Improvements in the Manufacture of Artificial Silk Thread, and Apparatus therefor.
Year: 1899

page_text: Date of Application, 2nd Jan., 1399-Accepted, 29th Apr.,
1899
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Artificial Silk Thread, and
Apparatus therefor.
I, ROBERT WILHELM STREHLENERT, of No. 2, Swedenborgsgatan, Stockholm,
in the Kingdom of Sweden, Civil Engineer, 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 folowing statement:
While carrying out into practice the invention described in the specification of
the British Patent No. 3832 of 1897, alterations and simplifications in the mode
of spinning, and in the apparatus, were suggested to the mind of the inventor,
with reference to the immediate catching up of a broken strand by an adjacent
unbroken one, and this facilitating continuous spinning. Starting from the said
patent, in which the prepared silk solution is pressed or drawn out through
mouth-pieces or groups of mouth-pieces, which move in a continuous or closed
path, it is now found that a material advantage may be obtained by the use of
the simplified spinning machine shewn in Fig. 1 of the accompanying drawing.
This machine has only one mouth-piece, provided with a ring of holes for the
discharge of the solution. As each of these holes corresponds to a mouth-piece
with one hole, as described in the specification above mentioned, and as the holes
are not situated in the axis of rotation of the mouth-piece, said holes will, as the
mouth-piece rotates, move in a continuous or closed path, and the pressed-out
strands will twist round one another. A is the mouthpiece, connected, us
before, to a cylinder or tube B, communicating with the pressure conduit for
the prepared solution. This cylinder is rotated on its axis by means of a worm
gear D, E, or other suitable device. The streams which are pressed out through
the holes of the mouthpiece, and which, after their coagulation, form the strands,
meet together on a pulley wheel or in a knee-bent tube. The solution is
preferably pressed out into water contained in a receptacle in connection with
the tube which leads the united strands out of the apparatus. The water absorbs
the solvent of the silk, and should therefore be renewed by constant flow of
water from a drip pipe which enters the funnel M, or equivalent vessel, into which
the mouth-piece descends. The water flows away through the knee-bent tube
N. The cylinders with mouthpieces described in the above-mentioned patent
may be supplanted by a single rotating cylinder having one or more mouth-pieces,
which are provided with holes for the passage of the solution, and which move in a
continuous or closed path.
The specification of the said patent also mentions that the strands are pressed
out from the mouth-pieces below the surface of a liquid, which partly is caused
to rotate in the same direction as the mouth-pieces in their circular path, and
partly flows in the direction in which the strands are pressed out from the mouth-
pieces. An alteration of said method, and in the apparatus for carrying out the
same, has resulted in the apparatus shown in Fig. 2, the essential difference of
this apparatus from the anterior one being contained in the feature that the
cylinder B and the mouthpiece A, which in this case does not rotate, do not move

page_text: in a continuous or closed path, but are still or stationary. As the liquid in the
funnel or vessel M. is caused to rotate in consequence of the oblique position of
the tube C, as described in the patent above mentioned.
I find that I am able to rely exclusively on the said rotation of the liquid, to
carry the end of a broken free strand to and round the unbroken strands, so that
the end will move down to and pass the pulley or the knee-tube, and thereby be
led to and wound on the bobbin. In consequence of the rotation of the water
during its passage downwards in the vessel, and then in the tube, the strands are
turned or twisted between the mouthpiece and the knee, as well as between the
knee and the bobbin. The mouthpiece or mouthpieces A may obviously have
one or more holes for the pressing out of the solution, no matter how said holes
are placed, but, as will be understood, no rotary movement of apparatus will,
according to this part of my invention, be needed for attaining an effectual
catching of the bioken strands.
Having now particularly described and acsertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. In spinning artificial silk after the manner described in the specification
of British patent No. 3832 of 1897, the means hereinbefore explained with
reference to the drawings, for ensuring the catching up of a broken strand by
the others, on their way to the bobbin, in the manner set forth.
2. The apparatus for spinning artificial silk substantially as described with
reference to Fig. 1 of the drawing.
3. The apparatus for spinning artificial silk substantially as described with
reference to Fig. 2 of the drawing.
Toted thin 1800"