Year: 1886

page_text: I, HERBERT JOHN HADDAN, of 67 Strand, in the County of Middlesex, Civil
Engineer, do hereby declare the nature of this invention, a communication to me
from abroad by Emil Deutgen, Manufacturer, of Düren, in the German Empire,
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:—
This machine serves for the manufacture of spiral springs from steel-or iron-
wire, in a cylindrical shape, as employed for bolster springs; the machine however,
may also be used for the manufacture of any differently wound wire springs.
The following description shows, for instance, the manufacture of bolster springs.
These springs in double conical shape are supposed to be known. It may, however,
be remarked, that the particular requirements for a perfectly suitable shape are
especially, that in the middle the single windings of the spring be not only narrower
in diameter, but also that the lateral deviation of the same be smallest in the middle,
and that, towards the extremities, also the lateral deviation, according to the larger
diameter, be always larger, to ensure uniformity or equality of the strains produced
by a pressure on the spring, whereby its energy is considerably increased. Finally
the last convolutions should be wound straight, that is to say rectangular to the
axis of the spring, for obtaining a straight position and a straight pressing surface
of the spring.
In the annexed drawing Fig. 1 is a rear view, Figs. 2 and 3 are side views, and
Fig. 4 is a plan of the machine.
Fig. 5 is a cross section for showing the motion of the transport tubes and of
the rolls for supplying the wire. Fig. 6 is an upper view of the shears and of the
feed motion lever.

page_text: ine machine automatically winds the wire RO
cuts off the coiled spring.
The machine works as follows:
aloremention sape and
Motion is produced by the pulleys a, situated on the driving shaft a³, which sets
in motion the wheels b and 6, the latter being mounted on the shaft c. On this
shaft is placed the laterally movable clutch coupling c¹, which gears into the coupling
wheel and thereby actuates the wheel c³. These wheels are fixed to the loose
tubes c and c, and at their fore end are situated the draw pulleys d and d², pro-
vided with straps and intended to produce the feed of the wire. At or near one
extremity of the axle c are placed the transmission-and changing-wheels e e¹ e³
EEE, which produce the revolution of the axle f, the eccentric or cam g and the
releasing lever h serving to stop the draw pulleys d and d', which must take place,
as soon as each completely coiled spring is to be cut off by the shears. The axle f
is turned once for each spring, and according as a small or large change wheel e¹
is inserted, the size of the spring or the length of the wire for a spring is small or
large. On the axle f is situated the eccentric i, which has an eccentric shape at
the circumference as well as on the side. With this eccentric is connected the guide
lever k, which is rendered adjustable by means of a roller holder, according as the
wire to be wrought is hard or soft.
The guide lever carries in front a strap pulley, according to the position of which
the wire, proceeding from d' and d, is rolled or the spring wound, the diametrical
shape of the springs and the lateral shape of the eccentric determine the lateral
deviation or pitch and the straight extremity of the last convolution of the spring.
To allow the guide lever k free motion in any direction, the same is provided with
a ball and socket bearing and held by pivot kl.
The axle fand the axle m situated under the same are furnished with two tooth
wheels n and n¹ of the same size. On this axle m is situated the shears-eccentric m¹,
which is in contact with the shears through the rod m³. The shears m³ are to be
set higher or lower on the machine frame according to the diameter of the spring,
and the wire is fed under the cutting edges of the shears by means of the feed
motion lever o, which first receives a start or lead by means of the curved slot and
subsequently rises uniformly with the upper part of the shears. By means of the
slide bearing p and the elasticity of q, the wire is clipped in the strap pulleys and
conducted to the bending roller on the guide lever.
The wire is pressed in the strap pulleys and d, thus led towards the roller on
the guide lever k and there, according to the shape of the eccentric i, bent into a
spring, the wire length of which is determined by the size of the change wheel e¹.
The spring being wound, the clutch coupling c¹ is released by the eccentric g and
the lever h, and the wheels c and c and thereby also the tubes c' and c with the
draw rollers d and d, with the wire are stopped, whereupon the shears are caused
to cut off the spring by the eccentric m¹; subsequently the clutch-coupling c¹
comes again into gear, after which the winding of the following spring begins etc.
The machine produces therefore, in short, the following effect:
The shape of the spring is formed not only as regards its diameter, but also at
the same time in its lateral rise or inclination and with straight or suitably con-
verging extremities, corresponding to the shape of the exchangeable eccentric and
simultaneously in both directions, in as much as this eccentric, peculiarly shaped in
diameter and at the side, so moves a guide lever with grooved roller, that thereby
the wire is bent simultaneously in the aforementioned two directions, and according
to the shape of both sides of the eccentric, a spring of any suitable shape can be
produced.
Having now particularly described and ascertained the nature of this invention
and in what manner. the same is to be performed, I declare that what I claim is
A machine for coiling spiral springs, characterised by the feature, that the wire,
fed or supplied by rollers d and d¹, is bent by means of a bending roller and

page_text: brought into a shape determined by the position of lever k carrying the said bending
roller, and by the shape of exchangeable eccentric i, and in which machine the feed
mechanism is stopped by means of disc g and lever h, after the bent wire or the
spiral has attained the desired length, and the wire is cut off by shears m³, set in
motion by cam m³ and rod m³, after the wire has been placed under the shears by
the lever o.