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Патент USA US2121964

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June-28,1938-
„
A
J. w, HAMILTON
‘
‘
2,121,964
STOP MOTION FOR KNITTING MACHINES `
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Filed Nov, 18, 1936
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A TTORNE YS
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June‘zß, 1938.
_1_ W_ HAMILTON 4 '
‘ 2,121,964. I
STOP MOTION FOR KÑITTING MACHINES
Filed Nov. 18, 1956l
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BY
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A TTORNE Xs' .
` ¿111212811938-
J. w. HAMILTON
'
2,121,964
sToP MOTION Fon KNITTING MAcHINss
'
Filed Nóv. 1a, I1936
4 sheets-sheet 3
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/NI/ENTOR
BY
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A TTORNE KS'
June 28, 1938.
.
J. w. HAMILTON
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sToP'MoTIoN FOR KNITTING MACHINES
A
Fired Nov. 18, 1936
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2,121,964
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4 sheets-sheet 4
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INVENTOR.
/20
.I `BY
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‘2,121,964A
Patented June 28,1938 ' ‘
OFFICE(
UNITED VsTA'lrEs
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`
2,121,226@
STOP MOTION .FOR KNITTING MACHINES
`loe W. Hamilton, Los Angeles, Calif.,„assignor of
forty-five percent to Reynolds Jennings Ham
ilton, Los Angeles, Calif.
'l Application November-18,1936, vsernlNo.111,365
5 claims.y (c1. fis-163)
The present'invention relates to a stop motion
mechanism particularly adapted for knitting mae
chinery, but also designed to operate in con
nection withany type> ofy textile machinery in
5; which the machine `or mechanism is to be stopped
sioned by a weak spring or Weight whichfis over
come by the normal` tension of the yarn when
properly running.“ When so tensioned the other
end of the lever will Contact withorpress againstv
or tendato` moveclosely toward a yielding mem
utilized breaks or` is subjected to. excessive ten
ber. This member is resiliently biased as to yield-`
only when there is excessive tension upon the,y
>sion or becomes tangled.
In my prior applications Ser. No. 43,308, ñled
self sufûciently to» release or discharge the yarn.
orv4 controlled when the yarn or thread being
yarn or thread to permit the guideA to»y lower it-`-
lConnectedrto the lever and turning therewith 10
is a movable electrical contact which cooperates .
27, 1935, there are described mechanismsparticu
larly designed to operate in conjunction with with añxed Contact, said contacts being termi
knitting machinery but also capable of being nalsofgan electric- circuit. y In one instance the
operated in conjunction with other machinery in , movablerelement »moves or balances‘between two
ñxedlelements.- ,In another a’spring finger con
l15 which the assurance will be had of prompt stop'
page of the knittingl machine when the thread stituting the ñxed element rides on a cylinder
breaks any place between the cone and the needle . constituting-the movable element. 'The cylinder
A10 `October 3, 1935, and Ser. No. 38,044, ñledAugust
bed, when a tangle occurs, or when excessive is provided withV an insert of an insulated mate
tension arises which.v might tend to cause brealcz-k _ rial» at> the position where it is normally ,con-V
tacted with the spring linger.` f
'
,i . j
»
20 age» if the machine were allowed to continue
operation.
~
‘
'
In these applications the yarn is caused to
pass over one or more pivotally mountedguide
devices, which are so constructed> as yto release the>
25 yarn or thread when excessive tension arises.
This 'release of the yarn or thread-will in turn
permit the vpivotal device to swing back actuating
a stop ymechanism which may be mechanically
guide ñnger is released, by` the yarn-'or is dee
pressedr by excessive tension uponthe yarn, con 2.5,.
tact will be established and fthe_,circuit will be
actuated
The yarn
which
before
will or
vstopwhile
the machine.,V74
passing over " i sai
pivotal guidewñnger preferably -passes‘through a --
or electrically controlled.
30.
,» vAs >a result'the circuit will be, opened l,when the.
Athread `or yarn Iis ,running with vthe,„proper ten
sion over the yspring linger. .» When, however,'the
In said prior applications, the thread may be
preferably tensioned by a spring or by a weight>
before itpasses over the main guide on the piv
otal element, ,and-,ifdesired a pivotal guide ele
ñxedguide and a ten’sioningmem‘ber, said guide4
being _of such a character as ltocausextheyarn
to> be properly Idirected onto the ypivotal ñnger
during feeding thereof and-so as Ato set'up‘- a sat-¿f
ment may be provided in association'with the ' isfactory tension upon thel yarn'l to cause; it to ~
35
drag element.
v
normally press the lever to operating position.
i
onitsway'to the needle bed of the knitting ma?
nism of the type above described, vand which »al-1
40
though electrically controlled, will not' be Sub-`
jected to derangement because of the collection
of lint, dirt or dust` preventing proper
contacts and circuit-closures. '
g
electrical”
_
.
' Another object4 is to provide electrical stop'mo
tion of the type above described in which the
45 construction will 'be most compact and most
readily threaded at the initiation of- operation or
toy restartvk the machine' after a stoppage, even .
though the stop motion mechanism be positioned.
at a considerable height. -
f
Other objects will appear during the course .of
the following specification.
According to one preferred construction, a sin- '
gle pivotal guide is provided which takes the
chine which guide, however, should. `cooperate.
with the stop motion in case of breakage between»
the needle bed and the guide with thefresultï 40,
that the guide finger will be` released toclose the`
stop actuating
circuit.
.
.
`
,
v
-
' If', desired, it is also possibleto- insertïaîlight
signal to indicate which one of thestop motions .Y
has been used to stop the machine in' the'pro
posed
construction-‘1
,
,
'
V
.
45"
‘
'I‘he above and other objects will app-earfmoreA
clearly from the following detailed description,
which when taken in connection'withthe accom#`
panying drawings, will illustratepreferred;em-v 5.9;
bodiments of the inventive idea. > 1
y
I
Figure 1 is a side, view of’an upper' structure
of a knitting‘machinefwith one of »the stopmo,-`
tion _mechanisms in position thereon.~ „»_
1
form of va substantially ,horizontal linger on the
55 end of- a lever. The lever is normally lightly ten
35;
, The yarn may also pass `over another guide
' Itis among the `>objectsof the present inven
tion to design an improved stop motion mecha
'
„Figure 2, is a side >„sectional íview -ofn‘thefstop 5% Í
2
2,121,964
motion mechanism on the line 2-2 of Figure 1
upon enlarged scale.
Figure 3 is a top View upon the line 3-3 of
Figure 2 with the cover of the stop motion mech
anism removed.
Figure 4 is a side sectional View upon the line
4-4 of Figure 3 showing a portion of the stop
motion mechanism.
Figure 5 is a side view upon the line 5--5 of
10 Figure 2 with the cover of the mechanism re
moved.
Figure 6 is a fragmentary side sectional view
upon the line 6-6 of Figure 7, showing the guide
mechanism.
15
Figure 7 is a fragmentary side sectional view
upon the line ‘l-'I of Figure 6.'
Figure 8 is a side View of the mechanism upon
the line 8_8 of Figure 1 upon a slightly enlarged
scale.
20
Figure 10; Figure 10 is a top view along the line
IIJ-I0 of Figure 9 with the cover of the device
25 removed; Figure 11 is a fragmentary front view
partly in section along the line II--Il of Fig
ure 9 and Figure 12 is a horizontal fragmentary
view along the line l2-I2 of Figure 9.
Referring to Figure l, the knitting machine in
30 dicated diagrammatically at A, is provided with
the usual revolving thread guide structure and
reciprocating 'needle bed structure (not specifi
cally shown), the thread guide structure and the
reciprocating needles being supplied with yarn
from the cones indicated diagrammatically `some
-
'
l
The cones, which encircle the structure, are car
ried by the column C which is part of the rotat
ing structure.
40
' f
`
The column C carriesV a head D which in turn
supports the stop motion mechanisms El-to which
the present invention is particularly directed.
The yarn F passes from the supply B to the
45
guide G into which it is readily threaded.
From the g‘uide G, theryarn passes over the
guide arm H. Y It then finally passes through the
guide I to the knitting machine A. '
ï Referring particularly to Figures 2 to 5, the
stop motion mechanism is provided with a base
plate I0, which may be made of aluminum die
casting or some other die casting of light metal
which base plate I0 is provided with a protuber
ance Il which is tapped, as indicated best at l2
in Figure 5. The cover 9 is connected to the
55 threaded post 'I by the nut `8.
The stop motion mechanism is connected to
the rod I3 by said tapped recess I2, as best shown
in Figure 5.
.
Extending upwardly from the’plate I0 are the
60 side plates I4 which may be made integrally, if
desired, with the base plate I0.
23 by means of the inset 33.
.
The arm is provided with a bend 30 adjacent its
end and at its end, as best shown in Figure 2, it
carries a porcelain guide sleeve element which
is concaved at 32 more readily to receive the yarn
F
t
The other end of the arm 29 is provided with
a mushroom-shaped enlargement 34 (see par
ticularly Figure 2) which contacts With the end 10
35 of the bar 36.
"
The shaft 3l carries the bar 36 andA it is
,threaded throughout its length and is screwed
through the side plates I4. The bar 36 is tapped
where it is received upon said shaft 31.
15
The bar 36 is provided with a dependent ele
ment 38 carrying an eye 39 to which is connect
ed the coil spring 40. The coil spring' 49 at its
other end `is connected to the eye 4I carried on
~
Figures 9 to 12 illustrate an alternative em
bodiment in which Figure 9 is a'longitudinal sec
tion through the device upon the line 9-9 of
what out of position'at B.
curved portion 28 is held in position in the groove
l
These side plates I4 carry the pivot mounts
I5, which are screwed into Atapped openings in
the said plates I4, as indicated at vI6'in Figure 5.
The pivot mounts I5 areprovided with the
pivot points Il and they are locked in position
by the lock nuts I3. '
The pivot points I'I press into and hold the
shaft I9, which is provided with a' series of re
70 ' cesses or grooves 2l, 22 and. 23 and a transverse
VThese recesses form a series of protuberances
24, 25, 26 and 2'I (see particularly Figure 5).
In the recessw23 is fixed the curved portion 28v
75 of the arm 29 >ofthe" movable guide H. The
the flange 42 of the plate 43.
20
The plate 43 is provided with `an extension 44,
as indicated in Figure 4, which ñts under a rear
wardly extending leg 45 of the side frame mem
ber I4. The screw 46 forming a pivot mount for
said plate 43. The plate 43 may be adjusted by 25
means of the rod 4l which is threaded through
the lugs 48 and 49 (see Figure 2) and is provided
with a downwardly bent portion 56 having a
coiled end 5I to serve as a handle.
The end 52 of the rod 4‘I abuts the flange 42 30
and by turning the handle portion 5û--5I it is
possible to adjust the tension upon the >coil
spring 40.
`
When the arm H is slightly tensioned down
wardly as the thread or yarn is fed to the knitting 35
machine, the mushroom portion 34 of the lever
29 will contact with the end 35 of the bar 36,
but when the tension is relieved from the guide
H the mushroom 34 will separate from the bar
35, the bar 35 being stopped at its other end and
prevented from following the lever 29 by the stop
screw 53; The screw is threaded through the top
plate 54, which plate may be. made of an insulat
ing material and is screwed onto the sideplates
I4 by the screws 6l.
Y
,
The set screw 53 is locked inv any Idesired posi
tion upon the plate by the lock nuts 55 and 56.
The lever 29 is normally tensioned toward the
45
base plate III by the relatively light spring 51,
which as shown in Figure 4, is connected at one 50
end to the opening 58 in the protuberance 24.
The other end of the spring 5'I is hooked onto
an ear 59 which is adjustably mounted at 6I)`
on the leg 45 >extending rearwardly from the wall
I4
55
The spring 5l is‘ of relatively light tension‘
as compared with the spring 49 so that the lever
29 may be readily depressed by the normal yarn
tension to the point indicated in Figure 2. Be
yond this point, however, it will be necessary for 60
substantial tension uponthe yarn to be exerted
to move the lever 29 in Contact with the bar 36
against the force of the substantially stronger
spring 46.
In the normal balancing position, as indicated 65
in Figure 2, the contact arm 6I at its embossment
62 will contact the insulating piece 63 ñtted in the
axial slot 64.
'
'
The upper end of the arm 6I is turned over as
indicated at 65 and is screwed as indicated at 66
to the top of the plate 54, where electrical con
nection may be made.
`
Electrical connections are usually provided to
the base. I6 and the Contact ’arm 6I so that the
stop. motion ‘circuit Will be established when the 75
3
’ 2,121,964
embossment 62 rides beyond the insulating insert
sistsof a spring pressed disk H9 similar to -disk
89. 'I'his disk is supported on a lever l Il pivot
'ally mounted on the arm H2. >The arm H2 is
563 >either because of the breakage of the yarn F
and release of the arm 29, or because of excessive
tension on the arm 29 tending to press the mush-k
weighted by the adjustable element H3.r
;room 34 against the bar 36 sufficiently to sub
If the yarn F breaks between the‘device I-and
`the machine A, the lever 4l ll would move up~ on
thel right causing `sufficient slack to permitv the
stantially depress the lever 29.
By the rod 41, the screw mount 60 and the ad
justing screw 53, it is possible to adjust the ten
guide H to elevate and close the stop circuit.
sion on the armv29 and the guide H at its various
vided a convenient, inexpensive >and durable
`.normali operation the embossment 62 will ride
,upon _the insulation 63 opening the stop motion
circuit.
,
mechanism which `will actuate under a wide
`variety of conditions to stop the machine.
l
tically every abnormal treatment imposed upon
the yarn. `For example, it ‘will function very
.Gis also so constructed as to enable ready thread
satisfactorily when the tension becomes-too great v
ing of the yarn thereupon by a threading stick,
as is necessary in most textile plants.
Referring to Figures 2 and 5 to 7, the guide G
and it will not be necessary for the cloth -to drop
out before such actuation.
15 depending downwardly
I25
`
breaks orseparates at any appointed position.
The deviceof the present inventionexcels in
the ability to stop theknitting machine Without
‘
necessitating the removal of the yarn 'from the «
>turned extension 18 which carries ,the screw 19
locked in positionbyV the lock nut 88 (see Fig
6).
y
«
v
stopping device, and-this is a marked improve-V
ment over the prior art, since in most cases in the
'
prior art the stop motion will not operate as long
asthe yarn stays in position. This advantage is
The screw carries the shank 8| of the guide disk
30 82, which guide disk 82 is provided with a recess
>83 and with a bevel face 84.
The disk also carries a guide Wire 86l (best shown
in’Figure '1) which at one end 81 fits into the
`disk 82 and at its other end 88 turns rearwardly
35 until it fits into-the arm 18.
'
particularly apparent in case of separation of the 1
thread at any point between the stop-motion de->
vice and the needle bed.
By the utilization of the combination shown-it
' is possible to stop the knitting machine in case of
l
separation of the thread at any point between vthe
Pressing against the inside face of the‘disk 82
>is the cup 89 which is biased by the spring` 90, the
tension of which is adjusted by the adjustable
'210
' cone and the needle bed.
19.
'
`
the knitting machine A.
v
i
`
`
ticularly advantageous inasmuch as it will func-v
tion to stop the knitting machine upon tangling >
~
of the thread, or when normally lodged knots
The guide wire 86 forms a convenient means by
which the yarn F is prevented from moving out
of the recess 83, as shown in Figure '1, when the
yarn is passing from the bobbin or cone B lto
45
’
The device of the'present application is par- ,_
`reaction member 9 I , carried on said. threaded
shaft
occur inthe yarn without there occurring at'any
Vtime a drop- out of Aany considerable degree;v Inv
practically all -instances where the device of the
present application will effectively stop the ma
chine, the operator of 'the machine will'be vable
,
. The wire 86 also guides the thread F, as shown
1‘
to tie on a new thread without any damage to
In operation, the yarn F is first looped over the
y’sleeve32 and then the Wire 88, it may be'readily
50 placed in the recess 83, asbest shown inFi'gure 7;
The normal feeding tension on the yarn across
4the cloth. The'device of the present invention
in the lower'part >of Figure 2. ` .v
‘
may _be made of brass or other materials and it '
the sleeve 32 will depress- the'arm 29 of the guide _ v
p :55
H until the mushroom 34 just barely contacts
with the end 35 of the bar'36, the normal tension
of the yarn being suiîicient to overcome the spring
51, but not to overcome'the spring 40.
'
In -this position, theA circuit is vbroken at the
60 tionA mechanism E, the lever 29 will be released
and the embossment 62 will ride off the insula
tion 63 closing the circuit between the base l0 and
65
'
The -closure of this circuit Will alsorilluminate
the lamp |09, as shown in Figure 5, indicating
to the worker which stop motion mechanism has
been actuated.
i
,
The excessive tension will also give rise to the
same effect by depressing the lever 29 against the
spring 40 acting on the pivotally mounted abut
ment bar
3B.
'
>
'
'
The guide G at all times will function -to feed
the yarn properly upon the sleeve 3 .
- '
VThe guide I will receive the yarn F just before
itreaches the revolving structure A and itcon
maybe-.utilized on flat type or circular knitting
machines utilizing 6, 12 or any other number of 50
threads.
The specific- dimensions of the various springs, lever and so »forthmay be varied from machine to
machine,- and maybe most satisfactorily Vcon
ytrolled in accordance with the character -and :.55
strength of the yarn.
"
y
'
_ By utilization of a 'combination «of nxed and
insulation 63, as indicated at Figure 4.y .Y
. When the thread breaks beyond the stop mo
the arm 6|, stopping the machine.
'
a loose end runs out and/or when the thread
The arm -is also provided with a further in
ure
' `
Í Moreover, it will most readily function when
from the base plate l0, which arm has an inturned
portion 16 carrying the sheet metal cover 11 (see
r
,
-,application will satisfactorily provide fortprac
sleeve 3l of the guide H in a proper fashion, the
guide element G is provided, which guide element
Figure 2) .
„
l10
The device shown and described in the'present
To assure that the thread be guided on tov the
is. carried» on an arm
j
It is thus evident that the applicant has pro-`
positions during the operation, so that .during
pivoted rguides'as vshown in the present applica
tion, it is not only possible to stop the knitting
machine when the yarn breaks but generally the 60
machine will be stopped' before the yarn breaks,
when- they tension upon the yarn becomes such as
to ’upsetl the pivoted guides
and permit release of `
the yarn. , Although the pivoted members >are
provided. with adjustable springs, it may be de 65
sirable in'some instances to make the springs in
adjustable;>> Weights if desired may be used with
or
addition to- springs.
¿
î
y
y
e,
'
't In the embodiment of Figures 9 to 12 is shown
in alternative form of stop motion mechanism, in 730
whichl similarlyfunctioning parts v.are designated
byy thesarne numerals as Figures l to> 8, however,
Ä.,
.
.
f
,
'
I.,
. -: fln Figure 9,1_the bo'xlike Containern’. is'prv
È:
"
‘2,121,964
4
to tangling or because the yarn will not come off
the cone or for other reasons, the lever ||6 will
be depressed into the dotted line position as in
dicated at Figure 9.
i At the same time, the portion 34’ of the block
I9’ and 35’ of the block 36' will contact which
will -result in movement of the wire fingers ||1
'vided with a cover 9’ held in position by means
of the flanges on said cover 8’.
.
Y The guide lever H' takes the form of a plate
| I5 which is slotted as indicated at ||6 into which
slots Adepend the wire fingers ||1.
The wire fingers ||1 extend downwardly, as
indicated at ||8, then upwardly as indicated at
into the dotted line position, as shown in Fig
I I9, to form a hump and finally downwardly as in
ure‘9.
dicated at |20.
thefplate ||5 are so positioned that there will' be
recesses | I4 formed between them through which
the yarn F' passes.
yarn being forced off the fingers | I6 and released.
This will give an eXtra length of yarn for the
machine to operate on during the time the stop
motion mechanism is operating lessening the fall
outs and defects in the cloth being produced.
During this depression of the lever ||6’, the
block I9' will be elevated to contact the end |20
of the spring and cause a circuit through the
The lever | I6 has a rear extension as indicated
20
'
This movement of the fingers ||1 and particu
larly their lower portions |20 will result in the
During normal operation, the ñngers ||1 >and
at 29' in Figures 9 and 10 and is connected to
the block I9’ which is `pivotally mounted at I5'.
The >extension 28' of the arm H’ is clamped be
neath the adjustable weight |28 which is held in
position by means oi the screw |29.
The block I9' during operation is normally
conduit |21 and thereby stopping the mechanism. 20
In case this contact does not take place sulfi
ciently to assure this energization of the circuit
|21, the lever | I6 uponbeing released will imme
diately elevate under the ends of the adjustable
weight |28 causing the block I9’ to strike the
balanced between the contacts ||9 and |20, the
contact ||9 consisting of a nut which is screwed
on to the end of the bolt |23, said bolt being in
sulated from the casing I0’ byV means of the
|25 and the sleeve |24.
25 washers
The contact |20 consists of the outstanding end
nut IIS’ and again establish the stopping circuit.
Usually, however, there will be suiiìcient con
tact between the block I9’ and the element |20
Vto cause such stoppage.
The weight of the block I9’ and of the adjust 30
ing member |28 are usually so regulated that the
block |9’ willbang against the nut ||9 when re
leased either due to breakage of yarn F’ or due
35' of the block 36’ which is pivotally mounted to removal of the yarn F' from the lever ||6’ as
35
on the shaft 31’.
indicated in dotted line position in Figure 9.
The
block
is
provided
with
the
upstanding
ele
This
will
clear
the
nut
|
I9
of
any
lint
and
will
35 ment 38’ having an eyelet 39’ to which is con
assure that proper contact take place to energize
nected the biasing spring 40’.
circuit |21.
The other end of the spring is connected to the theThe
amount of movement of the lingers l |1 and
flange 4|’ ci the plate 43’ which is pivotally the point at which they are moved forward to
mounted at 46’.
dotted line position by `the lever >|||ì may be
The adjusting screw 41’ provided with the controlled by means of the stop screw 53'.
handle 50’-5 | ’ is threaded through the block 49’.
~ The tension on the lever | I6 may be regulated
The motion of the block 36’ is stopped by the by adjustment of the angular position of the
adjustable screw or stopr53’ provided with the weight |28. The tension on the spring 40', resist
lock
nut 56'.
ing movement of the lever I I6 from solid to dotted
45 The
lock nut 56’ holds the upper ends |30 of line position as indicated in` Figure 9, may be ad
the wires ||1 rigidly in respect to the block 36'. justed by means of the threaded member 41’.
In operation, the lever IIB may be readily de
It will be noted in the present construction `that
pressed below the bottom of the return bend por
the applicant eliminates the fixed guide G of 50
tions | I8 to permit the yarn` F’ to be moved `rear
Figures 1 to 8 with the result that the yarn F’
50 wardly until it contacts the downwardly extend
only has to be threaded to start‘the machine upon
ing portions |20 of the fingers | |1.
a single lever H'.
Atthis time, the lever | I6 will be slightly above
The operation of `threading the yarn F’ on the
the dotted line position in Figure 9. Then the lever H’ so that it gets beneath the humps I9 55
lever ||6 is permitted to move upwardly under
55 the action of the spring 40 whereupon the yarn is relatively simple and may be readily performed
by the operator of the knitting machine.
F’ will be secured between the top oi the hump
It will be noted that the weight |28 of the
I|9 and the lever ||6 in the space indicated at block I9’ of Figure?) replaces the spring 51 of
| I4 of Figure 9.
Figures 1 to 3; it is also possible, if desired, to 60
During the operation, the yarn F' being in the replace the other spring 40’ by weight means,
60
position shown in Figure 9 in solid lines will pre
as indicated in my earlier applications, above
vent the lever I I6 from elevating to such a posi
referred
to.
tion that the block I9’ will contact the nut ||9
If Ydesired elements | |1-l |8--| |9--|20 may be
and close the circuit through the conduit |21.
fixed instead of movable b-y attaching these ele 65
We note particularly by reference to Figure l0 ments directly to the box l0' or by casting the
65
that the yarn rests upon the upper surface of elements ||1 to |20 integrally with the box |0';
of a closely wound coil spring |2|, the lower end
of which is held by the nut | I9 under the washer
|26 which also is connected to the end of the elec
30 trical conduit |21.
Excessive downward movement of the lever ||6
causes its end portion Mito-contact with the end
the lever 1-1’ with which it has three points of
Contact at |3T and below the humps ||9 with
which it has two points of contact indicated at
70
|32.
A
.
If, however, the yarn F' breaks or falls away
from the stop mechanism of Figures 9 to 12, the
lever ||6 will elevate depressing the block |9’
also .the relative position of the elements I9’ and
36’ may be reversed with the element 36" being
positioned above the element I9', the Contact be 70
tween the elements I9' and 36 being arranged
at the other side of the fulcrum I5’ with'the
pivots |5' and 31’ being laterally disposed as
indicated..
until it contacts the nut ||9.
75
i
-
- Y
When the tension -on the yarn is excessive due
`
It> isto loe-understood that many changes and 75
2,121,964
variations may be lmade in the present invention
without departing from the essence or sco-pe
thereof and it is intended to include all such
‘ 5
y
iixed element upon movement of said guide away
from said predetermined balancing position and
a looped lever cooperating with said movable
variations and modifications in the scope of the , guide provided with an extension to limit inser
tion of the yarn/upon said guide, the loop of said
appended claims.
~ lever serving to hold said yarn upon said guide
What is claimed is:
1. Ina stop motion mechanism for knitting when said guide is in said normal balancing
machines, a base, means 'carried by said base to position, said movable guide being slotted to re
'
A
engage a rod extending-outwardly from the head ceive said looped lever.
4.> A stopvmotion mechanism for knitting ma
10 of the machine, side Wall members carried by
said base, a plurality of shafts carried by said chines comprising a movable guide designed to
be balanced in a predetermined position during
side wall members, a pivoted .guide member con
nected to one shaft having an outstanding arm, normal operation of the machine by the yarn
the end of which is designed to receive the yarn passing thereover, a movable contact element, a
fixed contact element, connections vbetween said
15 being fed to the machine, said shaft also receiv
ing a movable contact element moving with said guide and said movable element to cause said
movable element to move into contact with said
pivotedv guide, a fixed contact element cooperat
fixed element upon movement oi said guide away
ing with said movable contact. element, a take
from-said predetermined `balancing position and
up device attached to said second shaft, an ad
a looped lever cooperating with said movable
justable spring resisting movement of said take
guide provided with an extension to limit inser
» up device in one direction, and adjustable stop
limiting its movement in the other direction tion of the yarn upon said guide, the loop oi said
means to guide saidV yarn upon‘said lever, said lever serving to hold said yarn upon said guide
` leverrbeing balanced by normal tension upon said when said guide is in said normal balancing
yarn to control said movable contact so that an position, said movable guideconsisting of a sub
electrical circuit will not be established in respect stantially horizontal blade provided with parallel
to said fixed’ contact, said take-up‘device and slots and said loop lever being provided with two
said adjustable spring resisting movement of parallel portions fitting in said slots.
5. A stop motion mechanism for knitting ma
'said lever in the direction it tends to move under
chines Vcomprising a movable guide designed to
excessive tension of the yarn.
,
be balanced in a predetermined position during
' 2. A stop motion mechanism for knitting ma
chines comprising a movable guide designed to normal operation of the machine by the yarn
be balanced in a.' predetermined position during passing thereover, a movable contact element, a
normal operation of the machine by the yarn ñxed contact eleme-nt, connections'between said
35 passing thereover, a movable contact element, guide and said movable element to cause said
a iìxed contact element, connections between said movable element to move into contact with said
Vguide and said movable element to cause` said ñxed element upon movement of said guide away
movable element to move into contact with said from said predetermined balancing position land
ñxed element upon movement of said guide away. ‘a looped lever'cooperating with said movable
from
said predetermined balancing position and v guide provided with an extension to limit inser
40
a looped lever cooperating with said movable tion of the yarn upon said guide, the loop of
said lever' serving to hold said yarn upon said
guide provided with an extension t'o limit inser
tion of the yarn upon said guide, the loop of said "guide when said guide is in said normal balanc
lever serving lto hold said yarn upon said guide ing position, said movable guide consisting of a
plate having a plurality of slots therein over
when said guide is in said rnormal balancing posi
45 tion.
which said plate the yarn passes and said looped
`
3. A stop motion mechanism for knitting ma- " lever consisting of a plurality of fingers received
chines comprising a’movableguide designed to in slots in said plate, said looped lever being
be balanced in a predetermined position during actuated by movement of said movable guide to
normal operation of .the machine by the yarn lift said lingers out of said slotsvwhen said guide
passing thereover', a movable contact element, a is subjected to: movement by 'excessive yarn
fixed contact element, connections between said
guide and said movable element to cause said
movable elementv to move into contact with said
tension.
^
'
.
~
JOE W. HAMILTON.
10
15
20
30
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40
i
45k
50
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