Year: 1897

page_text: Date of Application, 3rd Feb., 1897-Accepted, 10th July, 1897
I, CARL COLLIN, of Offenbach-on-Maine, Germany, Metal Spinner, 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 :-
My invention relates to a construction of machinery for spinning metal objects, by
means of which metal capsules, or tubular blanks, produced by punching or drawing,
can be at once converted automatically by the spinning process into objects of any
desired configuration, without requiring any manipulation by hand, and without
requiring any re-heating of the object during the operation.
I will describe the said machinery with reference to the accompanying drawings in
which Figure 1 shews a front view and Figure 2 a side view of the machine;
Figure 3 is a plan, Figure 4 shews a detail of the advancing mechanism for the
pressing tool; Figure 5 is a plan of the same; Figs. 4 and 5 are enlarged views of
Figs. 4 and 5; Fig. 6 is a view of the lower part of the moveable support; Figures 7
and 8 shew respectively a longitudinal section and end view of the pressing tool to an
enlarged scale; Figure 9 shews a modified construction of the advancing mechanism
for the pressing tool; Figure 10 is a sectional side view of the same. Figure 11
shews an enlarged cross section of this mechanism; Figure 12 is a plan of the same,
and Figure 13 is a part longitudinal section.
During the operation of the machine the support a carrying the pressing tool h
performs a to-and-fro motion. This motion can be effected in such manner, that the
support is made to slide longitudinally along a guide screw spindle situated in the
middle of the framing, and actuated by means of the bar B and reversing pullies
Figure 9 in.the manner usual with known constructions of lathes.
The to-and-fro motion of the support q can however also be effected in the manner
shewn at Figure 1. The motion is in this case effected by means of a disc d having a
slot in which is a dovetail slide carrying a crank pin that is connected to the rod e
which is also provided with a slot.
This rod can be connected by means of a screw bolt with a rod e¹, which is
connected to the support by means of an adjustable pivot.
In
The disc d is actuated by means of worm 6 and worm wheel b¹, and by such motion
the support is moved to and fro on the lathe bed by means of the rods e e¹.
consequence of the adjustibility of the rods and of the crank pin x, adjustable in the
slot of the disc, the extent of motion of the support can be increased or decreased at
will, according as larger or smaller objects are to be shaped by spinning in the
machine.
The support is mounted on a slide 7 and is provided with bearings for the
pressing tool, which can slide to and fro therein. For actuating the pressing tool,
the framing carries an advancing device, which, during the to-and-fro motion of the
support, slowly advances the pressing tool h, so as to draw in or spin the metal
capsule or tubular blank upon a corresponding mould or core s'. The time occupied in
bringing the metal to the desired configuration will depend upon the arrangement of
the advancing mechanism and the speed of the to and fro motion of the support.
It would not be possible nor advisable to effect the shaping of the metal completely
during a single motion of the support, as it would be liable to tear or split, and form
creases. A good result will only be obtained when the pressing tool is slowly
automatically advanced a certain amount at each stroke.

page_text: For effecting this, the advancing mechanism is arranged as follows:
The framing carries a bracket i, the upper end of which is formed into a table; on
this table are provided arms p to which is pivotted a lever m, which may either be
single (as shewn) or in pairs, according to the nature of the article to be spun.
lever m is acted upon by a spring n' attached to the framing.
This
The upper end of the lever m carries a pawl & gearing with a bar g having ratchet
teeth, and carried by the table, which bar is caused by the action of the spring n' to
press against the part of the template ffg. In order to prevent displacement,
and to provide the bar g with an abutment when the pawl s is disengaged, the bar
is also provided with teeth at the side with which is engaged a stud c acted upon by
a spring n.
On the lower part of the support q is an adjustable cam plate o Figure 6 consisting
of a plate, on the upper cam-shaped edge of which the lower part of the lever m
bears.
When the support has arrived at its end position, the lever-m is drawn down by
the spring on to the lower part o¹ of o, by which means the pawl 8 is made to push
the bar g one tooth forward.
When the support travels in the contrary direction, the lever m is caused to rise
up on the incline of o, whereby the pawl is made to recede and engage with the next
tooth of 9:.
The spring pin c allows of such forward motion but prevents the bar, 9 from moving
backward. The template or pattern against which the pressing tool h bears is
preferably made of three parts which can turn on each other. The part ƒ of the
pattern Figures 5, 5ª is adjustably fixed to the table by means of a pin or screw.
This part of the pattern requires to be of such a form as to press the tool h closely
against the metal capsule to be shaped; the moveable second part of the pattern f¹
is moved by the bar g round a pin on the part f. Against the front edge of this
pattern the pressing tool is led. At each to and fro motion of the support the
pressing tool is advanced in a corresponding manner to the variation effected in
the template by the action of the bar g, and thus effects the gradual drawing-in
of the metal blank on to the shaped core in the same manner as would be effected by
hand.
The template, of which there must be a different one for each pattern, can also be
adjusted for enabling the metal blank to be drawn in more or less sharply.
This is effected by the part gl which is provided with a screw by means of which it
is connected to the part fi. The edge of g¹ against which the bar g bears is inade
with a curve, so that by this means a greater or smaller advance of the template can
be effected.
The arrangement can also be modified as shewn in Figs. 11, 12, and 13. The
template f¹ is in this case not moved forward by a motion acting in approximately
the same direction, but by a motion acting at right angles thereto.
The template f¹ is for this purpose provided on its underside with two lugs
carrying a screw nut through which screw screw spindles v, so that by the rotation of
the screws in one direction the template is moved forward.
The rotation of the screw spindles is effected by a ratchet gear, for which purpose
they carry ratchet wheels zz with which are engaged pawls 8 8, that are actuated by
means of the rods which are connected to the support.
The template f¹ is carried in a box mounted on the bracket i.
The rod u of the left hand ratchet wheel is pivotally connected to the rod t' of the
right hand half of the support, while the rod u of the right hand ratchet wheel is
connected by means of the rod t with the left hand half of the support. According
to the direction of motion of the support, the corresponding articulated rods are
made to actuate the pawls so as to rotate the ratchet wheels and screw spindles
whereby the template is advanced.
Above the main template f¹ Figs. 11 and 12 may be arranged a preliminary
template f, the edge of which only has a slight curvature. The pressing tool h,
Figs. 7 and 8, is preferably made with a pressing roller r, and it can be arranged to

page_text: slide telescopically in a tube h¹, for enabling its length to be adjusted. The outer
surface is preferably provided with one or more grooves into which project a guide
screw y on the bracket; by this means the pressing tool is prevented from shifting
round while it is at work.
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 :-
1. A machine for spinning hollow metal objects from tubular sheet metal blanks
upon a revolving mould or core, wherein a pressing tool carried in a longitudinally
reciprocating support, such as q, is caused in sliding in a transverse direction to bear
with its rear end against a template, such as ff', corresponding in for n to the mould
or core, which template is automatically advanced by a step by step motion at each
reciprocation of the said support, substantially as described.
2. In a machine for spinning hollow metal objects such as is referred to in the first
claim, a mechanism for advancing the template and pressing tool consisting of a
toothed bar g with which is engaged the pawl 8 of a lever m pivotted to a fixed
bracket the lower end of which lever is caused by a spring to bear upon an
adjustable cam plate o o¹ carried by the reciprocating support, whereby, at each
to and fro motion of the latter, the lever and pawl are made to advance the bar g and
template and consequently also the pressing tool, the distance of one tooth,
substantially as described.
3. In a machine for spinning hollow metal objects such as is referred to in the first
clain, a mechanism for advancing the template and pressing tool consisting of screw
spindles passing through nuts in lugs on the underside of the sliding template and
receiving a step by step rotary motion for advancing the template by means of
ratchet gear actuated by the to and fro motion of the tool support, substantially as
described.
4. In a machine for spinning hollow metal objects, such as is referred to in the first
claim, a template composed of three parts ƒ ƒ¹ g¹ of which the part f¹, rotatable on f
has on the side facing the advancing bar, a projection g¹ having a curved configuration
whereby a more or less sharply pressing-in of the metal object can be effected
according to the position to which the piece g¹ is adjusted, substantially as described.
5. In a machine for spinning hollow metal objects such as is referred to in the first
claim, a telescopic pressing tool with roller r moveably mounted upon the support q
and provided with one or more longitudinal grooves into which takes a guide screw y
so as to prevent any shifting round of the tool while operating, substantially as
described.
Dated this 3rd day of February 1897