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Патент USA US3025897

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March 20, 1962
H. N. THIBAULT
3,025,888
REPLENISHING MECHANISM FOR LOOMS
Filed March 1, 1960
INVEN TOR.
HARRISON N. THIBAULT
A TTORNEY
United States.
atet
”
3,025,888
Patented Mar. 20, 1962
1
2
3,025,888
being biased by a spring means in a direction to maintain
a minimum opening and maximum amount of taper.
REPLENISHING MECHANISM FOR LOOMS
Harrison N. Thibault, Hopedale, Mass., assignor to Draper
Corporation, Hopedale, Mass., a corporation of Maine
Filed Mar. 1, 1960, Ser. No. 12,073
4 Claims. (Cl. 139-—257)
This invention relates to looms for weaving, and, in
particular, to an automatic bobbin replenishing mecha
nism.
It is the general object of the invention to provide an
improved extractor assembly effective periodically in
timed relation with the transfer mechanism of the loom
‘automatically to remove and retain the ?lling or tip bunch
from bobbin ends.
It is a more speci?c object to provide an extractor as
sembly of the type which is movable over the end of a
bobbin to be transferred to remove and retain a ?lling
This manner of selectively varying the size of the open
ing permits the use of a relatively weak spring means
so that as the jaws are moving into position over a bobbin
end, the rotatable jaw is easily displaced thereby elim
inating the possibility of displacing or damaging the tip
bunch. As the jaws are moved outwardly to remove the
bunch from the bobbin end, the forces exerted against
the rotatable jaw act in a direction to urge that jaw
inwardly against the bobbin rather than outwardy as in
the case of a pivotally mounted jaw, thereby assuring
removal of the bunch regardless of how tightly it may
be wound.
Further objects and advantages will become apparent
from the following detailed disclosure.
FIG. 1 is a plan view of the extractor assembly.
bunch therefrom which eliminates any possibility of dam
FIG. 2 is a side elevational view of the mechanism
shown in FIG. 1.
age to or displacement of said bunch during entrance of
that assembly over that bobbin.
sembly.
It is a further object to provide an extractor for re
moving and retaining the tip bunch from bobbins so
equipped which extractor comprises a pair of jaw mem
bers de?ning a tapered opening therebetween, one or
both of said jaw members being rotatably mounted where
by the size of the opening may be increased as the ex
tractor moves into position over the next bobbin to be
transferred and then decreased to approximately the di
ameter of the bobbin end prior to engagement of the
bunch by the extractor as the latter moves in the opposite
direction upon an indication for transfer.
Recently extractor mechanisms have been disclosed for
removing a tip bunch from bobbins ends of a type which
FIG. 3 is a front elevational view of the extractor as
FIG. 4 is a View on a slightly enlarged scale illustrat
ing a portion of the mechanism shown in FIG. 1 and
with added details illustrating the extractor jaws.
FIG. 5 is a plan view of a modi?ed form of the device.
FIG. 6 is a perspective view of one of the extractor
jaws de?ning the tapered opening.
Referring to FIG. 1, an extractor arm 10 pivoted to
swing toward and away from the end of a bobbin to be
transferred acts as a mounting means for the extractor
assembly attached to it by use of a stud 11 or any other
suitable means of mounting. This extractor mechanism
is designed for removing and holding the tip bunch 12
for at least one complete pick of the loom. The con
include a pair of jaw members mounted on a reciprocable 35 struction comprises a pair of jaw members 13 and 14
support which is movable in one direction over the end of
which are assembled at the lower end of spindles 15 and
a bobbin to be transferred and which upon an indica
16 and adjacently assembled in base member 17 as illus
tion from the transfer parts of the loom, is movable in
trated in FIG. 2. The base member 17 at its upper ex
the opposite direction to remove the bunch, the ?lling end
tremity has a laterally extending portion 18 which houses
of the transferred bobbin being maintained taut in any 40 a spring loaded pin 19 the force of which is constantly
suitable manner such as by a suction tube. One of the pair
acting in a direction to rotate the actuatable member
of jaw members is usually ?xedly mounted while the
20 which is a?ixed to the upper end of spindle 16. From
other is pivotable and bodily movable toward and away
the laterally extended portion 18 of base member ‘17
from the ?rst to vary the size of the opening therebetween,
there is a pivotally mounted clamping plate 21 of channel
a spring member being employed to urge the pivotable 45 section having a pair of side members 22 and 23 formed
jaw toward the other. A relatively strong spring is re
along the sides thereof and a button-like protrusion 24
quired in order to prevent outward movement of the
on its face at the lower part of said plate whereby it is
pivotable jaw during removal of the bunch. On the other
enabled to ?t partially into the opening 25 formed by
hand excess spring tension acting upon the jaws could re
the inner contour of jaw members 13 and 14.
sult in undesirable displacement of the bunch toward the 50
A coil spring 26 tends to urge the clamping plate 21
main body of ?lling as the jaws move into position over a
in the direction of the jaw members, the entire assembly
bobbin or in the alternative the excess tension could in
jure the bunch or sever the connecting thread between
the main body of ?lling and the bunch. Additionally, if
of which is mounted on the extractor arm 10 illustrated
in FIGS. 1 and 3. A pin 27 is ?xedly positioned to pro
ject laterally from the clamping plate 21 as shown in
a relatively weak spring is utilized, upon a call for trans 55 FIGS. 1 and 2 ‘and serves as a means for maintaining
fer the jaws could ride over a tightly wound tip bunch
the clamping plate 21 out of engagement with the ex
Without effecting removal thereof so that the transfer
tractor jaws when the latter are in position over a bobbin
would take place without the ?lling end being held in
28, as shown by dotted lines in FIG. 3, but which pin
which case a ?lling stop would take place.
releases that plate as soon as the extractor on indication
According to the present invention, both of the jaw 60 for transfer, swings outwardly to removed the tip bunch
and then assumes that position illustrated by full lines
in FIG. 3. The mechanisms for actuating the clamping
plate by means of pin 27 and for swinging the extractor
members are relatively ?xed with respect to each other
and de?ne ‘a tapered opening therebetween which in
creases in the direction of the bobbin over which it is to
be inserted. At least one of the jaws is rotatably mount
ed so that the size of the opening and the angle of taper 65
are not novel features of this invention and for a com
may be periodically varied during the replenishing cycle,
this variation being possible due to the offset mounting
January 8, 1960.
of the jaw on its reciprocable supporting axis or spindle.
assembly outwardly by means of the extractor arm 10
plete and detailed description of these mechanisms refer
ence is hereby made to ‘application No. 1,201, ?led on
The jaw members 13 and 14 are ?xed relatively to
The opposite end of the spindle has an actuatable mem 70 each other and form a tapered opening therebetween.
ber attached thereto which is adapted to effect the
At least one of these jaws is rotatably mounted the other
periodic oscillation of the spindle, that member further
being ?xedly positioned by means of a pin 28 assembled
aoaaaaa
9
(3
While one embodiment and a modi?cation of the in
vention have been disclosed, it is to be understood that
the inventive concept may be carried out in a number
of ways. This invention is therefore, not to be limited
to the precise details described, but is intended to em
brace all variations and modi?cations thereof falling
within the spirit of the invention and the scope of the
claims.
I claim:
through base member 17 and spindle 15. If so desired,
both jaw members can be easily made to rotate by simply
removing pin 28 and adding an additional actuatable
member 2 ’ to spindle 15 ‘as noted in FIG. 5.
FIG. 5
shows both extractor jaws in a rotated position wherein
the opening therebetween has been enlarged while FIG.
4 illustrates one of said jaws in a ?xed position and the
other being in a slightly rotated position. In FIG. 6
extractor jaw 13 is shown perspectively to de?ne the
tapered opening portion 113’ incorporated in both of said
jaws.
When the extractor assembly swings back into position
over the next bobbin to be transferred after removing
the tip bunch from a transferred bobbin, the extractor jaw
14 is rotated approximately 15 to 20 degrees outwardly
of the loom or away from the bobbin tip as shown in
10
1. A ?lling bunch extractor for removing the ?lling
bunch from the end of a ‘bobbin to be transferred to a
shuttle and for retaining the ?lling end while the shuttle
is picked which comprises a gripping means including a
pair of jaw members de?ning an opening therebetween,
an oscillatable spindle, at least one of said jaw members
being formed as an endwise extension of said spindle,
FIG. 4, thus enlarging the opening between said jaws
said opening being directed substantially perpendicular
allowing them to ride over the end of the bobbin 2.8 and
the tip bunch 12. with ease. Extractor jaw 14 is rotated
by any suitable means ?xedly positioned on the loom, for
to the spindle for e?ecting periodic oscillation thereof.
example, a striker pin 3i), FIG. 4, acting upon the extend
ing lug 2.9 of actuatable member 29 in such a manner
as to force spring loaded pin inwardly of the extended
portion 18. In timed relationship with this motion, the
clamping plate 21 is pivoted to the position illustrated
by dotted lines in FIG. 3. The extractor jaw and clamp
ing plate retain these positions until an indication for
replenishment is made after which time the extractor
to said spindle.
2. The mechanism of claim 1 wherein means is ?xed
3. For a loom for weaving wherein bobbins are em
ployed having ?lling wound thereon an end of which is
wound in the form of a tip bunch adjacent the bobbin
end, a combined means for removing the bunch from
bobbin ends and for disposing of it and retaining the
?lling end while the shuttle is picked which comprises
a pair of gripping members de?ning a tapered opening
therebetween, 'one of said gripping members being ?xed
jaws start to move outwardly and assume a minimum
to one end of a spindle and the other of said gripping
further outwardly of the loom for the purpose of remov
jacent thereto, and means ?xed to the opposite end of
ing the tip bunch 12, the clamping plate 21 is released to
allow the button-like protrusion 24 to enter the opening
between the extractor jaws as said jaws clear the tip of
the bobbin. As this button-like protrusion enters the
tion thereof.
4. The mechanism of claim 3 which includes a. clamp
ing member e?ective to retain said bunch after its re
opening therebetween. As the extractor assembly swings 30 members being ?xed to one end of a second spindle ad
jaw opening it clamps and holds the newly removed tip
each spindle for effecting simultaneous periodic oscilla
moval from said bobbin end, said clamping member be
ing biased toward'said gripping members.
bunch for a predetermined period of time. This latter
is also explained in application No. 1,201, ?led on Jan
References Cited in the ?le of this patent
uary 8, 1960.
UNITED STATES PATENTS
While the extractor assembly has been disclosed ‘as be 40
ing adapted for use with a swinging mounting means as
shown in application No. 1,201, it is to be understood
that the assembly may be used with a mounting structure
of the type which moves along a line forming a continu
ation of the axis of the bobbin to be transferred. Move
ment of the extractor assembly may further be effected
either mechanically or by pneumatic means.
1,039,547
1,053,123
1,256,251
Koechlin ____________ __ Sept. 24, 1912
Diedericks __________ __ Feb. 11, 1913
Osgood et al. ________ __ Feb. 12, 1918
7,424
Great Britain ____________ __ of 1910
FOREIGN PATENTS
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