Year: 1886

page_text: I, EMIL TÄNZLER of Lennep, Rhine Province, in the German Empire, Superin-
tendant of Spinning Mills 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 ropes for effecting the going-in motion of the carriages of selfactor mules
were heretofore connected at one end to the spiral cams that effect the drawing-in,
while the other ends were wound on tightening barrels on the middle part of the
carriage. With this arrangement the jerky action of the spirals upon the ropes
effects a rapid wear of the latter and owing to differences in their length or degree
of elasticity, they are also subject to different strains.
My invention has for its object to obviate these disadvantages, as I will explain
with reference to the accompanying drawings, in which Fig. 1 shews a plan of the
improved drawing-in gear, and Figs. 2 and 3 shew enlarged details of the apparatus.
CC are the drawing-in ropes, the one end of which are connected as usual to the
drawing in cams A. A. The other ends of the ropes are however not connected as
heretofore to a tightening barrel, but to an apparatus B which is connected to the
middle part of the carriage. This apparatus is constructed as follows. D is a
tightening barrel fixed to the carriage; to a pin on this barrel is attached one end
of a chain k, the other end of which is hooked on to the hook of a bolt g on which
are mounted loosely two cross bars e and h. To the bar e are fixed two bolts f
that pass freely through two holes in the bar h. Upon the bolts f, f, g, are mounted
three strong helical springs i that tend to press the two bars apart. Upon the free
end of the bolt g are screwed two nuts that transfer the strain put upon the bolt to
the bar h. The ends of the ropes C C are attached to the cross bar c. Thus it will
be seen that the strain put upon the bolt g by the tightening barrel is transmitted
by bar h and springs i to the bar e which in its turn exercises the required tightening
effect upon the ropes.
This arrangement has the following considerable advantages over the ordinary
mode of connecting the ropes. In the first place the ropes do not suffer from the
necessarily jerky manner in which the strain is put upon them by the spiral
drawing-in cams.
Assuming the carriage to be entirely drawn out, then, after the knocking off, the
sudden putting in gear of the drawing-in brake causes, with the old construction,

page_text: a sudden and powerful straining of the drawing-in ropes. This sudden straining
of the ropes is prevented by the present improved arrangement, as the pull exerted
by the cams is in the first instance expended in compressing the springs i ii.
The carriage consequently moves inwards without any jerk. Towards the end of
the motion the carriage overruns, so that the ropes become slack, and the springs i
consequently expand again, but at the last part of the drawing-in motion of the
cams, the ropes are again stretched and the springs are consequently compressed.
At this moment in particular the improved apparatus operates very beneficially;
as the greater part of the ropes is wound on, the sudden straining thereof by the
cams cannot be taken up by the elasticity of.the ropes themselves, and consequently
a rapid wear of the ropes would be caused without the improved apparatus. With
the latter, the carriage is brought quite gently against the buffers.
Another advantage arises in the compensation afforded for any difference in the
lengths of the two ropes, this being effected by the cross bar e, which can assume
an oblique position if the one rope stretches to a greater length than the other.
By means of the said adjustment an equal strain is always maintained on both
ropes.
The use of the improved apparatus has the further great advantage, that the
introduction of new ropes can be more readily effected, and with less danger. If
it be desired to replace an old rope by a new one, the counter rope is released, the
chain k is unhooked from the bolt g, and, after taking out the apparatus, a new
rope is inserted and the apparatus is replaced.
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:
The use of drawing-in gear for selfactor mules wherein the two drawing-in ropes
are connected to a central tension chain through springs that are compressed by
the tension put upon the ropes, substantially as herein described.
.
Dated this 14th day of Anril 1886