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Патент USA US2129994

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Sept. 13, 1938.
Filed April 14, 1951
4 Sheets-Sheet 1
Sept. 13, 1938.
Filed April 14, 1951
V/ /. l
4 Sheets-Sheet 2
W 7///M
Sept. 13, 1938. I
Filed April 14, 1951
4 Sheets-Sheet 3
Sept. 13, 1938.
Filed April 14, 1931
4 Sheets-Sheet 4
’ jg
Patented Sept. 13, 1938
~William Alexander Dickie, Frank Corbyn Hale,
and William Howarth, Spondon, near Derby,
England, assignors to Celanese Corporation of
America, a corporation of Delaware
Application April 14, 1931, 'SeriaI'NO. 530,018
In Great Britain June 12, ‘1930
3 Claims. (C1. 139—.-232)
The present invention relates to weft-replen
plied to a two box loom with reference to the
ishing looms, i. e., looms in which weft is auto
accompanying drawings, but it is to be under
matically supplied 'on exhaustion. The inven
stood that the following description is given by
tion is particularly concerned with the weft way of example only, and is in no way limitative.
._ replenishment of looms which have a change-box
In the ‘drawings:
" mechanism for the insertion of different kinds
the change-box mechanism, the shuttle maga
_ According to the invention, a weft replenishing
zine, and the shuttle-selecting mechanism;
loom comprises a change-box motion, a shuttle
lolmagazine containing as many kinds of weft as
there are shuttle boxes, and means for replacing
haustion of the weft many of the shuttles. For
Fig. 3 is a further magazine detail;
Fig. v4 is an-end elevation of the loom showing
the detector ‘mechanism;
Fig.5 shows theelectrical circuit of the detec- ].~5_~_
tor mechanism;
Fig. 6 is an end elevation of the loom showing
the means employed for putting ‘the shuttle
example a mechanical or electrical weft detector
changing mechanism into operation;
similar weft are set into operation by means of
suitable feeler mechanism which detects the ex
20.]dGViC6 ‘may be provided for each shuttle and
Fig. '7 ‘is a front elevation of the mechanism_ 20
adapted to set in operation mechanism which
shown in Fig. 6;
removes a spent shuttle from the shuttle-box and
transfers a full shuttle from the magazine to the
box, the selection of the shuttles from the maga
Fig. 8 is a plan of the starting handle and
associated parts shown in Fig. 7;
25 zine being e?ected from the change-box motion,
or even from the feeler mechanism in cases when
each shuttle has its own detector.
The replacement of a shuttle ‘is preferably
carried out with the loom at rest, in order to
avoid danger to the loom mechanism, breakage
Fig. 9 is a plan of part of the mechanism shown
in Figs. 6 and '7;
Fig. ‘10 is an end elevation of the loom showing
the shuttle-changing mechanism; and
Fig. 11 is a plan view of the loom restarting
mechanism'shown in Fig. 9.
Referring to Fig. 1, the two movable shuttle. 30’
of shuttles, or damage to weft or warp.
boxes I2 at one side of the loom are shown as
It is convenient in change-box-looms to detect
the approaching exhaustion of weft in the shuttle
which has just moved out of picking position,
operated by a rod 13 connected to one end of 'a
lever 14 pivoted ‘on a shaft I5 and oscillated by
,since the movement of the shuttle itself can be
'used to bring the weft into contact with the
feeler mechanism. . It is consequently necessary
to delay changing of the spent shuttle until that
shuttle is again picked into the shuttle box on
40 the magazine side of the loom, and the inven
tion therefore comprises means to give the re
quisite delay, which in the case of a two-box
loom has to extend over three picks.
The invention enables weaving on crepe looms
or other looms using two or more diiferent kinds
of weft to be carried out with the advantages
obtainable by the use of shuttle-changing mecha
nism for replenishing the weft. Thus, the weft
is subjected to little stress, either during shuttle
50 changing or during picking, which is partic
ularly important when arti?cial silk .is used as
weft, and there is no danger of the end of weft
in a spent shuttle being drawn into the fabric on
the next pick.
Fig. 2 is an end elevation of the magazine
showing details of the shuttle-releasing mecha- m;
a shuttle whose weft ‘is exhausted by a shuttle
containing the same kind of weft.
The means for effecting ‘the replacement of a
15. spent shuttle by another shuttle containing
Fig. l is an endlelevation of the loom showing
of weft for mixing or other purposes.
The invention will now be described as ap
an eccentric l6 under the control of a Geneva
mechanism H which causes the boxes to be moved 35
up and down after every two picks. The shaft
l5 runs the length of the ‘100m and at the end
remote from the lever l4 carries a- lever I8
which is connected by a link 19- and lever 29' to
a rod 2! carrying a block 22 which is thus 40
caused to rise and fall in accordance with the
movement of the boxes l2.
Mounted above and below respectively the mov
able shuttle boxes l2 are detector devices .23
each comprising a pair of movable metallic 45
plungers .24 adapted .to be pressed against the
yarn on the pirns 25 by the movement of the
boxes l2. Thus, when the boxes are moved up
wardly to bring the lower box to the level of
the shuttle race 26, the upper plungers' .724 are 50v
pressed against the yarn in the ‘upper shuttle.
Similarly, when the boxes are lowered, the lower
plungers 21! are pressed against the vyarn in ‘the
lower shuttle. ‘A plunger of each pair is con
nected by a lead 21 ‘to one terminal'of an elec- 55
tro-magnet 28 and the other plunger of each
pair is connected by a further lead 29 to a battery
30 or other source of current which in turn is
connected by a lead 3| to the other terminal
of the magnet 28.
The pirn tubes may be made of metal, or pro
vided with a metallic strip or other metallic
coating so that on exhaustion of the weft, con
tact is permitted between the pair of plungers
10 24 of any one detector when they are pressed
against the exhausted pirn.
Consequently, the
circuit of the magnet 28 is completed, and this
serves to bring a catch 32 from the position
shownrin full lines in Fig. 5 to the position
15 shown in dotted lines.
The catch 32 and the magnet 28 are mounted
below the shuttle race 26 in such a position that
on the forward movement of the lay the catch
32 passes above a notched block 33 while the
20 magnet remains de-energized. On actuation of
the catch 32 by the magnet 28, the catch is adapt
ed to engage the notched block 33 and so operate
mechanism which stops the loom and sets the
into . operation.
25 Since, however, at the time when weft exhaustion
has been detected that particular shuttle has
moved out of picking position, stoppage of the
loomv has to be delayed until that shuttle is again
picked to the other side of the loom, i. e. after
30 three picks. The lever 34 carrying the block 33
is therefore pivotally mounted at 35 on a bell
crank lever I34 which is operated by a cam I35
to move the block 33 out of the path of the set
catch 32 on the ?rst forward movement of the
35 lay after detection of weft exhaustion, and to
move it again into the path of the catch on the
next pick, the catch of course remaining set by
the continued engagement of the plungers 24
with the exhausted pirn. The other shuttle has
brake arm 60 which in turn is connected by a link
6| through a lever 62 having a lug 63 extending
over the arm 31 of the loom-stopping mechanism.
A bowl 64 on‘ the starting handle 38 engages the
lever 62 on starting of the loom and causes the
lug 63 to rest on the arm 31 to keep the brake
rod raised and the brake band 65 free. When the
loom is stopped by engagement of the rod 36 with
the arm 31 the lug 63 is freed and the brake arm
69 falls under the influence of the weight 66 to
apply the brake. At the same time the cam 56
is rocked and momentarily raises the latch 54
above the projection 58 to permit the counter
clockwise movement of the catch 53 under the
pull of the link 41. It will be seen, therefore, 15
that should the link 41 be pulled at any other
time than when the brake is being applied due to
weft exhaustion, the catch 53 is unable to move,
the lever comprising the parts 49, 50 merely be
ing broken about the pivot 5| against the action 20
of the spring 52.
The catch 53 is adapted during running of the
loom to prevent movement of a lever 61 pivoted
at 68 and tending to move in a clockwise direction
as viewed in Fig. 6 under the action of means 25
to be described later. Release of the catch 53
frees the lever 61 and permits the setting in mo
tion of a shaft 69 which drives the shuttle chang
ing mechanism. The shaft 69 carries a disc 10
facing a further disc 1| loosely mounted on the 80
shaft and driven by gears 12 and a chain drive
13 from the driving shaft 44 of the loom, which,
of course, continues to run even when the clutch
43 is de-clutched on stopping of the loom.
A lever 14 is pivoted across the face of the disc at
16 remote from the disc ‘H and the end 15 of
the lever 14 passes through a hole in the disc 10
and is constantly urged towards the disc ‘H by
means of a spring 16. The disc ‘H has a circular
40 by this time returned to its box l2 and the spent ' series of holes adapted to receive the end 15 of 40
shuttle is picked to the other side of the loom, the lever 14. The spring 16 is prevented from
causing the part 15 to enter the disc ‘H by means
which is then stopped.
To stop the loom, the lever 34 is provided at its of a shoe 11 mounted on one end of a rod 18 con
upper end with an extension 36 which, when the nected by a bell-crank lever 19 and links 80 to
lever 34 is rocked about its pivot 35 by the catch the lever 61. When, however, the lever 61 is re 45
leased by movement of the catch 53, the spring
32, moves an arm 31 to release the starting han
dle 38 from a retaining catch 39. The handle 38
16 is freed from the restraint of the shoe ‘IT and
is then free to spring along the slot 40 to stop forces the part 15 into engagement with the disc
the loom through a link 4| connected to a lever
‘II, so setting the shaft 69 into motion.
42 operating a clutch 43 on the driving shaft 44
The shaft 69 carries three cams 8|, 82, 83 50
of the loom, as shown in Figs. 6 and '7.
adapted (1) to raise the shuttle box front 84 at
Referring now to Fig. 4, it will be seen that the the side of the loom at which shuttle changing
lower end of the lever 34 engages with a pin 45 takes place to, eject the exhausted shuttle by
on one arm of a bell-crank lever 46 whose other
means of the ejector 85 actuated by lifting of the
arm is connected to a link 41. This link is in turn box front, (2) to move the conveyor lever 86 from 55
connected to a lever pivoted at 48 and consisting the position in which the conveyor 81 rests below
of two parts 49, 50 pivoted together at 5| and the magazine 88 to the open shuttle box so as to
connected by a spring 52. Integral with the transfer a shuttle released from the magazine
part 49 is a catch 53 which tends to move in a
to the shuttle box in replacement of the exhausted
counter-clockwise direction by reason of the up
shuttle, and (3) to re-start the loom as will be 60
ward pull of the link 41 caused by engagement described later.
of the lever 34 by the catch 32.
The magazine 88 comprises two chutes 89, 90
The purpose of the catch 53 is to release mech
containing shuttles corresponding to the two
anism whichrwill set the shuttle-changing mech
kinds of weft being laid in the fabric. The shut
anism inroperation, and in order to ensure that tles are retained in position by catches 9| pivoted
this action cannot take place except by reason at 92 at each end of the magazine and project
of weft exhaustion, means are provided to pre
ing through the end walls 93 of the magazine.
vent movement of the catch in any'other circum
stances. For this purpose a latch 54 pivoted at These catches pivotally support levers 94 con
-55 is supported horizontally by a cam 56 which nected by links 95 and bell-crank levers 96 to rods 70
91 projecting laterally from the end of the maga
engages a pin 51 on the latch, and the end of the
latch is arranged to oppose a projection 58 on the zine opposite the rod 2|. The movement of the
catch 53 except for a short instant when the rod 2| in accordance with the movement of the
shuttle boxes l2 moves the block 22 into line with
loom is being stopped due to weft exhaustion.
The cam 56 is connected by a link 59 to the the rod 91 appropriate to the part of the maga 75
zine corresponding to the shuttle which is to be
When the shuttle is exhausted an eccentric 98
on the cam shaft 69 acting through a rod 99,
bell-crank lever I00, link IOI and bell-crank lever
I02, presses a pin I03 on the lever I02 against
the rod 2| and causes the block 22 to strike the
appropriate rod 9'1, so withdrawing the catches 9|
from the ends of the corresponding part 89 or 90
10 of the magazine 88. The lowermost shuttle is
thus allowed to fall to the bottom of the maga—
At the same time a catch I04 on the lever
94 by which the catch 9| is operated enters each
end of the magazine to prevent the remaining
15 shuttles from falling.
On the return movement of the block 22 under
the action of the spring I05 pressing against the
rod 2|, the catches 9| re-enter the magazine and
the catches I04 are withdrawn to allow the re
20 maining shuttles to fall on to the catches 9|.
The shuttle which has been released falls on to
a support I06, being guided thereto by a light
spring blade I0‘I. The support I06 is carried on
an arm I08 pivoted on a shaft I09, and normally
25 closes the open bottom of the magazine 88. The
?rst movement of the conveyor arm 86 to trans
fer a new shuttle to the shuttle box is towards a
stop IIO carried by the arm I08 so as to bring
the arm to the dotted position shown in Fig. 2
30 and to remove the support I06 from beneath the
released shuttle, which thereupon falls on to the
conveyor 81.
The conveyor arm next moves in
free from the influence of the spring ‘I6 has been
pushed towards the disc ‘I0 under the action of
a spring I23 connected to the lever 61. The
lever 61 has also been lowered into position for
re-engagement by the catch 53 which returns
to its original position under the in?uence of
the ‘weight of the link 41 and associated parts.
The shoe 1‘! is thus rendered immovable so that
the tail of the lever ‘I4 is pressed towards the disc
10 and the part ‘I5 of the lever ‘I4 is withdrawn 10
from engagement with the disc ‘I I, with the result
that the shaft 69 is brought to rest.
What we claim and desire to secure by Letters
Patent is:-—
1. In a loom the combination of the lay having 15
shifting shuttle boxes at one end adapted to re
ceive a plurality of alternately active shuttles,
with a ?lling feeler positioned to continuously
feel for ?lling in the inactive shuttle so long as
such shuttle remains in inactive position, an 20
electric circuit closed by said feeler when it de
tects substantial exhaustion of the ?lling supply,
a member normally moving in a ?xed path, a
latch operative to e?’ect a predetermined change
in the operation of the loom, and means includ 25
ing an electro-magnet in the said circuit for es
tablishing an operative connection between the
latch and the said member after the circuit has
remained closed not less than one pick. -
2. A loom comprising a lay having shifting 30
shuttle boxes at one end adapted to receive a
plurality of alternately active shuttles, ?lling feel
the opposite direction, that is towards the shuttle
ers each positioned to feel for ?lling whenvthe
box of the now stationary lay, which has been
35 stopped at back-centre. In the meantime the
cam 8| has lifted the shuttle box front through
a rod I I I and the box front in turn has actuated
the ejector 85 to remove the exhausted shuttle.
The shuttle box is thus free to receive a new
40 shuttle.
The conveyor arm 86 then returns to its orig
corresponding shuttle is in inactive position, an
inal position, the shuttle box front 84 descends
and the loom is ready to be restarted. Means
are preferably provided to release the swell dur
45 ing insertion of the new shuttle and until the
box front has been properly lowered.
Restarting is effected by means of a lever II 2
actuated by the cam 83 and operating a rod II3
having a collar II4 which engages a catch II5
50 pivotally mounted on a tubular member II 6 in
which the rod II3 slides. The member H6 is
connected by a bell-crank lever “1, link II8,
lever H9 and rod I20 to the starting handle 38
of the loom. In the event of the shuttle box
55 front not being correctly lowered to close the
shuttle box, as in the case of improper transfer
of the new shuttle from the conveyor to the
shuttle box, the rod III is prevented from rising
to its proper position, and a pin I2I carried by
60 the rod remains in engagement with the tail I22
of the catch II5 to prevent the catch from being
engaged by the collar II4. Thus the connection
between the rod I I3 and the starting handle 38 is
broken, and the loom cannot be restarted.
The various operations just described are car
ried out during one revolution of the shaft 69.
Towards the end of this revolution, the tail of the
lever ‘I4 employed to clutch together the discs
‘I0, ‘II is carried beneath the shoe 11, which being
electric circuit closed by either of said feelers 35
when it detects substantial exhaustion of ?lling
supply in a shuttle, an electro-magnet included
in said circuit, a latch operable by the electro
magnet, a member normally moving at alternate
picks into and out of the vicinity of the latch, 40
means controllable by said member to effect a
predetermined change in the operation of
loom, and means controlled by the beat of
lay to bring the member into position for
erative connection to be established between
the 45
latch and the member after the circuit has been
closed not less than one pick.
3. A loom comprising a lay having shifting
shuttle boxes at one end adapted to receive a
plurality of alternately active shuttles, ?lling feel 50
ers each positioned to feel for ?lling when the
corresponding shuttle is in inactive position, an
electric circuit closed by either of said feelers
when it detects substantial exhaustion of ?lling
supply in a shuttle, an electro-magnet included 55
in said circuit, a latch carried by the lay and
operable by the electro-magnet, a member mount
ed independently of the lay and normally moving
at alternate picks into and. out of the vicinity of
the latch, and means controllable by said member
to effect a predetermined change in the operation
of the loom, the beat of the lay serving to estab
lish operative connection between the latch and
the member after the circuit has been closed not
less than one pick.
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