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Патент USA US2098444

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Nov. 9, 1937;
‘2,098,444
T. c. WAGNER
MECHANICAL WARP STOP MOTION
Filed Oct. 50, 1955
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Nov. 9, 1937.
2,098,444
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Filed Oct. 30, 1935
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ATTORNEYS
NOV. 9, 1937.
T_ v<1 WAGNER
2,098,444
MECHANICAL WARP STOP MOTION
Filed Oct. 30, 1935
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ATTORNEYS
NOV. 9, 1937.
T_ c, WAGNER
2,098,444
MECHANICAL WARP STOP MOTION
Filed Oct. 30, 1935
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INVENTOR.
77/150,002 C’. l/l/?a/vza
BY
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ATTORNEYS
Nov. 9, 1937.
2,098,444
T. c. WAGNER
MECHANICAL WARP STOP MOTION
1
Filed Oct. 30, 1955
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INVENTOR.
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BY
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ATTORNEYS
Patented Nov. 9, 1937
UNETE
'
STS
P,
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2,098,444
MECHANICAL WARP STOP MOTION
Theodor Curt Wagner, Chemnitz, Germany
Application October 30, 1935, Serial No. 47,347
In Germany June 24, 1935
8 Claims. (01. 139—360)
This invention relates to looms, and refers then locked by the fallen heddle and in their locked
more particularly to a mechanical harness warp position continue their common up and down
stop motion for looms.
movement until they nearly reach their upward
An object of the present invention is the pro- position, whereupon through the medium of other
vision of a warp stop motion device which is sim-
elements they actuate a device which is oper- 5
ple in construction, can be easily adjusted and
can be easily kept under observation.
Another object is the construction of a warp
stop motion provided with heddles or drop wires
atively connected with the knock-out mechanism
of the loom. This impact between the element or
elements operated by the bars and the device op
eratively connected with the knock-out mecha
10 and serrated bars which are not subjected to any
substantial or excessive stress.
A further object of the present invention is
nism does not take place if the spring mechanism 10
is able to cause the return movement of the ser
rated bar, due to the absence of a fallen heddle.
the provision of a mechanical warp stop motion,
In cotton looms, wherein drop wires are used,
the heddles or drop wires of which can be moved
the frame carrying the serrated bars remains
15 along the serrated bars so that the harness may
be conveniently strung up and new heddles may be
easily added to the harness hanging in the loom.
stationary, while the device operatively connect~ 15
ed with the knock-out mechanism carries out an
up and down movement relatively to the frame.
The above and other objects of the present inIn order to provide for a quick and convenient
vention may be realized through the provision of removal and replacement of the serrated bars, the
20 a mechanical harness warp stop motion compris— tubular bar is mounted in resilient supports which 20
ing a pair of serrated bars which carry out a com- are attached to the harness frame but which may
mon up and down movement while the heddles be easily moved whenever a serrated bar is to
of the harness are reciprocated in the same di- be taken out. The resilient supports are pro
rection. One of these bars is movable lengthwise vided with. means locking the serrated bars in
in the direction of its longitudinal axis relatively their operative positions.
'
25
to the other bar by a swinging mechanism which
The device actuated by the impact with ele
is actuated by a device independent of and sepa- ments operated by the serrated bars while said
rate from the mechanism causing the up and bars are locked by a fallen heddle, is operatively
down movement of the bars. The lengthwise connected with the knock-out mechanism of the
3g movement of one of the serrated bars takes place loom by a ?exible cable movable within a stiif 30
when the two bars and the heddles are in the tube.
lower shed, i. e. in their lower position.
The invention will appear more clearly from
The two serrated bars preferably have the
form of a rod situated within another tubular rod.
35 The teeth of the two bars are so disposed that
the following detailed description when taken in
connection with the accompanying drawings,
when one of the bars is rotated from its operative
showing by way of example preferred embodi- 35
ments of the inventive idea.
position to an inoperative position, through an
angle of 180°, the teeth of the two bars will not
project beyond their Operative Surfaces Which are
40 adapted to carry heddles falling upon them after
In the drawings:——
Figure 1 is a diagram illustrating a loom.
Figure 2 is a front view of the harness stop mo-.
tion and the knockout mechanism constructed in 40
theIrrespectrve
breallase of
the Warp thl‘eaéisof the time at which a warp
thread
has been broken and a heddle has fallen down
upon the serrations of the two bars, the up and
45 down movement of the bars is continued until
the bars have practically completed their next up
ward movement, whereupon the stop motion de
vice is automatically actuated. This feature is
accomplished by providing serrations of such
5O shape that one of the serrated bars is moved
lengthwise by the swinging mechanism even if a
heddle has already fallen upon the bars.
On the
other hand, the return movement of that bar,
which is caused by a spring mechanism, is pre35 vented by the fallen heddle. The two bars are
accordance with
the principles of the present in
'
Vention.
Figure 3 is a side elevation of the device operat
ing the knock-out mechanism on a larger scale.
Figure 4 shows a portion of the serrated bars 45
in operative position and adjacent elements.
Figure 4a is a perspective view of one of the
ends of a tubular senta'ted bar‘
,'
Figure 5 15 9* Sectlon along the lme 5_5 of 50
Figure 4-
_
Figure 6 is a section along the 11118 6-6 of
Figure 4-
'
.
Figure 7 is similar to Figure 4 and shows the
device in its inoperative position.
55
2,098,444.
2
Figure 8 is a section along the line 55-45 of
Figure 6.
Figure 9 is a front view of a part of the knock“
out mechanism.
Figure ll) is a perspective view of the warp
stop frame shown in Figure 2.
The tubular bar 42 is provided with two pro
j-ections 43 situated diametrically opposite each
other which ?t into suitable recesses 44 formed
in the adjacent surfaces of the annular member
Figure 11 shows a heddle carrying a thread.
Figure 12 is similar to Figure 11 and shows a
heddle, the thread of which was broken.
10
Figure 13 shows a harness stop motion of a
somewhat different type; and
Figure 14 is a section along the line 54-44 of
Figure 13.
Figure 15 is a front view of a stop motion ac
15
tuated by drop wires.
Figures 16, 1'7 and 13 show drop wires and
serrated bars operated thereby.
The loom illustrated diagrammatically in Fig
3'5 (Fig. 4a) .
Similar projections 33 ?t into re
I21
cesses formed in the annular member 38 (Fig. 2).
Due to this arrangement, the tubular bar 42 is
held between the annular members 31 and 38
and is prevented from being unintentionally
10
turned or rotated.
The tubular bar 42 is provided with a round
end portion 45 and a cut-out serrated portion 46
which comprises a plurality of teeth 41 (Figs. 4,
5, 7 and 8). A curved edge surface 48 connects
the serrated portion 46 with the end portion 45.
Each of the teeth 41 comprises an abruptly in~
clined substantially vertical surface 49 and an
oblique surface 58 forming a comparatively sharp
acute angle with a horizontal plane.
The bar 4 l, the middle portion of which is situ 20
ated within the tubular bar 42, comprises a
ure 1 of the drawings comprises a warp beam 55,
a breast beam Eli and cloth roll ii. The warp
threads l8 pass through healds or heddles it’ tapered end 55, a round portion 52 and a ser
carried by two harness ‘frames or warp stop
' rated portion 53. As shown in Figures 4 and '7,
frames I9. Only one of the two frames E9 is
the serrated portion 53 of the bar 4! comprises
illustrated in Figures 2 and if) of the drawings.
» , The frames M are reciprocated in the usual man
ner by treadles 52 which are actuated by the
plates ii and which move on fulcrum pin we.
The frames is are connected to the treadles !2
by straps or cords
passing over rollers 9 (Figs.
30 1 and 2).
As shown in Figures 2 and 10, a harness frame
I9 is provided with longitudinally-disposed bars
28 and 2! which are held by two brackets 22 and
23 (Figure 2).
The loom frame comprises a vertical bar 24
110 CR
carrying a horizontally-disposed bracket 25 which
is attached to the bar
by a bolt 2'5 and which
is provided with a horizontal slot 2'5. A guide
member or a bolt 23 is situated within the slot 2'!
and is used as a
which is
contact with
40. the bracket
during the up and down motion
of the frame iii caused by the treadles l2.
A similar guide member '29 is situated on the
opposite side of the harness frame is and is in
contact with the bracket ‘23.? of this frame. The
45 guide member 29 is situated within a slot 38
of a bracket
which is attached to another por
tion of the loom frame not shown in the drawings.
_A bent resilient support
is attached to the
bracket 23 substantially
the middle thereof.
50 A similar resilientsupport 3'3 is situated oppo~
site the support 32
is attached to the bracket
22. The two resilient sup
to 32 and
extend
substantially vertically and their lower ends
carry a supporting wire
which extends across
the warp stop frame
in the
izontal direction.
The upper ends of the resilient supports 32
and 34 are firmly connected with annular support
ing members El and
60
respectively.
As shown
more clearly in Figures 4 and 7 of the drawings,
the annular member 3? is truly connected with
the upper end of the resilient support 32 and is
provided with a central opening
The end
of the resilient support 32 has a similar open65 ing 48.
A serrated bar
extends through the open~
ings 39 and 4d of the annular member 3'? and
the support
as well as through. an opening
formed in the bracket
The bar Fri extends
also through similar openings formed in the an~
nular member
the upper end of the resil' -.
support 34 and the bracket ‘2.2. The two annular
members Bl and
are in contact with a tubular
serrated bar 42 which surrounds the serrated
75
the teeth 54. Each of these teeth is provided
with an abruptly inclined substantially vertical
surface 55 and an oblique surface 56 forming a
sharp acute angle with a horizontal plane. As
shown in Figure 4, the teeth 54 of the bar 4|
extend in a different direction from the teeth 41
of the tubular rod 42, so that the abruptly in
clined substantially vertical surface 49 of one
of the teeth 41' is situated adjacent a similar sur
face 55 of one of the teeth 54. Due to this ar
rangement, a space 51 is formed between each
pair of adjacent teeth 41, 54. The spaces 51 re
ceive the heddles l3 which drop down into them
as will be described hereinafter.
As shown in Figures 2 and 10, the smooth
end 58 of the bar 4| passes through a suitable 40
opening formed in the bracket 22 and projects
beyond this bracket. The opposite tapered end
M of the rod 4| is in contact with an angular
lever 59 (Figs. 2, 4 and 7). A pivot 60 (Fig. 2)
which carries the lever 59 is supported by a
bracket 6|, which is carried by the bracket 23
of the frame I9. The lever 59 is provided with
a bent portion 62 having an end 63 which is
in contact with the adjacent surface of the
bracket 23 (Figs. 4». and '7). The lever 59 is main
tained in the position shown in full lines in Fig
ure 2 by a leaf spring 63 which is attached by bolts
or rivets 64 to the bracket 23.
Two ?at springs 65 are situated on opposite sides
of the bent portion 62 of the lever 59 and are
suspended therefrom by the pin 66. As shown
more clearly in Figure 6, each of the springs 65 is
situated in a separate cavity or cut-out portion 61
which is formed in the bar 4!. The edges 68 of
the springs 65 are in engagement with the edges 60
69 of the cut-out portions 61 of the bar 4| (Figs.
e and '7). Due to this arrangement, the serrated
bar M is ?exibly connected with the lever 59 and
at the same time is prevented from being uninten
tionally turned or rotated.
65
The lengthwise reciprocating motion of the bar
4! in the direction of its longitudinal axis is car
ried out by means of a cam 10 which is adjustably
mounted upon the crank shaft ‘ll (Fig. 2). The
device for driving the crank shaft ‘H is of the To
usual type and is not shown in the drawings.
Due to the fact that the cam 10 may be ad
justed relatively to its shaft ‘II, it is possible to
vary the time during which one of the serrated
bars is moved relatively to the other bar by the
2,098,444
pendulum lever 15, described hereinafter. While
it is customary to carry out such movement at the
lower shed position, it may take place either be
fore or after the frame I9 reaches the lower shed
position.
As shown in Figure 2, the cam ‘I0 is provided
with a raised surface ‘I2 which is in engagement
with a roller ‘I3. The roller ‘I3 is rotatably mount
ed upon a pin T4 of a pendulum lever ‘I5, the upper
10 end of which is oscillatably mounted in a pin ‘I6
carried by the support 11.
The support 17 is
3
return movement of the bar 4| in a direction op
posite to that of the arrow 85 can take place
only until the fallen heddle is clamped between
the surfaces 49 and 55 of two adjacent teeth 41
and 54. As soon as the fallen heddle I3 is perma
nently clamped between these teeth, any further
return movement of the bar 4| is prevented.
As has been mentioned, already, the length
wise movement of the serrated bar 4| takes place
when the frame I9 is in its lower position. The 10
frame I9 is moved vertically upward from that
attached by rivets 78 to the horizontal beam ‘I9,
position in the direction of the arrow 85 (Fig. 2)
constituting a part of the frame of the loom and ~ by
the treadles I 2.
connected with the vertical bar 24.
The pendulum lever ‘I5 carries a plate 89 which
is provided with a horizontal slot 8| . A spring 84
connects the lever ‘I5 to the frame of the loom. A
bolt 82 which holds the plate 80 in place upon
the lever ‘F5 passes through the horizontal slot 8|
of the plate 89 and is also passed through the
vertical slot 83, formed in the lever ‘I5. Due to
this arrangement, the plate 80 is adjustable upon
the lever ‘I5, both in the vertical and horizontal
directions.
25
'
As shown in Figure 2, a lever 8’! is situated ad
J'acent the bracket 23 of the frames I9 and is ro 15
tatably mounted upon a pivot 88 carried by the
support 89. The position of the lever 81 in-rela
tion to that of the frames I9 should be such that
the lever 87 cannot be actuated by the ends of the
frames. The support 99 is provided with a verti 20:
cal slot 99 and is held in position upon the brack
et 25 by a bolt 9| which passes through the verti
cal slot 99 of the support 89 and the horizontal
slot 21 of the bracket 25. Due to this arrange
The device for moving the serrated bars op
ment, the position of the'support 39 relatively to‘ 25
erates in the following manner:-—
The swinging movement of the lever 15 caused the reciprocating frames I9 may be adjusted both
by the cam 12 (Fig. 2) is timed in such manner in the vertical and horizontal directions.
The lever 8'1 is provided with an ear 92 which
in relation to the up and down movement of the
frame I 9 caused by the treadles I2 (Fig. 1), that is ?rmly connected with an end of an armored
the plate 89 strikes the end 58 of the serrated bar cable 93 situated within a sheath 94, the upper 30
4| when the frame I9 carrying that bar 4| is in end of which is carried by a support 95, consti
tuting an integral part of the support 89.
the lower shed. The bar 4| is moved in the direc
The knock-out mechanism is illustrated in
tion of the arrow 85 shown in Figure 2, within the
tubular bar 42. A heddle I3 which may have _ Figure 2, and on a larger scale in Figures 3 and 9
fallen upon the teeth of the bars 4| and 42 due to of the drawings. This mechanism may be oper
the breakage of a warp thread, cannot prevent ated automatically by the cable 93.
The end of the sheath 94 which is nearest the
this movement, because the shape of the teeth 41
and 54 is such that no locking of the bars 4| and knock-out mechanism is firmly held by a clamp 95
(Figs. 3 and 9). The clamp 99 is attached by
42 can take place when the bar 4| is moved in
the bolts 91 to a support I97 constituting an in
that direction.
The heddles I3 are illustrated on a larger scale tegral part of a bracket 98 which is riveted upon
in Figures 10 to 12 of the drawings. Each of the the stop spring 99.
As shown in Figure 2, the stop spring 99 is of
heddles I3 comprises an upper eye I 3a., through
45 which the serrated bars 4| and 42 are passed, a
standard construction and carries a rod 99a op
lower eye I31; through which passes the wire 36, erating a clutch (not shown) which is connected
and an intermediate eye I30 carrying a warp with the mechanism driving the loom. In the op
erative position shown in the drawings, the mem
thread I8.
The heddles I3 are reciprocated along with their ber 99 is held in a recess against the in?uence of
frame I9. However, due to the elongated form its spring which is bent in that position. In order
to stop the loom the stop spring 99 is moved out
of the eyes I3a and I32), there is a relative move
ment of the heddles I3 in relation to their frame of its recess either manually or by the automat
I9 in the course of the up and down movement of ically operable device described hereinafter.
the latter. The position of a heddle I3 relatively Then the member 99 will swing under the in
to the bars 4| and 42 and the wire 39 at the lower ?uence of its spring and the rod 99a will disen
gage the clutch, thereby stopping the loom.
shed is illustrated in Figure 11. In that posi
The end I99 of the cable 93 is ?rmly connected
tion the wire 36 is situated in the lower end of the
with a slide I9I carrying a bolt I92 which presses
eye I3b while the bars 4| and 42 extend approxi
mately through the lower part of the eye I 3a. against the end portion I99 of the cable 93 (Figs.
Should the warp thread I8 break at that time, 3 and 9). The locking pin I93 is slidably mounted
the heddle I3 will fall upon the serrated bars 4| in a guide I95 which constitutes an integral part 60
and 42. This is illustrated in Figure 12 of the of the bracket 98.
The support I91 which constitutes an integral
drawings.
The bar 4|, when moved in the direction of the part of the bracket 98 is provided with an open
(55 arrow 85, will press with its end 5| against the
ing through which passes the lower end of the
bent lever 59, causing the lever to assume the locking pin I 93. A coil spring I99 surrounds the 65
pin I03. The lower end of the spring I 98 presses
position shown by broken lines in Figure 2,
As soon as the cam surface "I2 is moved out of against the upper surface of the support I01,
contact with the roller ‘IS, the pressure of the plate while the upper end of the spring I99 presses
99 against the end 58 of the bar 4| ceases so that against the slide I III which is slidable along the
the bar 45 has the tendency to move back into its bracket 99 and which is ?rmly connected with the
original position under the influence of the spring locking pin E03 by means of the bolt I94. Due to 70
63 which presses against the angular lever 59. this arrangement the spring £98 presses the pin
If, however, a fallen heddle I3 happens to lie upon I09 against the cam surface I99 of a bracket II9.
vi the teeth 47 and 54 of the bars 4| and 42, the
The bracket I I9 is provided with two bore holes
situated one above the other and extending at
75
2,098,444
4
right angles one to the other. A shaft III is sit
uated in the upper bore hole of the bracket H0.
The bracket H0 is suspended from the shaft III
and may swing around said shaft. The frictional
is moved from the position shown in Figure 4 to
the position shown in Figure '1.
It will be noted that no screws or similar con
necting means are to be loosened and tightened
engagement between the shaft III and the ad
jacent walls of the bracket IIO may be adjusted
by means of bolts II2 which are screwed into
threaded openings formed in the bracket I I0 and
which press against the shaft III.
10'
The lower bore hole of the bracket III! carries
the knock-01f pin I I3 which is ?rmly held in the
up again for this operation. Furthermore, the
?at springs 65 will prevent the bar 4| from being
unintentionally rotated further than through an
angle of 180°.
As shown in Figures 7 and 8, in the inoperative
position the teeth 54 of the bar 4| are covered 10
by the adjacent portions of the tubular bar 42,
while the smooth, round surfaces of the bar 4|
bracket IIO by means of the bolts I00. The end project beyond the teeth 41 of the bar 42.
II4 of the knock-off pin II3 carries a weight II5
Instead of turning the serrated bar 4 I, the same
whichis attached to the knock-01f pin I I3 by the result may be attained by rotating the serrated
tubular bar 42 through an angle of 180°. This
15 pin H6. The opposite end II1 of the pin H3 is
free and in the operative position of the device rotation may be carried out by pressing the upper
which is shown in full lines in Figure 3, is situ
end of the spring support 32 against the bracket
ated underneath the lay II8 which is carried by 23 of the frame I9 until the projections 43 are
the lay sword I I9.
released out of the recesses 44 of the member 31,
The knock-out mechanism is operated as fol
moving the bar 42 toward the bracket 23 and then
turning it by hand. Since the two projections 43
lows:
When one of the frames I9 is moved upwardly co-operating with the corresponding recesses 44
in the direction of the arrow 86 by the treadles are situated diametrically opposite each other,
I2, its angular lever 59 passes alongside the lever the projections 43 will snap into the recesses 25
81,
provided the lever 59 is situated in the position 44 after the tubular bar 42 has been rotated
25
shown by full lines in Figure 2. If, however, a through an angle of 180°, thereby preventing fur
heddle I3 is clamped between the teeth 41 and 54 ther unintentional rotation of the bar 42.
of the bars 4| and 42, the bar 4I will be pre
If it is desired to remove heddles I3 or to insert
vented from returning to the position shown in them on the right side of the frame I9 (looking 30
in the direction of Figure 2) the serrated bar 4|
30 full lines in Figure 2, with the result that the
angular lever 59 will be maintained by the bar 4|
or the serrated tubular bar 42 is turned through
in its displaced position shown by broken lines an angle of 180° and then the bar M is liberated
in Figure 2. 'If the lever 59 is maintained in this from its gripping contact with the two ?at springs
deviated position, it will strike an end of the 05. Then the bar 4| is moved toward the left 35
until the serrated tubular bar 42‘ can be liberated
35 lever 81 in the course of the upward movement of
the frame I8, thereby swinging the lever 81 up
by pressing back the spring support 32, thereby
wardly around its pivot 88. The lever 81 will pull enabling an insertion or removal of the heddles.
the cable 93 in the course of this swinging move
ment.
40
As shown more clearly in Figure 3 of the draw
ings, the cable 93 is ?rmly connected with the
sliding member IOI which in its turn is ?rmly
connected with the locking pin I03. The move
ment of the cable 93 in the direction of the arrow
45 80 shown in Figure 2 will cause a movement of the
sliding member IOI in the direction of the arrow
I20 shown in Figure 3. The slide I0 I , when mov
ing in this direction, will compress the coil spring
I08 and will pull the end I2I of the locking pin
50 I03 out of engagement with the abutment I22
provided in the cam surface I09 of the swinging
a cross beam |3| and a vertical support I32. The
bracket IIO.
As soon as the bracket H0 is freed, the weight
I I5 will swing the bracket I I0 around its pivot l I I
55 until the knock-off pin II3 assumes the position
shownbybrokenlinesin Figure 3. In this position
the knock-off pin H3 is situated within the path
of movement of the thrust plate I23 carried by
the lay H8.
The lay IIO in the course of its
60 next movement toward the stop spring 09 will
cause the thrust plate I23 to strike against the
end portion II1 of the knock-off pin H3. The
stop spring 99 will leave its recess under the force
of the blow imparted by the plate I23 and will
65 move to its inoperative position, causing the
member 99a to disengage the main clutch, there
by stopping the loom.
If, while the loom is at a standstill, it is de
sired to string up a harness or to remove some
70 heddles, the projecting end 58 of the serrated
bar 4| is rotated manually through an angle of
180°. No tools are required for this purpose, since
the end 58 of the bar 4| may be conveniently
grasped by the hand of the operator. By rotating
75
If the same operation must be carried out on
the left side of the frame (looking in the direc 40
tion of Figure 1), the serrated tubular bar 42 or
the serrated bar 4| is rotated in a similar manner
and then the bar 4| is drawn to the left until
the angular lever 59 can be slightly turned about
its pivot 60, whereupon the bar 4| is drawn so far 45
to the right that the serrated tubular bar 42 can
be removed from the spring support 34. As soon
as this‘ has been accomplished, heddles can be
conveniently inserted into or removed from the
left side of the frame.
The device illustrated in Figures 13 and 14 of
the drawings comprises a frame I30 provided with
the bar 4| through an angle of 180°. the bar 4|
frame I30 is substantially similar in form to the
frame I0 (Figure 2), only a part of the frame I30 .
being illustrated in Figure 13. The frame I30 car
ries a pair of supporting springs I33, each of
which carries a separate tubular holding member
I34. Only one of the two springs I33 is illus
00
trated in Figure 13.
The members I34 are in contact with a tubular
serrated bar I35 which is provided with teeth
I36. A serrated bar I31 which is situated within
the tubular bar I35 is provided with teeth I38.
The frame I30 carries a bail I39 which is mov
able in the direction of the arrow I51 and which
is ?rmly connected with a pin I40 carried by a
support I4I attached to the beam I3I. The pin
I40 is movable in the direction of its longitudinal
axis along with the bail I39.
The slidable bail I39 is held in position by the
pin I40 and by the end portion I42 of the ser
rated’ bar I31. This end portion I42 is mounted
in a bore hole I43 provided in the bail I39.
A pawl I44 surrounded bv a coil spring I45
2,098,444.
comprises an end'portion Ill? and is situated in a
vertical bore hole I46‘ formed in the bail I39.
The lower portion Iii of the pawl I44 is of larger
diameter than the pawl I554. The portion Iii? ?ts
into a suitable recess M5 formed in the bail I 39
and is adapted to project into one of the two
recesses I139 formed in the end portion M2 of the
serrated bar I37. As shown in Figure 13, the two
recesses 549 are situated diametrically opposite
10 each other.
The pin MEI comprises a threaded portion I53
and‘ carries nuts I5I. A coil spring I51.i surrounds
the pin I40. One end of the spring I 5i? presses
against the nuts I5I carried by the pin. I48, while
15 the other end or’ the spring l5iI presses against
the bracket I32.
The pin I40 with its support is situated
a
recess I55 formed in the beam HI and. is cov
ered by a plate I56.
20
The device is operated as follows:
The serrated bar I3‘! is moved in the direction
of the arrow I5'I by a device which is not shown
in the drawings and which may be the same as
the pendulum lever ‘I5 and the cam "Iii shown in
25 Figure 2.
I
The bar I3'I will push the bail I39 outwardly in
the direction of the arrow I57, thereby compress
ing the coil spring IEI-l surrounding the pin Me.
As soon as-the cam surface ‘Iii (Figure 2) will
30 release its pressure against the serrated bar 537,
the spring I54 will expand and tend to move the
bail I39 back into the position shown in full lines
in Figure 13. If a heddle is dropped between a
pair of adjacent teeth I36 and I
it will lock
35 the bar I31 in its right-hand position (looking in
the direction of Fig. 13), so that the spring I551
will remain compressed and the bail I39 will not
return to the bracket I32. In the course of the
upward movement of the frame I30 caused by the
40 treadles I 2 (Fig. 1) or any other suitable means,
the member I39 will strike against a lever which
is not shown in the drawings and which may be
the lever 81 shown in Figure 2, thereby operating
the knock-out mechanism of the type described in
45 connection with the device shown in Figures 1. to
12 of the drawings.
The bar I35 is of oval shape, as illustrated in
Figure 14. Obviously, both the inner and outer
bars may be of any other suitable shape.
50
It is apparent that in the devices constructed
in accordance with the present invention, the
serrated bars continue their upward movement
along with their frame, even if a warp has been
broken and a heddle has been allowed to fall
55 upon the serrations of the bars until this upward
movement has been practically completed. Only
the friction of the inner serrated bar need be
overcome in order that it may carry out its return
movement in the direction of its longitudinal axis,
60 so that the springs causing this return movement
may be made comparatively weak.
A dropped heddle clamped between the serra
tions of the two bars is not subjected to any force
other than that of the springs which always have
65 their uniform low tension independently of the
number of shafts, so that the heddles are not
subjected to any considerable stress by the device.
The cam ‘III which along with the pendulum
lever ‘I5 causes the lengthwise movement of the
70 inner bar, is positively connected with its drive,
so that it is actuated without the use of any
easily breakable and unreliable elements.
A further advantage of the present invention
is the arrangement of the serrated bars in such
75 manner that they can be turned relatively to
5
each other about a common longitudinal axis.
It is thus possible to turn the bars in such man
ner that the heddles rest upon a smooth surface,
and consequently, can be conveniently pushed
backward or forward and/or removed or replaced
by new ones. On the other hand, the bars are
mounted in such manner that they are ?rmly
clamped after having been rotated through an
angle of 180°, so that they will always assume
their correct positions and will not rotate of their
own accord. Both the outer and the inner bars
can be easily removed and replaced by new ones.
Figure 15 shows a portion of a cotton loom, or
the like, provided with a stationary frame I60.
An inner serrated bar I6! which is provided with
teeth I82 is movably mounted in the frame I69.
The bar IGI is surrounded by a tubular serrated
bar I63 which is carried by the supports I64
and IE5 attached to the frame I 60. The inner
bar iIiI is reciprocated in the direction of its
longitudinal axis by a two-armed lever I66 which
is pivoted at I61 and which carries a roller I68
15'
20'
pressed against a cam I69 by a spring III]. A
cable Ill attached to a knock-out mechanism
(not shown) is connected to a lever I12 carried 2.5
by a support I'I3 which is moved up and down
along guides IN by a rod I15 driven by a disc
I76 which is keyed upon the shaft Ill carrying
the cam I69. Drop wires I18 are situated over
the serrated bars IBI and I 63. While the loom 30
is being operated, the lever I72 is situated in
the position shown by broken lines in Figure 15,
and is moved up and down by the support I73
without striking the serrated bar I6I which is
reciprocated in the direction of its longitudinal 35
axis by the lever I66. 'If awarpthread I8 breaks,
a drop wire I18 falls upon the bars IiiI'and I63
and is clamped between a tooth I62 of the inner
bar IEI and a tooth I19 of the outer bar I63
during the return movement of the bar IiSI in 40
the direction of the arrow I86. Then the bar
I6! is locked, so that it comes in contact with
the lever I72 during the next upward movement
of the latter and moves the lever from the posi
tion shown by broken lines in Figure 15 to the 45
position shown in full lines in that ?gure, thereby
pulling the cable III and stopping the loom.
Figure 16 shows the position of the drop wire
I78 while the loom is in operation. Figure 17
shows a drop wire I'I8 clamped between the ser
rated bars after the breakage of the thread.
Figure 18 shows the serrated bars after the outer
50
bar I63 has been rotated to an inoperative posi
tion.
The provision of a ?exible cable 93 or I 'II actu
ated by the motion of the warp stop frame or the
55
support I13 and actuating the knock-out mecha
nism assures a smooth operation of the entire
device. A ?exible cable is to be preferred to con
necting rods, since it occupies little space and 60
is much more reliable in operation.
I
Numerous changes may be made in the de
scribed constructions without departing from the
scope and spirit of the present invention.
What is claimed is:
65
1. In a mechanical warp stop motion for looms,
the combination with a heddle frame provided
with a series of heddles, a bar which is circular in
cross-section and which comprises teeth formed
upon one of the surfaces thereof, another bar
carrying the ?rst-mentioned bar and having a
portion which is U-shaped in cross-section and
which is provided with teeth adapted to be situ
ated adjacent the teeth of the ?rst-mentioned
bar in the operative position of said bars, each
6
2,098,444
of the teeth of the two bars having an oblique
surface and a substantially vertical surface, the
vertical surface of a tooth of one bar facing oppo
sitely to the vertical surface of an adjacent tooth
of the other bar, one of said bars being rotatable
relatively to the other bar about its longitudinal
axis, whereby a smooth surface is presented to
a heddle falling upon said bars if the rotatable
bar is moved from its operative position, one of
10 said bars being reciprocable in the direction of
its longitudinal axis relatively to the other bar,
the vertical surfaces of the teeth of the two
bars being adapted to clamp a fallen heddle situ
pendulum lever, means carried by said pendulum
lever and engaging a surface of said cam to oscil
late said lever, means carried by said pendulum
lever and engaging the movable serrated bar while
said lever is oscillated to move the bar, whereby
the vertical surfaces of the serrations of the two
bars are moved away from each other, so that
no clamping of a heddle falling upon the serra
tions can take place, means engaging an opposite
end of the movable serrated bar to return the 10
bar to its original position after it has been moved
by the third-mentioned means, whereby the ver
tical surfaces of the serrations are moved toward
ated between them in the course of said relative
15 movement when said. bars are in the operative
position, whereby the two bars are locked, means
supporting said bars, means for reciprocating the
?rst-mentioned means, and a knock-out mecha
nism comprising means actuated by said bars
20 while they are locked.
2. In a mechanical warp stop motion, a frame
provided with a series of heddles, a pair of yield
able supports carried by said frame on opposite
sides thereof, a tubular bar having serrations
formed therein, means carried by said yieldable
supports for carrying said tubular bar and for
preventing the rotation of said tubular bar,
another serrated bar situated within the ?rst
mentioned serrated bar, and freely rotatable
30 therein about a longitudinal axis common to the
two bars, the serrations of one bar having sub
stantially vertical surfaces situated oppositely to
the Vertical surfaces of the serrations of the other
bar in a predetermined relative angular position
of said bars, one of said bars being reciprocable
relatively to the other bar in the direction of
said longitudinal‘ axis, said serrations clamping
a heddle falling between said serrations in the
course of said reciprocal movement, whereby the
two bars are locked, means for reciprocating said
frame, and a knock-out mechanism comprising
means actuated by said bars while they are
locked.
3. In a mechanical warp stop motion, a frame
cs u~_ provided with a series of heddles, a pair of yield
able supports carried by said frame on opposite
sides thereof, a serrated bar, members carried
by said yieldable supports and clamping said bar,
said members engaging said bar to prevent ro
tation thereof, said members being adapted to be
removed out of contact with said bar to enable a
rotation or withdrawal of said bar, another ser
rated bar situated within the first-mentioned ser
rated bar and freely rotatable therein about a
longitudinal axis common to the two bars, the
serrations of one of said bars having substan
tially vertical surfaces situated oppositely to the
vertical surfaces of the serrations of the other bar
in a predetermined relative angular position of
60 said bars, one of said bars being reciprocable
relatively to the other bar in the direction of said
longitudinal axis, said serrations clamping a
heddle falling between said serrations in the
course of said reciprocal movement, whereby the
two bars are locked, means for reciprocating said
frame, and a knock-out mechanism comprising
means actuated by said bars while they are locked.
4. In a mechanical warp stop motion for looms,
the combination with a heddle frame provided
70 with a series of heddles, a serrated bar, another
serrated bar movable relatively to the first-men
tioned serrated bar, the serrations of one of said
bars having vertical surfaces situated oppositely
to the vertical surfaces of the serrations of the
75 other bar, a cam, means for rotating said cam, a
each other, so that a fallen heddle is clamped
between two vertical surfaces in the course of
said return movement, a frame carrying the two
serrated bars, means for reciprocating said frame
from a lower shed position to an upper shed posi
tion, and vice versa, and a knock-out mechanism
comprising means actuated by said serrated bars 20
while they are locked, the third-mentioned means
striking the end of the serrated bar while said
frame is in the lower shed position.
5. In a mechanical warp stop motion for looms,
the combination with a heddle frame provided
with a series of heddles, a serrated bar, another
serrated bar movable relatively to the first-men
tioned serrated bar, the serrations of one of said
bars having vertical surfaces situated oppositely
to the vertical surfaces of the serrations of the 30
other bar, a cam, means for rotating said cam, a
pendulum lever, means carried by said pendulum
lever and engaging a surface of said cam to os
cillate said lever, means carried by said pendulum
lever and engaging the movable serrated bar
while said lever is oscillated to move the bar,
whereby the vertical surfaces of the serrations of
the two bars are moved away from each other, so
that no clamping of a heddle falling upon the ser
rations can take place, means engaging an oppo 40
site end of the movable serrated bar to return
the bar to its original position after it has been
moved by the third-mentioned means, whereby
the vertical surfaces of the serrations are moved
toward each other, so that a fallen heddle is 45
clamped between two vertical surfaces in the
course of said return movement, a frame carrying
the two serrated bars, means reciprocating said
frame by moving the same vertically from a lower
shed position to an upper shed position and vice 50
versa, and a knock-out mechanism comprising
means actuated by said serrated bars while they
are locked, the last-mentioned means being actu
ated by the locked serrated bars when the frame
is substantially in the upper shed position.
6. In a mechanical warp stop motion for looms,
the combination with a heddle frame provided
with a series of heddles, a partly tubular bar hav
ing an oval cross-section and having serrations
formed therein, another serrated bar situated
within the ?rst-mentioned bar and having a cir
cular cross-section, the second-mentioned bar be
ing rotatably mounted in the ?rst-mentioned bar,
one of said bars being movable longitudinally in 65
relation to the other bar, the serrations of one
of said bars having vertical surfaces situated op
positely to the vertical surfaces of the serrations
of the other bar, whereby the two bars are locked
when a heddle is placed between the serrations 70
of the two bars in the course of the longitudinal
reciprocatory movement of the movable bar rel
ative to the other bar, means for reciprocating
longitudinally the movable bar relatively to the
other bar, and a knock-out mechanism compris 75
2,098,444
ing means actuated by said bars while they are
locked.
7. In a mechanical warp stop motion in looms,
the combination with a heddle frame provided
with a series of heddles, a serrated bar, another
serrated bar carried by the ?rst-mentioned bar
and movable relatively thereto in the direction of
vits longitudinal axis, means carried by said frame
and carrying the ?rst-mentioned serrated bar, the
10 serrations of one of said bars having substantially
vertical surfaces situated oppositely to the vertical
surfaces of the serrations of the other bar, means
for moving the second-mentioned bar relatively
to the ?rst-mentioned bar in a predetermined di
15 rection which is parallel to the direction of the
longitudinal axis of the second-mentioned bar, a
bail movable along with the second-mentioned
bar when the latter is moved in said predeter
mined direction, a pin ?rmly connected with said
20 bail and slidably mounted in said frame, a spring
surrounding said pin and pressing against said
frame for causing said pin, said bail and the sec
ond-mentioned bar to move in a direction oppo
site to said predetermined direction after the
25
second-mentioned bar has completed its motion
in said predetermined direction, said serrations
clamping a heddle falling upon them in the course
of the movement of the second-mentioned bar in
the direction opposite to said predetermined di
rection, whereby said bars are locked, means for
reciprocating said frame, and a knockout mech
anism comprising a lever which is out of contact 5
with said bail while said bars are not locked, and
which is operatively actuated by said bail while
the bars are locked.
@
8. In a warp stop motion for looms, the com
bination with a heddle frame provided with a 10
series of heddles, a pair of relatively counter
toothed bars, one reciprocable within the other
and freely rotatable within the con?nes of the
same about a common longitudinal axis, pushing
means contacting one of said bars for causing a 15
relative reciprocation of said bars and ?exible
means contacting the opposing end of one of said
bars to cause said bars to return to their original
position, said bars and said teeth being so ar
ranged and spaced that a fallen heddle will ride 20
over said teeth during the pushing operation
and be clamped between said teeth during the re
turn movement, whereby said bars will be inter
locked and means controlled by said interlocking
operation for stopping the operation of the loom. 25
THEODOR CURT WAGNER.
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