Improvements in Machines for Drawing or Preparing Flax, Hemp, Jute, Cotton, Silk, and other Textile Fibres."
Year: 1897

page_text: Date of Application, 18th Oct., 1897-Accepted, 24th Dec., 1897
[Communicated from abroad by GIUSEPPE ROI of Vicenza in the Kingdom of
Italy.]
66 Improvements in Machines for Drawing or Preparing Flax, Hemp,
Jute, Cotton, Silk, and other Textile Fibres."
•
I, DAVID YOUNG, Patent Agent, of the firm of D. Young & Co., of 11 and 12
Southampton Buildings, London, W.C., do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
The object of the present invention is to infallibly assure that, at the entrance
to the machines for the preparation of textile fibres called " drawing-frames,"
none of the predetermined number of slivers may fail to be doubled; it being
understood that the apparatus in question is applicable to machines for the pre-
paration of different textile fibres, such as flax, hemp, jute, cotton, silk and the
like.
The said apparatus is based on the following principle which forms a character-
istic part of the invention:-If, in the above-mentioned class of machines, the
sliver of textile material breaks or comes to an end at the entrance to the drawing-
frame, and if this breaking or ending is noticed immediately and the movement of
the machine is automatically stopped at once, so that the worker attending the
machine is obliged to intervene to replace the broken or ended sliver, it is indubit-
able that none of the slivers can be omitted from the predetermined doublings.
Notice of this omission and the immediate stopping of the machine may be pro-
duced simultaneously by electrical means, as is shown, by way of example, in the
accompanying drawing, which shows in a diagrammatic manner the essential parts
of a drawing-frame.
This
The small roller or pulley a, mounted on the side of the frame of the machine,
and which carries the sliver n of the textile material to the entrance to the drawing-
frame, has a lever b of electrically conductive material applied thereto.
lever b is pivoted at c, and, by reason of its weight, is constantly in contact with
the face of the pulley a except when the sliver is between them.
The lever is insulated at its pivot in any convenient manner from the rest of
the machine, for the purposes which will be shown later, whereas the pulley a
formed of an electrically conductive material, is electrically connected to the
frame of the machine.
The sliver of textile material, in passing over the face of the pulley a, prevents
the lever b from coming in contact with the surface of the said pulley and by its
electrical resistance interrupts, at this point, an electrical circuit shown diagram-
matically in the drawing.
This circuit is set up with an electric battery d or any other suitable generator.
One of the poles e of the generator is connected, by a conducting wire, to the
lever b; whilst the other pole f is in electrical communication with the binding
screw g of an electrical apparatus formed by one or more electro-magnets, which,

page_text: at the time of the passage of the current, either directly, or by means of levers,
or by means of any of the already known methods, cause the displacement of a
detent k.
This detent by its displacement, permits the rod or lever i which bears the
striking fork controlling the belt to be pushed preferably by the action of a counter
weight, spring or the like, so as to carry the belt, which transmits motion to the
machine, from the fixed pulley onto the loose pulley and thus stop the machine.
Starting from the other binding-screw h of the electrical apparatus is another.
conductor ending at in the frame-work of the machine. It is obvious that,
during the proper working of the machine, the electric circuit is only interrupted
at the point where the sliver'n of the textile material passes over the pulley and
by reason of the electrical resistance due to the thickness of the sliver.
Now, if the sliver breaks, the lever 6 will come into contact with the face of the
pulley a and then the electric circuit will be closed and will therefore be traversed
by an electric current, which, besides causing the sounding of a bell or other
alarm, included at any convenient part within the circuit of the battery d, will put
in motion the electrical apparatus g, h for stopping the machine in the above-
described manner.
It is obvious that I may modify the details of the apparatus here described, to
adapt the same for use with other machines of the same class but differing in con-
struction, without departing from the nature of my said invention.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is :-
The employment, in combination with a drawing-frame, of an electric circuit
which, in the normal working, is kept interrupted or broken by means of the
electrical resistance of the sliver of textile material fed to the machine, but which is
completed or closed if the sliver of textile material breaks or comes to an end, so
as to cause the sounding of an alarm and the stoppage of the machine, substantially
as hereinbefore described, with reference to the accompanying drawing.
Dated the 18th day of October 1807
D. YOUNG & Co.
11 & 12 Southampton Buildings, London, W.C.,
Agents for the Applicant.