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Патент USA US2409962

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~ ‘ ' Oct- 22, 1946.
DE HART G. scRANToM
_
2,409,961
FAULT. DETECTOR AVND AUTOMATIC STOP DEVICE FOR TEXTILE MACHINES
Filed Aug. 26, 1944
3 Sheets-Sheet '1
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INVENTOR.
Oct. 22, 1946.‘
DE HART s. scRAN'roM I
,
2,409,961
FAULT DETECTOR AND AUTOMATIC S-TOP DEVICE FOR TEXTILE MACHINES
Filed Aug. 26, 1944'
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0 Oct. 22, 1946;
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DE HART G. SCRANTOM
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7 2,409,961
FAULT DETECTOR AND AUTOMATIC STOP DEVICE FOR TEXTILE MACHINES
Filed Aug. 25, 1944
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\ INVENTOR.
j. G'- Scram‘am
?TT ORNEY'
Patented Oct. 22, 1946
2,409,961 '
UNITED STATES PATENT OFFICE
2,409,961
FAULT DETECTOR AND AUTOMATIC STOP
DEVICE FOR TEXTILE MACHINES
De Hart G. Scrantom, Maplewood, N. J ., assignor
to Western Electric Company, Incorporated,
New York, N. Y., a corporation of New York
Application August 26, 1944, Serial No. 551,336
11 Claims.
(Cl. 66—166)
2
1
of the knitting mechanism showing the produc
This invention relates to an automatic fault
detector for knitting, braiding, weaving, strand
tion of a rough knitted fabric over a conductor .
ing, twisting and like machines and more par
and the position of the control arm of the stop
ticularly to an electrically controlled stopping de
device;
vice for a textile machine wherein a knitted ma
terial is produced or a knitted covering is applied
Fig. 8 is an enlarged cross-sectional view of an
insulated conductor covered with a rough knitted
over a core such as an electric conductor.
fabric;
Some of the limiting factors in operating knit
ting machines are the breaking of threads and
the dropping of stitches in the knitting opera
1011.
Fig. 9 is a front elevational View of a modi?ed
stop device wherein the birfurcated control arm
10 may be moved into and out of operative position;
Fig. 10 is an end view of the modi?ed stop de
An object of the present invention is to provide
a small compact device for promptly'stopping a
textile machine upon the occurrence of undesir
able conditions or faults, such as the breaking of
a. yarn or thread, the breaking of the needle
and/ or the dropping of a stitch.
Another object of the invention is the provision
of an electrical stop device which may be applied
readily to machines already in use without ma— 20
terial changes in the construction thereof.
vice shown in Fig. 9, and
V
a
Fig. 11 is a schematic circuit diagram disclosing
one adaptation of the electrical stop device of this
invention.
,
Referring now to the drawings, the reference
numeral It designates a frame of a knitting ma
chine on which is mounted a motor l I. This mo
tor drives a pulley l2 and a belt l3, which in turn
drives suitable gearing l4 enclosed in a gear box
IE secured to the frame In of the machine by
tension in the textile strands caused by the break
bolts I6. The gearing l4 rotates a hollow tubular
shaft ll (Fig. 2) through which a core or electri
cal conductor 20 passes to or. from a knitting
mechanism 2|.‘
The knitting mechanism to which this inven
tion is applied is disclosed more in detai1 in B.
W. Lerch et al., Patent 2,236,183, and S. E. Brill
hart Patent 2,239,378, and only so much of this
ing of a strand or the occurrence of a dropped
mechanism is disclosed and described hereinafter
In accordance with one embodiment of the in~
vention, an automatic stop device is applied to a
knitting machine so that a control arm of the de
vice is moved by the knitted material or by a con
ductor or core being covered with the knitted ma
terial when the material is moved transversely
to its direction of travel because of an unbalanced
stitch during the knitting process.
vOther objects and advantages of the present in
vention will be apparent from the following de—
tailed description taken in connection with the
as is necessary for a'full understanding of the
present invention.
. ’
‘
Rotatable with the tubular shaft ll. of the knit
ting mechanism, is a jack cylinder 25 which is also
driven by the gearing l4. Needle jacks 26 are re
Fig. 1 is a fragmentary front elevational view
of a conventional type knitting machine disclos
ing the electrical stop device of this invention ap
butts 28 which engage wobbler cams'29 operated
by driven shaft IT as shown in Fig. 2. The up
drawings wherein:
plied thereto;
Fig. 2 is an enlarged part-sectional View of the
needle operating mechanism for applying a
ciprocated in the jack cylinder through their
per end of the knitting head is provided with a
needle guide cylinder 39 in which a plurality of
knitting needles 3| are reciprocated. by bifurcated
knitted covering over an electrical conductor and
ends 32 of the needle jacks 2'6 engaging projec-V
the application of the automatic stop device
tions 33 on the knitting needles.
thereto;
Fig. 3 is an enlarged fragmentary vertical sec
tional view showing a modi?ed bifurcated control
arm of the electrical stop device in operative po
sition with the conductor being covered with a
The strands, threads
‘ knitting operation are
of stationary cops 36
swingably mounted on
.
or yarn 35 (Fig. l) for th
supplied from a plurality
supported on a stand 31
the frame ll] of the knit
ting machine.
The strands of yarn or threads 35 are fed from
Fig. 4 is a sectional View taken on line 4-4 of 50 the cops 36 through guides 38 and 39 to a yarn
knitted fabric;
guide spider 40 positioned immediately above and
Fig. 3;
Fig. 5 is a fragmentary vertical sectional view
of the knitting mechanism disclosing the produc
tion of a smooth knitted fabric over a conductor
and the position of the control arm of the stop
device;
.
concentric with the knitting needles 3|. The
guide spider 46 is adjustably mounted on an up
right 4! which is secured to the upper surface of
the gear boX l5. Thisspider carries a plurality
of yarn guides d5 which are concentrically ar
Fig. 6 is an enlarged cross-sectional view of an
insulated conductor covered. with a smooth
ranged and equally spaced around a cylindrical
knitted fabric;
vertical direction within'a central opening in the
The conductor 20 passes, up
tube or web holder 45 adjustably mounted in‘ a
. ‘Fig. 7 is a fragmentary vertical sectional view 60 spider 49 (Fig. 2).
2,409,961
3
4
or down through this cylindrical tube 46 and a
knitted tubular covering of yarn is applied over
the conductor by the knitting needles.
contacts 51, 60 or El, 6!. The closure of either
of these' contacts by the control arm'establishes
a shunt from ground through either contact at
or 6! through conductor 62 to grounded battery
63 to thus shunt out or by pass the solenoid 61
thereby tie-energizing it. The coil spring 19 then
Thus the strands of yarn are led to the needles
from equally spaced points about a circle in a
symmetrical pattern to converge into a knitted
covering or web around the conductor and the
conductor will under normal conditions invari
moves the armature 65 to open position to dis
connect the motor from the source of power 58
ably travel in a central position relative to the
to stop the machine. The shunting of solenoid
knitting mechanism because of approximately 10 67 de-energizes it and spring 85 then moves
equal tension of the strands of yarn on all sides
switch 64 to open position to prevent restarting
thereof. However, in the event a strand of yarn
of the machine until the defect is corrected and
breaks or a drop ‘stitch occurs due to a broken
switch 64 is again manually closed.
needle or other cause to disturb the symmetrical
From the foregoing it will be evident that the
pattern, the tension or pull on the knitted ma 15 textile machine will be automatically controlled
terial and‘ on the conductor from the various
and stopped when any defect occurs in the knit
sides will be unequal thereby causing the knit
ted fabric to cause it to move out of its normal
ted‘ material and the conductor to oscillate or
line of travel or to cause the core being covered
shimmy out of its normal central position of
to ?uctuate out of its normal line of travel.
travel. If the material is knitted without acore 20
The knitting machine disclosed in Fig; i. of
then the knitted material alone will oscillate as
the drawings is designed to produce a smooth cov
above described on the occurrence of a‘ defect
ering as shown in Fig. 6 with knots l2 on the in
therein.
side or to produce a rough covering as. shown in
This oscillating movement of the knitted ma
Fig. '2 with the knitted knots ‘E2 on the outside.
terial and the conductor on the occurrence of a 25
In the production of the smooth covering the
fault provides the operating basis'of the pres
conductor or core 2i] enters the top of the knit
ent invention for automatically and promptly ar
ting mechanism and travels downward‘ as indi
resting the movement of a knitting or similar ma
cated by the arrows in Figs. 5 and 3.
chine.
a smooth covering, the cylindrical tube Or web
'
In knitting
In accordance with one embodiment of the 30 holder 66 is moved upwardly from the position
invention, a hooked control arm All (Figs. 2, 5
shown in Figs. 2 and 7 to that shown in Fig. 5
and 7) or a bifurcated control arm t8 (Figs. 3
and 4) is positioned to contact the knitted ma
terial or the conductor 25 When in its normal
central position relative to the knitting needles
arranged in a circle. This control arm 41, or 48
is slidably mounted in a support 5!} which is se
cured by a bolt and nut to the spider it as shown
in Fig.2. The straight end of the control arm
47 or 48 is provided with an insulator member
56 which engages a vertical leaf spring contact
57 suitably secured to the support 59' and in
sulated» therefrom.
Mounted in two upturned
lugs 58—59 of the support 5%! are two threaded
contacts Ei0—6l spaced on each side of the con
tact 51.. The threaded contacts SKI-61 can be
individually adjusted relative to the common
contact 51 to give any desired degree of sensi
so that the control arm 4? or 48 of the stop de»
vice is positioned below the web holder 46.
In knitting a rough covering, the conductor or
core 20 enters the bottom of the knitting mech
anism and travels upwardly as indicated by‘the
arrow in Fig. 7. This knitting operation requires
that the web holder 45 be positioned closer to
the knitting needles 3| as shown in Fig. 7
and that the control arm Ill or 48' be positioned
Within a cut out in the web holder 45 as shown
in Figs. 2 and 7.
A modi?ed structure for moving the control’
arm of the stop device into and out of engagement
with the conductor or core 213 is disclosed in Figs.
9 and 10. In this modi?cation the support 51] of
the stop device is provided with a movable lever
‘is which is pivoted at M on the support. -The
tivity.
.
lever 13 has mounted on it a leaf. spring contact
,As shown in the controlcircuit diagram of Fig.
75 which is similar to and performs the same
11 the adjustable contacts 6t—6l are connected 50 function as the leaf spring contact El shown in
to ground and the contact 5?‘ is connected
Figs. 2 and 11. Contact 15 is bifurcated at its
through a conductor 62 to grounded battery 63.
lower end to form forks ‘l6 (Fig. ,10) which are
Themotor H of the knitting machine is ordi
positioned in a slot in the insulator member 56
narily controlled by a hand switch t4 (Figs. 1
secured to the right hand end (Fig. 9) of a con
55
and 11) which, when closed against the pull. of
trol arm Tl. Control arm 'l'l performs the same
a ‘spring 55, completes a circuit from ground
function and is somewhat similar to controlarrn
through a conductor 66, a solenoid Bl, a conduc
'38 in that it has a modi?ed forked endl8 and is
tor 68 to grounded battery 63 to energize sole
slidably mounted in an upturned lug 19 of the sup
noid B1. The energization of solenoid 6i pulls
port 55. Also mounted on and carried by the piv
up an armature 69 against the tension of a spring 60 oted lever ‘F3 are the two adjustable contacts 6El
10 to close a circuit through the motor I i from
6| (Figs. 9 and 11) which are mounted in lugs 39
a source of power ‘H to eifect operation of the
integral with the lever.
7
knitting machine.
Hand switch ?ll is also an
armature of solenoid 6'5 and hence upon ener
gization of the solenoid the switch armature Ed
is held in circuit closing position against the pull
of spring 65 tonprovide a locking circuit for the
solenoid.
When a strand ‘s5 breaks or a stitch is dropped
by a broken needle or by an other cause, the
conductor or core 25 being covered with a knit»
ted textile is thrown from a balanced central po
sition of travel into an oscillatory movement.
The oscillating core 25 and/or the knitted‘teX
tile moves control arm 47 or 48 to close either
When the lever 13 is manually moved counter
clockwise to the position indicated in dotted out~
line in'Fig. 9 the leaf spring contact '55 mounted
thereon is also moved and through its forks 15
move the insulator 56 and control arm ii‘ to the
right as indicated in dotted outline. This move
ment of the control arm moves its forked end 13
out of engagement with the‘conductor 20 so as to '
expedite the making of repairs when a defect oc
ours in the knitting operation.
7
The'lever 13 is held in its dotted'line position
of Fig. 9 by a tensioned coil springtZ; one~end
75 of which is secured to a portion 83 of the support
2,409,961
5
6
7. In a machine of the types indicated, means
5t and the other end of which is secured to an up
for combining a plurality of strands to form a
turned lug 84 on the lever 13. Since the lower end
covering over a traveling core which moves out
of the spring 32 is thus moved about pivot “is to
of its normal path of travel when a defect oc
shorten the distance between 83 and 8d the spring
curs in the covering, and machine stopping
becomes shorter and holds the lever 13 in the
means operated by the core when a defect occurs >
indicated dotted line position. Likewise, when
in the covering including a control arm for en
lever 13 is manually moved to its operative or full
gaging the core, and means for moving the con
line position of Fig. 9 to bring the forked end 18
trol arm out of engagement with the core.
of the control lever ‘i’! into engagement with the
8. In a machine of the types indicated, a motor,
conductor 28, the spring 82 is again shortened to 10
means operated by the motor for combining
hold lever l3 in that position.
strands to form a moving tubular fabric which
When support 50 with its modi?ed structure
oscillates out of its normal path of travel when a
(Figs. 9 and 10) mounted thereon is secured to the
defect occurs in the fabric, a control member in
knitting machine in the position shown for the
support 553 in Fig. 2, the control arm Ti will like 15 contact with the traveling fabric, a control cir
cuit for the motor which is operated. by the con
wise operate the circuit shown in Fig. 11 to stop
the machine when a defect occurs as has been de
trol member when a defect occurs in the fabric
to oscillate the member to disconnect the motor
scribed.
and stop the machine, and means for moving the
t is to be understood that the nature of the em
bodiment of the invention herein disclosed is 20 control member out of contact with the traveling
fabric.
merely illustrative and that the invention can be
applied to braiding, knitting, weaving, stranding,
9. In a machine of the types indicated, means
for combining strands to form a covering over a
twisting and like machines and that changes and
core normally traveling without oscillating but
'modi?cations may be made without departing
from the spirit and the scope of the invention.
25 which oscillates when a defect ‘occurs in the cov
ering, an electric motor for driving the strand
What is claimed is:
1. In a machine of the types indicated, means
combining means, an arcuate feeler, means for
for combining a plurality of strands to form a cov
urging the arcuate feeler into contact with the
ering over a traveling core which moves out of its
traveling core, a switch in circuit with the elec
normal path of travel when a defect occurs in the 30 tric motor for stopping the motor, and means
covering, and machine stopping means operated
operable by the arcuate feeler when the traveling
by the core when a defect occurs in the covering.
core oscillates for actuating the switch to stop
2. In a machine of the types indicated, means
the electric motor.
for applying a textile covering over a traveling
10. In a machine of the types indicated, means
core which moves laterally when a defect occurs in 35 for continuously combining strands into a cover
the covering, control means in contact with the
ing over a core normally traveling without oscil
traveling core and movable therewith in a lateral
lating but which oscillates when a defect occurs
direction when a defect occurs in the covering,
in the covering, means for driving the strand
and stopping means for the machine controlled by
combining means, a relay for stopping the driv
the said control means.
40 ing means when actuated, a pair of contacts in
circuit with the relay and connected in parallel
3. In a machine of the types indicated, means
for combining strands to form a covering over a
with each other, said contacts being spaced a
traveling core which oscillates out of its normal
predetermined distance apart, a contactor in cir
line of travel when a defect occurs in the covering,
cuit with the relay for actuating it when in en
and means for stopping the machine including a 45 gagement with one of the contacts, and means
control arm operated by the core when a defect
including a ‘feeler for engaging the covering for
holding the contactor out of engagement with
occurs in the covering.
4. A stop device for machines for applying a
the contacts when the core does not oscillate and.
covering of strands over a traveling core which
for moving the contactor into engagement with
automatically varies its movement when a defect 50 one of the contacts when the core oscillates.
occurs in the covering, comprising an arm posi
11. In a machine of the types indicated,
tioned near the traveling core and adapted to be
means for continuously combining a plurality of
actuated by the core when a defect occurs in its
strands into a covering over a core being ad
covering, and electric contacting means operated
by the actuated arm to stop the machine.
5. Electrically operated stop devices for
machines of the types indicated for applying a
vanced through the strand-combining means
normally without being oscillated but which is
means operated by the motor for combining
feeler for holding the contactor out of engage
strands to form a moving tubular fabric which
oscillates out of its normal path of travel when a
ment with both the contacts when the core is not
oscillated, and means controlled by the feeler for
moving the contactor into engagement with one
of the contacts when the core is oscillated.
whereby the electric motor is deenergized.
oscillated when a defect occurs in the covering,
an electric motor for driving the strand-com
textile covering to a traveling core which oscil
bining means, an electrical circuit for controlling
lates when a defect occurs in the textile covering,
the motor and including a pair of contacts spaced
comprising normally open contacts, means con
a
predetermined distance apart and connected in
60
trolled by, the oscillation of the core to close the
parallel and a contactor positioned between the
contacts, and means controlled by the closure of
contacts, said motor controlling circuit serving to
the contacts to stop the machine.
deenergize the motor when the contactor en
6. In a machine of the types indicated, a motor, ,
gages one of the contacts, a slidably mounted
defect occurs in the fabric, a control arm in con
tact with the traveling fabric, and a control cir
cuit for the motor which is operated by the con
trol arm when a defect occurs in the fabric to
oscillate the arm to disconnect the motor and
stop the machine.
DE HART G. SCRANTOM.
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