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Патент USA US2129639

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Sept. 13, 1938.
5'. J. ADAMS, El‘ ALSTOP mow'rxou FOR ROVING FRAMES
2,129,639
'
Filed Sepf. 11, 1937
4.90“
q
T6
7y
Patented Sept. ‘13, 1938
. $129539
UNITED STATES PATENT OFFICE‘
2,129,639 >
STOP MOTION FOR,’ ROVING, FRAMES
Simpson James Adams and’ William Archie
Smith, Spindale, N. G.
I
Application September 11, 1937, Serial No. 163,494
'
11 Claims.
Our invention relates to textile machinery and
in particular to'arrangements for automatically
stopping. the machine when a strand of textile
material being operated “on by the machine
5 breaks or acquires‘an excessive amount of slack.
While our. invention is'p'articularly adapted for
‘use on a roving machine,_it may be applied to
other forms of textile machines.
I
5,5. Known ‘forms of stop. devices employing drop
it ‘wireslcannot-be used on the sliver delivered from
the front roll of ‘a roving frame due to the fact
that the sliver. is very delicate because of the lack
,ofT‘twistQin the sliver. ' The twist in the sliver
atzth‘is. point is kept as low as possible so the
la ‘?b‘recan be readily drafted down in the next
‘
(Cl. 118-_—4)
As shown in Figure 1, the draft rolls lv and'Z
comprise a series of longitudinal sections engag
ing each other, and a strand or sliver ofv the
roving machine is fed to the back pair of rolls
of each section by means of a guiding trumpet 5
5. The roving sliver is passed successively be
tween the second and third pair of draft rolls
and extends to rotating ?yers arranged in front
of the roving machine. In Figure2, the sliver
or strand 6a extends to the ?yer "la in the back 10
row of ?yers, while the sliver 622 extends to a
flyer ‘lb located in the front row of ?yers. Alter
nate slivers, therefore, are associated with the
v?yers in alternate rows. The two ,?yers la and
"lb wind the roving slivers on bobbins 1c and 1d 15
'fp'lodess to‘ follow,‘ and for this reason, the con
respectively. The guiding trumpets 5 associated
'ventional type of drop wire cannot be used at this
with the various sections of draft rolls are mount
point because it imposes too much weight on the
ed upon a frame or bar 8 which is mounted for
sliver and will cause it to stretch and ultimately
reciprocating movement parallel with the axis
break.
7
_
Y
Y
of the draft rolls l—2.
'
An object of the invention is, to vdevise an au
tomatic stop device for a textile machine which
Twill‘ not injurei'or breakdelicate strands of tex
tilev materialQ. The drop wire employed in the
; ,_stop"m6tionin the present invention is designed
to ha've‘its entire weight supported independently
of
the'sliver.
’
p
'
1
'
'
'f‘ A further object of the invention'isto devise
an automatic stop for detecting an excessive
I30 ‘amountof 'sl'a'ck'or'break in alstrand of textile
material where the strand is subjected not only
to longitudinal‘ movement but to a traversing
movement'as' well."
'
‘
‘A. preferred embodiment of our invention is
~_;5 shown in the accompanying drawing as applied
to a roving machine, and in the drawing, Figure
I is‘ ‘a diagrammatic view showing a fragment of
a'r‘oving machine in front elevation;
' ‘Figure 2‘ is‘ a sectional view of Figure 1 taken
a“), along'l‘ine 2-~2 and showing two ?yers and as
sociated bobbins;
‘
Figure 3 is a sectional view taken along'li'ne
3-3 ‘of Figure 1;
" Figure ,4 isa vvi'e‘w‘illustrating a modi?ed form
45 ‘of cjl’etectorereed; ‘
'
' ‘Figure 5 is a sectional view along line 5—5 of
“Fi‘gurefé', and
.
Figure dis a side view of a modi?ed detector
reed.‘
15,9 -~' Referring to the drawing, power driven draft
‘rolls of theroving-machine are indicated at l,
‘and the cooperating‘ top’ rolls, which are'usually
covered with cork or leather, are shown at 2.
The ‘draft rolls are journaled upon suitable
25;, brackets 3 mounted upon the machine framed.
Suitable means are 20
known for reciprocating the frame 8 and such
means is represented in Figure 1 of the drawing
as cam 9 mounted upon a rotating shaft 9a,
and cooperating with a follower 91) carried by
a bracket 90 secured to ‘the frame 8. Suitable 25
biasing means represented by the spring I0 is
provided to maintain the follower in contact with
the cam. It is understood that the purpose in
providing the ‘oscillating ‘movement of the guid- ,
ing trumpets 5 is to impart a traversing motion 30
to the roving slivers so that the sliver will not
remain in one path in passing through the draft
rolls but will be shifted’ to different parts of the
draft. roll and thus prevent uneven wear.
The arrangement described above is included 35
in the ordinary construction of a roving machine.
The stop arrangement constituting our invention
involves a frame It formed of insulating mate
rial mounted upon frame 4 between the draft
rolls and the ?yers. The frame H is mounted '40
for reciprocating motion parallel with the axis
‘of the draft rolls, and this reciprocating motion
may be imparted to the frame I I from the frame
8 by a connection between these frames as indi
cated by the bracket [2. If desired, a separate “4'5
cam or other driving means may be provided for
reciprocating the frame II in synchronism with
frame 8. It is not essential that the frame I I be
reciprocated the same distance as frame 8 but
the two frames should be reciprocated in syn- t‘50
chronism.
The insulating frame ll carries a number of
reeds or drop wires l3, there being one reed
associated with each section of the draft rolls
_
and arranged in alignment with‘ the correspond- Q55
2
2,129,639
ing guiding trumpet 5. As shown in Figure 3,
the reeds l3 are pivotally supported in a slot
Ila formed in the frame II by means of pins
I311. The pivotal points of the reeds are ar
ranged below the center-of gravity of the reed,
and in its normal operation the reed occupies a
vertical position and is maintained in this posi
Ill
tion by the roving sliver.
It will be understood
that when the reed is in normal or running posi
part of the reed, two pins 140 and Md may be
tion, it occupies a position of unstable equili
brium, and the slightest force will cause the
mounted in the insulating frame II to cooper 10
ate with the twisted section I3c of the reed, the
reed to tilt either to the right or to the left of
its pivot point. As shown in Figure. 1, the reed
is formed with an elongated aperture [3b formed
in the upper end through which the roving sliver
two pins being joined together by conductor M.
passes.
These reeds are preferably formed of a
very light material, such as aluminum; and may
be stamped from strip ‘or sheet stock, although
they may also be formed of aluminum wire as
described below. On the front side of the in
sulating frame H is arranged a conducting strip
l4 formed of any suitable metal, such as copper,
and a pair of transverse extensions Ma and 14b
are provided on the strip and arranged on op
posite sides of each reed I3, the extensions 14a
and Mb being arranged to serve as stops to limit
the tilting of the reed to either side of its nor
mal position. All of the pivot pins 13a are joined
together by conductor l5 which is insulated from
the conductor M.
Any suitable power throw-01f device may be
employed, and in Figure 1 of the drawing we
have represented this arrangement as consisting
into the reed without the necessity of threading
the sliver through a slot or aperture in the reed.
As shown in Figure 1, the reeds associated with
the back row of ?yers may be shorter than the 20
reeds associated with the front row of ?yers, but
both sets of reeds may be made of the same length,
if desired.
Various modi?cations of our invention will be
obvious to those skilled in the art, and any such 25
modi?cations that fall within the terms of the
appended claims are considered as falling within
the scope of our invention.
What we claim is:
1. In a stop device for a textile machine, a reed .
for embracing opposite sides of a textile strand,
said reed being pivotally supported below its
I1 which is shifted by a pivoted lever 18 against
the action of the biasing spring IS, the fork
being maintained in normal operating position
of said strand to prevent substantial tilting in
‘by means of a latch 2B engaging an abutment on
the bar 11 as shown. The conductors l4 and 15
are connected in an electric circuit which includes
a suitable source of current represented by the
battery 21, a magnet 22 for lifting the latch 20,
‘and asuitable switch 23 which is operated to
open-circuit position when the bar 11 moves to
unlatched position.
During the normal operation of the roving ma
chine, the power throw-off device is set as in
Fig. 1, and the reed supporting frame II is re
ciprocated or traversed in synchronism with the
either direction so long as said strand runs at
normal tension, and means controlled by said
reed when it tilts a predetermined amount in 40
either direction for interrupting the power ap
plied to said machine.
>
2. In a stop device for a textile machine, a
reed for embracing opposite sides of a textile
strand, said reed being pivotally supported below 45
its center of gravity and arranged for tilting
movement transversely of said strand to either
side of its, position of unstable equilibrium, said
reed having parts for engagement with opposite
sides of said strand to prevent substantial tilting
traversing bar 8 carrying the guiding trumpets 5,
the reeds I3 being maintained in vertical position
by the slivers, which position corresponds to the
in either direction so long as said strand runs
‘at normal tension, and a pair of electrical con
position of unstable equilibrium. So long as a
sliver does not break or acquire substantial slack,
tacts arranged on opposite sides of said reed and
positioned to be engaged by said reed when it tilts
the reeds I3 are maintained in substantially ver
55 tical position and no appreciable force is exerted
on the slivers by the reeds, since the weight of
the reed is carried by the pivot pins, and there
is substantially no transverse force exerted on
the sliver. In case a sliver should break or should
acquire an excessive amount of slack, the asso
ciated reed will fall to one side or the other of
its normal position and will engage one of the
extensions Ma and Mb of conductor l4, thereby
closing the circuit to energize magnet 22 and to
65 release latch 20, thus permitting the belt-shift
ing fork IE to be moved into a position to shift
the power belt to the loose pulley and thereby
stop the machine. As soon as the lever l'l shifts
to the left, the switch 23 opens and avoids waste
70 of current while the machine is stopped. After
1,7,5
In Figure 6 we have illustrated a modi?ed form
of reed or drop-wire in which the reed is open at
the upper end and the two ends or tines are flared 15
outwardly to facilitate the insertion of the sliver
center of gravity and arranged for tilting move
ment transversely of said strand to either side
of its position of unstable equilibrium, said reed .
having parts for engagement with opposite sides '
of a belt~shifting fork l5 mounted upon a bar
Li
form of drop wire or reed formed from suitable
wire of light-weight material such as aluminum
wire. As will be seen this form of reed consists
of a loop of wire having both ends wound around
the pivot pin l3a one or more turns and then
twisted together at the lower end as indicated
at I30. Instead of employing the electrical con
tacts Ma and Mb cooperating with the upper
the abnormal conditions have been corrected by
the attendant, the operated reed will again main
tain its vertical position and the machine may be
started by operating the lever l8 to the right.
In Figures 4 and 5 we have shown a modi?ed
a predetermined amount from its position of un
stable equilibrium.
55
3. A stop device according to claim 1 in which
the power interrupting means includes an elec
tric circuit and a pair of contacts arranged on
opposite sides of the reed and cooperating with 60
the reed for completing said circuit when the reed
tilts a predetermined amount from its unstable
position.
4. In a stop device for a textile machine, a reed
for embracing opposite sides of a textile strand, 65
said reed being pivotally supported below its
center of gravity and arranged for tilting move
ment transversely of said strand, said reed having
parts for engagement with opposite sides of said
strand and for normally maintaining said reed in 70
its position of unstable equilibrium by said strand,
and means controlled by said reed when it tilts
a predetermined amount from its position of un
stable equilibrium for interrupting the power ap
plied to said machine. -
3
2,129,689
5. In a stop device for a textile machine, a drop
reed having a perforation for receiving a textile
strand, means for pivotally supporting said reed
below its center of gravity on an axis to con
strain said reed to movement transversely of said
strand and on either side of the vertical position,
the sides of said perforation being arranged to
engage opposite sides of said strand and prevent
substantial tilting in either direction so long as
10 said strand runs at normal tension, and means
controlled by said reed when it inclines to either
side of the vertical position by a predetermined
amount to interrupt the power applied to said
machine.
6. In a textile machine, means for feeding a
textile strand through said machine, means for
simultaneous traversing motion to said guiding
means and to said reed.
(
9. In a textile machine, a pair of draft rolls for
feeding a textile strand, guiding means for said
strand arranged on one side of said rolls, a stop
device for said machine including a drop-reed ar
ranged on the opposite side of said rolls and em
bracing said strand, and means for imparting si
multaneous traversing motion to said guiding
means and to said drop-reed.
10. In a textile machine, draft rolls for draw
10
ing a textile strand through said machine, guid
ing means for said strand arranged on one side
of said rolls, a reed for embracing said strand
on the opposite side of said rolls, means for piv 15
otally supporting said reed below its center of
periodically traversing said strand transversely
gravity and in a position for tilting movement
of its direction of travel, a reed embracing said transversely of said strand to either side of its
strand, means for traversing said reed synchro
position of unstable equilibrium, means for im
nously with said ‘strand, and means controlled parting simultaneous traversing motion to said 20
by said reed upon the breaking of said strand guiding means and to said reed supporting means,
or upon excess slack therein for interrupting a pair of electric contacts arranged on opposite
power applied to said machine.
sides of said reed and positioned to be engaged by
below its center of gravity and in a position for
said reed when it tilts a predetermined amount
from its position of unstable equilibrium, a power 25
throw-off device for said machine, an electric
circuit for controlling said power throw-off de—
vice, said circuit including said reed and said con
tacts whereby said circuit is energized by the
tilting movement transversely of said strand to
either side of its position of unstable equilibrium,
position.
means for traversing said reed supporting means
synchronously with said strand, and means con
trolled by said reed when it tilts a predetermined
11. In‘ a textile machine, means for guiding a
textile strand through a machine, a stop device
for said machine including slack detecting means
amount in either direction from its position of
unstable equilibrium for interrupting the power
applied to said machine.
embracing said strand and being operable upon 85
7. In a textile machine, means‘ for feeding a
textile strand through said machine, means for
periodically traversing said strand transversely of
its direction of travel, a reed embracing said
strand, means for pivotally supporting said reed
8. In a textile machine, means for guiding a
textile strand through a machine, a stop device
for said machine including a drop-reed for em
bracing said strand, and means for imparting
tilting of said reed to either side of its unstable 30
excessive slack in said strand or upon a break
therein to stop said machine, and means for im
parting simultaneous traversing motion to said
guiding means and to said slack detecting means.
SIMPSON JAMES ADAMS.
40
WILLLIAM ARCHIE SMITH.
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