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Патент USA US2121739

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June 21, 1938-.
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H_ JANSSEN
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2,12L739
THREAD TENSIONING DEVICE FOR BRAIDING MACHINES AND THE LIKE
Filed July 27,1935
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ATTORNEY.
Patented June 21, 1938
2,121,739
UNITED STATES
PATENT OFFICE
2,121,739
THREAD TENSIONING DEVICE FOR BRA‘ID
ING MACHINES AND‘ THE LIKE
Henry Janssen, Wyomissing, Pa., assignor to
Textile Machine Works, Wyomissing, Pa., a.
corporation of Pennsylvania
Application July 27, 1935, Serial No. 33,530
11 Claims.
This invention relates to thread tensioning de
vices, and particularly to tensioning devices em
ployed in braiding machines and the like.
It is an object of the invention to provide a
5 thread tensioning device with a novel structure
for maintaining the thread fed therethrough at
a predetermined degree of tension.
Another object of the invention is to provide
a combined thread guide and tensioning device
in which the degree of tension may be varied as
desired.
Still another object is to provide a composite
thread guide and tension member particularly
adapted for use in conjunction with the fabrica
tion of material in Which elastic thread is used.
A further object is to provide means for direct
ing yarn through a zigzag course to effect a mul
tiplicity of angular contact surfaces and means
for automatically varying the surfaces.
20
It is also an object of the invention to provide
means for varying the angle of the yarn as it
passes between relatively movable guides thereby
to automatically adjust the tension on the yarn.
Still another object is to render such device
25 simple and durable in construction, economical
to manufacture and effective in its operation.
With these and othervobjects in view which
will become more readily apparent from the fol
lowing detailed 'description of the illustrative
30 embodiment of the invention shown in the ac
companying drawing, my invention resides in
the novel elements, features of construction and
arrangement of parts, as hereinafter more partic
ularly pointed out in the claims.
In the drawing:
Figure 1 is an elevation view of a portion of a
braiding machine, in which my invention is shown
in operative relationship;
Fig. 2 is an end view of a yarn guide constructed
40 in accordance with the present invention, certain
parts thereof shown in section to more clearly
illustrate the structure thereof;
Fig. 3 is a section view taken on line 3--3,
Fig. 1;
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Fig. 4 is a section view taken on line 4—4,
Fig. 1; and
Fig. 5 is a plan View of the invention shown
in Fig. 1.
This invention is adapted to braiding machines
50 and the like, wherein elastic thread is employed
while subjected to a predetermined degree of
tension. For purposes of setting forth the fea
tures of this device it is being illustrated and
described in connection with a braiding machine,
55 it being understood, however, that this will in
(CI. 96-43)
no way affect the status of the invention or limit
the scope of the claims.
Referring tov the drawing, reference numeral
l0 indicates a deck or top plate of a braiding
machine in which a sinuous raceway is formed
for guiding the operative course of a series of
carriers l2 in manner necessary to interengage
the threads and thereby fabricate the desired
product. The raceway for the carriers is formed
by quoits or tellers I4 and the top plate ill in
the usual manner. The quoits M are operatively
positioned by gear bolts l6, being secured thereto
by nut elements I‘! which are carried by threaded
portions l5 thereof, Figs. 1 and 2. Carriers 12,
which are supported on the top plate H} by means
of the top and bottom plates “3 and. I9 of the foot
portions thereof, are guided along the raceway
by means of heart pieces 20 extending from car
rier pipes 22. Actuation of the carriers is effected
through means of lugs 23 and a gear train (not
shown) operating in well known manner.
Bobbin rests 24 are secured to each of the
carrier pipes 22 thereby providing supports for
bobbins 25, see Fig. 1, while guide eyes 26 are
carried by the upper extremities of the carrier
pipes 22 for guiding the thread 21 from the bobbin
25 to the braiding point (not shown). The thread
guide eyes are preferably made of an extremely
hard polished material, such for instance as
porcelain.
‘
Upon the upper end l5 of the stationary gear
bolt “5, or upon as many thereof as desired, is
secured a warp guide 30 for guiding the thread
from the warp supply (not shown) to the braid—
ing point while the thread from the bobbins 25
is interbraided therewith coincident with the
movement of the carriers [2 around the raceway.
In accordance with my invention, I provide a
series of thread guide eyes or eyelets 32 which
are respectively anchored to arms 34 of the up 40
right base element, support or standard 30, see
Figs. 3, 4 and 5; while additional guide eyes or
eyelets 35 are movably supported in parallel
planes intermediate the eyes 32.
The eyes 35
are carried by spaced arms 36 extending from
a tensioning lever 31, which is~inturn operatively
supported between brackets 38 and 39 by means
of a pin 40. One end of the pin 40 extends
through suitable openings formed in the brack
ets 38 and 39, as well as through the bearing por
tion of the tensioning lever, while the opposite
end thereof is loosely supported in a bracket 42,
see Fig. 1.
Extending from the upper end of the pin 48 is
a lock or holding element 45 for cooperating with 58
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2,121,739
a shoulder 46 formed on the upper surface of the
bracket 38, Figs. 1 and 5. These members 155 and
46 cooperate in manner necessary to releasably
hold the pin 40 to the standard to prevent inoper
ative rotative movements thereof. Atorsion spring
43, wound about the pin 40 intermediate the
brackets 39 and 42, has one end secured to the pin
40 whereas the opposite end is anchored to a
member 44 extending from they tensioning lever
31. Thus the spring 43, in addition to normally
biasing the guide eye portion ‘of the tension lever
thread is such as will prevent drawing of the
thread therethrough. However, the spring 43 is
preferably so adjusted that, the tension lever 31
will move from the holding position of Fig. 4 to
the release position, see Figs. 2, 3 and 5, imme
diately upon the stretching of the thread to its
elastic limit, thereby feeding the thread to the
braiding point while stressed to- its elastic limit,
while however preventing rupture thereof. It will
be appreciated that following the stretching of
the thread to the elastic limit, or to some other
out of axial alinement with the stationaryguide .. predetermined limit controlled by adjustment of
eyes 32, likewise maintains the position-accen—
tuating or holding element 45 in holding engage
ment with the shoulder portion at of bracket '38
whereby the tensioning in?uence of the spring 53
spring 43, the thread will be supplied to the
braiding or fabricating point under the predeter
mined tension conditions. Thus the thread will
be held in the warp guide eyes until the force
applied thereto to draw it through the guide eyes
operative movements of the pin are prevented.’ 732 and 35 is of suf?cient intensity to overcome
The torsional action of the spring 413 may readily the kinking action applied by the spring 43 and
the tension lever 37, whereupon restrained sliding
20 be increased or decreased by raising the pin and
moving the element Q5 out of engagement. with movement of the thread relative to the guide
is maintained at a predetermined degree and in->
the shoulder 45 and rotating the pin 40 clockwise
or counterclockwise, Figs. 4 and 5, the required
extent before reseating the element 135 into look
25 ing engagement with the shoulder 46.
It will be observed that the tensioning lever
31 is turnably mounted on the pin ?ll, being con
nected thereto through means of the spring Q3,
opposite ends of which are respectively secured
to the pin 40 and to the extension 44 of lever 3'3,
see Figs. 1 and 4. Thus inasmuch as the pin IE9
is held in any desired rotative position through
means of the members 45 and 46, and since the
tensioning lever 31 is rotatable relative thereto,
the torsional action of the spring 43 is directly
transmitted to the lever 31 whereupon the guide
eyes 35 are normally biased from, and out of
axial alinement relative to, the stationary eyes
32,
Fig. 3 illustrates the zig-zag course followed
by the elastic thread 50 as it is drawn through
the respective guide eyes during operation of the
machine. This path is appreciably modi?ed as
compared with the course followed when the re
spective eyes are positioned as in Fig. 4, in which
latter position the thread is prevented from pass
ing therethrough because of holding action ef—
fected by the acute angular relationshipexisting
between adjacent portions of the thread posi
tioned therein.
_,
In order to permit stretching of the ?nished
product it is desirable,-during the fabrication of
the fabric, that the elastic thread be incorporated
in the fabric while stretched to the elastic limit.
This condition is readily effected through means
of this invention inasmuch as the tension of the
spring 43 may be adjusted to prevent passage of
thread therethrough until the elastic limit is
reached. Thus when the process of fabrication
60 has been completed the elastic thread incorpo
rated therein returns to its normal undistorted
condition, whereupon the fabric proper, embody
ing a corresponding degree of resiliency because
of the presence of the elastic thread, likewise re
65 sumes its undistorted status. Different threads,
separately embodying corresponding degrees of
resiliency, may. readily be used in conjunction
with this device with equal efficiency inasmuch
as the adjustable feature associated with the ten
70 sioning lever 31 makes it possible to regulate the
biasing» action thereof accordingly as desired.
During the initial operation of a machine em
bodying this invention the tension lever 31 is nor
mally biased in thread looking or holding posi
75 tion, see Fig.7 4, in which the angularity of the
eyesis effected.
From Figs. 1 and 5 it will be observed that the
spring 43, in addition to controlling the degree of
holding action exerted upon the thread by the 25
lever 31, also acts as a compression member
through means of which the lock piece 45 is
biased into holding engagement with the shoulder '
portion Mi, whereby the axial as well as the ro
tative positioning of the pin 40 is accentuated. 30
Through means of the adjustable feature ‘em
bodied in the member 45, the torsional effect of
the spring 43 may be regulated to take care of
any condition to which the device may be sub
jected insofar as diiferent' kinds of thread are 35
concerned.
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The mounting herein provided for the pin 40
is of simple. construction to permit ready adjust
ment of the control spring 43, and also to facili-'
tate replacement of the springs whenever it is
found expedient to do so.
.
Of course, the improvements speci?cally shown
and described by which Irobtain the above re
sults, can be changed and modi?ed in various
ways without departing from the invention here
in disclosed and hereinafter claimed;
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I claim:
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1. In a braiding machine and the like, the com
bination with a series of braiding carriers, of a
stationary thread guide and tensioning ‘device
comprising a standard,~aligned thread guide eyes
spacedly positioned on said standard, a tension
ing lever turnably mounted on the standard and
swingable from thread holding to threadreleas
ing position, a series of aligned guide eyes on said 55
lever, a pin element supported by said standard
providing a pivotal mounting for said-tensional
lever, and resilient meansintermediate said pin
and tensioning lever normally biasing the tension
ing lever into thread holding position.
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'1
2. A thread guiding and tensioning implement
for braiding machines and the like, comprising a
standard, a series of. stationary thread guides
spacedly supported thereon, a thread tensioning
60
member swingably mounted on said- standard
having yarn directing ?ngers extending therefrom
movable in planes parallel to. said stationary
guides and cooperating therewith to control feed
ing. of thread therethrough, a pin member carried
by said standard providing a pivotal mounting for 70
said swingable tensioning member, and means
intermediate said pin and standard for releasably
holding said pin relative to said standard.
3. A thread guiding and tensioning implement
for'braiding machines and the like, comprising‘a 76
3
2,121,739
standard, a series of stationary thread guides sup
ported thereby in parallel spaced relationship, a
thread tensioning member swingably mounted on
said standard having thread directing ?ngers ex
tending therefrom movable in planes parallel to
said stationary guides and cooperating therewith
to control the feeding of thread therethrough, a
pin member intermediate said standard and ten,
sioning member, and resilient means for biasing
said ?ngers from said stationary thread guides.
‘l. A thread guiding and tensioning implement
for braiding machines and the like, comprising a
standard, a series of stationary thread guides sup
ported thereby in parallel spaced relationship, a
thread tensioning member swingably mounted on
said standard having thread directing ?ngers
extending therefrom movable in planes parallel
to said stationary guides and cooperating there
with to control the feeding of thread there
through, a pin member intermediate said stand
ard and tensioning member, and a coil spring
mounted around said pin having opposite ends
secured to said pin and tensioning member for
biasing the latter towards thread holding posi
tion.
5. A thread guiding and tensioning implement
for braiding machines and the like, comprising
said pin member having its opposite ends secured
to said pin and tensioning member for biasing the
movable guide eyes from said stationary eyes.
8. A thread guiding and tensioning implement,
comprising a support, a series of stationary thread
guides supported thereby in parallel spaced re
lationship, a thread tensioning member swing
ably mounted on said support having thread di—
recting ?ngers extending therefrom movable in
planes parallel to said stationary guides and co 10
operating therewith to control the feeding of
thread therethrough, a pin member intermediate
said supportand tensioning member, a coil spring
mounted around said pin having opposite ends
secured to said pin and tensioning member for 15
biasing the latter towards thread holding position,
and means for adjusting the rotative positioning
of said pin for varying the biasing action of said
spring.
9. A thread guide and tensioning implement, 20
comprising a standard, a plurality of stationary
thread guides spacedly supported on the stand
ard, a thread tensioning member swingably
mounted on said standard having yarn directing
?ngers extending therefrom movable in planes 25
parallel to said stationary guides and cooperat
ing therewith to control feeding of thread there
a standard, a series of stationary thread guides
through, a pin member carried by said standard
supported thereby in parallel spaced relationship,
providing a pivotal mounting for said swingable
a thread tensioning member swingably mounted
on said standard having thread directing ?ngers
tensioning member, and means intermediate said
pin and standard for releasably holding said pin
relative to said standard.
10. A thread guiding and tensioning implement,
comprising a standard, a plurality of stationary
thread guides supported in parallel spaced rela 35
tionship on the standard, a thread tensioning
extending therefrom movable in planes parallel
to said stationary guides and cooperating there
with to control the feeding of thread there
through, a pin member intermediate said stand
ard and tensioning member, a coil spring mount
ed around said pin having opposite ends secured
to said pin and tensioning member for biasing
the latter towards thread holding position, means
40 for adjusting the rotative positioning of said pin
for varying the biasing action of said spring, and
means for releasably holding said pin in adjusted
position.
7
6. In a braiding machine or the like, the com
45 bination of a raceplate, a raceway in, said race
plate, a plurality of carriers traversing said race
way, and a thread guiding and tensioningimple
ment comprising a standard, a series of stationary
thread guide eyes supported by said standard in
50 spaced parallel relationship, a pin member car
ried by said standard, a thread tensioning mem
ber pivotally mounted on said pin member hav
ing thread directing eyes extending therefrom
movable in planes parallel to said stationary eyes
and cooperating therewith to control the feeding
of thread therethrough, and a coil spring encir
cling said pin member having its opposite ends
secured to said pin and tensioning member for
biasing the movable guide eyes from said sta
60 tionary eyes to control the tension on the thread
passing therethrough.
7. A thread guiding and tensioning device, com
prising a support, stationary thread guide eyes
extending from one side of the support, bearing
65 portions extending from the opposite side of said
support, a pin member sup-ported by said bearing
portions, a thread tensioning member pivotally
mounted on said pin member having thread guide
eyes extending therefrom movable in planes
70 parallel to- said stationary eyes into and out of
alignment therewith, and a coil spring encircling
member swingably mounted on said standard hav
ing thread directing ?ngers extending therefrom
movable in planes parallel to said stationary
guides and cooperating therewith to control the
feeding of thread therethrough, a pin member
intermediate said standard and tensioning mem
ber, a coil spring mounted around said pin having
opposite ends secured to said pin and tensioning
member for biasing the latter towards thread
holding position, and means for adjusting the ro
tative positioning of said pin for varying the
biasing action of said spring.
11. A yarn guiding and tensioning device for a
yarn fabricating machine, comprising a ?rst
yarn guide means including a series of yarn
guide elements disposed in ?xed aligned spaced
relation to each other, a second yarn guide means
vfor cooperation with said ?rst yarn guide means
including yarn directing means, said yarn direct 55
ing means and said series related yarn guide ele
ments being disposed in interspersed series rela
tion to each other, supporting means for one of
said yarn guide means, and spring biased yarn
tensioning arm means carrying the other of said 60
yarn guide means, said arm means being laterally
movable to move its yarn guide means away from
a ?rst position in alignment with said one yarn
guide means to a second yarn tensioning position
laterally from said alignment position at only one
side thereof and back toward said ?rst position,
said second position being the only position other
than said first position to‘ which any of the yarn
is moved by the device.
HENRY JANSSEN.
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