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Патент USA US3071855

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Jan. 8, 1963
c. R. MARSHALL
3,071,839
METHOD AND MEANS FOR CATCHING SLUBS IN MOVING TEXTILE STRANDS
Filed May 29, 1959
4 Sheets-Sheet 1
INVENTOR:
CHAEUE R. MAR$HALL
j “5012mm wjwiwzgk
ATTORNEY 5 ,
Jan. 8, 1963
'
c.'R. MARSHALL
3,071,839
METHOD AND MEANS FOR CATCHING SLUBS IN MOVING TEXTILE STRANDS
Filed May 29, 1959
4 Sheets-Sheet 2
INVENTOR.‘
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CHAreuE R. MARSHALL
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ATTORNEYS
Jan. 8, 1963
C. R. MARSHALL
‘ 3,071,839
METHOD AND MEANS FOR CATCHING SLUBS IN MOVING TEXTILE STRANDS
Filed May 29, 1959
4 Sheets-‘Sheet 5
ll '10
INVENTOR:
CHABUE- R. MARSHALL
BY5M,MAM
ATTORNEY5 v
Jan. 8, 1963
c. R. MARSHALL
3,071,839
METHOD AND MEANS FOR CATCHING SLUBS IN MOVING TEXTILE STRANDS
Filed May 29, 1959
..
50.
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4 Sheets-Sheet 4
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INVENTOR
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‘CHARLIE R. MAQSHALL
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ATTORNEYS
United States Patent 0
1C6
3,071,839
Patented Jan. 8, 1963
1
2
3,071,839
zone in the form of an inclined slotted member, de?ect
ing a portion of the thread outwardly of its normal path
by causing a slub to ride upwardly or outwardly in en
gagement with and then over the top or outer edge of the
METHOD AND MEANS FOR CATCHING SLUBS
IN MQVENG TEXTHLE STRANDS
Charlie R. Marshall, 515 N. 5th St, Alhernarle, N.C.
Filed May 29, 1959, Ser. No. 816,960
21 Claims. (61. 28-~64i)
This invention relates to an improved method and
means for detecting defects, such as ‘slubs and the like
in moving textile strands or threads ‘and parting such
threads upon such defects being detected.
Many different types of devices have been made here
tofore for detecting defects in threads in the course of
their movement from bobbins, or other carriers, to cones,
spools, tubes and the like on a winding machine. Such
prior devices have included closely spaced plates forming
a slot therebetween through which the thread moved, or
they have included so-called combs forming slots through
inclined slotted member, then passing the slub through an
open area or free air zone, and then passing the slub
through a second restricted zone in the form of a second
inclined slotted member while pressing the slub against
the second member and thereby arresting the slub to
such extent, under the tension of the thread, \as to part
the thread. Thus, since the thread is bowed out of its
normal path of travel, movement of the slub against the
?rst slotted member carries upwardly with it lint or other
light material which may have tended to collect on the
?rst slotted member, which lint is then permitted to fall
between the proximal portions of the two slotted mem
bers prior to or substantially as the slub engages the sec
ond slotted member to arrest the slub and part the thread.
which the thread has passed. The width of such slots has
It is another object of this invention to provide a slub
been such that defects exceeding a certain diameter would
catching apparatus comprising a ?rst composite slotted
not pass therethrough, the thread thus being stopped and
member formed of a pair of relatively adjustable plates
eventually broken if it is stretched further.
which are inclined upwardly and forwardly or extend at
Due to the build-up of lint and other foreign matter
an angle with respect vto the path ‘of travel of the textile
at the ingress sides of such prior art combs and plates,
strand between two guide eyes, and through which slotted
it has been necessary to provide slots of su?icient width 25 member the strand passes. The inclination of the ?rst
so that a relatively large percentage of small or tapered
slotted member and its height above ‘the normal path of
slubs would not be detected and interrupted thereby.
travel of the strand is such that a slub in the strand,
Even then, the width of such slots was such relative to
detected by the ?rst slotted member, will hide upwardly
the thread that considerable amounts of lint would ac~
against the upper or front face of the ?rst slotted member
cumulate on the combs or plates de?ning such slots, to 30 and pass over the upper edge thereof.
such extent as to cause “skinning” of the thread or strand
A second slotted member, having its lower portion
being processed. This has resulted in a great many un
positioned closely adjacent, but in substantially horizon
necessary breaks in the strands being processed.
tally spaced relation to, the upper end of the ?rst slotted
The term “skinning” is well ‘accepted in the art as de
member, is so positioned as to be disposed in the path of
?ning ‘an excessive accumulation of lint and/or other 35 travel of the strand with the slub therein once it has been
light foreign matter on a moving thread entering the slot
raised or bowed by movement of the slub against the
of a slub catcher, and wherein the accumulation is drawn
into the slot with the moving strand to such extent as
to grip the strand and cause either an undesirable increase
front or upper face of the ?rst slotted member.
Accord
ingly, any dust, lint or other light foreign matter picked
up by the slub as it passes in engagement with the ?rst
in tension in the moving strand or to actually cause the 40 slotted member passes downwardly, by gravity, between
strand to break.
the proximal ends of the two slotted members and, there
It quite often happens that the thread is placed under
after, the slub engages the plates or upper front face of
increased tension by “skinning” while a relatively great
the second slotted member to place-the yarn under suf
length of the thread is wound and this frequently re
?cient tension to break the same.
quires that the thread be rewound, since the increased
It is thus seen that, since the lint and other light foreign
tension in the thread caused by “skinning,” produces an
inferior yarn package from which the thread cannot be
readily withdrawn during subsequent processing. Actual
tests have shown that “skinning” the thread, when pass
ing the same through slub catchers of the type used here
tofore, has caused up to sixty-?ve percent of the actual
thread breakages or separations, the remaining thread
breakages being e?ected by the actual catching of slubs
or enlarged places in the thread being wound.
For many years, the speed of the movement of thread,
as it has been wound on conventional winding machines,
has been in the proximity of 550 yards per minute. More
matter cannot accumulate, to any material extent, on
either sets of the plates, the usual cause of unnecessary
breaks in a moving strand is practically eliminated. As
a matter of fact, it has been found that the proportion of
unnecessary breaks which occur with the present appara
tus is as little as ?ve percent; this being considered with
the fact that the slots in the plates may be relatively nar
rower than the slots of prior slub catching devices so that
approximately twice as many slubs are detected by the
55
present apparatus as compared to the number of slubs
detected by prior devices.
It is still another object of this invention to provide an
apparatus of the character last described in which a cutter
been increased so that the speed of the thread has been
increased from 550 yards per minute up to 800 and even 60 blade is positioned beneath or rearwardly of the second
slotted member so as to engage and sever any thread or
1400 yards per minute. This increase in the speed of
strand portions which are abnormally tensioned, by a slub
the thread through the slub catcher has greatly increased
engaging the upper or front face of the second slotted
the problem of accumulation of lint and other foreign mat
member, between the second slotted member and the suc
ter on the surfaces of the plates or combs de?ning‘ the
ceeding guide eye of the apparatus.
.
slots of the slub catcher and, accordingly, this increased
It is still another object of this invention to provide
speed has also increased the proportion of unnecessary
breaks in the strand passing through prior types of slub
an improved slub catcher including means for detecting
catchers.
the presence of and de?ecting upwardly or outwardly any
It is therefore an object of this invention to provide
enlarged places or slubs in a thread, with separate means
a novel method and means for detecting slubs and other’ 70 for entrapping any of such slubs, and with such entrap
enlargements in a moving textile strand or thread, which
ping means being in such spaced relation to said detecting
recently, however, the speed of winding machines has
comprises moving the strand through a ?rst restricted
means as to permit lint and foreign matter to fall from
3,071,839
A.
which comprises a block~like lateral body 21 provided
with a rearwardly projecting upright flange or wall 22
at one side thereof. Upright ?ange 22 is provided with
a standard 23 preferably formed integral therewith. A
3
the strand and slub in its course between the detecting
and entrapping means.
It is still another object of this invention to provide a
slub catcher of the character described in which the de
tecting means comprises a pair of closely spaced plates
de?ning a slot therebetween through which the moving
lateral rear end portion 24 of a threading guide rod 25,
which forms a portion of frame 26, is suitably secured to
the upper portion of standard 23, as by a set screw 23a
strand passes and wherein the upper or front face, at least,
of the detecting means is disposed at such an angle rela
tive to the normal path of travel of the thread or textile
(FIGURE 5).
yarn which has, heretofore, produced so-called “skinning”
wardly extending portion 26 which extends forwardly of
Said lateral portion ‘24 of guide rod 25 extends out
strand as to cause ?ne lint and other light material on the 10 wardly and is then bent to form a downwardly and for
body 21 and curves upwardly and laterally to form a
front lateral portion 27. Portion 27 is then bent down
wardly and in the form of a V-shaped portion 30. The
of the yarn, to be de?ected outwardly in a divergent man
ner from the yarn and from the portions of the plates
forming the de?ector to assist in preventing accumulations
of lint and the like on the upper front face of the detect
ing member.
15
V-shaped portion 30 protrudes downwardly and rear
wardly at an angle and has a thread guide plate 31 suit
ably secured to the lower surface thereof. Thread guide
plate 31 is provided with an open-top notch forming an
ingress thread eye 32 therein through which a thread,
Some of the objects of the invention having been stated,
other objects will appear as the description proceeds when
taken in connection with the accompanying drawings, in
20 yarn, or other textile strand 33 passes as it enters the
which
slub catcher.
FIGURES l and 2 are fragmentary schematic views
It will be noted that the V-shaped portion 30 of thread
showing successive stages in operation of one form of the
ing guide rod 25 is preferably disposed forwardly of, and
improved apparatus;
in off-set relation to the longitudinal axis of, frame 20
URES l and 2 showing a second form of the apparatus 25 and is also integral with a downwardly and rearwardly
projecting portion 34 of thread guiding rod 25. The fore
equipped with a cutting device or blade for cutting, rather
most end of portion 34 is suitably secured to body 21.
than breaking, the thread when it is momentarily placed
As thread 33 moves rearwardly, it passes through the
under abnormal tension by a slub or enlarged portion
ingress guide eye 32 and then passes through a tension
thereon engaging the second slotted member;
FIGURE 5 is a top plan view of the ?rst form of im 30 device broadly designated at 36, to be presently described.
Thread 33 then moves rearwardly from tension device 36
proved slub catcher for carrying out the method of the
through an intermediate ingress thread guide 37 which is
present invention;
provided with a slot to facilitate threading, and which
FIGURE 6 is a side elevation of the slub catcher shown
guide is preferably made from a ceramic or synthetic ma
in FIGURE 5;
FIGURE 7 is a rear or egress end elevation of the ?rst 35 terial, and is carried by a support 40. Support 40 is in
the ‘form of a plate projecting upwardly from and being
form of slub catcher looking at the right-hand side of
FIGURES 3 and 4 are views similar to respective FIG
FIGURE 6;
7
FIGURE 8 is a detailed top plan view of the second
form of the improved slub catcher’ of FIGURES 3 and 4
suitably secured to the front face of body 21. Thread
33 then normally passes upwardly and rearwardly, pref
erably at a slight angle relative to the normal attitude of
body 21, and through an egress guide eye 41 which is
provided
with a slot 42 therein to facilitate positioning
and a waxing device;
thread 33 therein.
FIGURE 9 is a side elevation of the slub catcher shown
Guide eye 41 is also preferably made from a ceramic
in FIGURE 8 with parts broken away;
or plastic material and is carried by a support member
FIGURE 10 is an elevation of the egress or rear end
of the second form of slub catcher looking at the right 45 or plate 43 whose upper portion is suitably secured to
said lateral portion 24 of threading guide rod 25. It
hand side of FIGURE 8;
will be noted that the end of support plate 43 at the left
FIGURE 11 is a front or ingress end elevation of the
hand side of the frame 20 (FIGURE 7) is rounded at its
second form of slub catcher, looking at the lefthand side
lower portion, as at 44, to facilitate passing the thread
of FIGURE 8, but showing parts of the thread tension
device moved out of operative position, to more clearly I 33 into the egress thread eye 41 when the thread is in
serted lbetween portions 26 and 34 of threading guide
illustrate those parts forwardly of the rod which supports
rod 25 in threading up the apparatus. Plate 40 is also
said tension device;
'
preferably substantially the same shape as plate 43.
FIGURE- 12 is an enlarged, partially exploded, iso
As the strand or thread 33 moves from intermediate
metric view looking in the direction of the arrow 12 in
FIGURE 9, and showing means for adjusting the position I i; guide eye 37 to egress guide eye 41, it normally passes
through a ?rst composite slotted member broadly desig
of the second slotted member or entrapping member rela
nated
at 45 de?ning a ?rst restricted zone or passageway
tive to the ?rst slotted member or detecting member;
A. The thread 33 then normally passes beneath or to
FIGURE 13 is an enlarged partially exploded isometric
one side of a second composite slotted member, broadly
view showing, in particular, the means for relatively ad
designated at 46, de?ning a second restricted zone or
justing the plates of the slotted detector.
passageway B. The ?rst slotted member 45 may be
Referring more speci?cally to the drawings, the novel
termed as a defect detecting and/or de?ecting element,
slub catcher for carrying out the improved method of the
and the second composite slotted member 46 may be
present invention is illustrated in two similar forms, the
termed as a slub catching or defect entrapping element.
?rst form being shown in FIGURES l, 2, 5, 6 and 7 and
These composite slotted elements 45, 46 are peculiar to
the second form being shown in FIGURES 3, 4 and 8-13.
the present invention and will later be described in de
Both forms of the invention are substantially the same,
tail.
the second form being equipped with a thread cutter and
The tension device 36 may be of any desired construc
a waxing device for applying wax to the moving thread,
tion and is shown, in this instance, in the form of con
with corresponding structural elements for accommodat
ventional upper and lower bell washers 5t}, 51 between
ing the cutter and waxing device. The ?rst form of the
which the thread 33 moves. Lower bell Washer 51 rests
invention is not equipped with a cutter or a waxing de
upon a collar 52 suitably secured to an upstanding tension
vice, and will now be described in detail.
supporting rod 53 having a substantially horizontal lower
Referring now to FIGURES 5, 6 and 7 the ?rst form
portion suitably secured to the front face of body 21.
of slub catcher comprises a bracket or main frame broadly
designated at 20, which may be largely of cast metal and 75 Rod 53 projects upwardly ‘and preferably curves outward
and also showing the same equipped with a thread cutter
5
8,071,839
6
ly and then downwardly to provide a stem '54 on which
extra weight members, such as weight members 55, may
be positioned, it being well known that the weight mem- .
lbers determine the amount of tension applied to the
thread 33 as it passes through the slub catcher. The
free end of stem 54 is preferably provided with an en
larged portion or stop 56 which is shown in the form of a‘
pair of lock nuts in FIGURE 7.
The body 21 is provided with a projection or boss por
tion ‘6t? having an inclined upper surface, and ‘which pro 10
jects rearwardly therefrom, but terminates in substantial
ly spaced relation to, the rear end of the ?ange portion
22 of body 21. The upper portion of the projection 69
and in the direction of, the normal path of travel of the
thread 33 between guide eyes 37, 41.
As best shown in FIGURE 1, in the absence of a
defect in the thread 33, such as a slub or enlarged por
tion therein, the thread 33 moves rearwardly and up
wardly at a slight angle of approximately 10‘ degrees,
relative to the horizontal plane of frame 20, as it passes
from guide eye 37 to guide eye 41. It follows, therefore,
that, although the upper surfaces of de?ector plates 61,
62 are disposed at an angle of 35 to 45 degrees relative
to the horizontal plane of frame 29, as set forth hereto
‘fore, since the thread 33 moves at an angle of 10 degrees
relative to the horizontal plane of frame 20, the de?ector
plates 61, 62 of detector 45 are, thus, disposed at an
of body 21 is inclined, upwardly and rearwardly, at an
angle of from 35 degrees to 45 degrees, relative to the 15 angle of from 25 to 35 degrees, preferably 30 degrees,
horizontal plane of the frame 20 and toward the direc
relative to the normal path of travel of thread 33 through
tion of movement of the thread 33 for supporting the
slot A. Also, plates 70, 71 of entrapping element or
?rst composite slotted member 45, at the same angle. An
second composite member 46 are, thus, disposed at an
angle of 40 degrees has been found most ef?cient for the
angle of 15 to 25 degrees relative to the normal path of
upper surfaces of plates 61, ‘62 forming said ?rst com 20 travel of thread 33 or, preferably, at an angle of 20
posite member 45. The thread 33 normally passes
degrees.
through a slot A formed by the pair of closely spaced,
The entrapping plates 70‘, 71 are secured for relative
opposed, de?ector plates 61, 62. The proximal portions
adjustment on an angularly disposed slotted or bifurcated
of plates 61, 62 overlie a slot 63 formed in the upper ‘
portion 74 of a substantially Z-shaped trap supporting
portion of projection 60 of body 21. De?ector plates 61, 25 bracket 75 by means of respective pairs of screws 76,
62 are suitably secured in respective recesses 64, 65
77. The entrapping plates 76, 71 may be relatively ad
formed in the inclined upper portion of projection 60‘ of
justable on the angular portion 74 of bracket 75 in the
body 21, as by the respective screws 66, 67. The de?ec
same manner as that which will be later described with
tor plates 61, 62 may be mounted in the same manner as
respect to the entrapping plates 70’, 71' of the second
the de?ector plates 61', 62' of the second form of the in 30 form of the invention (FIGURE 13).
vention (FIGURE 13), as will be later described.
The Z-shaped bracket 75 also includes a substantially
The second composite slotted member or entrapping
horizontal lower portion 81. The substantially horizon
element 46 also comprises a pair of opposed relatively
tal lower portion 81 of bracket 75 is loosely positioned
thin upwardly and rearwardly inclined plates ‘70, 71 which
in a slot 82 provided in the lower portion of projection
are spaced apart from each other at, at least, the lower
61) of body 21, the bracket 75 being locked in the de
portions thereof. In this instance, the proximal edges of
sired adjusted position by means of a set screw 83 thread
the plates 70, 71 extend upwardly and rearwardly in con
ed through the lower portion of projection 60 and bear
verging relation-ship, the distance between their lower
ing against the lower surface of portion 81 of bracket
front portions being su?icient to form a slot B through
75. In order to adjust the displacement between upper
which the thread 33 may freely pass.
40 portions of de?ector plates ‘61, 62 and the lower portions
However, it will be noted in FIGURES 1 and 6 that
of entrapping plates 70, 71, a shouldered adjustment
the lower front edges of ‘entrapping plates 70, 71 are
screw 84 is provided which loosely penetrates the vertical
disposed above the plane of the normal path of travel of
portion 841 of bracket 75 and is threaded into the rear
thread 33 between guide eyes 37, 41. The front, upper
‘wall of projection 60 of body 21.
surfaces of entrapping‘plates 70, 71 ‘are also inclined
Screw 84 has an enlarged annular portion or abutment
upwardly and rearwardly, preferably at a more shallow
85 suitably secured thereto and engaging the front sur
face of portion 80 of bracket 75 so that outward adjust
angle than the front upper faces of the de?ector plates 61,
62. It has been found desirable to position the front
ment of screw 84 will cause annular portion 85 to move
braket 75 rearwardly, assuming that set screw 83 is then
,upper faces of entrapping plates 70, 71 at an angle sub
stantially ten degrees less than the angle of the front
upper faces of de?ector plates 61, 62. In other words,
the front upper surfaces of entrapping plates 70, 71 are
loosened. (See portion 85’ of second form of the in
vention in FIGURE 13.) Inward adjustment of screw
disposed at an angle of from 25 to 35 degrees relative to
the normal horizontal plane of body 21 and frame 20.
It should also be noted that the lower end portions
of entrapping plates 70, 71 of the second composite
slotted member 46 are spaced rearwardly from the upper
portions of the deflector plates 61, 62 of the ?rst com
posite slotted member 45, to permit lint and other light
material to pass downwardly, by gravity, between the
proximal portions of the ?rst and second composite
slotted members 45, 46, as will be more fully described
hereinafter.
Although the angular atitudes of the upper front sur
faces of the ?rst and second composite slotted members
45 and 46 have been given with respect to the normal
horizontal plane of frame 20, these angular attitudes are
forwardly. It follows that set screw 83 is tightened after
screw 84 is adjusted in either direction to lock bracket
84, with set screw 83 loosened, will move bracket 75
75 in the desired adjusted position.
The displacement between the ?rst and second com
posite slotted members 4-5, 46' may vary, according to the
character and size of thread being processed, from one
sixteenth of an inch to one-fourth inch, more or less.
Also, the width of slots A, B ‘between plates ‘61, 62 and
70, 71 respectively, may vary depending upon the size of
the thread to be processed. By way of example, in wind
ing or processing from 24 count to 40 count cotton yarn,
the slot A between de?ector plates ‘61, 62 is normally ap
proximately .008 of an inch and the width of slot B be
tween the lower edges of portions of entrapping plates
70, 71 may be approximately .009 of an inch when the
proximal edges of plates 70, 71 extend in converging re
desirable only because they facilitate the gravitational
movement of lint and other light material off of the upper
surfaces of de?ector plates ‘61, 62 and entrapping plates
70, 71. More important, however, is the angular atti
tude of the de?ector and entrapping plates with respect to
the normal path of travel of the thread 33. In essence,
70
lation, as shown in FIGURE 5.
‘In practice, it has been found favorable to provide
slot A and the lower portion of slot B of such Width
that the thread of normal diameter will pass through
the respective slots and will be snugly engaged by the
respective sets of plates 61, 62 and 70, 71 without plac
the plates 61, 62, 70, 71 are disposed at acute angles to, 75 ing the thread 33 under excess tension as it is drawn
3,071,839
55
through the slub catcher. The angularity of the de?ect
ing plates v61, 62 of the combination detector and de
?ector 45 causes many of the extremely ?ne ?bers, which
are wiped from the thread 33 by the proximal edges of
plates 61, 62, to strike the front faces of plates 61, 62
and fly upwardly and outwardly and, thus, away from
the slot A. This condition is further induced by the
movement of the yarn itself since the moving thread pro
removed from the thread being processed or wound, the
higher the quality of the yarn or thread. The capacity
of prior devices for removing a great many slubs from
yarn or thread has been severely limited due to the fact
that, if the slots through which the yarn passed in the
slub catcher were made sufficiently small to remove a
substantial number of slubs which would normally pass
through the slots, the skinning of the thread was consider
ably increased. Consequently, the additional number of
duces a light movement of air with consequent turbu
lence at the front faces of de?ector plates ‘61. 62.
10 knots increases the labor necessary to produce a certain
poundage of yarn and also reduces the rate of production
Since the accumulation of lint on the front faces of .
which would not actually result in a higher quality of
the plates or combs de?ning slots, through which threads
yarn.
passed in prior slub catchers, was the most prevalent fac
it is apparent from the foregoing description, that the
tor contributing to “skinning” of the yarn, it follows that
the angular relationship between the thread 33 and the 15 plates 61, 62 of the present invention may be adjusted
relatively closer together to form the slot A of much
front upper faces of plates 61, 62 of the ?rst composite
lesser width than could be practiced on prior types of
slotted member is, in itself, largely responsible for the
slub catchers, so that a proportionally larger number of
fact that the number of unnecessary breaks in the moving
slubs could be removed from a given length of thread,
strand is substantially reduced in the present method.
Now, it will be noted that the upper edges of de?ector 20 and the number of unnecessary breaks and consequent
knots would still be substantially less than is the case with
plates 61, 62 terminate a relatively short distance out
the prior types of slub catching devices, this being due to
wardly of or above the normal path of travel of thread
the fact that the cause of the unnecessary breaks is prac
33 through slot A (FIGURES 1 and 5). Also, the lower
tically eliminated with the present apparatus.
end portions of entrapping plates 70, 71 are disposed
It should be noted that the maximum width of the gap
within the plane of an imaginary line extending from the
or air space between the ?rst and second composite slot
upper edges of de?ector plates 61, 62 and the forward
ted members is limited by the speed of the thread passing
end of egress guide eye 41. This further insures that a
through the gap, the vertical distance from the upper
minimum amount of lint or other light material may
edges of deflector plates 61, 62 to the lower edges of en
collect upon the de?ector plates 61, 62 adjacent slot A,
trapping plates 70, 71, and the angle at which the thread
for the reason that, when a slub or enlarged portion, such
33 extends, with a slub therein, from the top edges of
as is indicated at S in FIGURES 1 and 2, occurs in the
plates 61, 62 to egress guide eye 41. It is preferable
moving thread 33, the proximity of the deflector plates
that the lower edges of plates 76, 71 be disposed slightly
61, 62 is such that slub S will engage the front faces of
belowv the level of the upper edges of plates 61, 62. How
plates 61, 62. Since the slub S cannot pass through slot
A, this bows upwardly a corresponding portion of thread 35 ever, it is only necessary that the de?ector plates 61, 62
and entrapping plates 70, 71 be relatively positioned so
33 as slub S rides upwardly in engagement with and over
portions of entrapping plates 70, 71 are within the plane
the top of deflector plates 61, 62. Slub S carries with it
of an imaginary line extending from the outer edges of
any lint which may have tended to adhere to the front
plates 61, 62 to the egress guide eye 41. Accordingly, the
surfaces of de?ector plates 61, 62 adjacent slot A.
lower edges of plates 7%}, 71 may be located above or a
Thus, as slub S is de?ected above and slightly beyond
substantial distance below the level of the upper edges of
the restricted passageway A de?ned by the uppermost
plates 61, 62, provided that these sets of plates are pro
front edges of plates 61, 62, the slub moves into an open
vided with said gap therebetween. However, it is desir
area, air space or zone so that most of the lint, if not‘ all
able that plates 79, 71 terminate above the level of the
the lint carried upward by the slub S falls in this air space
between the proximal portions of the ?rst and second , normal path of travel of thread 33 to avoid “skinning” of
the thread by plates 70, 71.
composite slotted members 45, 46. Thereupon, the de
Best results are obtained by the arrangement of plates
?ected thread portion enters the second restricted passage
61, 62, 7t}, 71 and guide eyes 37, 41 in the manner de
way B so slub S engages the front faces of the lower por
scribed. However, it is within the scope of the invention
tions of entrapping plates 7 0, 71. The more tension
to arrange said plates 61, 62, 78, 71 in horizontal or other
placed on the yarn or thread 33 by the means pulling the .
relation to the normal path of the thread; that is, en
same, the further upwardly will be the tendency for the
trapping plates 70, 71 may be disposed to one side of,
slub S to move against the upper front faces of entrapping
rather than above, the normal path of travel of the
plates 70, 71. However, before slub S will have caused
thread, as long as the de?ector plates 61, 62 and guides
the portion of thread 33 extending between entrapping
37, 41 still occupy the same positions relative to plates
member 46 and egress guide eye 41 to extend perpen
79, 71. Changing the plates 61, 62, 70, 71 to the latter
dicular to the entrapping plates 70, 71, slub S will have
postions may, however, reduce the e?iciency of de?ector
been entrapped or arrested and will thus have applied
sui?cient tension to the thread 33 to break the same sub
stantially as shown in FIGURE 2.
All of this happens very quickly so there is not any
material length of strand wound about a yarn package on
the corresponding winding machine. Accordingly, since
the “skinning” of the thread 33 is practically eliminated,
there are no exceptionally tight convolutions of thread on
the yarn package being wound so that rewinding of yarn
packages is also practically eliminated from this cause,
which was a common fault of prior devices.
Actual experiments have shown that the number of
unnecessary breaks in the thread due to skinning has been
reduced to approximately 5%. In other words, of the
actual breaks of the thread with movement thereof
through the improved slub catcher, approximately 95%
of them have resulted from the actual detection and catch
ing of slubs or enlarged portions in the thread.
It is apparent that the more slubs or enlarged portions
plates 61, 62 in casting off lint deposited thereagainst by
the thread moving in its normal path.
Second Embodiment of the Invention
As heretofore stated, the second form of the invention
is shown in FIGURES 3 and 4 and ‘L13 and differs from
the ?rst form of the invention in the fact that it is
~ equipped with the Waxing device and a cutting means for
severing the thread upon a slub or enlarged place being
detected therein, While in the ?rst form of the invention
the thread was parted solely by the increased or abnormal
tension placed in the yarn by engagement of the slub S
with the front, upper, surfaces of the entrapping plates
7%, '71 of the second slotted composite member 46. Ac
cordingly, where applicable, the parts of the second form
of the invention which are substantially the same as or
identical to, corresponding parts of the ?rst form of the
invention will bear the same reference characteristics with
3,071,839
the prime notation added, in order to avoid repetitive
it is apparent that blade 111 may be short enough so as
description.
to not be engaged by screws 76', 77’, in which instance,
It will be observed in FIGURES 8 and 9 that side wall
or ?ange 22’ is substantially longer than ?ange 22 in
entrapping plates 70’, 71’ will clamp blade 111 against
the upper surface of bifurcated portion 74’, or in the
FIGURE 6 so as to accommodate a waxing device or
attachment broadly designated at 89 between the slub
entrapping device or second composite slotted member
46’ and the rear lateral portion 24’ of the threading guide
rod 25’. Also, the rear end of the upwardly and rear
wardly inclined portion 74’ of bracket 75' has a down 10
recess 110, as the case may be.
In order to assist in accurately determining the width
of slots A, A’ when a thickness gauge is used by a person
adjusting one of the corresponding de?ector plates, the
sets of de?ector plates 61, 62 and 61', 62' in both forms
of the invention are preferably mounted in the manner
wardly projecting substantially vertical plate portion or
in which the de?ector plates 61', 62’ of the second form
wall portion 86 integral therewith in which the guide eye
of the invention are shown in FIGURE 13.
41' is positioned, guide eye 41’ being so positioned in
In FIGURE 13, it will be noted that the righthand de
order to correspond to and serve the same purpose as
?ector plate 61’ has a circular hole 113' therethrough
guide eye 41 of the ?rst form of the invention.
15 through which screw 66’ loosely extends to tightly secure
Accordingly, a guide-eye support plate 87 is suitably
de?ector plate 61' in ?xed position in recess 64’. How
secured to and depends from the rear lateral portion 24’
ever, in order to adjust de?ector plate 62’ relative to de
of threading guide rod 25' and has an auxiliary egress
?ector plate 61', de?ector plate 62' is provided with a
guide eye 90 mounted therein. The support 87 is of sub
longitudinally extending slot 114- which is loosely pene
stantially the same shape as support '43 of FIGURE 7, but 20 trated by screw 67'. The outer end of the de?ector plate
guide-eye 90 is horizontally elongated so as to permit
62’, opposite from slot A’ is engaged by a relatively light
oscillation of the strand or thread 33’, under the in?uence
spring 115, shown in the form of a torsion spring, and
of the usual traversing mechanism of a ‘winding machine,
which bears against the wall of the recess 65' remote from
as thread 33’ passes between guide eye 41' and guide eye
de?ector plate 61'. A shield plate 117 is also provided
90. Oscillation of thread 33’ between guide eyes 41',
with a circular hole 116 therethrough and is adapted to ?t
90 is desirable to insure that wax is collected on the thread
in recess 65’, upon the de?ector plate 62’ and over spring
33’ from a circular wax cake or disk 91 of the waxing
115, so as to prevent dirt and other light foreign matter
device 89.
from accumulating in that portion of recess 65' in which“
Wax cake ‘91 normally rests upon a disk or bell-shaped
spring 115 is located.
member 92. Disk 92, in turn, rests upon a ?ange 93 in 30
It is thus seen that there is eliminated the uncertainty
tegral with a hollow core or stob 95 on which the wax
of manual pressure being applied to a thickness gauge by
cake 91 is loosely mounted. Hollow core 95 is loosely
moving de?ector plate 62' toward de?ector plate 61', when
mounted on the upper end of a post 96, which post also
a thickness gauge is positioned therebetween, since spring
loosely penetrates ?ange 93 and has a suitable support
115 applies, at all times when screw 67' may be loose,
collar 97 ?xed thereon for supporting ?ange 93. The 35 such pressure as may be required in order to position the
lower end of post 96 is ?xed in an arm 100 as by a screw
edge of de?ector plate 62;’ against a thickness gauge resting
101. Arm 100 is suitably secured to or formed integral
against the corresponding edge of de?ector plate 61'.
with side wall or ?ange 2250f frame 20’.
When de?ector plate 62’ has beeen adjusted against a
In the second form of the invention, it will be observed
thickness gauge, screw 67’ is then tightened in‘projection
4-0
in FIGURE 8 that the entrapping plates 70’, 71' of the
6t} and secures shield plate 117 against de?ector plate 62'
second slotted composite member 46', extend in parallel
and, thus, clamps de?ector plate 62' in the adjusted posi
tion against the bottom of recess 65'. Thereafter, the
relationship where they form the slot B’. This is a matter
of choice, since plate 71' may be adjusted to either extend
at an angle to plate 70’ or to extend parallel to plate 70'.
thickness gauge may be removed and the slub catcher is
then ready for operation.
A detailed description of the structure shown in FIG
To explain further, reference is made to FIGURE 13
wherein it will be observed that screws 76’ loosely extend
URE 12 is deemed unnecessary, since the elements shown
in FIGURE 12 have already been described with reference
70’. The screws 76' are threaded into angular portion
to FIGURES 8 and 9. It will be noted, however, that
741’ of bracket 75’.
those parts of the second form of the invention shown in
On the other hand, the other entrapping plate 71' is 50 FIGURE 12 more clearly illustrate corresponding parts
provided with laterally elongated slots 106 for loosely
heretofore described with respect to the ?rst form of the
receiving the respective screws 77', the later screws 77’
invention, but whose reference characters bear the prime
also being threaded into inclined portion 74' of bracket
notation in FIGURE 12.
75". Thus, with entrapping plate 70' tightly secured on
The second form of the invention operates, as shown in
the bifurcated portion 74' of trap support 75', screws 55 FIGURES‘ 3 and 4, to detect, de?ect and entrap enlarged
77’ may be loosened and a thickness gauge placed be
portions or slubs S’ in the moving thread 33', in the same
tween the proximal edges or surfaces of entrapping plates
manner as that described with respect to enlarged places
70’, 71’. Thereupon, plate 71’ is moved against said
or slubs S in the thread 33 shown in association with the
thickness gauge and screws 77' are then tightened.
?rst form of the invention in FIGURES 1 and 2. The
In order to sever or out thread 33’ when an enlarged 60 only diiference in the second form of the invention as
portion or slub S’ (FIGURES 3 and 4) impinges against
compared with the ?rst form of the invention is that the
the front upper faces of entrapping plates 70', 71', a ?xed
entrapment of slub S’ by entrapping plates 70, 71’ of the
cutting blade may be provided at any point between plates
second slotted composite member 46’, causes the portion
79’, 71' and egress guide eye 41’, just so long as it may
of the strandbetween the slub and the egress guide eye
then be engaged by the thread 33' extending from the en 65 41' to engage and be severed by the cutting blade 111.
trapping element 46' to guide eye 41'. In this instance,
Of course, the second form of the invention also includes
it will be observed in FIGURE 13 that bifurcated portion
the waxing device 89 in which cake or disk 91 applies wax
74’ of trap support 75’ is recessed at‘llt) to accommodate ‘
to the moving thread 33' as the thread is oscillated, by
a cutting blade 111 which extends across slot 112 formed
the usual traversing attachment of a winding machine, to
in the bifurcated portion 74'. Recess 110 may or may 70 move to and fro between the wax disk or cake 91 and the
not be provided, depending upon the thickness of blade
plate 92.
111.
It is thus seen that I have provided a novel structure
Blade 111 is shown as being of sufficient length to be
and method for detecting slubs or enlarged places in a
penetrated by respective uppermost screws 76', 77' in
moving thread or textile strand and wherein detection of
through respective circular holes 105 in entrapping plate
order to secure blade 111 in the recess 110.
However,
75
the slub removes lint and the like which may have col
3,071,839
11
lected on the detecting or de?ecting means and Where
upon such lint and the like falls‘ between the de?ecting
means and the entrapping means; Thereafter, the entrap
ping means entraps the‘ slub‘ to place the strand under suf
ficient tension to break the same or to cause severance
1‘2
extends through the second slot‘ and'the slub is entrapped
by the second member to part the thread.
5. A structure according to claim 4 in which said out
wardly facing surface of the ?rst member extends at an
angle of twenty-?ve to thirty-?ve degrees relative to said
path and direction.
of the strand at a point closely adjacent to and subsequent
6. A structure according to claim 4 wherein the inner
to the entrapping means. As heretofore stated, this
most edge or" the outwardly facing surface of the second
greatly reduces the number of unnecessary breaks in the
member is spaced outwardly of the normal path of travel
yarn and consequently reduces the number of unnecces
sary stops of the particular winding head of the machine. 10 of the thread.
7. A structure according to claim 4 wherein said out
Also, a substantially greater number of slubs may be re
wardly facing surface of the second member is disposed at
moved from a given length of thread than has heretofore
an angle which is approximately ten degrees less than the
been possible with other types of slub catching methods
angle at which the outwardly facing‘ surface of the ?rst
and structures, due to the fact that the slots through which
the strands pass may be substantially narrower than has 15 member is disposed relative to' the path and direction of
the thread.
herefore been possible, because of the fact that the reason
8. A slub catcher for a moving thread comprising a
for limiting the extent as to how closely adjacent plates
pair of ?xed guides for guiding said thread in a given path
de?ning said slots could be positioned has been virtually
therebetween, a ?rst and a second slotted member each
eliminated by the present method and apparatus.
In the drawings and speci?cation there have been set 20 extending at an acute angle relative to and in the direc
tion of said given path, said ?rst slotted member extend
forth preferred embodiments of the invention and, al
ing' outwardly with respect to‘ said given path so the oc
though speci?c terms are employed, they are used in a
currence of a slub in the thread causes the slub to ride
generic and descriptive sense only and not for purposes of
against the outer surface of the ?rst slotted member rela
limitation, the scope of the invention being de?ned in
25 tive to said given path and also causes the slub to ride over
the claims.
the outermost end of said ?rst slotted member, said second
I claim:
slotted member being spaced from said outermost end of
4 1. A method of controlling textile thread and catching
the ?rst slotted member with respect to the direction of
slubs and other enlarged places in the thread which com
movement of said thread and having its inner end posi
prises pulling the thread in a normal path through a ?rst‘
restricted zone, de?ecting a portion of the thread out 30 tioned out of the normal path of said thread but within
the path of said thread when de?ected outwardly by the
wardly and away from the ?rst restricted zone at an angle
?rst slotted member, and the slot in the second slotted
acute to the normal path of travel of the thread upon 00
member being of such width as to arrest and entrap said
currence of a slub therein, then drawing the de?ected por
slub whereby the thread thus tensioned is parted.
tion through an open air space and through a second re
9. A structure according to claim 8 including means
stricted zone at an angle acute to the normal path of travel 35
for cutting said thread upon entrapment of a slub by said
second slotted member.
10. A slub catcher for a moving thread comprising a
2. A method of catching slubs and other enlarged de
frame, a pair of spaced thread guide means mounted on
fects in a textile thread which comprises pulling the thread
in a normal straight path through a ?rst restricted zone, 40 said frame for passage of thread therebetween, a ?rst
of the thread, and then arresting said slub at said second
zone to part the thread.
de?ecting outwardly a portion of the thread, away from
member having an elongated slit therein, said member
said zone at an angle acute to the normal path of travel
of the thread, upon occurrence of a slub therein, then
successively drawing the de?ected portion through an open
being mounted on said frame between said guide means
and having its outer surface positioned at an acute angle
with respect to the direction of travel of the thread, the
zone and through an entrapping zone at an angle acute to ‘
slot being of substantially uniform width such that thread
the normal path of travel of the thread, arresting said
of a given diameter will pass therethrough and a slub on
the thread will engage the outer surface of said ?rst mem
ber to de?ect outwardly the thread and cause the slub to
slub at the entrapping zone, and cutting the thread.
3. In a slub catcher having spaced ingress and egress
thread guiding means for guiding thread in a given path
and direction; the combination of successive ?rst and sec
ond slotted members each extending at an acute angle rela
tive to the given path and direction of movement of the
strand, the ?rst member being in said path, the second
pass outwardly of the outermost edge of the ?rst member,
a second slotted member spaced subsequent to the ?rst
slotted member and also extending at an acute angle with
respect to the path of travel of the thread, the second
slotted member extending outwardly to such extent that
the thread cannot pass beyond the same whereby the
member being spaced to one side of said path but within
the plane of an imaginary line between the outermost end 55 second slotted member arrests movement of the slub and
places the strand under abnormal tension to break the
of the ?rst member and the egress thread guiding means,
and proximal portions of said members being spaced
apart.
same.
11. A slub catcher for thread comprising a frame, ?rst
and second spaced thread guide means mounted on said
4. in a slub catcher having spaced ingress and egress
guide means for guiding a moving textile thread in a 60 frame for movement of thread therebetween, a ?rst mem
ber having ‘a front upper surface thereon and a slot therein
normal path and direction, ?rst and second members dis
extending at an acute angle with respect to the direction
posed between said guide means and being serially spaced
of travel of the thread and through the lower portion of
relative to the direction of movement of the thread and
having outwardly facing surfaces thereon de?ning respec
which said thread passes in its normal path of travel be
tive ?rst and second slots therethrough, said slots being of 65 tween said ?rst and second guide means, a second slotted
member having an upper face extending at an acute angle
substantially the same size as the width of the thread,
said surfaces each extending at an acute angle with respect
with respect to the direction of travel of the thread, the
to said normal path and direction, the outermost edge of
lower edge of the second member being spaced above the
at least that portion of the outwardly facing surface de?n 70 normal path of travel of the thread and being within the
path of tra 'el of the thread when the thread is de?ected
ing said ?rst slot being so disposed that occurrence of a
upwardly by engagement of a slub with the front surface
slub in the thread de?ects the thread outwardly so the slub
of the ?rst member whereby the slub passes over the up
moves against and past said outermost edge, and said
perrnost edge of the ?rst member and, as the thread is thus
outwardly facing surface of the second member being
moved into the slot of the second slotted member, the
disposed in the plane of the de?ected thread so the thread
3,071,839
13
14
slub moves into engagement with the second slotted mem
detection of such defects, said method comprising guiding
ber and is thereby arrested to part the thread.
12. A structure according to claim 11 in which the
front surface of said ?rst member is disposed at an angle
of from 25 to 35 degrees with respect to the direction and
the thread in a normal path of travel through a ?rst slotted
member and then adjacent a second slotted member spaced
to one side of the normal path of travel of the thread,
interrupting and de?ecting a portion of the thread out of
its normal path of travel at an angle acute thereto and
entirely out of the ?rst slotted member upon occurrence
of a slub therein, then moving the portion of the thread
normal path of travel of the thread.
13. A structure according to claim 11 in which the
upper face of the second slotted member is disposed at an
acute angle of from 15 to 25 degrees with respect to the
so de?ected into the second slotted member at an angle
direction and normal path of travel of the thread.
10 acute to the normal path of travel of the thread while
14. A structure according to claim 11 in which the ?rst
causing the slub to slide along an inclined path de?ned by
slotted member is disposed at an angle of approximately
the second slotted member, and then parting the thread.
30 degrees with respect to the path of travel of and di
' ‘20. A method of detecting slubs and other enlargements
rection of movement of the thread, and the upper face
in a moving textile thread comprising pulling the thread
of said second slotted member is disposed at an angle of 15 in a normal path of travel through a ?rst slit and then
approximately 10 degrees less than the angle of the front
adjacent to a second slit spaced to one side of the normal
upper surface of the ?rst member.
‘
path of travel of the thread, sensing the presence of a
15. A structure according to claim 11 including cutting
slub in the thread and then de?ecting the thread out of
means positioned between said second slotted member
its normal path of travel at an angle acute thereto and
and the succeeding second guide means and wherein the 20 out of the ?rst slit while causing the slu-b to wipe ad
cutting means is engageable by the thread after said thread
jacent surfaces de?ning the ?rst slit, moving the de?ected
has been de?ected outwardly by the ?rst member.
thread and slub through an open air space and into the
16. A structure according ot claim 15 in which said
con?nes of the second slit at an angle acute to the normal
cutting means is in the form of a relatively thin blade'
path of travel of the thread and then guiding the de?ected
having its cutting edge facing toward the lower end of 25 slub along an inclined path adjacent the second slit while
said second slotted member.
,
restraining the slub ‘from passage through the second slit,
17. A method of detecting slubs and other enlarge
and then parting the thread.
ments in a moving textile thread and parting the thread
21. A method of detecting slubs and other enlargements
upon detection of such defects, said method comprising
in a moving textile thread comprising pulling the thread in
guiding said thread in a normal straight path of travel 30 a normal path of travel through a ?rst slit and adjacent
through a slotted member, interrupting and de?ecting a
to a second slit spaced to one side of the normal path of
portion of the thread out of said normal path of travel at
travel of the thread, sensing the presence of a slub in the
an angle acute thereto and entirely out of the slotted mem
thread and then de?ecting the thread out of its normal
ber upon occurrence of a slub therein, then moving the
path of travel at an angle acute thereto while causing the
portion of thread so de?ected through an independent 35 slub to wipe the surfaces de?ning the ?rst slit, moving the
entrapping zone at an acute angle to the normal path of
de?ected thread into the con?nes of the second slit while
travel while said portion of thread remains de?ected, and
moving the slub and adjacent portions of the de?ected
then parting the thread.
thread out of the ?rst slit, then moving the slub through an
18. A method of detecting slubs and other enlargements
open air space and into the second slit at an angle acute
in a moving textile thread and parting the thread upon 40 to the normal path of travel of the thread and then re
detection of such defects, said method comprising guiding
straining the slub from passage through the second slit,
said thread in a normal straight path of travel through
while guiding the slub along an inclined path relative to
a slotted member, interrupting and de?ecting a portion
the normal path of travel of the thread, and then parting
of the thread out of said normal path of travel at an
acute angle and entirely out of the slotted member upon 45
occurrence of a slub therein at said slotted member, then
moving the slub of the de?ected thread along an inclined '
path de?ned by an independent entrapping zone while
moving the de?ected thread through the entrapping zone
at an acute angle to the normal path of travel, and then 50
parting the thread.
19. A method of detecting slubs and other enlargements
in a moving textile thread and parting the thread upon
the thread.
-
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,434,091
2,522,751
2,563,814
Arrington ______________ __ Jan. 6, ‘1948
Doll _________________ __ Sept. 19, 1950
Brink ________________ __ Aug. 14, 195-1
2,700,2042,746,120
2,929, 129
Doll _________________ __ J an. 25, 1955
Moos _______________ __ May 22, 1956
Abbott ______________ __ Mar. 22, 1960
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