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Oct. 8, 1946.
J. J. KAUFMANN, JR
L00]! SHUTTLE
Filed April 12, 1944
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2,
8,981
Patented Oct. 8;, 1946
2,408,981
UNITED STATES PATENT OFFICE
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‘2,408,981,
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L00M SHUTTLE:
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John J. Kaurmann, Jr., Greenville; s} 04.1. assignor'
to- Steel Heddle Manufacturing-Company, Phil‘
adelphia, Pa., a' corporation of Pennsylvania;
Application April 12, 1944', Serial No. gamete‘
4 Claims. ' (c1. 139L220)
1
This‘. invention relates to shuttles for looms, and
it relatesvmore particularly to‘ the provision, in
automatically threading loom- shuttles, of means
for minimizing the tendency of the shuttles to
become. unthreaded or- of the ?lling yarn to be
come fouled on‘ parts of the thread'i‘ng'block dur
ing'the operation of the loom.
Fig. 5 is. an underneath plan view,v also em
larged, of the front end portion, of said thread
ing block.
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It should, of‘ course‘; be understood that the dee
script-ion and‘ drawing herein are illustrative
merely‘, and that various‘ modi?cations and
changesmay be made in’ the structureldisclosed
In. the shuttles‘ which are used in’ the modern
types of" high speed automatic looms, a thread
without departin'g'imm the spirit ‘of the invert‘;
til-0111'
ing block is usually provided! at the'rear end of 10
the shuttle. I Such-threading‘ blocks are made in
.
Refer?ng to‘the drawing, in'the‘ p‘arti"(:lilai“em;v
bodiment of the invention therein shown, the
shuttle body It! is preferably made of wood and
has the usual bobbin chamber II in which the
bobbin I2 is held by the usual means (not shown)
for, to be threaded automatically through the 15 whereby it may be readily discharged therefrom
threading block, and thence through a side de
and a new bobbin substituted as the ?lling runs
livery eye, the threading action usually starting
out from time to time.
on the ?rst pick of the shuttle and being com
The shuttle body In is also provided with the
pleted on the return pick thereof.
usual side delivery eye l3 for the passage of the
However in the operation of the loom, partic 20 ?lling yarn M. The threading block l5 com
ularly in the modern high speed looms, there is a
prises primarily a casting, preferably made of
tendency of the ?lling yarn to balloon and to
metal, either cast iron or brass, as desired. Said
swirl, and also, when reversal of movement of the
threading block I5 is mounted in a complemen
shuttle, takes place, there is sometimes a tendency
tally shaped recess l6 in the rear end of the body
of the ?lling yarn to unthread itself by an over 25 portion IU of the shuttle.
cast of the yarn, and this often occurs notwith
The body portion of the threading block I5 is
standing the threading block is primarily de
provided with a longitudinal channel I? through
signed to prevent the same.
which the ?lling thread I4 passes to the side de
various shapes and styles and are designed to
cause the ?lling yarn, after an empty bobbin has
been displaced and a full one substituted there
Furthermore it sometimes happens that when
livery eye l3 during the weaving operation,
an overcast of the yarn takes place a loop is 30 The threading block I5 may be provided with
formed which becomes fouled on one of the parts
the usual rearwardly extending horn portion l8,
of the threading block and results in breaking
and an intermediate horn portion l9 extending
of the ?lling yarn and consequent stoppage of
into the longitudinal thread channel I‘! of the
the loom.
threading block IE, or the threading block may
The principal object of the present invention 35 be provided with other similar portions which
is to provide simple, e?icient and inexpensive
serve to assist in or bring about the initial thread
means for overcoming the tendencies above re
ferred to and to insure proper passage of the ?ll
ing yarn through the threading block to the side
delivery eye.
The nature and characteristic features of the
invention will be more readily understood from
ing of the block, as well as the retention of the
?lling thread therein after the initial threading
has been completed.
40
the following description, taken in connection
with the accompanying drawing forming part
At the front end of the threading block 15,
that is the end disposed toward the bobbin, there
is provided, on each side of the thread channel
IT, a vertical groove or recess 20. Preferably said
side recesses 20 extend upwardly from the bot
hereof, in which:
tom of the threading block to a point below the
Figure 1 is a top or plan view of the threading 4.5 top thereof, the casting preferably having a suit
end portion of a loom shuttle having a threading
able overhang Zl at this point on each side for
block provided with means embodying the main
features of the present invention;
Fig. 2 is a longitudinal central sectional view of 50
the portion of the shuttle shown in Fig, 1;
Fig. 3 is a front elevation, enlarged, of the
the purpose of guiding the ?lling yarn during the
threading operation.
In each of the grooves or recesses 20 there is
mounted a strip 22 of fur, the hair or ?ber of
which is of a relatively ?ne texture. The texture
threading block removed from the shuttle;
of the fur employed will to a certain extent be
Fig. 4 is a side elevation, partly in section, and
dependent on the size of the ?lling yarn.
also enlarged, of said threading block; and
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Advantage is taken of the fact that the ?bers
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or hair ?laments of fur usually extend at an an
gle of inclination to the skin 23 which carries
the same, and the strips 22 of fur are‘ there
fore mounted in the recesses 20 on each side of
the thread channel I‘! with the ?bers disposed
at a downward inclination (see Fig. 3), and the
fibers of each strip 22 of fur are of such length
as to extendto iandcontact with the ?bers of
the other strip;
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By the foregoing arrangement, when the ?lling
is once threaded in the threading block IS, the?“
strips 22 of fur between which the ?lling yarn
“ passes as it enters the threading block l5 will‘ "
2. In a loom shuttle having a threading block
mounted in one end thereof and provided with a
longitudinal thread channel through which the
?lling yarn passes from the bobbin to the out
let, the threading block having a vertical recess
on each side of the thread channel at the en
trance end thereof, and strips of fur the skin
portions ‘of which are mounted in the aforesaid 1
recesses; and the hair ?laments of ‘which extend
from the skin on each side at a downward in
" clination.
3. In a loom shuttle having a, threading block
mounted in one end thereof and provided with a
e?ectively serve to prevent the ?lling yarn~ NY .I longitudinalthread channel through which the
from being cast out from the‘ entrance end-Jot‘ ?lling yarn passes from the bobbin to the out
the threading block I5 either because’ of the" ‘let, the threading block having a vertical recess
on each side of the thread channel at the en
ballooning of the same, or through an overcast
trance end thereof, and strips of fur the skin
when reversal of movement of the shuttle takes
vportions of which are mounted in the aforesaid
place. Also fouling of overcast loops on horn
recesses and the hair ?laments of which are dis
members l8 and IQ of the threading block l5
posed-eta downward inclination and respective
will be effectively prevented.
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claimz'
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1. In a loom shuttle having a threading block
mounted inone end thereof and provided with
a longitudinal thread channel through which the
?lling yarn passes from the bobbin to the out
let, ‘strips‘of fur mounted at the entrance. end
of the threading block, the hairv?laments of said
ly contact the hair ?laments of the opposite strip.v
4,
a loom shuttle having a threading block
mounted in one end thereof and provided with
a longitudinal thread channel through which
' ?lling yarn passes from the bobbin to the out
fur being disposed at a downward inclination
let, and a strip of fur mounted at the entrance
end of the threading block on at least one side
thereof, the hair ?lament of said fur being dis
and respectively contacting the hair ?laments of
posed at a downward inclination. .
thev opposite strip),
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JOHN J. KAUFMANN, JR.
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