Year: 1886

page_text: Date of Application, 9th July, 1886.
Complete Left, 6th Apr., 1837.
Complete Accepted, 7th June, 1887.
We, ALFRED SOHIER BOLTON and THOMAS BOLTON, both of Oakamoor Mills, near
Cheadle, in the County of Stafford, Copper and Brass Manufacturers, do hereby
declare the nature of this invention to be as follows:-
The object of this invention is to carry on the process of wire drawing through
several stages at one continuous operation, by means of apparatus more simple and
efficient than that heretofore employed.
It is well known that when passing wire through a series of dies set in one draw-
bench, the wire, after leaving each successive die, requires that its draught shall be
quickened, in order to compensate for the increased length of the wire after each
successive drawing. To provide for this, driving gear of more or less complexity and
efficiency has been proposed.
In carrying out this object according to our invention, we provide a double system
of compensation, by a simple arrangement of mechanism; thus, the blocks or drawing
rollers, which we employ for drawing the wire through the several dies in succession,
we make conical, and secure them to their respective shafts by means of a feather and
groove.
The wire to be drawn, passing from the reel to and through the first die, is lapped
around the first conical block, or drawing roller, then passed through the next die,
and laid around a second coned block, and so on, until the last die is passed, when the
finished wire is secured to the take-up drum.
The shafts of the coned rollers which we drive either one from the next, or by any
other mechanical arrangement, run at different speeds, differential band pulleys being
so arranged that the maximum surface speed imparted to the take-up drum will be
gradually reduced to a minimum on reaching the first coned roller shaft, which shaft
derives its motion from the last coned roller shaft of the series.-This gives a rough
differential speed to the apparatus, but to secure a finer adjustment of the draught, we
provide for the endway adjustment, on their shafts, of the coned blocks or rollers
around which the wire is laid.-By shifting these coned blocks end wise, and securing
them in their adjusted positions, by any suitable mechanical contrivance, we ensure a
D
071

page_text: maintenance of a proper draught of the wire throughout the whole length under
treatment, and thereby effect a steady progressive drawing of the wire from the
commencement to the finish of the operation.
When taking the rotary motion for each block shaft from the shaft immediately in
rear of it, the advantages above indicated may be equally obtained by making the
band pulleys conical, and the blocks or drawing rollers cylindrical. These latter we
key to their respective shafts, and provide adjustable belt shifters for the endless
driving belts on the coned pulleys.
From the foregoing it will be understood, that when the speed of the main driving
strap is adjusted, the speed of all the blocks or drawing rollers will be simultaneously
adjusted.

page_text: We ALFRED SOHIER BOLTON and THOMAS BOLTON, both 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:-
The object of this invention is to carry on the process of wire drawing through
several stages at one continuous operation by means of apparatus more simple and
efficient than that heretofore employed for the purpose.
It is well known that when passing wire through a series of dies set in one draw-
bench, the wire, after leaving each successive die, requires that its draught shall be
quickened, in order to compensate for the increased length of the wire after each
successive drawing.
C
To provide for this, driving gear of more or less complexity and efficiency has been
proposed. In carrying out this object according to our invention, we provide a double
system of compensation by a simple arrangement of mechanism, which we will now
proceed to describe, reference being had to the accompanying drawing.
Fig. 1 is a side elevation of a draw-bench fitted with eight dies through which the
wire is passed to receive eight successive drawings at one operation; and
Fig. 2 is a plan view of the same.
Upon the bench A are mounted, in the usual manner, the dies B, B, B, set at
suitable distances apart, and between these dies are mounted blocks or pulleys CCC
for imparting a traverse motion to the wire.
These blocks C are carried by axles C, which turn in bearings fitted to the draw-
bench, and they are adjustable endwise on their axles for the purpose to be presently
described.
D) is a reel mounted loosely on a fixed axle D' standing up from the draw-bench.-
This reel is charged with the hank of wire to be drawn, and is free to turn to deliver
its wire under the stress of the draught imparted thereto during the drawing
operation.
E is a vertical shaft mounted in a foot step carried by the end framing of the
draw-bench, and projecting upwards through a fixed collar or bearing fitted to the
upper face of the bench.
Fis the finishing block for taking up the wire and maintaining a proper draught
thereon as it leaves the last of the serios of dies B.
This finishing or take-up block is locked to its shaft so as to rotate therewith.
Rotary motion is imparted to the axles C" and to the vertical shaft E from a
transverse driving shaft G, having its bearings on the frame of the draw-bench.
This shaft G is provided with fast and loose driving pulleys G', which receive the
driving belt from any prime mover.

page_text: Keyed also to the shaft G is a pulley G for transmitting rotary motion to the axles
of the several blocks C, and a mitre wheel G³ for giving motion, through a mitre
wheel E', to the shaft E on which it is keyed.
The several axles carry pulleys C2, which receive and transmit motion through
driving belts or bands H from the main driving shaft G to the last axle of the series
of blocks C.
4
It will be seen that each axle is fitted with two pulleys of different diameters, the
smaller pulley of the axle nearest the delivery end of the bench being in line with the
pulley of larger diameter on its next adjacent axle, and so on throughout the series,
the smaller pulleys being arranged alternately at the right and left of the larger pulley
on their respective axles.
The blocks or pulleys which we employ for drawing the wire through the several
dies in succession we make conical, and secure them to their respective axles by
means of binding screws. The wire to be drawn passing from the reel to and through
the first die B, is lapped around the first conical block or drawing pulley C, then
passed through the next die, and laid around a second coned block or pulley, and so
on until the last die is passed, when the finished wire is secured to the take-up
block F.
The arrangement of belt driving just described in connection with the axles Cis
intended to run them and the coned blocks which they carry at speals gradually
decreasing from the last to the first of the series of blocks C, and the surface speed,
and consequently the draught of the take-np block F, will be slightly in excess of the
surface speed of the last of the series of the coned blocks or pulleys. This arrange-
inent gives a rough differential speed to the apparatus, but to secure a finer adjustment
of the draught, we provide for the endway adjustment, on their shafts, of the coned
blocks or pulleys around which the wire is laid. By shifting these coned blocks
end wise on their axles before commencing work, and securing them in their adjusted
positions by the binding screws, or by any suitable mechanical contrivance, we ensure
the maintenance of a proper draught of the wire throughout the whole length under
treatment, and thereby effect a steady progressive drawing of the wire from the
commencement to the finish of the operation.
When driving the axles C₁ from the next adjacent axle, the band pulleys may be
made conical, and the blocks or drawing pulleys cylindrical, the pulleys being keyed
to their respective shafts or axles, and adjustable shifters being provided for the
endless belts on the cone pulleys. This arrangement is illustrated in the plan view
Fig. 3, where the same reference letters are used as in the draw bench Figs. 1 and 2.
In this Figure, H'H' are the belt shifters for varying, as required, the relative speeds
of the blocks CC. By this arrangement the advantage is obtained, that when one
belt is adjusted, the speeds of all that derive their motion therefrom are adjusted
by it.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed, we declare that what we claim is:-
The means above described for obtaining an adjustable differential speed for the
drawing blocks or pulleys of draw benches."
Dated this 5th day of Anril 1887
NEWTON & SON,
Agents for the Applicants.