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Патент USA US2412248

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Dec. 10, 1946.
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2,412,248
KNITTING METHOD AND vMACHINE
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Filed oct. 12, ’1941/
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Dec. 10, 1946.
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KNITTING METHOD AND MACHINE
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Dec. 10, 1946.
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KNITTIÑG METHOD AND MACHINE
Filed 001'.. l2, 1944
3 >SheetSV-Shee‘l; 3
w?
¿2,412,248
Patented Dec. 10, 1946
neural) stares PATENT oFFlcE
2,412,248
KNITTING METHOD
MACHINE
Paul W. Bristow, Laconia, N. H., assignor to Scott
& Williams, Incorporated, Laconia, N. H., a cor
poration of Massachusetts
Application October 12, 1944, Serial No. 558,337
19 Claims. (Cl. (i6-_14)
1
2
This invention relates to knitting machines of
the type having superposed needle cylinders as
shown, for example, in the patent to Bentley,
Figure 4 is a section taken on Athe plane indi
cated at 4-«4 in Figure 3; and
Figure 5 is a development, similar to Figure
1313336, dated May 2l, 1929.
1, but showing cams and associated parts par
ticularly involved in a hosiery machine.
In machines of this type, the needles are under
the control of sliders and are transferable to and
from each needle cylinder to permit the knitting
of a continuous fabric such as tubular fabric com~
prising courses some of the stitches of which are
The machine to which the present invention
is applied may have any number of feeds ranging
from a single feed in the simplest case, for eX
ample in a hosiery machine, through two feeds
knitted with needles operating in one cylinder 10 which also may constitute a hosiery machine, up
to a machine having quite a large number of
while other stitches are knitted by needles op
feeds of the so-called body-knitting type. In
erating in the other cylinder. By shifting the
the following description, reference will first -be
needles from one cylinder to the other reverse
made to a modification of the invention partic
concatenations of loops are effected to produce,
when the shifts are frequent and elaborate pat 15 ularly adapted to a body machine in which no
provision need »be made for reciprocatory knit
terns are produced, the fabrics which are com~
ting, narrowing, or widening. In such a body
monly referred to as links-and-links fabrics.
machine, it may be assumed that there is pres
Such fabrics may have quite elaborate designs,
such as diamonds or blocks, formed therein and
ent an even number of feeds grouped in pairs,
may range to simpler patterns involving fairly 20 a pair being herein described as involving a phase
of operation. However, an underwear machine
continuous ribs, various patterns being the re~
may have any desired number of feeds, from one
sult merely of suitable control of the needle trans-
upwards, between transfers. In this case two
fers.
are shown, by way of example only. If only two
The broad object of the present invention is _the
provision of a knitting machine in which elab 25 feeds are involved, the phase would extend
through 360 degrees and the end of a phase would
orate handling of the needles is made possible
then coincide with the beginning of the same
with particular insurance that no needle will
phase. In the case of two phases, each would
ever be free of control in both cylinders, i. e., will
comprise 180 degrees and they would be arranged
not be released by both the sliders which are
in succession so that the end vof one would coin
available for its control.
cide with the beginning of the other. Obviously,
A further object of the invention is the pro
such sequential arrangement can be carried on
vision of a machine of the type indicated in
to a quite large number of phases as would be
which tuck and ñoat stitches may be produced
present in a large body machine. It will be evi
in the links-and-links fabric.
dent that a description of one phase will suffice
Still another object of the invention is to pro
to cover any number of such duplicate phases.
vide a knitting machine of the type indicated in
Figure l shows in diagrammatic fashion the
which stockings may be produced, provision be
cams for control of the sliding elements, i. e., slid
ing made for reciprocatory knitting of heels and
ers, jacks and verges, for a single phase. Each
toes with the incidental narrowing and widening 40 phase comprises two feeds, the ñrst involving a
operations.
stitch cam 2 arranged to control needles to take
These and other objects of the invention, par
yarn from a feeding station indicated- at 4 at
ticularly relating to details of construction, will
which one or more yarn feeding fingers may be
become apparent from the following description
located, and the other involving a stitch cam 5
read in conjunction with the accompanying draw 4.5 arranged for the control of needles to take yarn
ings, in which:
at a second feeding station indicated at 8 and at
Figure l is a development of the cams for act
which similarly a number of yarn fingers may
ing upon sliders, jacks and verges, various asso
be provided.
The stitch cams 2 and 6 may be
axially adjustable for the control of length of
ciated parts also being illustrated, Figure 1 en
compassing these elements throughout one phase 50 stitches drawn thereat.
of the mechanism;
l
Figure 2 is a section taken on the plane the
trace of which is indicated at 2-2 in >Figure 1;
Figure 3 is a perspective View showing Vcertain
jack selecting elements;
Beyond the stitch cam 2 there is located a cam
lil serving to cause clearing of latches by loops
which are drawn under ,the action of the stitch
cam 2. This cam l0 is radially movable so that
55 when withdrawn needles may ride at a tuck level.
3
4
To provide clearing of latches at the second feed
there is provided a cam I2 which, alternatively
The lower and upper sliders which permanently
remain in their respective cylinders are indicated
diagrammatically at the right of Figure 1. The
lower sliders 66 are provided with butts 68 and
l0 which, together, by cooperation of the cams,
serve to control the movements of the lower slid
with a control hereafter described, will effect rise of
needles in the lower` cylinder to a latch clear
ing height. A cam I3 located immediately beyond
cam |2 cooperates with the alternative latch clear
ing means. Cam l2 is adapted to be radially
withdrawn vto permit needles to pass at a low
level.
ers. rI‘he lower sliders are provided with hooks
12 engageable in conventional fashion with the
lower hooks of the double hook needles 13 to serve
,
Cams I4 and l5, both of which are radially 10 to control their movements.
The upper sliders ‘i4 are similarly provided with
movable, are adapted to eifect, when in inner .
position, rise of needles for purposes hereinafter
described. A cam I8 is provided to effect trans'
fer of needles from the lower to theupper cyl-,
inder when the needles are partially raised by 15
selective control means.
A cam 20 serves to di
vide two raceways and serves to raise sliders in
the lower cylinder which do not carry needles. A
cam 24 serves to lower sliders to insure engage- `
pairs of butts 16 and 'I8 which, by cooperation
with the cams related to the upper cylinder, serve
for their control.
These upper sliders are pro
vided with hooks 80 engageable with the upper
hooks of the needles to actuate them when` 'the
lower hooks are operating to handle the yarn.
A cam 82 in the needle transfer region oper
ates in conventional fashion to tilt the sliders to
ment with stitch cam 6 even though, by virtue 20 disengage their hooks from the respective nee
dles, as indicated in Figure 2t The action is a
of adjustment, the stitch' cam occupies a position
conventional one such as described in Houseman K
lower than that shown.- A ,similar cam 22 eifects
Patent No. 2,252,769.
v
the same function in conjunction with the stitch
Below the lower sliders are located jacks H6
cam 2.
„
~
To guard against overrun of the lower sliders 25 which are acted upon by a series of controlling
cams which will now be described.
.
as they travel down the stitch cams 2 and 6,
These jacks ||6 are provided with upper butts
there are provided camsvZS and 28 which are
H8, saw-tooth butts H9, and lower butts |26
vertically adjustable, respectively, along with the
. which are provided with undercuts indicated at
stitch cams 2 and 6. These cams also have rises
as indicated to insure that the lower sliders prop 30 |22 adapted to be engaged by the sharpened
edges of suitable cams. Among the cams coop
erly engage the cams i4 Yand l2, respectively.
erating with these butts are 84, 86, and 88. In
Cams- 30 and 32 are guard cams which segre
advance of the cam 84 there are selectively in
gate sliders controlling needles ‘I3 through knit
wardly movable cams 90 adapted to be engaged
ting waves from sliders which do not carry nee
dles. Cams-34 and 36 serve to lower sliders in 35 by the saw-tooth butts ||9. A‘similar group of
cams 92 is located in advance of cam 86 while a
the _lower cylinder which do not carry needles to
further similar group of cams 94 is located in
avoid interference with the formation of stitches
advance of the cam 88. Adjacent the groups of
by needles in the upper cylinder which pass
through knitting waves adjacent the positions
of these cams.
The cams associated with the upper cylinder
include the stitch cams 38 and 40 associated, re
spectively, with the first and second feeding sta
tions. Cams 42 and 44 associated, respectively,
cams 90, 92, and S4 are cams 96, 98, and |00, re
40 spectively, arranged to engage the outer surfaces
of the butts |20 for the purpose of moving these
butts inwardly to cause them to avoid engage
ment with the cams 84, 86, and 88. Cams |02
and |04 are provided with sharpened edges and
serve to engage the undercuts |22 of lower slid
ers which have been pressed inwardly to elfect
outward movement of the lower ends of these4
jacks to present them for action of the next se
lective cams upon their saw-tooth butts, and also
with cams 46 and 48 serve to lower upper slid
ers to cause needles carried by them to clear their
loops. Cams 58 and 52 are arranged to raise up
pei` sliders to present them for proper engage
`ment by the stitch cams 38 and 46, these latter
being axially adjustable for the purpose of Con 50 to present their butts for possibleengagement by
the respective cams 98 and |00. Cams |06 and
trolling the lengths of loops knitted by needles
| 68 are provided for action upon the upper butts
in the upper cylinder. Cams 54 and 56 operate
||8 of jacks which are raisedby cams 84 and 86.
alternatively with the cams 42 and 44, cam 54
Cam H2 defines a raceway through which b-utts
being joined by a toggle connection with cam 42
and cam 56 being joined by a similar toggle con 55 H8 ride when jacks are raised by the cam 88.
The cam ||2 is provided with a portion l|4 de
nection with the cam 44. By this arrangement
only one of cams 42 and 54 is in operation at the
signed to engage butts || 8 Vand lower slightly
jacks which are not engaged by the cam 88. A
same time, while the same is true of the pair of
cams 44 and 56.
cam I|0 serves to lower jacks which were raised>
Guard cams 58 and 88 are connected to the 60 by cam 88. Cams |24 and |26 are guard cams
`same blocks as stitch cams 38 and 40 so as to be
which carry additional cams |28 -and |30 which
axially adjustable therewith. They prevent over
act upon the butts ||8 of jacks which have not
run of the needles when they are moved for stitch
been raised respectively by cams 84 and 86 to in
drawing and also serve by their rises to insure
sure that these jacks remain in the cylinder slots
proper engagement of the upper sliders with the 65 when the gaps in the vicinity of cams |06 and
cams 42 and 44 following a stitch drawing opera
|68 are reached. A cam |32 serves as aguard
tion despite extreme adjustment of cams 38 and
cam to define the extent to which butts `| I8 are
40 to draw extra long stitches.
lowered bythe action of cam l I4.
Y
A cam 62 serves to lower upper sliders to effect
Various other cams are provided, as indicated
transfer of needles from the upper cylinder to 70 in Figure 1, which need no special mention, being
the lower cylinder while cam 64 serves to re
provided either to prevent overrun of sliders in
store the upper sliders to a normal level after
the event their friction inthe cylinder slots is in
the transfer of needles therefrom, at which nor
suincient or to insure movementsv by acting upon
mal level they may again receive needles trans
the Second Suder butt in the event thefbutt which
ferred from the lower cylinder.
75 normally should deñne the slider movement
15
6
breaks. The functions of such auxiliary cams
will be evident from the drawings.
Additionally certain -carns perform the function
of holding the sliders and jacks in their slots and
prevent tilting when that is to be avoided.
Referring to Figure 2, the upper cylinder is in
dicated at 99 and the lower cylinder at IDI.
These cylinders are provided with the usual slots
for reception of the sliders, needles and jacks,
at 24, fullydepressed at the second feed by the
cam E to take yarn, and then raised, following a
slight rise at cam 2S, either by the cam I2 or by
its jack as hereafter described. In the paths F
and A, the latches are cleared.
If a ’tuck stitch is to be produced by failure
of a needle to clear -its latch before taking yarn
at the ñrst feed station 4, the slider may in a
previous'phase approach the cam 2 along either
the slots being defined by walls, preferably of 10 of the alternate paths A, C or B, D. After being
the inserted type. The lower portions of the
lowered by the stitch cam 2, it will `be raised by
walls in the upper cylinder are axially slidable to
the cam I4, and then further raised to the' path
provide verges Iût, the lower ends m5 of which
F either by the cam vIll or by action of its jack.
serve to hold the yarn between loops when stitch
rI‘his clears the stitch completed at the first feed.
es are being drawn by needles in the upper cylin 15 It will then be lowered by the cam 6, but under
der. 'I'hese verges are provided with butts 'I 01
this condition cam 'I2 is withdrawn so that it
adapted to be acted upon by cams as hereafter
leaves the phase along the path B. As will be
described. Conventional arcuate sinkers |09 are
evident from consideration of the phase, entry
provided, controlled in the usual fashion by cams,
into the next similar following phase along the
to cooperate with needles in the lower »cylinder 20 path B cannot lead to a rise to the latch-clearing
during stitch formation.
level at C but rather, the rise ‘will only occur
In Figure l, there are illustrated all of the pos~
under the action of the cam I5 to the path D
sible paths which may be taken by the butts of
in the approach to stitch cam 2. Consequently,
the upper and lower sliders for the production of
yarn is again taken at the ñrst feed of this fol~
the several results of which the machine is capa 25 lowing phase without .clearing of the loop which
ble. As will be evident from that figure, 'the mo
was taken at the second feed. Tucking will,
tions of the sliders are, in general, deñned in each
therefore, occur. As will be apparent hereafter,
passage through the illustrated cams by the ac
yarn in this following phase may be taken only
tions of the cams on both upper and lower butts;
at the second feed point, in which case the Acam
i. e., in a single passage, the motion of a slider
i5 will be withdrawn so that the path E will be
might be defined first by action upon a lower butt,
the continuation of the path B. Very compli
then by action upon an upper butt, followed by
cated tucking at successive feeds is possible, but
further action upon a lower butt, and so on. In
this need no-t be described in the present analysis.
the figure, the parallel paths of both the upper
Al third alternative involves production of a
and lower butts are illustrated, and the complete CII tuck stitch by failure of a needle to clear its latch
path Imay be ascertained by considering the suc-V
before taking yarn at the second feed point. In
cessive actions of the various cams on the butts.
this case, as before, entry into the phase may
The passage of sliders from the right-hand to the
occur either along the path A, C or the path B, D,
left-hand side of the figure will, for convenience,
followed by lowering of the sliders by the stitch
and as pointed out above, be referred'to as a
phase of operation.
As has been indicated, in a two-feed machine
this phase of operation may extend through 360
degrees, so that the sliders leaving the left-hand
cam 2 for the seizure of yarn at the first feed
point. The sliders are then raised by the cam
I4, but in this case, the cam Ill will be withdrawn
and the slider will not be raised by its jack, with
ie result that it 'will follow the path G which is
side of the figure may be considered as imme
insufficiently high to cause latch-clearing. The
loop of yarn from the i-lrst feed point is, there
the other hand, as is more usual in underwear
fore, carried in the hook along with the -yarn
machines, the complete circumference of the
seized at the second feed point by the action of
machine may involve a relatively large number of
the stitch cam 6 and is cleared by the subsequent
such phases in which the cams may be quite 60 rise of the slider over the cam l2, or by the action
different.
of its jack, to the path A.
In any event, the lower sliders may enter a
Multiple tuck stitches may be produced by entry
phase along two alternative paths, A and B.
of the slider along the path B, D, and depression
Similarly, the upper sliders may enter the phase
by the stitch cani 2 to take yarn at the first feedr
along two alternative paths, J and L. Beyond 55 point followed by path G resulting from with
this entrance, the paths may be variously split up
drawal of the cam I I! and absence of action by
in fashions which will be best understood by ref
the jack. Yarn is then taken at the Second feedv '
erence to particular events occurring in the
point under the’ action of the stitch cam E. The
diately reappearing at the right-hand side. On
phase.
slider may then rise up cam l2 if this cam is in
First, there may be considered the operations 60 active position or travel up, by action of its jack,
in the lower cylinder giving rise to normal stitch
to path A; or, on the other hand, it may remain
formation at both feeds. If a lower slider carry
in path B so that in the next phase, the stitch
ing a needle enters at A, or if, as will be pointed
may be cleared with rise of the needle to the
out, shortly after entry a needle is transferred
latch-clearing level either at the first or second
thereto from the upper cylinder, the slider in
feed, it being possible to take yarn again at the
knitting will follow the successive paths C, F and
first feed or to pass this feed without taking yarn
A, so as to enter the next phase (or re-enter the
under the float conditions hereafter described.
same phase in a two-feed machine) on the path
To produce a draw stitch at the first feed, the
A. In this case, the slider is first slightly de
slider must enter on the path B and then follow
pressed at 22, depressed fully, so that its needle 70 the path E, resulting from the withdrawal of thewill seize yarn, by the cam 2, raised slightly by
cam I B. If yarn is to be taken at the second feed
cam 25 and then by the cam I4, if cam It is in
either for forming a tuck or a normal stitch, the
active position, then further raised either by its
slider then rises over cam It to follow the path
jack, as hereafter described, or by the cam Il] if
G or over both vcam M and then, by the .action
that >.cam is in active position, depressed slightly 75 of cam I0 or by jack action, to the path F.
2,412,248
7
phase, by >withdrawal of the cam 44 in which case
' To produce azdraw stitch at the' second feed,
cam I4 isA withdrawn so that after’passing'the
position of the stitch cam 2 the slider will follow
the path H. If. a stitch in the phase is to be made
with the yarn at the first feed, clearing of the
the path J will be followed.
--
'
' ;
If a draw stitch isto-be produced at the ñrst
feed and knitting is to occur et the secondfeed,
the slider must enter the Vphase along: the path
J, when transfer ofi-its needle to the lower cylin
latch by the loop of this yarn is then effected by ‘
der will not occur and under which condition >it'v
will not cause seizure of the yarn at the ñrst
rise of the slider to the path A either by the action
of the cam I2 or rise of the jacks.
The above describes in a general way> the pos
feed,‘being only slightly raised by the stitch cam
and then slightlyre-advanced by the cam 58 to
sible alternative actions of needles controlled by
sliders in the lower cylinder in a single phase.
It will be evident, however, that the ultimate
stitch formation in the fabric may depend, in cer~
engage the camV d2 now in action which, together
with carnllß, will cause it -to follow the path M.
It irs-then raised by camsEZ` and 40 to take yarn`
at-the second feed followingl which it will take I
the path N, if cam 44 is active, in order to clear
the latch or, alternatively, the path J if the
cam 44 is withdrawn,’withideferring of latch
tain instances, on what has occurred in the pre
ceding and succeeding phases, and, in fact, sev
eral instances of that have been heretofore indi
cated. It is possible, therefore, that quite com
plicated stitch arrangements may be produced.
clearing until the next phase.
- „
Draw stitches will be produced at both feeds
One further action of the slider in a phase may
if cams 42 and 44 are both withdrawn, in which
20
take place attending transfer of a needle from
case the path will be J, K, J.
Y '
a lower slider to the corresponding upper slider.
It may be noted that all of the various paths
This will be more fully described hereafter, .but
just described may-be followed not only by slid
it will suffice to point out at the Present time that
ers rwhich carry needlesybut by empty sliders to
in this case the lower slider enters at A eithei`
which needles are not transferred at the position
carrying the needle to be transferred or empty,
of cam~ ES. Such empty sliders may thus go
the latter along the shaded portion of the path
along with sliders carrying needles in the upper
A. When the unshaded portion of the path is
cylinder without having any effect.
reached, the needle is transferred from the upper
The transfer of all needles entering along path
cylinder to the slider, but in then following the
L from the upper cylinder to the lower cylinder
-30
path O the needle is transferred or retransferred
by cam 62- is a necessary event if patterns of
to the upper cylinder, the rise being effected by
links-and-links type are to be produced, or if
jack action and the cam lâ. Beyond the cam I8
changes from one type of rib structure to an
the path O is followed by the empty slider with
other are to be made. However, where a con
depressions at 3d and 36 for the purpose of get
35 siderable length of fabric is to be produced with
ting the slider out of position to interfere with the
out a change in the rib arrangement, as, forex
needle latch when the needle is raised in the
ample, a 1X1 rib top or a broad rib leg, it is not
upper cylinder by cams S8 and dll and the latch is
necessary to produce transfers of needles in each
closing upon the seized yarn. If the empty lower
course. In such case, once -the desired needle
slider continued to follow a path at a higher level
arrangement _is secured, cam 62 may be with
it would be in the path of swing of the latch and
drawn so that the sliders pass it atthel level of
would interfere with yarn seizure.
path L, thereafter going through any of the
The upper sliders also have alternative paths
various waves described above. At the same,
for the production of different stitches and for
time, of course, jack selection of the lower sliders
effecting transfer. If knitting at both feeds is 45 for transfer is interrupted, or cam I8 may be
to occur, the upper slider, which may or may not
'
withdrawn.
carry a needle, will enter along the path L and
The action of jacks has been so far merely in
will be depressed by the cam G2. If, at this time,
dicated. The jacks perform three different
it carries a needle, the needle will be transferred
functions: namely, that of effecting selective
to the lower slider so that through the shaded 50 transfer> of needles from lower to'upper sliders,
portion of the path„the upper slider> will not
that of providing selection as an alternative to
carry a needle. When the position in line with
the action of cam I0, and that of providing se
the cam I8 is reached, however, and if the cor
lection as an alternative to the action of the cam
responding lower slider is raised over cam i8, the
I2. The various possible paths of the jacks will
upper slider will thereafter carry a needle and 55 now be described.
\
will be raised successively by the cam 50 and the
As in the case of the sliders, the paths taken
stitch cam 33 at the first feed to take yarn there
by the jacks are Vdetermined by the actions of
at. It will then be advanced by the cams 42 and
cams upon both upper butts H8 and the lower
46 along the path M to a level serving to clear
undercut butts |20. The parallel paths of these
the latch. Following this, it is again raised by 60 butts are indicated in Figure 1, the path of the
the cams 52 and d0 to take yarn at the second
lower butt having its lower edge shown as cor
feed and is advanced by the cams d4 and 48 to
responding to the throat of the undercut at I22. ,
follow the path N to effect clearing of the latch.
The jacks enter the phase of operation described
Thus stitches are completed at both the feeds
along either of the alternative paths P and Q.
and entry into the next phase takes place along 65 The former results from the depression of ajack
` `
l
under the action of cam IIB. The _latter results
if knitting is to occur at the first feed `and a
from the depression of a jack by the action of
the face II4 of the cam II2. As will be evident
draw stitch is to be produced at the second, the
path is as just described past the stitch cam 3%.
from the drawings, the two paths differ only in
In this case, however, the cam 42‘ is Withdrawn 70 that the path Q is slightly lower than the path P.
so that the path K is followed. The cam 4d,
If, following the path P, one of the cams 9U
however, remains in action So that the slider is
engages a saw-tooth butt II9 of a jack, the butt
advanced by the cams 4d and 48 along the path
I¿IlV thereof will be raised sufñciently to clear
N to effectv clearing of the stitch. This clear
the cam 98 _so that the lower end of the .jack will
ing may, however, be delayed until a subsequent 75 not be .rocked inwardly thereby and will conse
the path L.
2,412,248
quently be in such position that its undercut |22'
will engage the edge of the cam 84 so that it,
will be raised along'fthe path R, being subse»
quently depressed by the action of cam Hlßon its
butt H8. At the top of the rise along the path
IZB will clear the cam Ißil andV consequently itv
will followr the path V over the cam 38„ after
which it will be depressed by the cam llß to
the path` P.. In the rise over the cam 88, its
corresponding needle will be raised so that even
R, it will serve to elevate a needle from the path
A through the initial part of the path O so that
the needle will be thereafter raised by the cam
if the cam I2 is withdrawn, it will, by engage
ment with` the cam i3, be brought to the path A.
I3 to transfer position.
jack will. be rocked inwardly by the action of
ì
If no cam dll engages a butt of a jack, the
path P is not raised by the action of a cam 9i)
on one of its saw-tooth butts, its butt |29 will not
cam |00 on >its butt |20 with the result that it will
miss the cam 88 and will follow the path W.
Upon reaching the face H4 of the cam H2, the
be raised sufficiently to clear the cam 9€» with the
result that the jack will be rocked inwardly and
will, therefore, fail to engage the cam 84, thus-
low the path Q previously described.
, The butts IUT of the verges Ill3A follow the path
If, on the other hand, a jack following the
jack will bel slightly lowered and thereafter fol
X which involves depressions by cams 3S) and
el respectively followed by rises over cams 43
ing the cam H32, the undercut l22 of its butt l2@
and 45. The wavesV thus given to the verges cor
which will be in a radially inner position will beV
respond to the positions at which stitches are
engaged by the cam H32 so that the lower end
of the jack will be rocked outwardly for a` sub- 20 drawn by needles in the upper cylinder, The
verges serve to measure the stitches by engage
sequent action hereafter described (see the first
ment of yarn between adjacent needles in the
jack from the left in Fig. 3).
upper cylinder, their use being specially pro
If the jack enters the phase along the path Q,
nounced when a series of successive needles are
there are two possible operations which may oc
following the path indicated at S. Upon reach
cur. First is the normal intended one in which
none ofthe cams B9 will engage any saw-tooth
, knitting in the upper cylinder and so have in
terposed no needles in the lower cylinder to hold
butt. Under such circumstances, the jack will
not be raised from the path Q and will follow one
the yarn downwardly.
,
later picked up bythe cam m2 which will slightly
I8, 22, 2, 3G, 29, 6, 32 and i3, so as to enter the
phase at A and cannot possibly getinto the path
B. As a result, it must be in position to receive
It will be evident that a lower slider which has
transferred its needle to an upper slider in ris
butt position below the path` S, having its lower
end rocked inwardly by the cam 9S and being 30 ing over` cam I3 must follow the path above cams
raise it to the indicated path S and also move
outwardly its lower end. If, however, in enter
a needle transferred from the upper cylinder at
ing along the path Q one of the saw-tooth butts
cam 552.> This is of major` importance since, if
is engaged by a cam 90, the jack will be raised
an empty lower slider were in path B when pass
by the cam. The rise imparted by the cam 9E)
is only the same as the lowering action elïected . ing the transfer position, the corresponding up
per slider would release the needle without its
by the surface lill of the cam H2, and inas
being received by the lower slider. Once so re
much as the path Q is already below the path P
by the amount of this rise, the rise so resulting 40 leased, itis unlikely that the needle will be re
engaged by either slider, resulting in a load»
will not effect the missingv of the cam 96 by the
up that will cause the needle or slider to break,
butt íZû, in fact, leaving the jack in the same
or if the needle hook is contacted by a slider, the
position as would occur if it entered along the
path P and was not raised by a cam 52%.
Con
sequently, it will follow the path S as previously
described,
if it entered along path P but >was
notJ raised by a cam Sil.
,
The action of the cams lllß and |82 result in
slider cannot move outwardly and breakage of
l either the. needle hooi; or the'slider hook will -
occur. The invention deñnitely insures that no
needle can ever become out of control by both
sliders.` If, due to some miscalculation of the
pattern set-up, `a lower slider fails to. transfer
reach a position for action by the cams 92. All 50 its needle to an upper slider when it should do
so, noy damage, eXcept to produce an undesired
of the jacks are in position for engagement by
pattern, will- result, since the needlewill remain
the cams 92, their lower ends being positioned
under control of the slider though it follows an
outwardly by reason of the action of cam H32.
incorrect cycle.
,
By the selective action of cams 92, therefore, cer
tain of the jacks may be slightly raised to miss 55 The fact that the described path above the
cams is necessarily followed by any lower slider
the cam Q8 and accordingly follow the path T'
which carries no needle means that so far as se
over the cam 85, being subsequently depressed
lection is concerned, it is possible to disregard
by the cam lila. As a result of this rise, the nee
any past performance of a slider and take into
dles are positioned as if raised by the cam lli,
regardless of whether that cam is in or out, to the 60 account only whatis Ato be accomplished there- v
after. Otherwise, if an empty lower slider could
path F previously described. If a jack is not
follow oneof the knitting paths, it would be nec
raised by one of the cams 92, its butt E25' will
essary to insure its selection by one of the cams
be rocked inwardly by the action of cam 98 (see
94 to be sure (when cam l2 is withdrawn) that
the third jack in Figure 3) and, consequently,
it will follow the path U, being engaged by the 65 it could not enter the phase at B.
_The foregoing is obviously of advantage to the
cam §94 having an action similar to that of cam
the paths R and S being merged vbefore the jacks
m2, namely, positioning the lower'end of the jack
outwardly for another selecting action. As will
be evident'from Figure l. the paths 'I'.andU
ñxer in that the pattern >may be laid out in a’di
rect fashion without, keeping in mindvthe pat
terning in a preceding course. Thel safety race
merge at the position of the cam lila. AAccord- 70 wayis necessary if there is any mixup of selec
tion at the lap in the .back of a stocking caused
ingly, all of the jacks are presented under-the'
when the selecting cams change.
same conditionsv to the next selecting action by
cams 94.
»
In the modification of Figurey 5, which repre
sents the application of the invention to a hosiery
If a saw-tooth Vbutt of .lack is engaged by a
cam 94, the jack will. be raised so that its'butt 75 machine capable of knitting heels and toes,> the
2,412,248
12
tive position except when widening takes place,
ñrst feed is represented at |38 and may com
prise a conventional series of yarn feeding fingers.
whereupon it is lowered into active position, the
Associated with this isa latch guard plate |39,
inactive position being illustrated in Figure 5.
In addition to the cams described, there are»
the purpose of which is hereafter described.
others not requiring specific mention but which
At the lmain feed there are two stitch cams
act as safety cams to avoid damage in case of
|60 and |42 similar in construction butA adapted
for alternative functioning, the upper acting>
butt breakage, to prevent overrun of sliders, or
to maintain sliders in the cylinder slots.
The sliders in the case of this modification
upon the upper butts of the sliders in the lower
cylinder during the major round-and-round knit
ting operations, while the lower acts upon the
lower butts of such sliders during the forward
reciprocations in the formation of heels and toes.Í
A` center cam |44, acting on upper butts, funci
tions in conjunction with the cams |40 and |42
and additionally in conjunction with the reverse 15
stitch cam |46.
Guard cams |43 and |41 are
provided to limit the downward movements of
sliders as they are lowered by the stitch cams.
Cam |88 is provided to act upon lower butts of
are similar to those of Figure 1, but in this case
the lower sliders are differentiated into two
groups by having long and short butts, respec
tively. Y The sliders controlling instep needles are
provided with short lower butts and long upper
butts, while those controlling sole needles are
provided with long lower butts and short upper
butts'so that diiferentiation of the two groups
may be effected by partial lwithdrawal of cams
as described below. The sliders are associated
sliders for a purpose hereafter described. Cams 20 with jacks as in the mod_iñcation of Figure 1.
|50, |542, and |54 are provided to cooperate with
each other in raising sliders lowered by the for
ward stitch cams to provide alternative clearing
Knitting'a-t both feeds during rotary knitting
bring the needles down to draw stitches. A' guard
taking yarn at the feed station |39. Thereupon>
cam |68 prevents overrun of sliders in the case
it will ride over cams |50, |52, and |54 to the
latchclearing level G' passing then beneath cam
|60 and stitch cam |62 to J', taking yarn at the
may be accomplished in both the lower and up
per cylinders. In such case, a lower slider may
of loops when in active position or the production . enter along any of the three paths A', B', or O’.
of tuck or draw stitches Vby jacks when the cams 25 In case of entry along paths O' or B', the slider
will ride over cams |66 and |08 to follow the.
are inactive. A cam |56 serves to lower sliders
path D’. In the case of entry at A', it will also
as hereafter described.
follow D', which is in the direct line of A'. After
The second feed point is indicated at |58 and
_ depression by center cam |44, it will then be de
may comprise a series of yarn feeding fingers as
sociated with cams |60 and |62 which serve to 30 pressed by stitch cam |410 along the path F'
of stitch formation at the second feed. VCam
|63 brings selected sliders to a position to present
second feed station |58. Following this, it may.
their needles for wrapping, this cam following a
slider selecting means of the type indicated in
continue on the path B’ or, alternatively, be
raised at K' by the action of suitable wrap selec
tion mechanism on its corresponding jack in the
Figure 1, which, however, is not indicated inA this
ligure except by the indication of the vpath taken
by the sliders when selection occurs. `Cams |96y
event that the needle'is to be wrapped. After
being raised by cam |63 to the level at which
and |68 serve to raise sliders for purposes here
after described.
l
.
wrapping> will take place, it will re-enter the
phase of knitting at O'. kLatch clearing by theY
.
Cam |10 serves for the raising of lower sliders
stitches Vdrawn at the second feed is occasioned
to a transfer position following selection as in
by the cam |68, wrapping taking place at tuck
the modification of Figure 1 by selecting means
not shown in the present modification. Cam
|12 following cam |10 serves to re~lower the raised
sliders which have delivered their needles to
sliders in the upper cylinder. An auxiliary safety
cam |`|| is provided to effect the same action as
cam |12 if a lower butt is broken. Cam `|16
serves to raise lower sliders to a tuck level prior
to the first feed point. Cam |18 serves to raise
sliders as hereafter described during reverse
reciprocation.
Cams |86 and |82, operating upon upper sliders,
level.
l
In the case of sliders in the upper cylinder,
they enter the phase at P', pass beneath thecam
_|80 to transfer their needles to the cylinder
50
sliders, then rise over cam |62 beyond which
needles are transferred to upper sliderswhich
are to control the taking of yarn. The sliders
then pass over cam | 86 by which they are brought
to a level such that their needle latches are po
. sitioned to be held open by the latch guard plate
|39. They then rise over the stitch cam |90,
effect the transfer of needles from the upper cyl
taking yarn at the ñrst feed. Depression of the
inder to the lower cylinder and the return of the
upper sliders then occurs under the action of
sliders. Cam |86 acts upon sliders during the
cams |92 and |93, the` needles being lowered by
transfer operation to free their hooks from the
the latter to a latch clearing position. They then
needle hooks. Cams |86 and |88 serve top-Dre 60 rise over cam |94, pass above cam |96, and then
sent the needles carried by the upper cylinder
rise over lstitch cam |98 taking yarn at thesec
to the first feed stitch cam |90, with which coop
ond feed. They are then lowered by cams 200
erates a guard cam |9| to avoid overrun of the
upper sliders. Cams |92 and |93 serve to lower
the upper sliders to effect latch clearing. Cams
and 202, the latter effecting clearing of the
latches and bringing them back to -the path P’.
Tucking may be effected at the iirst feed by
|95, |96, and |91 present the upper sliders to the
needles controlled in the lower cylinder if cam
stitch cam |98 at the second feed with which
|66 is withdrawn, with the result that the slidersthere is associated a guard cam |99 to prevent
follow the path B', L' rather than path B', D’
moving at the tucking level as contrasted with
overrun of the sliders. Cams 200 `and 202 fol
lowing the second feed, lower the upper sliders 70 D' whichis at the latch clearing level. AThe
and effect clearing of latches of the needles in
remaining path will be the- same as that involved
the upper cylinder.
in knitting at the second feed, clearance of both
The usual raising pickers 204 and 206 blank
stitches occurringl as passage over the cam' |54
the cams of the main feed as indicated. A lower
ing picker 208 normally occupies an upper inac 75
takes place.
Y
.
If tucking at the second feed is to occur,`the
2,412,248
13r
conditions are again similar to that involved in
knitting at both feeds with the exception that
cam |54 is now withdrawn and rise of the lower
sliders first occurs, after the yarn is taken, by
passing over cam |50 along the path H’ where.u
by the needles are raised to a tuck level.
Pro
vision is not made in the set-up illustrated fo-r
tucking in the upper cylinder.
_
.
Draw stitches may be produced at thenrst
feed in the lower and upper cylinders; If this
is to occury at the ñrst feed in the lower cylinder,
cams |56 Vand |16 are both withdrawn so that
the lower sliders follow the Successive paths B’
and M’ passing below the stitch cam Mil at the
ñrst feed. Thereafter by the action of cams |50,
|52, and |54, they are raised to the latch clear
ing level at G’and are ready to pass through
the stitch drawing wave at the second feed.
of the path N’
sliders will ride
and |56 in both
the subsequent
14
at which level the picked up
past the withdrawn cams |14
directions of reciprocation. Inl
widening operation, this same
picking occurs with the additional picking vdown
of two needles upon each reciprocation inthe
usual fashion by the lowering picker 20B which
will effect lowering of the sliders to the active
levels.
With respect to avoidance of possible loss of
control of a needle by both of its sliders, the action
of the arrangement of Fig. 5 is similar to that
of Fig. l. A lower slider, which transfers a needle
to the upper cylinder by jack selection power to
cam ile followed by a transferring rise over that
cam is constrained to follow a path below cams
|l| and |72 (and above the guard cam lf3) , above
cam |44, under VM, over |43, above guard cam
|49, and under iet, leaving the phase along the
In case draw stitches are to be pro-duced in
the upper cylinder at the ñrst feed cam 200 is 20 path A’ which insures its location in position to
receive any needle transferred from the upper
withdrawn, in which case, after leaving the stitch
cylinder. It cannot possibly get into the path B’
cam |98 at the second feed, the upper sliders
which is followed by sliders controlling needles forwill follow the path Q', thereby passing above
various operations as described above. Even with
the stitch cam |91).
an error in the set-up of the patterning controls,
If selective formation of draw stitches is to
therefore, it is impossible for an empty lower slider
occur at the second feed in the case of lower
to get out of needle receiving position at the
cylinder needles, cam |50 is withdrawn so that
transfer point.
the lower sliders, after leaving the stitch cam
What I claim and desire to protect by Letters
|40, will follow the path I', J', if not raised by
jacks, below the stitch cam |52 thereafter fol 30 Patent is:
1. A knitting machine comprising superposed
lowing either the path K', O' or the path B’
needle carriers, sliders provided with butts and
previously described, the former being followed
needles controlled by the sliders movable in said
if wrapping is to occur.
carriers, means for transferring all needles located
If non~selective draw stitch production is to
occur in the upper cylinder at the second feed, 35 in one carrier to the other carrier, means for
thereafter transferring selected needles from the
cam |92 is withdrawn so that the upper sliders,
second carrier to the first carrier, rneansfor con
after passing the stitch cam |90, will follow the
trolling sliders in the second carrier to cause
path R' above the stitch cam |98, missing the
needles therein to form selectively stitches of
yarn at the second feed. Thereafter these; sliders
are again engaged by cams 2d@ and 262 to follow 40 varying types, and means for preventing sliders
which have transferred needles to the rlrst carrier
the path P’.
from-being controlled by said means for causing
As has been previously indicated, the sliders
the formation of stitches.
which carry instep needles are provided with
2. A. knitting machine comprising superposed
short lower butts. If the cam llt is Withdrawn
to miss all butts and cams ISG and |78 are par~ 45 needle carriers, sliders provided with butts and
needles controlled by the sliders movable in said
tially withdrawn so as to engage long' butts but
miss short butts, thev short butt instep sliders will
carriers, means for transferring all needles located
reciprocate in the path made up of M', I', J ’ and
in one carrier to the other carrier, means'for
B’. The needles carried by these sliders accord
thereafter transferring selected needles from the
ingly fail to engage any yarn at either feed, 50 second carrier to the first carrier, means for con
trolling sliders in the second carrier to cause
holding lops during the formation of the heel
needles therein to form selectively stitches of
and toe for resumption of the knitting of the
varying types, and means for preventing sliders
instep or the loopers rounds. The long lower
which have transferred needles to the first carrier
butt sliders, on the other hand, will, in a for
ward reciprocation, follow substantially the nor 55 from being controlled by said means forcausing
the formation of stitches, thus positioning said
mal knitting path involved in- knitting yarn at
last named-sliders to receive needles from the
the first feed. However, in this case, the stitch
other carrier in a subsequent phase of knitting.
cam |40 is raised so that the alternative stitch
3. A knitting machine comprising superposed
cam |42 acting on lower butts cornes into action.
and controls the wave involved inthe seizure of 60 needle carriers', sliders provided with butts and
yarn. The path in a forward reciprocation is
needles _controlled by the sliders movable in said
carriers, means for transferring all needles lo
then A', D', F', G', cams i5!! and |54 raising the
cated in one carrier to the other carrier, means
sliders, after knitting, to latch` clearing level.
for thereafter transferring selected needles from
In a reverse reciprocation, the long butt sliders
will enter the phase from the left at the level 65 the second carrier to the first carrier, means for
controlling sliders in the second carrier to cause
of path A', will pass withdrawn cam |50, 'will
needles therein to form selectively stitches of
ride over stitch cam |42, will be lowered by cen
varying types, and means for preventing sliders
ter cam |44 to ride down the stitch cam lli@
which have transferred needles to the first carrier
taking yarn at the ñrst feed, and will then ride
over the. cam |18 to a latch clearing level.
70 from being controlled by said means for causing
the formation of stitches until they have again
This action occurs for ally except the picked
become associated with needles.
sliders which, on each reciprocation during'a nar~
fl. A knitting machine comprising superposed
rowing operation, will be those which precede
the group of long lower butt sliders. The action
needle carriers, sliders provided with butts. and
of the pickers is'to. raise the-slidersto they level 75 needles controlled by the sliders. movable» in said
2,412,248.
15
v1.6
carriers', means for transferring all needles located
the means for controlling kthe formation of
stitches for preventing sliders which have trans
in one carrier to the other carrier, means for
thereafter transferring selected needles from the
second carrier to the ñrst carrier, means for con
troliing sliders in the second carrier to cause
needles therein to form selectively stitches of vary
ing types, and means appurtenant to each of two
feeding stations for preventing sliders which have
transferred needles to the first carrier from being
controlled by said means for causing the forma
tion of stitches.
î
5. A knitting machine comprising superposed
needle carriers, sliders provided with butts and
needles controlled by the sliders movable in said
carriers, means for transferring all needles lo
cated in one. carrier to the other carrier, means
for thereafter transferring selected needles from
the second carrier to the first carrier, means for
controlling sliders in the second carrier to cause
needles therein to form stitches, and means for
presenting sliders which have transferred needles
to the first carrier from being controlled by said
means for causing the formation of stitches.
ferred needles to the first carrier from being con
trolled by said means for causing the formation
of stitches-
~
I
' 10. A knitting machine comprising superposed
needle carriers, double-ended needles mounted
in said carriers, sliders in both carriers arranged
to control movements of said needles, means "for
transferring needles from sliders in one carrier
to sliders in the other, means for retransferring
needles from sliders in the second mentioned
carrier to sliders in the first, means controlling
sliders in the second carrier subsequent to the
region of retransfer to cause needles controlled
by them to form stitches, means controlling slid
ers in Vthe first carrier subsequent to the region
of retransfer to cause needles controlled by them
to form stitches, said means for controlling slid
ers in the second carrier selectively causing them
to follow alternative paths to effect the forma-'
tion of different types of stitches, and means
for controlling those sliders in the second car
6. A knitting machine comprising superposed
rier which have retransferred their needles so as
needle carriers, sliders provided with butts and 25 to avoid action thereupon by the means for con
needles controlled by the sliders movable in said
trolling sliders in the second carrier to form carriers, means for transferring all needles lo
stitches.
cated in one carrier to the other carrier, means
11. A knitting machine comprising superposed y
for thereafter transferring selected needles from
needle carriers, double-ended needles mounted in
the second carrier to the first carrier, means for 30 said carriers, slidersin'both carriers arranged to
controlling sliders in the second carrier to cav-.se
control movements of said needles, means for
needles therein to form stitches, and means for
transferring needles from sliders in one carrier
preventing sliders which have transferred needles
_ to sliders in the other, means for retransferring
needles from sliders in the second mentioned
means
to the first
for causing
carrier the
from
formation
being controlled
of stitches,
by thus
carrier to sliders in the first, means controlling
positioning said last named sliders to receive
sliders in the second carrier subsequent to the
needles from'the other carrier in a subsequent
region of retransfer to cause needles controlled
phase of knitting.
by them to form stitches, means controlling slid
7. A knitting machine comprising superposed
ers in the first carrier subsequent to the region
needle carriers, sliders provided with butts and 40 of retransfer to cause needles controlled by them
needles controlled by the sliders movable in said
to form stitches, said means for controlling slid
carriers, means for transferring all needles lo
ers in the second carrier selectively causing
cated in one carrier to the other carrier, means
them to follow alternative paths to effect the
for thereafter transferring selected needles from
formation of different types of stitches and leav
the second carrier to the first carrier, means for 45 ing them in alternative positions in` at least
controlling sliders in the second carrier to cause
one of which they would be incapable of receiv
needles therein to form stitches, and means for
ing needles in a transfer operation'and, means
preventing sliders which have transferred needles
for controlling those sliders in the second car-A
to the first carrier from beingV controlled by said
rier which have retransferred their needles so>
means for causing the formation of stitches until 50 as to avoid action thereupon by the means for
they have again become associated with needles.
controlling sliders in the second’carrier to form
8. A knitting machine comprising superposed
stitches.
needle carriers, sliders provided With butts and
12.. A knitting machine comprising superposed
needles controlled by the sliders movable in said
needle carriers, double-ended needles mounted
carriers, means for transferring all needles lo 55 in said carriers, sliders in both carriers .arranged
cated in one carrier to the other carrier, means
to control movements of said needles, means for
for thereafter transferring selected needles from
transferring needles from sliders in one carrier to
the second carrier to the first carrier, means for
sliders in the other,v means for retransfe'rring
controlling sliders in the second carrier to cause
needles from sliders in- the second mentioned
needles therein to form stitches, and means ap 60 carrier to sliders in the first, means controlling
purtenant to each of two feeding stations for
sliders in the second carrier subsequent to the
preventing sliders which have transferred nee
region of retransfer to cause needles controlled
dles to the first carrier from being controlled by
by them to form stitches, said means for con
said means for causing the formation of stitches.
trolling sliders in the second carrier selectively
9. A knitting machine comprising superposed
causing them to follow alternative paths to ef
needle carriers, sliders provided With butts and
fect the formation of different types of stitches,
needles controlled by the sliders movable ‘in said
and means-for controlling those sliders in the
carriers, means for transferringV all needles lc
second carrier which have retransferred their
cated inone carrier to the other carrier, means
needles so as to avoid actionthereupon by the
for thereafter transferring selected needles from 70 means for controlling sliders in the second car
the second carrier to the first carrier, means for
rier to form stitches.
K
controlling sliders in the second carrier to cause
13. A knitting machine comprising superposed
needles therein to form selectively stitches of
needle carriers, double-ended needles mounted in
varying types, and means including at least one
said carriers, sliders in both carriers arranged to
cam between the point of Yselective vtransfer and " control movements of said needles, means for'
2,412,248
17
transferring needles from sliders in one car
rier to sliders in the other, means for retrans
ferring needles from sliders in the second men
tioned carrier to sliders in the iirst, means con.
trolling sliders in the second carrier subsequent
to the region of retransfer to cause needles con
trolled by them to form stitches, said means for
controlling sliders in the second carrier selec
tively causing them to follow alternative paths
to effect the formation of different types of
stitches and leaving them in alternative posi
tions in at least one of which they would be in
capable of receiving needles in a, transfer opera
tion, and means for controlling those sliders in
the second carrier whiclrhave retransferred their
needles so as to avoid action thereupon by the
means for controlling sliders in the second car
rier to form stitches.
14. A knitting machine comprising superposed
needle carriers, double-ended needles mounted in
said carriers, sliders in both carriers arranged to
control movements of said needles, means for
transferring needles from sliders in one carrier
to sliders in the other, means for retransferring
needles from sliders in the second mentioned car
rier to sliders in the ñrst, means controlling slid
ers in the second carrier subsequent to the re
gion of retransfer to cause needles controlled by
them to form stitches, said means for controlling
sliders in the second carrier leaving them in a
position in which they Would be incapable of re
ceiving needles in a transfer operation, and
means for controlling those sliders in the second
carrier which have retransferred their needles
so as to avoid action thereupon by the means for
controlling sliders in the second carrier to form
stitches.
18
needle carriers, double-ended needles mounted in
said carriers, sliders in both carriers arranged to
control movements of said needles, and a plural
ity of successive control phases, each of said
phases including means for transferring needles
from sliders in one carrier to sliders in the other,
means for retransferring needles from sliders in
the second mentioned carrier to sliders in the
first, means controlling sliders in the second car
rier subsequent to the region of retransfer to
cause needles controlled by them to form stitches,
said means for controlling sliders in the second
carrier selectively causing them to follow alter
native paths to effect the formation of different
types of stitches and leaving them in alternative
positions in at least one of which they would be
incapable of receiving needles in a subsequent ,
transfer operation, and vmeans for controlling
Athose sliders in the second carrier which have
retransferred their needles so as to avoid action
thereupon by the means for controlling sliders
in the second carrier to form stitches.
17. A knitting machine comprising superposed
needle carriers, double-ended needles mounted
in said carriers, sliders in both carriers arranged
to control movements of said needles, means for
effecting transfer of needles from sliders in one
carrier to companion sliders in the other, the
sliders in one carrier, when their companion nee
dles are associated with sliders in the other car
rier, not being retracted by a knitting cam, and
supplemental means for reti-acting such sliders
at the knitting point so that they Will not inter
fer@ with the knitting of stitches by their com
panion needles operating in the other carrier.
18. The method of controlling sliders in a knit
ting machine comprising superposed needle car
15. A knitting machine comprising superposed
riers, double-ended needles mounted therein, slid
ers in both carriers for controlling the needles,
needle carriers, double-ended needles mounted in
said carriers, sliders in both carriers arranged to 40 and means for controlling sliders to transfer
needles and cause needles to form stitches, which
control movements of said needles, and a plu
comprises causing empty sliders of one carrier
rality of successive control phases, each of said
to travel past the region of formation of stitches
phases including means for transferring needles
in a special path to insure their proper location
from sliders in one carrier tol sliders in the other,
to receive needles in a transfer operation.
means for retransferring needles fom sliders in
19. The method of controlling sliders in a knit
the second mentioned carrier to sliders in the
ting machine comprising superposed needle car
ñrst, means controlling sliders in the second car
riers, double-ended needles mounted therein, slid
rier` subsequent to the region of retransfer to
ers in both carriers for controlling the needles,
cause needles controlled by them to form stitches,
and means for controlling sliders to transfer
said means for controlling sliders in the second
needles and cause needles to form stitches, which
carrier leaving them in a position in which they
comprises effecting selection of sliders to alter
would be incapable of receiving needles in a sub
native positions, and causing all empty sliders of
sequent transfer operation, and means for con
at least one of the carriers to occupy a position to
trolling those sliders in the second carrier which
have retransferred their needles so as to avoid
action thereupon by the means for controlling
sliders in the second carrier to form stitches.
16. A knitting machine comprising superposed
_ receive needles at the location of transfer regard
less of any previous selection of sliders.
PAUL W. BRISTOW.
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