Year: 1887

page_text: Date of Application, 20th Sept, 1887
Specification Accepted, 8th Nov., 1887

page_text: T. Guide pulleys for Rope S.
Two parallel iron girders A. A. from twenty to thirty feet long extend from either
side of a Cylinder or drum B3 which is placed in the centre between the two sets
of girders.
The girders are connected at either end by cross pieces C and are supported on
short iron pillars or feet.
At the extremity of each set of girders a die seat D is provided which contains the
die E.
The die seats are moveable so that they can be fixed nearer to or further away from
the drum according to the length of the rod or tube F which is to be drawn.
The die may also be moved in a vertical or horizontal direction by means of suitable
set screws d so as to adjust itself to the centre of the draw wire G and clutch I and so
ensure the rod being drawn in an almost straight length from end to end.
The dies E at either end of the machine are so placed that they are opposite the
corresponding end of the wire cables G. G¹ wound round the drum B.
The drum is actuated by means of spur gearing O. P. or by worm and wheel, and
is so arranged that by shifting the belt, the direction in which it revolves can be
readily reversed.
At the same time the drum B receives a horizontal or transverse motion in the
direction of its axis K by means of a suitable screw L formed upon its shaft or axis K
and arranged to work within a corresponding nut N. for the purpose of keeping the
line of draught of the draw-wire G and crosshead H in a direct line to that of the
die itself.
A wire cable G. G₁ of sufficient length is wound a few turns around the drum B
and is provided at either end with a strong hook or clutch, the cable G being secured
to the drum.
The said hook takes hold of a crosshead H within which is a clutch or other
suitable form of gripping device I for the purpose of holding the end of the rod F to
be drawn through the die E.
The crosshead H moreover is provided on either side or on top and bottom with two
small steel rollers hh running in a suitable channel or ledge a. a projecting on either
side of the girders A. A so as to cause the crosshead H to move in an absolutely
straight and true line between the girders.
As soon as the wire cable G. Ghas drawn a rod through the die at one end of the
Machine, the other crosshead is in a position suitable for drawing a second rod in,
through the other dies having been brought into this position by means of a small wire
rope S. running over a pulley T one end of which is secured to the crosshead H and
the other end being pulled forward by a falling weight secured thereto, or by other
suitable contrivance.
The Rods (before being drawn through the die, which is from one sixteenth to one
eighth of an inch smaller in diameter than the rod itself; are pickled for a few hours
in weak acid, and then washed in water) are delivered from the Machine with a
perfectly smooth surface, owing to the compression which they have received during
the process of drawing; and of greatly increased strength.
They are but slightly curved on account of the centre of the die being accurately
adjusted as above described in a line with the centre of the draw wire and grippers;
and only require one turn in a straightening and polishing machine to make them in

page_text: every way superior in intrinsic value to turned shafting; while on account of the
great capacity of the double acting Machine and the very moderate cost of the same,
in comparison with other known forms, together with its extreme simplicity of
construction, the cost of manufacture is very much reduced whilst the production is
far superior.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is;
1. A Machine for Cold drawing Rods or Tubes having a steel rope passing around
a suitable drum and arranged so as to be capable of operating from either end of the
Machine alternately.
2. In a double acting Machine for Cold drawing Rods or Tubes, the construction
and arrangement of a winding drum provided with an automatic transverse motion
whereby the line of draught is at all times kept central with that of the Die.
3. In a Machine for Cold drawing Rods or Tubes the arrangement and general
construction of the die seat and Dic, whereby the latter can readily be adjusted to suit
the line of draught.
4. The general construction and arrangement of a double acting Machine for the
purpose of Cold Drawing Rods or Tubes, substantially as described and set forth on
accompanying sheet of drawings.
Dated this 19th day of September 1887