An Automatic Stopping Device or Mechanism Termed “Yarn-stop ” for Twiners or Twisting Frames.
Year: 1899

page_text: Date of Application, 6th Jan., 1893-Accepted, 4th Mar., 1899
COMPLETE SPECIFICATION.
An Automatic Stopping Device or Mechanism Termed “Yarn-stop ”
for Twiners or Twisting Frames.
I, JEAN FRANÇOIS GÉRARD, of Wauthier-Braine, in the Kingdom of Belgium,
Spinning Mill Proprietor, 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 has for object a stopping device termed "yarn-stop" designed
to be applied to twiners or twisting frames for effecting automatic and instanta-
neous stoppage of broken yarn or threads or when a part consisting of only a
single filament is passing from the drawing and pressing rollers to its bobbin.
The use of this device prevents waste and defects in the twining operation and
reduces the cost of hand labour in that it permits of the speed of the machine
being increased and of the attendant being entrusted with the supervision of
a larger number of spindles.
In the accompanying drawing,
Figure 1 is a front elevation of a portion of a continuous twiner to which
my invention is applied.
And Figure 2 is a sectional side elevation thereof.
In these figures, A is the drawing out cylinder and B the pressing roller
between which the yarn passing to the spindles travels and F is the batten which
carries the glass.guides L.
Below the batten F is fixed a support E the free end of which, extending under
the cylinder, A, carries a pivot e on which the stopping piece C is mounted. The
front portion of this piece C has a curve about the same as that of the periphery
of the cylinder A and at the end D of its curved part it is tapered or wedge
shaped and faced with leather or analogous material. This stopping piece C
is so mounted on its pivot e that the straight rear portion is heavier than the
curved front portion the effect being that when the piece is free to oscillate on
its pivot, its curved front part approaches the cylinder A. This curved part
carries upon its side a knob or roller G over which the yarn on leaving the
cylinder A passes and the said curved part is held away from the cylinder A
by the tension of the yarn which suffices to keep the rear end of the piece C raised.
When the yarn breaks the requisite tension being no longer exerted upon
the curved part of the piece C, the rear part of the latter drops, and the end D
of the curved part is thus driven between the cylinder A and the pressing
roller B between which it is then drawn by their rotation, the effect being to
raise the roller B as shown in broken lines in Figure 2, and to instantly stop
the feed.
As soon as the roller B is out of contact with the cylinder A the broken yarn
is stopped.
When a part of the yarn consisting only of a single filament is passing from
between the roller B and cylinder A the pressure of the piece C suffices to break
the came and the stannon than takes place as shows stated

page_text: During the stoppage, a wire H mounted in oscillating supports K and extend-
ing the whole length of the twiner or twisting frame, is raised by hand for the
purpose of supporting the pieces C, as shown in broken lines in Figure 2, until
the broken thread or threads has or have been mended.
I do not limit myself to the details of construction described and represented!
as these may be varied without departing from the essence of my invention.
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 I
claim:―
First: A device for application to twiners or twisting frames for producing
Butomatically instantaneous stoppage of broken thread on breakage thereof the
said device, consisting of an oscillating piece one end of which is tapered or
wedge shaped and faced with leather or analogous material, the said piece being
mounted upon a pivot, in such a manner that its tapered end is held away from
the drawing out cylinder and the pressing roller by the tension of the thread
passing from the said cylinder to the spindles, and so that, when the said thread
breaks, the said piece oscillates upon its pivot and its tapering end becomes
engaged between the cylinder and the roller the rotation of which is thereby
stopped.
Secondly: The device herein before described with reference to and illustrated 2
in the accompanying drawings in combination with a twiner or twisting frame
for the purpose of producing automatic stoppage of broken yarn in such a machine.
Date A
T
1000
W. T. WHITEMAN,
Agent for the Applicant.