AN IMPROVED TENSION APPARATUS FOR USE IN SPINNING AND DOUBLING FRAMES FOR THE PURPOSE OF PREVENTING DOUBLES AND WASTE OF THREAD
Year: 1884

page_text: [Communicated from abroad by the firm of Bernert and Desoutter, of
Amiens (Somme), in the Republic of France, Manufacturers.]
I JOHN HENRY JOHNSON of 47 Lincoln's Inn Fields in the County of Middlesex
Gentleman do hereby declare the nature of said Invention for "AN IMPROVED
TENSION APPARATUS FOR USE IN SPINNING AND DOUBLING FRAMES FOR THE
PURPOSE OF PREVENTING DOUBLES AND WASTE OF THREAD," and in what
manner the saine is to be performed to be particularly described and ascertained
in and by the following statement :-
This Invention relates to a tension apparatus to be employed in connection
with spinning and doubling frames or machinery for the purpose of preventing
the "doubles" which are caused on the breakage of a thread by the end of the
broken thread being taken up by the adjacent plyer thereby producing what is
technically termed a "double" which causes serious defects in the fabrics made
from the thread or yarn as each of such "doubles" forms a ridge or blemish in the
said fabrics. The apparatus constructed according to this Invention also prevents
the waste of material resulting from a thread being wound upon the cylinder and
roller so that the tenter may be engaged at the other side of the machine without
there being any danger of producing untwisted threads. The apparatus also
maintains the unbroken threads at a uniform tension and thus tends to prevent
accidental breakage. The Invention effects a saving of labour and at the same
time prevents waste of materials.
And in order that the said Invention may be fully understood I shall now
proceed more particularly to describe the saine and for that purpose shall refer to
the several Figures on the annexed Sheet of Drawings the same letters of reference
indicating corresponding parts in all the Figures.
Figure 1 of the accompanying Drawings represents a portion of a spinning and
doubling frame with an apparatus constructed according to this Invention applied
thereto and Figure 2 is a plan of the said apparatus..
Figures 4 and 6 represent modifications hereinafter referred to.

page_text: The apparatus consists essentially of a lever A pivotted on a suitable pin or
support at B and provided at one extremity with a cutter C preferably of steel
and of a heart shape with cutting edges meeting at an acute angle at a to facilitate
the cutting action. The other extremity of the lever A is provided with an open
eye or hook D or the equivalent suitably rounded to avoid injuring the material
and resting upon the yarn or thread which is indicated by a dotted line X X in
Figure 1. The centre B on which the arm A is supported is carried by a plate E
attached to the frame of the machine by screws as at vand provided with a slot
or opening b (Figure 3) for the passage of the yarn or thread. The lever A is
preferably formed of steel wire twisted so as to form suitable bearing at the
centre B and is bent so as to clear the lower roller G as shewn clearly in
Figure 1.
When a thread or yarn breaks the eye or hook D at the end of the lever A
is deprived of support and the lever A consequently turns upon the centre B and
presents the cutter C to the yarn or thread ✗ which is immediately severed by
the cutting edges at a before the thread or yarn reaches the drawing rollers G
thus preventing the waste of material and doubling that would otherwise ensue
by the broken yarn being continually drawn forwards by the rollers G and
becoming entangled with the adjacent yarn or thread. The form of the plate E
may it will be evident, be modified according to the nature of the frame or
machine to which the apparatus is applied. Figures 4 and 6 represent by way of
example a modification which may be adopted in carrying out this Invention and
which will be readily understood from the preceding description as the parts are
marked with letters of reference corresponding to those used in the preceding
Figures.
The lever A is so adjusted that the hook or eye D maintains the yarn or thread
at the proper tension and thus renders it less liable to break between the rollers
and the plyer.
Having now particularly described and ascertained the nature of said Invention
and in what manner the same is to be performed I declare that what I claim
is:-
First For use in spinning and doubling frames a tension apparatus consisting
of a pivotted or centred lever provided at one extremity with a hook or equivalent
device to be supported by the unbroken yarn or thread and at the other extremity
with a cutting device substantially as and for the purposes herein before described
and illustrated in the accompanying Drawings.
Second For use in spinning and doubling frames a tension apparatus consisting
of a lever formed of a piece of wire twisted so as to form a socket for the reception
of a pin or pivot upon which the said lever oscillates and provided at one extremity
with a 'hook or eye or the equivalent thereof for bearing upon the yarn or thread
at a point situated between the drawing rollers and the plyers and at the other
extremity with a heart shaped cutter which when the apparatus is in place on
the frame is in proximity to the yarn or thread before it reaches the drawing
rollers substantially as hereinbefore described and illustrated in the accompanying
Drawings.
D
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