preferably to the uppermost die e, whence it passes to the cylinder C,
around which it is lapped; the wire then returns to the guide bar G, and passes
through the second die e of the set, thence to the draught cylinder, as before, and
back to the guide bar.
In this way, it is led through all the dies e of the set, and passes eventually from
the cylinder C to the finishing die e*, and thence to the take-up drum D.
Figs. 6 and 7 shew, in plan view and side elevation, a further modification of the
common draw bench, in which the drum D is mounted on an extension of the vertical
shaft C, the working being the same as in the last named arrangement, but one
vertical spindle only being required for each machine.
The advantage of this arrangement over that last described, is, that an economy
of space is obtained without any material draw-back to the action of the machine.
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 apparatus for drawing wire in which the slip of the wire is relied on for
effecting automatically the regulation of the draught, the combination with a.
compound die holder, of a guide bar and a draught cylinder, or their equivalents,
for guiding the wire and drawing it through a set or series of dies, as and for the
purpose above set forth.
Dated this 5th do 1000