An Improved Contrivance for Preventing Weaving Shuttles from Slipping out of their Ways.
Year: 1889

page_text: Date of Application, 18th Apr., 1889
Specification Accepted, 25th May, 1889
COMPLETE SPECIFICATION.
An Improved Contrivance for Preventing Weaving Shuttles from
Slipping out of their Ways.
I, CARL OSCAR KRAMER of Chemnitz in the kingdom of Saxony, Empire of
Germany, Gentleman, 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 an arrangement for preventing the shuttle employed in
weaving machinery from flying out of its way, thereby sometimes causing disturbance
in the weaving operation, sometimes causing damage to the reed and to the warp.
I am aware that several inventions have been made with the same end in view, but
these are mostly arranged above the upper shed and for several reasons are not so
perfect in their action as might be desired and as I believe I attain with my invention
as herein after described.
The manner in which I prefer to carry my invention into effect is shewn in the
accompanying drawings, of which
Fig. 1. is a front view.
Fig. 2. is a cross section of a lathe fitted with the contrivance.
Fig. 3. illustrates the position at the moment that the contrivance passes between
the threads of the warp.
Fig. 4. is a cross section and
Fig. 5. a ground plan of the peculiar method of fixing the draught-bar to the
weaving machine frame work.
According to my invention the lathe L carries in bearings the shaft w with which
are connected the angle-pieces f, which I will hereafter call the guides, the shape of
which may be seen in Fig. 2 and is such that they prevent the shuttle from flying
either outwards or upwards and they are conveniently provided in such a number
and placed at such a distance from each other that there are always at least three of
them for each shuttle length.
The guides are connected and fastened to each other in such a manner that they
form a firm entirety so that a push from the shuttle against either of them is borne
by them all, which arrangement renders it practicable to make the guides from
proportionally light material. According to the drawings herewith (Fig. 1) the
guides are connected with each other by means of wires or rods d' & d², the ends

page_text: of which are screw-threaded. Tubes 1 & 2 are put over the parts of the wires
lying between the guides, so that when tightening the wires by screwing up the
nuts m the whole becomes solid and firm.
At both ends of the shaft w are attached levers a, which are connected at their
upper ends, with the draught-bars z in such a manner that they can turn on their
trunnions.
The action of the contrivance is as follows:
After each shot of the shuttle the lathe moves against the fabric and of course the
shaft with guides fattached follows with it, the shaft receiving however a slight
turning motion, bringing the lathe etc. into the position shewn by dotted lines in
Fig. 2.
When the lathe moves back again the like motion takes place and the guides enter
between the threads of the warp, Fig. 3 shewing the position the moment of entering,
and Fig. 2 shewing the position of the guides to the shuttle a.
If the guides were attached directly to the lathe instead of to the shaft w, then they
would pass between the threads of the warp, nearer to the fabric, than would be
desirable, the advantage of the turning motion being to cause the guides to pass the
warp about midway between fabric and reed.
For the purpose of being able to raise the guides clear of the warp independantly
of the position of the lathe the draught bar z is fixed (generally to the machine frame
work) in such a way that by using extra force the draught bar may be moved a short
distance in the direction indicated by the arrow, which is effected by means of the
trunnions of the draught bar z resting in bearings constructed as shewn in
Figs. 4 & 5. The bearings are covered with a plato d that is held down by means
of a spring and the brasses have slanting sides. When the bar is pushed in the
direction of the arrow, the trunnions are forced out of the brasses, the lid d with its
spring giving way to the force, permitting the trunnions to slip into the brasses (12)
Figs. 4 & 5. Likewise the trunnions may be pulled back into the brasses 1. The
weaver may perform these movements by taking hold of the guides or the levers a,
Fig. 2.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, declare that what I
claim is:
1. The arrangement for preventing weaving shuttles slipping out of their ways
consisting essentially of suitable shaped guides swinging with the lathe in such a
manner, that they enter between the threads of the upper-shed shortly before the
shuttle shoots; substantially in the manner described and as shewn in the drawings.
2. The arrangement consisting in attaching the guides to a turning shaft w
for the purpose of causing the guides to pass between the threads of the warp at the
most convenient place, substantially in the manner described.
3. The arrangement of uniting the guides with each other consisting essentially of
rods or wires, with tubes interspersed between the guides and which can be screwed
up tightly substantially in the manner as and for the purpose described and as shewn
in the drawings.
4. The arrangement consisting in fixing the draught bar z in such a manner that
it can be pushed forward and backward substantially for the purpose described.