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Патент USA US2407731

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Sept- 17,1946’
Filed June 15, 1945
Patented Sept. 17,_ 1946
‘ 2,407,730 '- ‘ ‘
Cli?ord‘ H. Wethers, Detroit,‘Mich., '
‘ ‘
‘ Application June 15, 1945; Serial No. 599,583
4 Claims. (01. ave-9'0}
This invention relates to twister rolls such as
are incorporated in the spinning heads of cotton
and yarn spinning machines and has for its
object to provide in a simple and practical man
ner for the prevention of the‘yarn or material
being twisted from becoming displaced‘for any
material‘ length of time from the surface of its
individual top twist roll‘ and to provide simple
apparent as the said invention is hereinafter'fur
ther disclosed.
e‘ ,
In carrying the said inventioninto effect, I may
provide each individual upper twister roll of: a‘
spinner‘head‘ with projections extending‘ there
from and on their outer surfaces form a‘ con
tinuation of the normal peripheral rsurfacrellof
the roll, said projections providing abutment sur
faces on to which yarn may descend should it
‘means for returning the yarn to the roll‘ surface
pass over one _or other end of the roll,where?by
should it momentarily slip over the end of the
In such machines a number of short upper
twist rolls are usually positioned in co-axial ar
rangement separated by suitable bearings above
a lower twist roll, generally of larger ‘diameter,
such abutment surfaces will maintain‘ the ‘yarn
inptemporary alignment with the outer, surfaces
of the said projection for a su?icient length of
time to permit one or other of the projections,
as it rotates with the roll, to lift the yarn back
to the level of the roll surface and thereby per
mit it to travel back onto the roll as required.
the yarn passing from the creel by way of a
water trough over and vunder these upper twist
All of ‘which is‘more particularly described and
rolls, then between the upper twist rolls and the
ascertained, by way of example, having'refer
lower twist roll and partially around the lower‘
ence to the accompanying drawing, wherein:
twist roll to guides and thence through the ?yers
Figure 1 is a perspective view of an improved
to the bobbins on which the twist yarn is wound.
upper twister roll embodying ‘the said invention;
The action of the machine is such that the thread
Figure 2 is a similar view of a somewhat modi
or yarn passing around the said top twist roll
?ed form of the same;
i ‘
wanders in the direction of the length of the
Figure 3 is a front elevation showing upper and
roll, toward and from the ends thereof, and it
‘lower twister‘ rolls in relative positions; and
frequently happens that the yarn will travel too
‘ Figure 4 is an end elevation partly in section
far and thus slip over the end ‘of the roll and
‘run on‘the smaller hub or bearing, thus upsetting
Similar‘ characters of reference indicate simi
the relationship of the yarn feed to the lower
lar parts in the several‘ ?gures of vthe drawing.‘
twister roll and resulting in a- hard twist being 3
The twisting mechanism of a spinning machine
imparted to the yarn where the mechanical set
includes a lower twister roll l0 surmounted‘by‘a
up was arranged to impart a soft twist thereto.
series of upper twister rolls l I which; usually rest
This is highly undesirable and its prevention is
upon and are frictionally driven by the saidlower
very important.
' roll I0, except that yarn l2 fromthe 'creels (not
The present invention, therefore, proposes to
shown) passing over and under each roll ‘I lv‘and
provide a form of upper twist roll which will
between the said roll H and the roll it naturally’
automatically return the yarn to the periphery
effect a spacing of the rolls II and It to the ex
of the said roll with a minimum lapse of time
tent of the thickness of the yarn. This yarn
whenever the yarn should wander beyond the
also passing partially around the roll II], which
ends of the roll and. tend to fall onto the hub 40 is rotated by means well known in the art at a
or bearing thereof; and, more particularly, the
suitably determined speed, passes thence through‘
said invention has for its object to provide in
guides l3 to the ?yers and bobbins (not shown)
such a roll pick-up ?ngers ‘or projections at the
thereby completing the spinning and winding of
ends ‘thereof which will immediately intercept » the thread, technical details of which operation
any thread or yarn attempting to drop over the
need not be dwelt upon herein asthey are quite
end of the said roll and will as a result imme
old and well known in the art to which this in
diately lift the thread to the level of the roll sur
vention appertains.
face whereupon it can'again travel over such sur
The several rolls II are spaced apart in co
face and between the upper and lower twister _ -: axial relation by bearing members l4, and, in the
course of the yarn-twisting operation, itv often
roll in the manner intended.
happens that a length of yarn passing over the
Still further objects or advantages additional
roll ll and constantly changing location as to
or subsidiary to the aforesaid objects, or resulting
the length of the roll, by reason of the variable
from the construction or operation of the inven
manner in which the yarn approaches or leaves
tion as it may be carried into e?ect, will become
the said roll, passes beyond the extremities of
the roll and-thus proceeds to travel around the
hub I 5 or the bearing member [4.
This upsets '
the feed relationship necessary for the mainte
the said projections I G as the roll continues to
rotate, so that in any case the amount of time _
I elapsing before the yarn is eventually returned i
to its correct running position will be very small. f
nance of a constant twist being imparted to the
The exact form of the yarn-lifting projections '
yarn, so that, as long as the condition 'exists
or abutments may be varied within the limits of
wherein the yarn is so displaced beyond the end
reason; and, in Figure 2, I have shown the ends
of the roll, a hard twist will result Where the
of the roll as being slotted at l9 in a segmental
rolls and twisting mechanism ‘are proportioned
and intended to produce a, soft twist. If this 10 manner leaving a diametralrib 21B’ thereon pro
viding lateral abutment surfaces 21,’ and oper
slippage of the yarn from over the end of the
ating in the manner of the abutment surfaces
roll is not noticed and immediately corrected and ~ '
the incorrectly twisted yarn thus permitted to
. 1.8 of the projections I6 previously described. The
ends of the said diametral ribs 20 will thus nat
wind to any extent on the bobbin, thread of an
I uneven and inferior quality is the result.
> urally be vav continuation of the peripheral surface
.of the. roll.
By my invention I automatically correct such
‘This invention maybe develop-ed within the
scope ‘of the following claims without departing
from the essential features of the said inven
displacement of the yarn by providing on the;
ends of the roll ll projections I6 which‘ I prefer.
to make of arcuate form, as shown in Figure 1,
with theirouter surfaces [1 being a ‘continua
tion of the surface of the roll, the ends vof the
said projection I 6 being in the form of abutments
"l8 extending more or less along chords of the
‘ends of the roll. Thus the said abutments N3 of
each projection l6 v‘are in materially spaced rela
tion on opposite sides ‘of a radial planepassing
‘trough the abutment and the center'of'the
" ‘The‘s‘erolls revolve 'quite rapidly and it will be
‘readily ‘apparent from an examination of Figure to
tion, and it is desired that the speci?cation and
drawing be read as being merely illustrative of a
practical embodiment of the said ‘invention'and
not in a strictly limiting sense. '
WhatI claim is:"
1. In a twister roll‘ of'the type described, pro-V
jections extending endwise beyond the "normal
‘length of the‘roll, part of the surface of ‘such. pro
jections being a continuity ‘of, the peripheral ‘sur
face of the rolL'and thejspacing between said
projections being uninterrupted ‘by the .roll
'4 that if yarn‘ should slip vover an end of the roll
2. In a twister roll of the type ‘described, pro-. .
it, as indicated in dotted lines of the said Figure
jections extending endwise' beyond the normal
‘4, it will be caught and held by one of the abut
length of said roll, ‘said projections having lat
ine'nt surfaces 18 ‘of one of the projections [6 in
eral abutment surfaces arcuately extending ma
such manner that, as the roll continues to rotate 135 terially ‘on either side of a radial plane passing
theabutme‘nt surface I8 of the other projection
through the center of the projection andthe cen
on that end of the roll "will ‘engage beneath the I ' ter of the roll, and the spacing between said pro
upper "extended length of ‘yarn whereby the con
jections being uninterrupted by the roll proper.
tinued movement 'of this projection I 6 will lift
3. Ina twister roll of the type described, pro
the yarn back to the position shownv in full lines 740 jections eXtendlng endwise beyond the normal
at the'top of the vsai'ol' Figure 4.
length of the roll, the outer part of the ‘surface
The outer surface of the said projection I6
of such projections being arcuate and a ‘continu
is a continuation of the general peripheral sur
ity of the peripheral surface of the roll, and the
face of the roll so that it‘thereby encouragesthe
spacing between said projections being ‘uninter
‘yarn .to resume its correct position running over
'rupted by the roll vproper.
the surface 'of?th’e roll. The winding motion of
described, pro
the yarn'on ‘the roll ‘is such that'its tendency to
jections extending endwise beyond the normal
feed beyond the limits of the roll length is more
length of said roll, said projections having lat
or less‘momentary whereby this‘ quick lifting of
eral abutment surfaces materially and uninter
the-yarn back to the periphery of the roll will
ruptedly spaced on either side of a radial plane
usually su?ice‘ to immediately return'it to the
- =In ‘relatively rare cases, where the yarn does
passing through the'center of the projection and
the center of the roll, the outer part ‘of the sur
face ‘of such projections ‘being arcuate and ‘a
not ‘immediately return to its ‘correct running
continuity of the peripheral surface of‘the roll. '
position, it will again and again in rapid succes
sionbe ‘subjected to the same lifting action by 55
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