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Патент USA US2410383

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Oct. 29, 1946.
J, _;_VKAKUFMANNS JR
LOOM SHUTTLE
Filed Ja?. ll, 1945
I
2,410,383
2,410,383
Patented Oct. 29, 1946
UNITED STATES ’ PATENT i oFF-ics [ff
.lohn J. Kaufmann, .l r., Greenville, S. C., assignor
to Steel Heddle Manufacturing Company',
Philadelphia, I’a., a corporation of Pennsylvania `
Application January 11, 1945, Serial No.>5'l'2`,34'5$f
'
(Cl. 139-217)
’l Claims.
l
This invention relates to shuttles for looms,
andit relates more particularly to the provision
of improved means, in such shuttles, for main
taining the proper tension on the filling yarn as
f a tension device, of the character aforesaid;
which will be simple and inexpensive in 'construc
tion, which may be readily and easily `assembled
in the threading'block, and which is adjustable
therein without dismantling the same.
the shuttle is passed back and forth through
successive sheds of the warp.
In the shuttles which are used in the modern
types of automatic looms a threading'block is
usually provided 'at one -end of the'shuttle, which
block is provided'with means for automatically
causing the filling yarn to be threaded in the
shuttle immediately after the bobbin has been
replenished in the shuttle. Such threading
blocks are made in various shapes and styles and
in >some instances, where it is desirable to con
tr‘ol the tension of the filling thread more or less
'-
’
The nature and characteristic features of the
invention will be more readily'understood‘from
the following descriptions taken in Acor'mection
with the accompanying drawing forming part
hereof, in which:
'
'n
_'
Figure 1 is a top or plan view of the threading
end portion of a loom shuttle having a threading
block mounted therein and provided' with a ten
sion device embodying the main featuresofthe
present invention;
'
j.,
p
Fig'. 2 `is an enlarged end elevationv of Vthe~
threading block detached from the shuttle,'illus-'
trating more particularly the constructionL and
"
accurately, said threading blocks are provided,
usually at the end thereof to which the filling
arrangement of the tension members which- .are
block, with> spring , pressed members between 20 mounted
Fig. 3 istherein;
an enlarged longitudinal'se‘ction
' '
'
` ' ofthe
which the thread travels as it passes to the chanT
i
threading
block
detached,
the
section
being
taken
nel Vof the threading block, and thereby there
thread is fed from the'bobbin to the threading
is provided a uniform tension on the filling yarn
lFig. 4 is an enlarged horizontal section of a
as the shuttle passes from side to side of the loom
in the operation thereof.
portion of the threading block, taken on the lirie
p’ " "
i Various Aforms of such tension devices have
d-ß
' Figïß
of Fig.
is an
2; enlarged hori‘zontaljsectionbf
ì
.. " a
heretofore been suggested, Yand it has lone been
recognized, as a’desideratumjo provide, in con
nection‘ with the tension members, some means,
or van arrangement thereof, whereby there Will
portion-of the threading block, taken on thve'li'n'e
i Fig. 6 is an enlarged longitudinal fs‘ection ofa
portion ofthe threading block assh‘ownfi'n' Fig '3'
bea tendency o_f the filling yar'nt'o pass down
but illustrating amodlned‘form eff tension "
wardly at the entrance end ofthe threading
block,v to the end that- there will be less vlikelihood
of *ther shuttle becoming unthre'aded during the
'operation of the loom, by reason 'of overthrows
or loops which sometimes occur upon the rever
ber.
It should,
.. of
, course'
„
.,be . understood
.
, „ 'that'
,
tl’iê r,def
scription and drawing herein are illustrative
~ merely,
devices or arrangements have not proved entirely
'
y ’
'
j
'
.
and ‘ that ,various
rn'odificatîons_"and
changes may be made in thewstructuredisclosed
Without departing from the spirit of the inven
sal of movement of the shuttle.` However, such
satisfactory in use.V
‘ "
tion.
'
"
ì
'
Referring to the drawing, in the particular
embodiment of the invention therein shown, the
'shuttle'body l0 is preferably’made of wood, and
Y 'f'he- principal objectithere'fore', of the present
invention, is 'to provide anV improved form of ten-`
sion device for automatically threading shuttles,
has the‘usual bobbin'chamber Il in which the
vvhi'chis so `constructed ‘and arranged as to cause
thejfilling yarn to‘pass downwardlyinto the low--y
bobbin l2 is held by the 'usual grippingV means
er‘portion‘of the thread Vchannel‘and to so main-y
tai'ngSaidV yarn so'v that likelihood of unthreading
of the shuttles from overthrows or loops will be
charged therefrom and a new bobbin substituted
(not shown), whereby it may be readily -dis
as the fillingruns out from time to ti‘mef i" . ' `
Y The shuttle body lll is also providedwith y.the
usualside delivery eye I3 'for the passageofjth'e
A further object of the invention is to provide
aftension device,'of the character aforesaid, in 50 filling yarn ld. The vthreading block ll 5 comprises
which“ the initial' threading of the shuttle will be ' primarily a casting preferably made of _ metal',
either cast iron or brass as desired; >Said block
greatly facilitated by reason "of the ease with
lähasits outer'side surfaces I6 and f_ll prefer.v
which the filling thread will pass to' the proper
ably parallel withl each other, and its bottom sur
location between' the t'ensionmembers
`
greatly minimized. ,
'
¿A further’object of theV inventionv is Yto provide
55
face „i8 substantially atv right ?angles,theretcvn'."Ifhe
$2,410,383
4.
body portion of the threading block I5 is fitted
the other edge thereof. This arrangement will
tend to facilitate the passing of the filling thread
into a complementally shaped groove I9 in one
end of the body portion IE) of the shuttle.
to the proper location between the tension mem
The body portion of the threading block I5 is
bers when the threading action takes place. This
provided with a longitudinal channel 2U through
which the filling thread I4 passes to the side de
arrangement will also serve to increase the efû
ciency of the tension device and reduce the like
livery eye I34 during the weaving operation and
lihoodof >breakage ofl the fillingy thread from
as said filling'îyarn is laidA in the cloth.v
knots or unevenness therein. l .f
The threading block I5 may also -be provided
In the modified form of the invention shown
with a rearwardly extending horn portion 24, and 10. in Fig. 6 of thc drawing the face portion of the
an intermediate horn portion 25 extending into
tension member 25a is tapered from the top to
the longitudinal channel 20 of the threading block
the bottom by providing an inclination along
I5, said horn portion 25 serving to assist in the
each of the side edges thereof, and in this man
initial threading of the block, and in the reten
ner the degree of the taper may be increased. In
tion of the ñlling yarn therein after the threading 15 this instance the flange ¿lia will also be reversely
operation has been completed.
At the inner end of the threading block I5,
that is, the end disposed toward the bobbin, there
tapered.
In either of the foregoing arrangements the
filling yarn, as it travels between the tension
is mounted a pair of tension members 26. The
members, will be caused to pass downwardly by
reason of its natural inclination to take the path
of least resistance and to position itself where the
width of the tension members is less. Further
more, the reverse taper of the portions 44 will
assist in causing the filling thread to be impelled
downwardly as it runs through the threading
inner end of the threading block I'I is recessed
vertically, as at 28, for the mounting of said ten
sion members- 26 therein.
.The lower ends' of the tension members are
each’provide’d with a suitable aperture 29 through
which extends a pin 3i) mounted in the lower
portion in the >inner end of the threading block
I5. The upper end lof each of the tension mem
block.
4Iclaim:
bÍe?s is 'bent .over as at 3l to provide lug like ex~
tensions '32 which are positioned respectively in
Y
.
_
.
1. In a loom shuttle of the automatic thread
ing type a tension device comprising a pair of
suitable apertures 33 provided in the inner end of 30 spring pressed tension members between which
theïthreading block I5. In this manner the ten
the filling yarn passes, said tension members hav
sioiimembers 26 are guided at both the top and
ingiiat coacting faces tapered from the top to
the bottom.
`
,
A
ward the bottom.
-
For the purpose of imparting the required ten
2.~ In a loom shuttle of >the automatic threading
sion to the members 26 so that the same will grip 35 type having a threading block mounted in one
the filling yarn and >function in the desired man
end thereof which threading block is provided
ner. ashereinafter set forth, there are provided
with' a longitudinal thread channel through which
coil springs 34 >which are positioned in the inner
endsl of the hollow screws 35. The hollow screws
the filling yarn passes from the bobbin to the
outlet and spring pressed tension members
35 are threaded in the side walls of the threading 40 mounted in the` threading blockbetween which
block I5 in alinement with the pin 3i) at the bot
the' ñllingyarn passes, said tension members hav
tom and the guiding apertures 32 at the top. The
ing their coacting faces tapered from the top to
hollow screws 35thusserve to provide means for
War'dvthe bottom and having reversely tapered
regulating the degree of tension on the members . portions along their entrance sides.
25>_
-
.
.
` The co-acting faces of the tension members 2B
are preferably -made flat, as hasy been the practice
heretofore, but in the present .instance said co
acting faces of the tension members are tapered
45
3. In a loom shuttle of the automatic threading
type having a 'threading block mounted in one
endÍ thereofwhich threading block is provided
with _ a longitudinal thread channel through
which the ñlling yarn passes from the bobbin to
toward the bottom 'for a purpose to be presently 50 the outlet and springlpressed tension vvmembers
eirplain'eid‘.'lv ’The tension members may, of course,
mounted in the threading block between which
be'providedwith the usual side flanges all at
the flñlling yarn passes, said tension members
either theentrancc side `or on the other Vside
having" their coactingfaces tapered from the top
thereofîjas at jlll. `.'I‘he essential requirement in
toward the bottom and having flanges along their
connection with the present invention is that the 55 entranceside’s connected to the face portions by
co-acting’ faces of' the tension members be ta
reversely tapered portions.
'
' '
pered' toward the. bottom.
4. In a loom shuttle of the automatic thread
` Preferably the flanges 40 vat the entrance side
ing type having having a threading block mount
overlap the sides of the slot 28, in which the ten
ed in one end thereof _which threading block is
sion members‘ZB are positioned, and extend into 60 provided with . a longitudinal thread channel
recesses 43.in the inner end face of the thread
through whichtheA filling 'yarn passes from ’the
ing block. Also the flanges 4U are preferably dis
bobbin
to the outlet 'and spring pressedV tension
posed parallel to theY vertical axis of the tension
memfbers'mounted in the _threading block between
membrersand are connected to the main face .„ which the ñlling yarn passes, said tension mem
portions thereof by inclined and reversely tapered 65 bers having their coacting faces tapered from
portions _44
_
Y
.
I_t shouldfalso be noted that the flanges 4U
along the entrance sides of the tension members
26 arc disposed at a somewhat greater distance
the top toward the bottom and having flanges
along their sides.
'
_
.
..
.5. In a loom shuttle of the automatic threading
_ type having a threading block mounted .in one
from the vertical plane which passes through the 70 end thereof, which threading block is' provided
'elites of the coil' springs than are the flanges 4I
with a longitudinal thread channel through which
along the opposite sides of said tension members.
the filling. yarn ?passes yfro-In the bobbin to the
In this manner the'pressure exerted alongthe
outlet, and spring "pressed tension members
edge at _which the filling thread enters the thread
mounted in the threading block‘between which
ing block will be considerably less than along 75l the
filling yarn passes. said tension members hav
2,410,383
6
ing flat coacting faces tapered from the top to
Ward the bottom.
6. In a loom shuttle of the automatic threading
type having a threading block mounted in one
end thereof, Which threading block is provided
with a longitudinal thread channel through
which the filling yarn passes from the bobbin to
the outlet, and spring pressed tension members
7. 'In a loom shuttle of the automatic threading
type having a threading block mounted in one
en'd thereof, Which threading block is provided
with a longitudinal thread channel through
which the ñlling yarn passes from the bobbin to
the outlet, and spring pressed tension members
mounted in the theading block between which
the iîllling yarn passes, said tension members
having their coacting faces tapered from the top
mounted in the threading block between which
the filling yarn passes, said tension members hav 10 toward the bottom and having flanges along the
sides, the flanges along the entrance sides being
ing their coacting faces tapered from the top
disposed a greater distance from the point of
toward the bottom and having the edges along
application of the spring pressure` than the flanges
the entrance sides thereof disposed a greater dis
along the other side.
tance from the point of application of the spring
pressure than the edges along the opposite sides 15
thereof.
JOHN J. KAUFMANN, JR. .
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