Improvements in Apparatus for Drawing Wire.
Year: 1895

page_text: Date of Application, 2nd Feb., 1895-Accepted, 21st Dec., 1895
Improvements in Apparatus for Drawing Wire.
I VALENTIN BERGMANN, of 1 Landstrasse Feistritz in the Empire of Austria
Merchant do hereby declare the nature of my said invention and in what manner
the same is to be performed to be particularly described and ascertained in and by
the following statement :-
My invention has for its object a new or improved stop mechanism for winding
drums and means for preventing the drawing or tightening rollers of wire drawing
machinery from being cut, and is for the purpose of providing a stop mechanism
for the winding drums of wire drawing machinery for the purpose of preventing
the wire from breaking or snapping off, as well as means for preventing the drawing
or tightening rollers from being cut.
In order that my invention may be clearly understood and more easily carried
into practise I have appended the accompanying sheet of drawings which illustrates
a method of carrying the invention into practise.
Figure 1., is a side view.
Figure 2., a plan.
Figure 3., a vertical section on line x-x of Figure 1.
Figure 4., a vertical section on line y-y of Figure 1.
The first mentioned mechanism stops the winding drum before the wire snaps
in the case of a knot being formed and when the wire is being coiled on the
reel, so that by the use of such mechanism the principal causes of the tearing or
breaking of the wire are fully obviated. Motion is imparted to the winding
drum f with the aid of the guide rollers d and of a rope gear c, c¹ by the driving
shaft a on which the drawing or tightening roller b is keyed. The wire D as it
leaves the reel 9 passes over the first glass reel through the corrosive trough i
and through the first hole in the draw plate k returning by the guide roller b¹,
drawing roller b and another guide roller ' to a second glass reel h whence it is
passed again through the trough and through the next hole in the drawplate k,
then by the next guide roller ¹, drawing roller b and the roller in order to be
passed again through the trough i and so on. In this manner the wire is alternately
passed through the corrosive bath and around the drawing roller a number of
times equal to the number of holes in the drawplate in order to be subsequently
led over a roller r and through a reeds and finally wound on the winding drum f.
The winding drum f is loosely mounted on its shaft f1 and is coupled thereto,
when in motion, by means of a pin or bolt capable of sliding in a frame / fast
on the shaft, a spring being fitted to cause the bolt to always assume its normal
position of disconnection. The lower end of the bolt rests upon a movable plate m
arranged below the drum. The plate m rests upon pins n projecting out of the
platen of the machine and is connected by a cord p passing over rollers o with a
pulley block g around the pulley of which is coiled the wire immediately on its
running off the reel g, this wire being once more passed around the reel before it
reaches the first glass reel h. Should a knot be formed in the wire or should the
wire become entangled on the reel, the pulley block q and with it the cord is
drawn towards the reel in consequence whereof the plate m, as soon as this pull
overcomes the tension of the spring m¹ which constantly draws the plate m in the
position shown in Fig. 4 is displaced such a distance that the pins n enter the
slots m² of the plate m whereupon the latter falls down on the platen aforesaid.
The coupling pin is now expelled by the spring 1 from the recess f² and the
ID... 27
p

page_text: drum will be stopped before the tension developed in the wire has increased to
such an extent as to cause it to break. In order to lead the wire in a dry state to
the drawplate a piece of india rubber is arranged before the drawplate, upon which
the wire runs as it comes from the trough, whereby the liquid is prevented from
collecting at and corroding the drawplate and the appearance of the wire is
improved.
To protect the drawing roller 6 from the cutting action of the wire, the same is
made to assume the shape shown in Figures 2 and 3. It is constructed as a cone
pulley provided with a number of steps u corresponding to the required number of
holes in the drawplate and which are undercut in such a manner that each step is
smaller than the preceding one and larger than the following one thus forming a
cone. The wire is led to the largest diameter of a step and slides while running
one or more times around the same, to the smallest diameter until it reaches the
In this
point whence it can pass onto the next roller ¹ and so on to the roller r.
mauner the various steps are uniformly acted upon in all parts of their periphery
and thus the risk of their being cut by the wire is fully obviated. The running
edge of each guiding roller is in the plane of the largest diameter of the relative
step, the guiding rollers being carried by a common frame 62 as shown in Fig. 3.
The relative proportions of the various steps are such that the wire which has
been stretched a given length at each draw plate, is coiled on a step which has a
greater periphery correspondingly to this length.
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 :-
p
1st. A wire drawing machine characterized by a stop mechanism or device for
the winding drum consisting of a plate m resting on the pins n which holds the
with the
shaft f¹ coupled with the winding drum f and is connected by a cord
wire D which is being drawn in such a manner as to be displaced by an increase in
the tension of the wire beyond a given point and to release thus the coupling
between the winding drum f and the shaft f' substantially as and for the purpose
hercin set forth and shown.
2nd. In the wire drawing machine claimed above, a drawing roller b consisting
of conical steps upon which the wire D coming from the draw plate is so guided
by the guide rollers 6 as to be uniformly distributed in one or more coils over the
whole periphery of the steps u so as to work or act uniformly thereon, substantially
as and for the purpose herein set forth and shown.
Dated this 1st day of February 1895.
GEORGE
BARKER,
77 Colmore Row, Birmingham, Agent for Applicant.