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Патент USA US2124422

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July 19, 1938.
Filed June l0. 1935'
Patented July 19, 193s">
Frederick mein, Glen Rock, and Henry Uhlig,
Clifton, N. J., assignors to Sipp-Eastwood Cor
poration, Paterson, N. J., a corporation of New
Application June 10, 1935, Serial No. 25,768
lClaim. (Cl. 242--155)
This invention relates to yarn tension devices
and particularly to yarn tension devices of the
kind set forth in the Klein Patent No. 1,942,511
in which a suitably braked pulley constitutes the
principal tension factor when, by suitable means
anterior to the pulley, the yarn is preserved in
merely snubbing relation to the pulley. One ob
ject is to provide for the absorption of vibra
tions which, due to the pulley failing closely to fit
its axial support, are known to detract from
uniformity in the tension on the yarn. Another
object is to construct the device so that with re
spect to the snubbing means a self-cleaning
action may proceed when the device is in opera
tion. Still another object is so to construct the
device that it may be adapted to raw silk yarn
or other yarn carrying gum or other matter likely
to interfere with eiiìcient operation of the de
vice as well as other types of yarns.
In the drawing,
Fig. 1 is a side elevation of the device and a
portion of its supporting bracket;
Fig. 2 is a right-hand end elevation thereof;
Figs. 3 and 4 are top and underneath plans
thereof, respectively;
Figs. 5 and 6 are sections on lines 5-5 and
'6-6, respectively, Fig. 3;
Figs. 7 and 8 are enlarged fragmentary sec
tions of the disks 20 and 2l taken in the plane
30 of travel of the yarn, the views respectively
showing the positions of the upper disk with the
yarn present and travelling and with the yarn
Though having other uses the device is espe
cially useful to tension a. thread or yarn of a
warp being drawn from a creel, as in Patent No.
1,885,114, upstanding from the frame of which
may be an arm or bracket I whose upper end is
formed dove-tailed in section to fit a certain
40 dove-tailed socket of the support or ñxed part
of the device, which may be a casting.
Such support includes a loop 2 lying in a hori
zontal plane and a projection 3 extending hori
zontally from the loop and having one side
45 thereof approximately tangential to the loop and
its opposite side approximately parallel with the
tending transversely of the support and a yarn
guide ‘I which upstands from the projection 3
and has its bore approximately parallel with the
slope. The slope 3a is pitched, as will appear
from the drawing, transversely of the yarn in its 5
travel from guide 1 to the pulley. Fixed to the
under side of the support in traversing relation
to the loop, as -by screws 8, are a metal plate 9
and an insulating plate I0 (between plate 9 and
the support), these being so notched and ar- l0
ranged (Fig. 4) that'the pulley-carrying spindle
l2 will on the one hand engage the metal plate
and on the other hand the insulating plate when
it is shifted one way or the other. Projection 3
has the mentioned socket, 3x, to receive the upper l5
end of bracket I.. So much for the ñxed struc
ture of the device.
The arm 6 has a horizontal bearing II for the
bent-off end or trunnion of the mentioned spin
dle, I2, upstanding from the bearing, the bend 20
in the spindle being such that the spindle stands
canted somewhat as viewed in end elevation of
the device (Fig. 2), whereby to reduce the tend
ency of the trunnion to bind in the bearing
under the weight of the spindle and its load. 25
The spindle has fixed thereon a disk I3 above
which is the pulley, now to be described.
In the form shown in Figs. 1 to 5 the pulley
comprises a central bearing I4, which may be of
some suitable light oilless-bearing non-resilient 30,
material, as Arguto, and a body portion l5 of
resilient and flexible material, as rubber. The
bearing and body portion have a circumferential
tongue-and-groove connection I6 with each
other, the body portion being suñiciently iiexible 35
and elastic to permit it to be stretched over the
bearing portion to effect engagement of the
tongue and groove, it then constrictively em
bracingthe bearing.
The pulley has an upper iiange of smaller 4()
diameter than the lower iiange, the two flanges
being formed with theiradjoining faces conical
and converging toward each other, preferably
nearly bui'l not quite to form an actual apex.
'I‘he bearing of the pulley is formed with a cen- 45
trai hole which receives the spindle. To the
underside of the pulley is glued a friction ring
as to afford vertical clearance for the portion I1, which maybe of felt, the same being adapted
of the yarn which departs from the device, as to engage the disk I3.
Over the stud 5 is ñtted, free to revolve, a 50
appear. The projection has a top forward
slope 3a formed with a circular cavity 4 having tubular porcelain yarn-guide or post I8 and over
a central fixed upstanding stud 5 perpendicular this, resting on the bottom of the cavity l, is
to the slope. Fixed parts of the support are a ntted a felt ring I9. Penetrated by the post
depending arm 6 which is offset from the center and resting on the. ring I9 is a pair of thin metal
disks 20 and 2 I , the upper one having a weighting 55
56 of the loop and lies in a diameter thereof ex
- ñrst side but extending in a chord of the loop so
9,194.4» »
' disk existing _in two layers 22 and -22a soldered bearing hole to the spindle is not necessary and
together and to‘disk- 20 and such disk 20 being ' a relatively considerable amount of wear of the
formed with 'a central tubular stud 20a which is hole may ensue before the vibration then possible
received in the central hole of disk 22 and has its deletexiously affects the tension in respect to uni
upper or free end peened over upon the latter.
As shown in Figs. 7 and 8 each disk is formed
pronounced if, as shown at Ilz, the perimeter and
circumferentially corrugated,- their corrugations
central portions of the pulley are connected by
'I'he resilience of course is the more
being such that when they are coaxial and super
a relatively thin web, which gives the further
posed they mesh with each other. 'I‘he die~ for advantage that the perimeter portion may as
10 forming each disk willpreferably have concen
sume under high speed a position more or less 10
tric sharp-edged ’corrugations, wherefore at the angularly displaced from the normal or perpen
side of the disk directly opposed to the >die the ~dicu'lar relation to the pulley’s axis. Further, if
corrugations formed will in a diametric section the actual perimeter of the pulley is formed of
present sharp-re-entrant angles ‘23 but at the resilient material, as in Fig. 5, the frictional grip
opposite side they appear with rounded crests 24. between the yarn and pulley is enhanced.
In short, the construction is such that with the
Because of the travel of the yarn between the
disks superposed as in Fig. 8 and no thread inter
vening their opposed faces would contact every
where except where each rounded crest coincides
20 with an angle, whereby when the yarn inter
venes and in the absence of foreign matter (as
will appear) the disks obtain a good frictional
grip on the yarn, undue abrasive and other
harmful action on the thread being avoided by
25 the rounding oi the crests.
Plate 9 has an extensionßa to which to con
nect a wire of an electric circuit completed by
the frame of the creel, the support and spindle
of the tension device when the spindle 4is allowed
30 to contact with said plate, said circuit containing
any signal or other electro-actuated medium as
in said Patent No. 1,942,511; as will appear, the
spindle is normally held byA the yarn in the posi
tion of Fig. 4, abutting the plate I0, so that the
circuit is open.
The yarn a extends from the source of supply,
as a spool or cone on the creel, between the disks
disks 2li-.2| and around guide Il the upper disk.
rotates slowly and the lower disk still more slowly
due to the drag on the lower disk produced by the
felt ring IS, which further allows the lower disk 20
to yield thus to prevent disruption of the (fast- f
travelling) yarn should a lump or slub therein
suddenly encounter the disks.
I The incline of the disks, especially in view of
their propulsion, rotatively, by the yarn, is a 25
factor in removal by gravity of any foreign mat
ter that might intervene between them and so
(if such matter is of greater diameter than the
yarn) prevent them from setting up that resist
ance to the travel of the yarn which they should 30
interpose as in the said Klein patent-to wit, sum
cient only to cause the yarn to be held in con
stant snubbing relation to the pulley, which is
substantially the sole tension factor. For use
with other yarns than raw silk yarn disks pre 35
senting flat faces to each other might be used.
But in the case of a raw silk yarn or other yarns
2li-2|, in contact with the guide I8, then around
carrying matter, as gum, likely to collect between
the pulley for a half turn and thence to the reel
40 of the warping machine or other draft medium.
These observations are necessaryto an accurate
the disks we ñnd it necessary so to corrugate the
appreciation of the importance of our invention:
In the practical use of tension devices of the
class of that of the said Klein Patent No, 1,942,511
it is- found that disposition of the pulley tochatter
or to vibrate in any direction transversely of its
disks concentrically that their corrugations tend 40
under the weight of the upper disk to intermesh
and so more or less shape the yarn a to sinuous
form between them, asin Fig. 7. Any particle, as
of gum, in that case entering between the disks
in practice finds refuge, as at b, in a depression 45
of the series of corrugations, thus still to permit
the crests of the corrugations to offer frictional
resistance to the yarn and hence to continue the
disks in rotation, with the result that if such
particle does not become otherwise detached as 50
axis quite materially detracts from uniformity
of tension, which of course not only deleteriously
affects the particular yarn controlled by a given
tension device but the entire warp where such
is being formed by drawing a number (usually
by movement of the disks, it will be eventually dis
hundreds) of yarns from a creel simultaneously.
The only recourse heretofore was to bore each
attached forces it around against the travelling
pulley bearing hole with such accuracy that
whereas the pulley would freely turn there would
be practically no possibility of transverse dis
placement, but even then wear of the bearing
hole or of the spindle intime resulted in such
According to this invention a resilient cushion
exists between the pulley bearing, as I4 or Ha,
and the perimeter of the pulley. If this cushion
exists as at I5 in Fig. 5, or so that substantially
all of the pulley which surrounds _the bearing is
resilient. the vibratory effect is substantially
wholly absorbed and a practically ideal uniform
ity of tension results; at least, a careful ñt of the"
placed by the yarn, as the disk to which it is
yarn, and fall away from between the disks.
Having thus fully described our invention what 55
A yarn-tension pulley of the class having a
peripheral yarn-engaged surface facing gen
erally outward, said pulley having a central bear
ing of relatively non-resilient material and also 60
having the circumferential portion thereof
affording such surface formed of resilient plastic
material, the portion of the pulley between said
bearing and first-named portion being a rela
tively thin web.
we claim is:
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