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Патент USA US2411795

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Nov. 26, 1946.
R. H.? LAWSON
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' 2,411,795
RACKING MECHANISM FOR KNITTING MACHINES
vF-ilec?l Nov. 10,? 1944 '
W/r/MSS: . 7X
F762. Q
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2 Sheets-Sheet l
~ fPpierzz/qLawson
Nov. 26, 1946.
R, HjLAwsoN
2,411,795
RACKING MECHANISM FOR KNITTING MA_CHII\IIES
'
Filed Nov. .10, 1944
?
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2 Sheets-Sheet 2 '
? F7614.
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aim
2,411,795
Patented Nov. 26, 1946
UNITED STATES PATENT OFFICE
2,411,?? 95
BACKING MECHANISM FOR KNITTING
.
MACHINES
Robert H. Lawson, Laconia, N. H., assignor to
Scott & Williams, Incorporated, Laconia, N. H.,
a corporation of Massachusetts
Application November 10, 1944, Serial No. 562,809
19 Claims. (01. 66?50)
1
This invention relates to racking means for
a trick Wheel or other cyclically operating mech
anism of a knitting machine.
Knitting machines are commonly provided with
trick Wheels which carry in axially extending
slots jacks containing butts arranged in prede
termined fashions to control the production of
2
,
sir-able to have provision made for single or dou
ble advances of the trick wheel, desirably under
the control of the trick wheel itself, so that it
will complete a cycle during the desired number
of courses.
The above motions and controls of a trick Wheel
are known in the art.
Ordinarily, trick wheels of the type indicated
patterns. Such trick wheels are required to pass
are advanced by conventional ratchet and pawl
through successive cycles to form repetitions of
the controlled pattern and, are subject to spe 10 mechanisms. The disadvantage of the use of such
mechanisms is that coupled with the rapidity of
cial controlling actions. For example, in the
movement which is required is a tendency toward
usual operation the trick wheel is advanced one
overrunning which if it occurs will obviously de
step in each course of knitting to present a dif
stroy the intended pattern in the stocking. To
ferent array of butts to the controlled elements.
This action generally occurs constantly during 15 prevent overrunning friction is generally applied
to the pattern drum or trick wheel which is being
the knitting of the leg of a stocking. When the
racked and this in turn imposes a resistance to
knitting of a heel begins the instep needles in
movement of the racking mechanism Which, if
the machine are thrown out of action, to be later
racking is effected by means connected to the
restored to action during the knitting of the
foot. Ordinarily the pattern running along the 20 cylinder of the machine, will set up objectionable
vibration.? This may be eliminated if, by pre
leg should be continued without interruption
vention of overrun, the necessity of putting fric
through the instep of the stocking. Consequent
tion on the drum is eliminated.
ly, the trick wheel should not advance during
Furthermore, any tendency towards overrun
the knitting of the heel. During the formation
of the foot the advance of the trick wheel should 25 requires a corresponding greater distance between
steps of the drum. If overrun can be prevented,
be the same as during the knitting of the leg.
the angular range of each step may be reduced,
Again, when the toe is reached, it is generally
with consequent narrowing of the lap of the pat
desirable to stop the advance of the trick wheel
tern where change occurs and the possibility of
while the machine effects reciprocatory knitting.
At the end of such reciprocatory knitting no fur 30 providing for more drum moves with a drum of
given diameter.
.
ther controlling actions by the trick wheel are
One object of the present invention is the pro
generally desired unti1 the beginning of the knit
vision ?of a racking mechanism for a knitting ma
ting of the leg of the next stocking. Ordinarily,
chine which is positive in its action in prevention
when the trick wheel advance is stopped at the
beginning of the knitting of the toe it will not be 35 of overrunning movements and thus makes pos
sible attaining of the advantages just noted. A
in the desired position for the resumption of con
further'object of the invention is the provision
trol during the knitting of the leg of the next
of a racking mechanism of this type which is
, stocking. Consequently, it is necessary that the
trick wheel be timed up and then come to rest
- capable of controlled action to secure the neces
in a de?nite position to secure a proper pattern 40 sary stopping of a rotary member, the timing
controlling action in the next stocking. This is
thereof, and single or double advances thereof,
generally accomplished by causing the trick wheel
as indicated above.
to be advanced during the knitting cf the loopers
rounds or waste courses of the Stocking,
~
'
These and other objects of the invention re
lating particularly to details will become appar
It will be evident that for the formation of 45 ent from the following description read in con
junction with? the accompanying drawings in
the most elaborate patterns which are required,
which:
'
the trick w_heel should contain a maximum num
Figure l- is a fragmentary plan View, partly dia
ber of jacks. Since this number is ?xed by the
grammatic illustrating the application of the in
slots in the trick Wheel, it will be evident that a
serious limitation on the extent of the pattern 50 vention to drive of a trick wheel of a knitting
would be imposed if the number of courses in
machine;
Figure 2 is a fragmentary illustration showing
volved in a repeat of the pattern had to be equal
the means for eifecting control from the main
to the number of slots in the trick wheel or some
submultiple thereof. To secure patterns having
cam drum of the machine;
repeats of different numbers of courses, it is de 55 Figure 3 is a plan view, partly in section, simi
2,411,795
3
4
.
lar to Figure 1 but showing certain parts above
those illustrated in Figure l; and
ed for horizontal movement in suitable guides in
the machine frame.
Figure 4 is an elevation looking at the right
hand side of Figure 1 and the lower side of Fig
tion Q2, which is arranged to be engaged by butts
ure 3.
which are located in a particular level, for ex
Referring ?rst to Figure l, the location of the
rotary needle cylinder of a knitting machine is
The slide 98 is provided with a follower por
ample, the lowermost level 94, of butts in the
trick wheel.
During the knitting of a leg of a stocking, the
indicated at 2. Rotating with this, for example,
cam '56 on the main cam drum e?ects the location
by reason of its being secured to the cylinder
gear, is a earn 4 which during rotary knitting 10 of the lever 43 in the position illustrated in Fig
moves in the direction indicated by the arrows
6. A bell crank 8 having a ?xed pivot at ID is ar
ranged to be acted upon by the earn 4 to cause
its end It? to engage and move the adjustable
screw it; carried by the lever it having a ?xed
pivot at H3. A spring 69 urges the lever IS in a
clockwise direction to maintain its screw H1 in
contact with bell crank 8 up to a limiting position
de?ned by contact of a stop screw 22 with a ?xed
ure 1.
The space between the steps 42 and Q6 is lo
cated in the path of the lug 41} so that this lug
has a full range of movement without interfer
ence by the lever 43 when the bell crank 8 is swung
and released by the cam 4 during each rotation
of the needle cylinder corresponding to the forma
tion of each course of the leg. Disregarding for
the moment the action of the lever 86, the effect
20 of the foregoing is to advance the trick wheel 38
pin indicated at 26.
through a double step upon each revolution of
Pivoted at ?ill'to the lever 955 is a gear segment
the needle cylinder, such double steps correspond
26 provided with teeth at 28. An adjustable ec
ing to the angular spacing of two teeth of the
centric stop pin 39 is arranged behind the seg
gear 56 and to the angular spacing of two jacks
ment 23 as indicated to limit clockwise move
in the trick wheel. Starting from the position il
ment of the segment with respect to the ?xed
lustrated in Figure 1 this is eiiected in the fol
parts of the machine. An adjustable screw 32
lowing-?manner: The pivot 24 is arranged to in
carried by the segment is arranged to engage a
lug (it on the arm it to limit clockwise move
volve a substantial degree of friction. When the
ment of the segment relative to the arm about
lever l6 occupies its extreme clockwise position
as illustrated due to the extreme counterclock
the pivot 21%.
wise position of bell crank 8, the segment 25 will
have been positioned by engagement with the
stop 3%. As the bell crank 8 rides upwardly on
the cam Q, the lever i6 is rocked counterclock
wise and during such rocking movement, due to
the friction action mentioned, the angular rela
tionship between the segment 26 and lever I6 is
maintained with the result that a predetermined
meshing of the segment 28 and the gear 35 takes
place. Following a completion of meshing, the
continued counterclockwise movement of the
A gear 36 mounted to rotate about a center 31
carries the trick wheel 38, which may be of the
conventional type commonly provided in knitting
machines and consisting of a slotted cylinder in
which jacks 39 may be located having butts 4!
arranged at various levels and in various arrange
ments at said levels.
The bell crank 8 carries a lug 4E3 upstanding
therefrom which has a range of movement, upon
oscillation of the bell crank 8, between the posi
tion shown in full lines at 49 and the position
shown in dotted lines at �?. A lever (l3 pivoted
upon a ?xed post 58 is provided with an opening
M which has a series of steps 62, 4M and 46 which
in various phases of the operation are adapted
to be engaged 'by the lug �. A spring 58 urges
the lever 43 in a counterclockwise direction
against the pull which is produced through a
Bowden wire and a spring 51! which is of su?i
cient strength to overcome the spring so. As,
indicated in Figure 2, the opposite end of the
Bowden wire is secured to an arm $32 extending
from a push rod ?613 which is adapted to be raised
levers it?: will cause a widening of the angle be
tween the segment 26 and the lever 56 resulting
in there being imparted to the gear 36 a move
ment equivalent to the angular spacing of two
teeth of the gear. The limit of this movement
occurs when the screw 32 engages the lug 34
which should coincide substantially with the bell
crank S reaching the top of the cam 4. Actually,
the arresting action may occur just slightly prior
to this, the resilience of the parts permitting the
by the action of cams on a lever 63. The cams
which act upon the lever 66 are carried by the
main cam drum of the machine and may com
cam 1% to pass the bell crank 8.
As the bell crank is released by the cam, the
lever i5 moves clockwise under the action of the
? spring ill, to a position limited by engagement
of the screw 22 with the stop pin 26. At the
prise, for the knitting of a conventional stocking,
beginning of this movement the vsegment 26
a cam '98 which acts upon the follower lever 65
moves, due to the friction at the pivot 25, as
during the knitting of a leg, a cam 72 which acts
an integral part of the lever I6, out of mesh with
upon the lever during the knitting of a heel, cam 60 gear
until it engages the stop 30 whereupon
M which is active during the knitting of the foot,
?earn ?it active during toe knitting and the space
?Z8 which may be provided by the face of the drum
and which is effective during knitting of the
loopers rounds to effect timing.
7
Referring to Figure 3, there is indicated there
in a second lever Bil which is also pivoted upon
the post 43 above the lever Q3. This lever is pro
vided with a step 32 which, as will be evident
from the ?gures, is adapted to move in the same
path as the step #22 in cooperating with the lug
til. A spring 8% urges the lever 8!! in a counter
clockwise direction to bring an adjustable stop
screw 36 carried by the lever into engagement
with the downturned end 88 of a slide 98 mount 75
it is arrested, and further movement of the lever
it? to its ?nal position results in decrease of the
angle between the segment and the lever. The
parts are thus returned to the original position
first described preparatory to the next action by
the cam 閘 which results in meshing of the seg
ment with the gear.
In moving outwardly the
segment so moves that its teeth leave those of
gear
without tendency to impart either back
ward of forward movement to the gear.
This result is attained by such relative arrange
ment of the parts that movement occurs sub
stantially along a line joining the center of gear
36 with the center of curvature of the segment.
The above action occurs so long as a butt 94
l 2,411,795
would be su?'icient to permit the step.? to be
brought into the path of the lug 40. However,
engages the slide 90 to maintain the shoulder 82
of lever 89 out of the path of the lug M3.? In the
absence of a butt 94 acting on the slide?li, the
step 82 will be in the path of lug llaandconse
movement'of the lever 43 does not occur to this
extent inasmuch as the pin 52 carried by it will
drop to the position 52' into engagement with the
quently, when the bell crank is released bythe
cam 4 its counterclockwise movement is limited
circular edge of the cam disc 54. When this oc
cursthe step 42 is brought into the path of the
tothe end that the lever I ii is arrested� short
of its extreme clockwise position i. e.,' the screw
lug?40.
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.
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;
.
As previously pointed out, the step 42 bears
22 is, in its ?nal position, spaced from the stop
pin 28.? Under these conditions the angle b-e- 10 the same relationship .to the lug do as the step
82 of the lever .80, preventing the bell crank t
tween the segment'ZG and the lever is will be
_ from moving to its normal counterclockwise po
greater than before so that when the lever it next
sition and thus limiting the extent to which the
~moves ?counterclockwise, due I to the action of
?cam 4, meshing will not occur two teeth behind
lever [B maymove clockwise. As a consequence,
be imparted to the gear 36 an angular move
ment through the spacing of only a single tooth,
, the lever 80 which may be moved by the action .of
the previous point of meshing but only one tooth 15 irrespective of the butt arrangement at 9!; on the
trick wheel, and irrespective of the position of
behind that point. As a consequence, there will
such butts, the movements of the parts are such
> or in other Words, the trick wheel Will have im
parted thereto a single ?step.
20
The result of the above is that, by reason of a
predetermined arrangement of butts M, a particu
lar-succession of single and double steps may be
imparted to the trick wheel to result in its com
plete rotation during the occurrence of various
numbers of courses of knittingwiththe ?result
that only single steps of the trick wheel may oc
cur. Such single steps are for the purpose of
advancing the trick wheel toward its initial posi
tion for the beginning of the pattern in the leg
of the next stocking. It may be noted that cam
16 may be omitted, in which case this retiming
phase of the operation may begin simultaneously
with the beginning of knitting of the toe.
?The. single step advances continue until the
notch 56 reaches the position 52' of the pin 52.
that within wide limits the cycle of repetition of
the pattern may be'varied. It will be noted'that
As soon as the pin 52 is free to drop into the
in either case it is impossible for the gear 36 to
overrun the movement imparted to it by the seg 30 notch, the spring 59 moves the lever 43 further in
a counterclockwise direction tobring the step
ment 26, since at the end of the advancing move
44 into the path of the lug 49 as soon as the
ment, the segment and the gear are in mesh and
bell crank 8 is moved clockwise after the pin
the gear is de?nitely brought to rest before release
drops into the notch. The step 44 then occupies
of the gear by the segment can occur. The gear
36 cannot possibly force the segment 23 out of 35 the same position as the step 43 occupied dur
ing heel and toe knitting, with the result that
mesh since the segment is effectively rigid with
the racking is completely interrupted, the trick
the lever It at the end of the racking movement
wheel being locked in position by the segment?�,
by reason of engagement of screw 32 with the lug
in preparation for properly timed control in the
34.
.
In order to arrest the motion of the trickwheel 40 knitting of the next stocking.
This locked condition continues until the fol
I during the knitting of the heel, the cam 12 pro
duces a pull on the Bowden wire to urge the lever
43 in a clockwise direction under the action of
the'spring 69; The timing is such that the rise
lower 65 rises on the cam 10, whereupon the lever
43 is again moved clockwise to clear both steps
44 and 42 from the path of the lug [iii so that the
of the follower lever 66 on the cam 12 occurs when
racking operations may be resumed.
the bellcrank B is not being acted upon by the
It may be noted that, if desired, by a proper
shaping 0f cam ll the lever 8 may be rocked to
effect advance of the trick wheel during both for
ward and reverse strokes of the needle cylinder
cam 4. As a consequence, the side of the step 56
?rst engages the lug lit, the spring so yielding
when such engagement occurs. As soon as the
?bell crank 8 rides up the cam 4 so that the lug ,
40 clears the step so, the step will then besnapped
behind the lug so that counterclockwise movement
of the bell crank 8 is prevented even though it
' is released by the cam 4. Asa result, during the
during reciprocation. In this fashion patterning
may be accomplished, for example, during the
knitting of split work.
What I claim and desire to protect by Letters
formation of the heel, the segment 26 is?held in
Patent is:
1. In a knitting machine,rotary means includ
? mesh with the gear 35 retaining the trick wheel
ing a? toothed member, a first lever, means for im
in ?xed position despite continued movement of
the needle cylinder, which during, formation of
the heel, will be reciprocatory.
parting oscillatory motions to said lever, a second _
lever having at least� one tooth engageable with
teeth of the toothed member, the second ?lever
When circular knitting is resumed through the 60v being pivoted to the ?rstllever but being re
'i'root, the follower 66 drops off cam ?l2 upon the
_ strained from free angular movement relative
' cam ?M resulting in return of the lever 43 to the
' ' thereto, ajstop engageable by the second lever to
identical position which'it occupied during the
knitting ofthe leg. Normal advances of the trick
1 limit movement thereof away from the toothed
_ wheel through single or double steps may then
? take place to continue? the pattern through the
foot.
,
v
r
_
.
?
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When the, knitting of the toe' is reached, the
cam ?I6 acts identically as would the cam 12 during
member, and? stop means for limiting angular
movementof thesecond lever relative to the'?rst
in one direction, so that during an oscillation of
the?rst lever in, one direction the second lever
?rst moves therewith to cause its tooth to mesh
with said toothed member and then moves angu
?the heel formation. Accordingly, the advance of 70 larly relatively thereto to; a position limited by
said stop means to? impart an advancing move
the trick wheel is again "arrested, the trick wheel
being locked in position by the segment.
'
' Following the knitting of the toe and beginning
ment to said toothed member, and so that during
an oscillation. of the ?rst lever in the reverse di
rection the second lever ?rst moves therewith to
of the knitting-of the loopers rounds, the lever
li??drops upon the drum face at 18. vThis drop' 75 ?disengage the toothfrom'the toothed member I
2,411,795
? 7
and then engages said stop to be retarded there
by to establish a de?nite angular relationship be
tween the levers at the end of the movement of
the ?rst lever.
?
tween the lever and element at the end of move
ment of the element, and means for varying the
extent of oscillation of the element to control the
advance of the toothed member.
5. In a knitting machine, rotary means includ
ing a toothed member, an oscillating element,
means for imparting oscillatory motions to said
2. In a knitting machine, rotary means includ
ing a toothed member, a ?rst lever, means for im
parting oscillatory motions to said lever, a sec
, element, a lever having at least one tooth engage
ond lever having at least one tooth engageable
able with teeth of the toothed member, the lever
with teeth of the toothed member, the second le
ver being pivoted to the ?rst lever but being fric 10 being pivoted to said element but being restrained
tionally restrained from free angular movement
relative thereto, a stop engageable by the second
from free angular movement relative thereto, a
stop engageable by the lever to limit movement
thereof away from the toothed member, stop
means for limiting angular movement of the lever
lever to limit movement thereof away from the
toothed member, and stop means for limiting an
gular movement of the second lever relative to the 15 relative to the element in one direction, so that
during an oscillation of the element in one direc
?rst in one direction, so that during an oscillation
tion the lever ?rst moves therewith to cause its
of the ?rst lever in one direction the second lever
tooth to mesh with said toothed member and then
?rst moves therewith to cause its tooth to mesh
moves angularly relatively thereto to a position
with said toothed member and then moves angu
limited by said stop means to impart an advanc
larly relatively thereto to a position limited by said
ing movement to said toothed member, and so
stop means to impart an advancing movement to
that during an oscillation of the element in the
said toothed member, and so that during an oscil
reverse direction the lever ?rst moves therewith
lation of the ?rst lever in the reverse direction
to disengage the tooth from the toothed member
the second lever ?rst moves therewith to disen
and then engages said stop to be retarded thereby
gage the tooth from the toothed member and
to establish a de?nite angular relationship be
then engages said stop to be retarded thereby to?
tween the lever and element at the end of move
establish a de?nite angular relationship between
ment of the element, means for varying the ex
the levers at the end of the movement of the ?rst
tent of oscillation of the element to control the
lever.
advance of the toothed member, and means ro
3. In a knitting machine, rotary means includ
tating with the toothed member for controlling
ing a toothed member, an oscillating element,
the last named means.
means for imparting oscillatory motions to said
6. In a knitting machine, rotary means in
element, a lever having at least one tooth engage
cluding a toothed member, an oscillating element,
able with teeth of the toothed member, the lever
being pivoted to said element but being restrained
means for imparting oscillatory motions to said
from free angular movement relative thereto, a
element, a lever having at least one tooth engage
able with teeth of the toothed member, the lever
being pivoted to said element but being restrained
from free angular movement relative thereto, a
relative to the element in one direction, so that 40 stop engageable by the lever to limit movement
thereof away from the toothed member, stop
during an oscillation of the element in one direc
means for limiting angular movement of the lever
tion the lever ?rst moves therewith to cause its
stop engageable by the lever to limit movement
thereof away from the toothed member, and stop
means for limiting angular movement of the lever
relative to the element in one direction, so that
tooth to mesh with said toothed member and then
during an oscillation of the element in one direc
moves angularly relatively thereto to a position
limited by said stop means to impart an ad 45 tion the lever ?rst moves therewith to cause its
tooth to mesh with said toothed member and then
vancing movement to said toothed member, and
moves angularly relatively thereto to a position
so that during an oscillation of the element in
limited by said stop means to impart an advancing
the reverse direction the lever ?rst moves there
movement to said toothed member, and so that
with to disengage the tooth from the toothed
member and then engages said stop to be retarded 50 during an oscillation of the element in the reverse
direction the lever ?rst moves therewith to dis
thereby to establish a de?nite angular relation- ~
engage the tooth from the toothed member and
ship between the lever and element at the end
then engages said stop to be retarded thereby to
of movement of the element.
establish a de?nite angular relationship between
4. In a knitting machine, rotary means includ
the lever and element at the end of movement of
ing a toothed member, an oscillating element,
the element, and means including an element
means for imparting oscillatory motions to said
rotating with the toothed member for interrupt
element, a lever having at least one tooth engage
ing oscillatory motions of the ?rst mentioned ele
able with teeth of the toothed member, the lever
ment.
being pivoted to said element but being restrained
'7. In a knitting machine, rotary means in
from free angular movement relative thereto, a 60
cluding a toothed member, an oscillatory element,
stop engageable by the lever to limit movement
means for imparting oscillatory motions to said
thereof away from the toothed member, stop
element, a lever having at least one? tooth en
means for limiting angular movement of the lever
gageable with teeth of the toothed member, the
relative to the element in one direction, so that
during an oscillation of the element in one direc 65 lever being pivoted to said element but beingre
strained from free angular movement relative
tion the lever ?rst moves therewith to cause its
thereto and a stop engageable by the lever to
tooth to mesh with said toothed member and then
moves angularly relatively thereto to a position
limit movement thereof away from the toothed
limited by said stop means to impart an advanc
member, so that during an oscillation of the ele
ing movement to said toothed member, and so 70 ment in one direction the lever ?rst moves there
that during an oscillation of the element in the
with to cause its tooth to mesh with said toothed
reverse direction the lever ?rst moves therewith
member and then moves angularly relatively
to disengage the tooth from the toothed member
thereto to impart an advancing movement to said
and then engages said stop to be retarded thereby
toothed member, and so that during an oscillation
to establish a de?nite angular relationship be 75 of the element in the reverse directionthe lever
2,411,195
10?
9 .,
?rst moves therewith to disengage the tooth from
the toothed member and then engages said stop
to be retarded thereby to establish a de?nite
angular relationship betweenthe lever and ,ele-. ?
ment at the end of. movement of the element. -
8. In a knitting machine, rotary means includ
ing a toothed member, an oscillatory element,
means for impartingbscillatory?motions to said
interrupting oscillatory motions of the ?rst men
tioned
element._ ?
-
11,. In a? knitting machine, rotary means in
cludinga toothed member, an oscillatory element,
means for imparting oscillatory motions to said
element, a lever having at least one tooth engage
able with teeth of the toothed. member, the lever '
being pivoted to said element but being restrained
element, a lever having at least one tooth engage,
.fromlfree angular movement relative thereto, a
able with teeth of the toothed member, the lever. 10f stop engageable by the lever to limit movement
being pivoted to said element but being restrained
thereof away from the toothed member, so that
during an oscillation of the element in one direc
from free angular movement relative thereto, a
tion the lever ?rst moves therewith to cause its
stop engageable by the lever to limit movement
tooth to mesh with said toothed member and
thereof away from the toothed member,? so that
during an oscillation of the element in one direc 15 then moves angularly relatively thereto to im
tion the lever ?rst moves therewith to cause its
' part an advancing movement to said toothed
tooth to mesh with said toothed member and then
moves angularly relatively thereto to impart an
advancing movement to said toothed member,
?member, and so that during an oscillation of the
element in the reverse direction the lever ?rst
and so that during an oscillation of the element
in the reverse direction the lever ?rst moves there
with to disengage the tooth from the toothed
toothed member and then engages said stop to be
retarded thereby to establish a de?nite angular
relationship between the lever and element at the
end of movement of the element, means for vary
ing the extent of oscillation of the element to
;? control the advance of the toothed member,
means rotating with the toothed member for
controlling the last named means, and means
for overruling the last mentioned controlling
action to effect uniform advancing movements
member and then engages said stop to be retarded
thereby to establish a de?nite angular relation
ship between the lever and element at the end of
movement of the element, and means for varying
the extent of oscillation ofrthe element to contro
the advance of the toothed member.
>
9. In a knitting machine, rotary means includ
ing a toothed member, an oscillatory element,
means for imparting oscillatory motions to said
moves therewith to disengage the tooth from the
of the toothed member.
? '
element, a lever having at least one tooth engage
12. In a knitting machine, rotary means in
cluding a toothed member, an oscillatory ele
able with teeth of the toothed member, the lever
being pivoted to said element but being restrained
ment, means for imparting oscillatory motions
to said element, a lever having at least. one tooth
from free angular movement relative thereto, a
engageable with teeth. of the toothed member,
the lever being pivoted to said element but being
stop engageable by the lever to limit movement
thereof away from the toothed member, so that
during an oscillation of the element in one direc
tion the lever ?rst moves therewith to cause. its
tooth to mesh with said toothed member and then
moves angularly relatively thereto to impart an
advancing movement to said toothed member, and
so that during an oscillation of the element in the
reverse direction the lever ?rst moves therewith
to disengagethe tooth from the toothed member
and then engages said stop to be retarded thereby
to establish a de?nite angular relationship be- I
tween the lever and element at the end of move
restrained from free angular movement rela
tive thereto, a stop engageable by the lever to
limit movement thereof away from the toothed
member, so thatduring an oscillation of the
element in one direction the lever ?rst moves
therewith to cause its tooth to mesh with said
toothed member and then moves angularly rela
tively thereto to impart an advancing movement
to said toothed member, and so that during an
oscillation of the element in the reverse? direc
tion the lever ?rst moves therewith to disengage
the tooth from the toothed member. and then
ment of the element, means for varying the ex
engages said stop to be retarded thereby to estab
tent of oscillation of the element to control the 50 lish a de?nite angular relationship between the
advance of the toothed member, and means
lever and element at the end of movement of the
rotating with the toothed member for controlling
element, means for varying the extent of oscil
the last named means.
lation of the element to effect single or double
10. In a knitting machine, rotary means in
advances of the toothed member upon each com
cluding a toothed member, an oscillatory element, ,
plete oscillation of the element, and means for
means for imparting oscillatory motions to said
overruling the last mentioned means to insure
element, a lever having at least one tooth engage
only single advances of the toothed member.
able with teeth of the toothed member, the lever
13. In a knitting machine, rotary means includ
being pivoted to said element but being restrained
ing a toothed member, an oscillatory element
from free angular movement relative thereto, a
having at least one tooth. engageable with said
stop engageable by the lever to limit movement
toothed member to impart step by step advanc
thereof away from the toothed member, so that
ing movements thereto and to prevent overrun
during an oscillation of the element in one direc
thereof, means for varying the extent of oscilla
tion the lever ?rst moves therewith to cause its
tion of the element to control the extent of ad
tooth to mesh with said toothed member and then 65 Vance of the toothed member, and means rotat
moves angularly relatively thereto to impart an
_ ing with the toothed member for controlling the
advancing movement to said toothed member, and
last named means.
l
so that during an oscillation of the element in the
14. In a knitting machine?, rotary means includ
reverse direction the lever ?rst moves therewith
ing a toothed member, an oscillatory element
to disengage the tooth from the toothed mem
having at least one tooth engageable with said
ber and then engages said stop to be retarded
toothed member to impart step by step advanc~
thereby to establish a de?nite angular relation
ing movements thereto, means for imparting
oscillatory movements to said element, and means
ship between the lever and elementat the end of
for interrupting such oscillatory movements, said
movement of the element, and means including
element, during periods of interruption of its
an element rotating with the toothed member for
2,411,795
11
12
movements, being located to lock said toothed
member against movement in both directions by
engagement of said tooth between teeth of said
relationship between the levers at the end of the
movement of the ?rst lever.
18. In'a knitting machinarotary means includ
toothed member.
15. In a knitting machine, rotary means includ
ing a toothed member, an oscillatory element
having at least one tooth engageable with said
ing a toothed member, an oscillatory element,
means for imparting oscillatory motions to said
toothed member to impart step by step advancing
element, a lever having at least one tooth engage
able with teeth of the toothed member, the lever
being pivoted to said element but being restrained
from free angular movement relative thereto, a
movements thereto, means for imparting oscil
latory movements to said element, means for 10 stop engageable by the lever to-limit movement
thereof away, from the toothed member, and
varying the extent of oscillation of the element
stop means for limiting angular movement of the
to control the advance of the toothed member,
lever relative to the element in one direction, so
and means for interrupting such oscillatory move
ments, said element, during periods of interrup
that during an oscillation of the element in one
tion of its movements, being located to lock said 15 direction the lever ?rst moves therewith to cause
its tooth to mesh with said toothed member and
toothed member against movement.
then moves angularly relatively thereto to a posi
16. In a knitting machine, rotary means includ
tion limited by said stop means to impart an
ing a toothed member, an oscillatory element
advancing movement to said toothed member,
having at least one tooth engageable with said
toothed member to impart step by step advanc 20 and so that during an oscillation of the element
in the reverse direction the lever ?rst moves there
ing movements thereto and to prevent overrun
with to disengage the tooth from the toothed
thereof, means for varying the extent of oscil
member without imparting a rotating force to
lation of the element to control the extent of
said toothed member and then engages said stop
advance of the toothed member, means rotating
with the toothed member for controlling the last 25 to be retarded thereby to establish a de?nite
angular relationship between the lever and ele
named means, and means for overruling the last
ment at the end of movement of the element.
mentioned controlling action to effect uniform
19. In a knitting machine'rotary means includ
advancing movements of the toothed member.
ing a toothed member, an oscillatory element,
17. In a knitting machine, rotary means in
means for imparting oscillatory motions to said
cluding a toothed member, a ?rst lever, means
element, a lever having at least one tooth en
for imparting oscillatory motions to said lever, a
gageable with teeth of the toothed member, the
second lever having at least one tooth engageable
lever being pivoted to said element but being
with teeth of the toothed member, the second
restrained fromv free angular movement rela?
lever being pivoted to the ?rst lever but being
restrained from free angular movement relative 35 tive thereto, and a stop engageable by the lever
thereto, a stop engageable by the second lever to
to limit movement thereof away from the toothed
limit movement thereof away from the toothed
member, so that during an oscillation of the ele
ment in one direction the lever ?rst moves there
with to cause its tooth to mesh With said toothed
member, and stop means for limiting angular
movement of the second lever relative to the ?rst
in one direction, so that during an oscillation of 40 member and then moves angularly relatively
thereto to impart an advancing movement to
the ?rst lever in one direction the second lever
said toothed member, and so that during an oscil
?rst moves therewith to cause its tooth to mesh
lation of the element in the reverse direction the
with said toothed member and then moves angu
larly relatively thereto to a position limited by
said stop means to impart an advancing movei
ment to said toothed member, and so that dur
ing an oscillation of the ?rst lever in the reverse
direction the second lever ?rst moves therewith
to disengage the tooth from the toothed mem
ber without imparting a rotating force to said 50
toothed member and then engages said stop to be
retarded thereby to establish a de?nite angular
lever ?rst moves therewith to disengage thetooth
from the toothed member without imparting a
rotating force to said toothed? member and then
engages said stop to be retarded thereby to estab
lish a de?nite angular relationship between the
lever and element at the end of movement of the
element.
ROBERT H. LAWSON.
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