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Патент USA US2132462

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2,132,462
W. A. DICKIE ET AL.
THREAD TENSIONING DEVICE FOR CIRCULAR. LOOM SHUTTLES
Filed Nov. 27, 1956
\ 1m
/5
WILLIAM A mam
'
RANK 0 HALE
ATTORNEY;
Patented Oct. 11, 1938
2,132,462
v
1, ‘tom-TED’ STATES "PATENT OFFICE
2,132,462 ‘
THBEAD-TENSIONING DEVICE FOR CIRCU
'
LAB LOOM SHUTTLES
asslgnors
Hale,vo
‘William Alexander Dickie and
Frank Gorbyn
England,
Spondon,
Derby,
a corporation
Celanese C‘orporation of America,
‘of Delaware
112,964
Application November 2'7, 1936, Serial No.
936 '
In Great Britain January 17, 1
3' Claims. (01.ing139-13)
one form
This invention relates to thread-tensioning de
0
vices for circular loom shuttles and in particular
for the weft spools of circular loom shuttles of
the type shown in. U. S. Patent No. 2,050,328 in
which the weft is wound between two ?anges
of considerable diameter in relation to the axial
depth of the spool.
,
.
7
According to the invention, the spool is held
stationary and the weft is led over one ?ange of
the spool by means of an, annular guide co-axial
the apparatus shown in Fig. 1;
'
shown in Fig. l and equipped withanother. form
of apparatus according to the invention; and
Fig. 5 is a cross-sectional elevation of part of
the apparatus shown in Fig. 4 viewed on line
5-5 of’ Fig. 4.
Figs 2, 3. and 5 are drawn on
4.
I
larger scale than,
Referring to Figs. 1 and 2 the shuttle 6 carries
by ‘means of clips 6| a stationary weft spool ‘I
from which weft thread 8 proceeds through
guides 9,‘ l0 disposed on the shuttle to the‘fell II I
'of the fabric. ,
The guide may be in the form of a light wire
spider with its rim lying in the plane of the
The spool ‘I is bored centrally to receive a bush
‘2
ing l2 (Fig. 2) which forms a bearing for a rotat- so
20 _ spool ?ange or even somewhat inside this plane;
or, in order to make sure that contact with either
the inside or the outside edge of the ?ange is
avoided, the width of the annulus may be in
creased, as, for example, by forming it of two
able. hollow spindle l3 of a weft unwinding and
tensioning device. The device comprises a light
wire spider consisting of arms l4 and a rim l5,
the arms being radially supported by an out
standing ?ange Hi formed at the outer end of 25 .
the hollow spindle l3 and being bent. inwardly
25 wires side by side.
’
, The guide may be arranged to rotate so as to
‘provide, for low weft tension, this rotation being
provided either by pivoting the guide about the
centre of the spool or on an independent support.
The weft may be caused to engage the annular
guide positively so. as to rotate the guide and
add to the weft‘tension. This positive engage
ment may, however; be such as to permit the
guide to overrrun the weft, e.‘ g. when weaving
stops, as by the provision on the edge of the
guide of a number of small hooks with which
the thread engages as it rotates about the spool
during unwinding, over-running of the guide re
leasing the weft from the hook with which it has
become engaged.
'
Fig. 3 is a plan of a detail of Fig 1;
,7 Fig. 4 is a side elevation of a spool of the type
' 'the tension in the weft thus being largely de
40
' ‘
Fig. 2-is a cross-sectional elevation of part of
with the spool and disposed so as to prevent con
tact of the weft with the spool ?ange. The weft
is led substantially to the centre of the annular
_ guide and then delivered to the fell'of the cloth,
termined by its de?ection over the edge of the
annular guide and at the centre of the guide.
of apparatus according to the in
vention in association with the weft spool;
For this purpose the hooks
are preferably arranged so that during such over
running the weft may pass freely over the hooks.
In order to prevent weft that has become loose
on the spool when weaving stops from leaving
the spool and becoming snarled in the shuttle or
so as to hold the rim l5 substantially in the
plane of the front ?ange of the spool 1.
.
At the commencement of weaving the weft
thread 8 isled over the rim l5 of the spider and 30
threaded through the hollow spindle 13 from the
of the spool, from whence the
front to the rear
thread passes to the guides 9, l0 vand to the fell
H of the fabric. The weaving. tensionrin‘the
thread causes it to bear against the rim IS in 35
the spool with the result that the
spider rotates and guides the thread clear of the
front ?ange of the spool. The direction ‘of ro
tation of the spider l4, I5 is indicated by an
arrow in Fig. 1.
thread 8 engages 40
formed with out->
the rim [5 positively the rim is
standing hooks l8 at intervals round its periph
ery (see Figs. 1 and 3), any hook engaging the
thread while allowing of free passage of the 45.
thread across ‘the rim I5. The shanks of the
hooks 18 are shaped in such a manner as to o?er
mechanism connected therewith, as for example
no resistance to disengagement of the thread 8
the event of over-running of the
when crepe or other twisted yarn is used, a box
or casing may be disposed so as to surround the
spider
F0 spool closely.
By way of example some forms of apparatus
, according to the invention will now be described
in greater detail with reference to the accom
panying drawingin which
Fig. 1 is a side elevation of a
shuttle embody
bases
thethat the hooks may pass the thread
IS in ‘of
order
freely without catching the thread during any
such over-running of the spider. Inthis manner
though the spider assists in unwinding the thread 55
.8 during weaving any over-running of the spider
2
2,132,462
7
on stoppage'of weaving does not cause the weft
thread 8 to continue to unwind.
In order to tension the thread 8 and to reduce
any tendency to over-running of the spider I 4,
cessive over-running of the thread on stoppage
of weaving, a length of furry material 34 such
as closely cropped sheepskin or catskin is disposed
so as to contact with the rims 32 and consequently
termine'ddegree.of_resistance.to rotation of the
hollow spindle I3. 'Thus, the‘bore of ‘the bushing
fur is secured to a curvedlsupport 35 which is
suitably attached'to the shuttle.
While in Fig. 4 the fur 34 is shown contacting
I2 is of larger diameter near the flange l6 (see
spring 2!] which encircles the hollow spindle 13' "32 it will be understood that when weaving a 10
and bears at one end against the interioro'ffthe weftgof'a type "which. tends to snarl or unwind
bushing I2 and at the other against-"the ‘?ange
'from the spool too freely, e. g., a crépe weft, fur
hollow spindle I3 is heldin position againstthe 7 3-2 of the type shown in Figs. 4 and 5 has been 15
looking spring 2! which bears against a washer
unwinding spider, it will be understood that
22 and ?ts into a groove ‘formed. round the‘endv suchiimcouldbe provided on a rotatable spider
as at 24 and slightly expanded and sprung; so as
doublerirns 32 of Figs. 4 and 5 could be replaced 20
into'position'in'the bore. The resistance to‘rotation of‘ the‘hollow'spindle I43‘ (and hence-the‘de-
an'd*2.
Having described'ourinvention what we desire
greeof tension in the thread'a') may be ‘varied
to secure by Letters Patent is:
by changing the spring *20’ for one of different
strength.
In ‘Figs; eiandl5‘a‘spool‘25having a nonerotating weft unwinding‘gui'deinthe form of a light
1. 'A‘circulari‘loom'shuttle'comprising a circular 25
weft *spool " having 'flanges ‘of considerable depth,
means'for holding ‘said‘ spo‘otstationary in the
shuttle, an annular guide disposed‘coaxially with
trally‘to‘receive‘ a hollow core 26v which is ?xed
ing from the spool from contactin'g'with a ?ange 30
in'the bore of thespool'by a locking'spring 27
of thespool; and means co.-operating with .said
and a‘ co-opera'tingtwasher 28 disposed’ at the
guide for restraining‘ too'free passage of' the
inner end of the core. ‘The-core '26 holds a'tube
‘thread round the ‘guide;
.29v of porcelain or the’ like ‘which’ guides the
thread smoothly/from the front to the‘rear of
2.‘ -A circular loom‘shuttle’coinprising. a circular
weft" spool having ?anges 'ofv considerable depth, 2'
‘
Li
arms‘ ‘3| are bent‘ inwardly'towards the spool
arms coaxially'with the spool and on' opposite -<_i0
At- the commencement of weaving the weft
thread (designated by 33 ‘in ‘Fig. 4) is led over
the rims 32 and threaded-through thetube 29
operating ‘with said? guides for restraining’ too» t
free passage of the thread round the guides.
3;.A‘ weft spool for circular loom shuttle com
from the front t'othe‘rear'of" the spool 25. The
‘prising anrannular guide ‘disposed c0—axially with
’ round the rims 32, the-disposition of which en-
.ingfrom'the spoolifrom contacting with a ?ange,
‘sures‘th'at‘ thethread‘is' guided clear of the‘inside
andoutside surfaces of f th'eouter'?ange .of‘the
of the‘spool, and'means co-operating with said
guide ‘for restraining :too free passage. of the
spool.
threadv round‘the guide.
I
'
.
In ‘order to prevent too free passage of the
‘thread-3'3 round the rims 32, and to'prevent ex-
WILLIAM ALEXANDER DICKIEI.
FRANK vCORBYN HALE
'
v55
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