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Патент USA US2128453

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Aug. 30, 1938.
R. H. COLEMAN
2,128,453
STRAND FEEDING MECHANISM FOR KNITTING MACHINES
Filed Nov. 17, 1936
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Ro eem' H. COLEMAN
Aug. 3o, 1938. `
R H, COLEMAN
2,128,453
STRAND FEEDING MECHANISM FOR KNITTING MACHINES
Filed NOV. 17; 1956
2 Sheets-Sheet 2
52,128,453'
Patented Aeg. 3o, 193s> I i
i UNITED vSTATES PATENT opngg
STRAND FEEDING MECHANISM FOR.
KNITTING MACHINES
Robert H. Coleman, Thomasville, N. C., assignor
of >one-fourth to Ragan Knitting Company,
Thomasville, N. C., a corporation of North
Carolina, and one-.fourth to Maurice Mills
Company Inc., Thomasville, N. C., a corpora
tion of North Carolina
Application November17, 1936, Serial No. 111,309
'
4 claims.
(c1. ca_-12,5) "
This invention relates'to a knitting machine
» and more especially to means for laying ina
leading edge so‘that if the latches of the cylinder
needles are not fully opened it will either open
- such latches or close the- same and thereby pre
strand in automatic knitting machines employ
ing cylinder and dial needles.
vent breakage" of the irregular need1es,._ even
In automatic seamless knitting -machines em'
ploying both dial and cylinder needles, it is_ a
well known fact that these machines are capable
though it results in defective work when a latch
is closed by said cam surfaces.
^ _
This application is a continuation in part of my -
of knitting al welt at they top of the stockingto-- (zo-pending application Serial No. 757,521, filed
_gether with a ribbed portion and a' leg portion ‘ December 14, 1934, which on November 24,1936,
10
became Patent No. 2,062,208.
_
.
10 together with heel, toe and foot portions, in
„other words, knitting‘a complete stocking with
Some of the objects of the invention having
been stated, other objects will appear as the de
the- exception of looping the toe after the stock
ing is completed on the knitting machine. Other" scription proceeds when taken in connection with
types of dial knitting machines such as ribbed
the accompanying drawings, inwhichz-
_
Figure 1 isV an elevation of a portion of a knit
inverse machines and split foot machines, knit
the complete stocking except the welt.
ting-machine showing the cylinder and meansfor
_, It has been desirable to use an elastic'strand in
' the ribbed top portion of the stocking to make a. l
feeding the elastic yarn to a portion of the knit-_
ting machine so that it will be knittedA by some of
stocking which will be self-supporting and which
20 _ will remain in elevated position on the leg of the
- wearer without the necessity of employing sup
porters of any kind.
"
-
the needles vbut will not be knitted by all of the `
cylinder or dial needles;
line 2--2 in Figure 1;
'
It has been possible >to knit _an elastic strand '
‘
.
20
-
Figure 21s a vertical sectional view taken along
,
» Y
.
Figure 3 is a View showing_ the main and pat
in the ribbed top portion but this takes 'a great ‘ tern drums of the machine for operating the
25 quantity of yarn and also greatly decreases the
elasticity of the yarn on account of knitting it
into the ribbed top portion under tension. Ithas
25»
means for feeding the elastic strand to the knit
ting
machine;
'
l
`
‘
Figure 4 is an enlarged elevation of the lower>
long been desired Íto knit the top ribbed portion ' end of the feeding ñnger for the elastic strand
and to lay the elastic strand thereinto, but 4it is
a well known fact that an elastic strand cannot
be fed into /the needles at the conventional point
of feeding because it would result in knitting the
strand into the stocking by use of the dial and
cylinder needles~
35
_
'
-
l
'
It is therefore, an object of- this invention to
provide means. whereby an elastic strand can ber
laid in~or knitted in the ribbed top portion of the
stocking so that the dial needles andthe cylinder
shownfin cooperation with some of the cylinder
30
needles;
'
'
'
'
Figure 5 is a view> looking at the left-hand side
of Figure 4;
_ ~
_,
Figure 6 is a top plan view of the dial cap and
' latch ring, showing the feed finger for the elastic
strand in section;
„
35
_
Figure '7 is an elevation of the top of a stocking
made in .accordance with my invention; l
,
needleswill knit the conventional top yarn around
Figure 8 is an elevation showing the manner in
lwhich the elastic strand is laid in the knitting and
and knitting it in any manner at all wales at all
separated and distended- position;
y40 the elastic yarn without engaging the elastic yarn - showing the loops in the knitting in a greatly 40
courses.
‘
'
»
_ It is another ,object> of the invention to provide
ina knitting machine a strand feeding ñnger
having means _for positioning the lower end there
of immediately outside the cylinder needles and
having an`eye thereinffor feeding a strand below
the latches of the cylinder needles.à
It isa further object of the invention to pro
50 vide a strand feeding finger in knitting machines
having an' eyelet near its lower end -through _
which a strand may be fed to some of the cylinder
needles or below thelatches thereof .before they
reach the ~throat plate of the machine, saidv
ñnger having one or more‘caml surfaces 0n its
Figure' 9 is a bottom plan view of Figure 8; _
Figure 10 is an elevational detail showing dial
and cylinder needles engaging the top yarn and
showing the elastic lyarn'being laid in;
_ 45
Figure 11 is a diagrammatic view looking downv
on Figure 10 and showing additional loops;
Figure 12 is a side elevation of the lower end of .`
a modiñed form of my’strand feeding finger;
Figure 13 is an edge View looking from the _left 50
in Figure
12;
"
.
_
l
-
Figure 14 is an elevation 'of the lower end of an
other modifìed form of my strand feeding ñnger;
Figure 15 is an edge view looking from the left
in Figure 14T
55
2
2,128,453
Referring more specifically to the drawings,
. the numeral I0 indicates a bracket for support
ing the dial needle mechanism» of the machine
which also supportsa suitable cross-bar II sup
porting other portions of the knitting machin
ery.`
On this cross-bar there is secured a mem
'I'he lower» end of the yarn feed finger I4
projects in the direction of travel of the dial
and-cylinder of the machine and projects down
„ wardly and inwardly at the same time and has
an eye 44 therein through which the elastic
strand 30 is passed so as to deliver the yarn to the
ber I2 which heretofore has been provided to needles at a pointwher’e'no knitting will occur
form guideways for a yarn feeding finger for and at a point below the dial needles and below
feeding yarn to the needles at this point in case 4the latches of the cylinder needles so that it
10 of making what is called a “wrap”. 'I'his com
will not be engaged thereby and at a point where 10
prises the member I 2 having notches therein the cylinder needles will likewise not engage it so
which are closed by plates I3 and I3a forming a that the cylinder needles -will engage alternate
groove in which the yarn feeding finger is adapt-_ loops on the ordinary strand and the dial needles
, ed to have vertical sliding movement. The wrap will engage the other loops so that the strand is.
15 ñnger is dispensed with and in lieu thereofv a spe
knitted across the elastic stran'd in the manner
' cial finger ,I4 is provided for feeding the elastic shown in Figures 8 to 11 inclusive, without either
yarn to the knitting machine so that it will not be the cylinder or dial needles knitting the elastic
knitted by all ofthe dial or cylinder needles, but strand, `except _for a loop or two, but merely
may be knitted at_one or two loops and laid in as laying it in, in the manner shown and described.
20 shown in my patent application, Serial No.
The dial cap 33 has the conventional leaf 20
757,521, filed December 14, 1934, which matured ‘ spring yarn clamp 45 thereon. It also has the
into Patent No. 2,062,208, on November 24, 1936, _conventional movable yarn clamp 46 thereon ,
or may be knitted at alternate wales and atal
which is operated in a conventional manner. It
ternate courses as set forth in my other appli
also has conventional shears 41 thereon which- is
also operated in a conventional manner. The 25
25 cation being filed of even date herewith, Serial
No. 111,308.
'
clamp >46 and the shears 41 are operated by suit
The member I2 not only supports the vertical
ly sliding member I4'but also supports a tension
spring I5 which normally pulls the yarn feed
30 ñnger I4 downwardly. The yarn feed finger I4
has a laterally projectingv pin I6 under which one
1 arm of the bell crank lever I1 is adapted to pro
ject, said bell crank lever- I1 being pivotally
mounted as at I8, and having its other end con
nected to a link I 9, which, in turn, 'is slidably con
nected to a lever 20. The lever 20 (Fig. 3) is
seen to be ñxedly secured to a stub arm 2I on a
hub 22 mounted on a shaft 23 and fìxedly se
cured to> hub 2_2 is an arm 24 which is adapted
40 to follow a'. cam 25 on the auxiliary pattern drum
26 of the knitting machine.
Lever 20a is also
ñxedly secured to arm 2I and is adapted to con
tact the main pattern drum 21 of the knitting`
machine and to be moved by a cam 28 thereon.
The elastic strand 30 is fed through a yarn
guide 3| and downwardly just inside the latch
ring 32. The yarn feed finger I4 likewise pro
jects downwardly just inside the latch ring 32
and just outside the cylinder needles. 'I'he dial
50 cap 33 has a dial 34a rotatably mounted there
in which has a plurality of dial needles 34 and
35 mounted therein which are controlled by suit
able cams -not shown. The numeral» 34 indicates
the hook needles while 35 indicates the cast-olf
The cylinder 36 of the machine has
mounted therein a plurality of cylinder needles
31 which are of the conventional typeand each
55 needles.
has a pivoted latch 38 thereon. .
The yarn feed finger I4 >projects downwardly
immediately outside the cylinder needles and on
account of the close space in which it has 'to
work it must be provided with some means to
prevent breakage of the cylinder needles. Ac
cordingly, the lower end of the yarn feedñnger
65 has a V-shaped cam having surfaces 40 and 4I
terminating in a point 42, . This ypoint 42 is
slightly above the pivot points of the latches for
the cylinder needles, so that it is seen that the
_ cam surfaces 40 and 4I will serve to either open
70 or close the latches of the cylinder needles as
they pass thereby, and therefore, prevent break
age of the same.
This _is very important.
In
able instrunientalities, not shown, controlled by
the auxiliary pattern drum when the elastic
strand is withdrawn from laying in position.
The dial cap has- its upper surface beveled on
the side next to the throat plate 48 and the yarn
so
fingers 49. In order to introduce the elastic
'strand at a thin place in the dial cap where it
will traverse the cylinder needles, I mount a pin
50 in the dial cap to prevent the elastic strand 35
from passing over the high edge of the dial cap
and being held where it will not be engaged by
the hooks of the cylinder needles when it is ln
troduced to laying in position.
In Figure l the elastic strand is shown after
it has been introduced and has passed completely
around the cylinder and has passed inside the
cylinder needles at the throat plate and is being
laid in.
'
'
, Although Figure 2 is `taken alongthe line 2-2 45
in Figure 1, the elastic strand 30 is shown in a
different position, being in the position it occu
pies when ñrst lowered to a position where it
will be caught by the hook of one of the cylinder
~needles, as it is seen that in introducing the 50
elastic strand, it is passedv between two cylinder
needles and being held _by the spring clamp 45
the hook of a cylinder needle will carry the elas
tic strand around- to knitting position where the
end of the elastic strand is pulled from beneath 55
the spring clamp. Although the elastic strand4
will be caught and knitted by one or two needles,
the'subsequent cylinder needles will not knit in
the elastic strand for the reason that it fed at 60
a point below the latches and on top of the sink
ers which will cause it to ride over the tops of
the cylinder needles when they are lowered in a
knitting operation.
,
Itv will be observed in Figure 3 that the pattern 65
drum 21 serves to lower the yarn feed finger when
the lever 20 falls into the cavity in the cam sur
face, but it -is also evident that this main drum `
cannot be used for throwing th'e elastic strand .
out of position where it will be laid into the fabric 70
because it moves too slowly and would not raise '
the yarn feed finger I4 quickly enough, and
therefore, means are provided whereby the auxil
be produced, but this is preferred to the break- ' iary pattern drum can be employed for throwing
,
75 ing of needles. the elastic strand out of operation after a pre 75
»case a' latch is closed a defective lstocking will
3
2,193,4534
.
the wales formed by the dial needles and the cyl- '
inder needles.
In Figures 8 to 11 inclusive, there is shown the y
manner in which the elastic strand is laid in the
knitting of the ribbed top. It is seen-that the
Icylinder needles 31 engage the top yarn t and
iary pattern drum 26 will throw the elastic strand- -that the dial needles 34 and 35 engage the top
out of operation long before,the main drum 21 yarn between the loops formed bythe cylinder
has moved far enough for cam 28 to engage the
and Figure 10 shows the hook and cast
lever 20a and therefore the -auxiliary pattern needles,
oiî dial needles in position where they move their
drum will throw it out of operation and not in
loop outwardly over the laid in elastic strand to a
_10 `terfere with the top of the stocking.
point where the hook needles 34 will‘engage the
a
finished
top
is
shown
asmade
onl
‘InFigure ’7,
next course of top yarn t and then the cast-olf
one type of machine i'n which usually` a. small needle
will cast off the already formed loop onto
welt W will be knitted and then the yarn feed the new loop _being , formed by the hook dial 15
finger i4 will be automatically lowered and the
needles. This lays the elastic strand in between
portion E will have the elastic strand laid there
the 'wales formed by the dial needles and the
into, which will be withdrawn long before the wales formed by the cylinder needles. The knit
top ribbed portion has beenrcompleted andthe ting of the dial’ and cylinder needles is in the
remainder of the top will be knitted of ordinary
ribbed fabric by the dial and cylinder needles but conventional manner,`but a description of same
20
has been made‘in order- to show how the elastic
without laying the elastic strand therein, al
strand is laid in during this ribbing operation.
though it is evident that the entire ribbed por
The cylinder needles form the loops c, while
tion could have a strand either elastic or other
determined number of courses of elastic- strands
have been laid into the ribbed top.
Let us assume that the cavity appearing in the
cam surface 2B of Figure 3, represents the length
of the'top of the stocking. Therefore, the auxil
wise, laid therein, if desired.
the dial needles form the loops d.
The latches in the needles will be entirely openv 2,5
if the machine is operating properly by having
top yarn fed thereto, and the conventional latch ,
opener in the machine is functioning properly,
and the needles are being lowered properly by
the needle leveling mechanism. Now if the top 30
»
-It is also well understood in the art, that in
25
knitting ribbed fabric that alternate cylinder
needles are used with all ,of the dial needles, as
there are twice as many cylinder needles as dial
needles and by using half of the cylinder needles
30 only, then the dial needles pass between the cyl
inder needles and engage the knitting strand be
tween' the cylinder needles thus resulting in al-
yarn breaks, or the needles are not leveled or '
lowered properly due to some imperfection of the
'
machine, -resulting in the latches not being en
ternate loops being engaged by the hook ' dial
needles and the other loops are engaged bythe
cylinder needles.
tirely open but occupying a position below a hor- n
izontal plane passing through the pivot point of- 35
'
The elastic strand is threaded through the yarn
the latch, then the lower cam surface ,4I will
strand finger is_ lowered one of the cylinder
40 needles engages the elastic strand because from
pin‘5ll to eye _44, it goes in front of one of the cyl
inder needles. This needle, and possibly another,
entirely closed, then of course, it is evident lthat
they could not take the elastic strand and the
upper cam surface 40 would completely close
these latches resulting in an imperfect knitting,
' but it would prevent the needles and latches of
the machine from being broken.
' `
Figuresiz and 1_3 s_ ow a slightly modiñed form
of feed lingerr` 52 which has‘integral -with `the
lower end thereof an outstanding projection 53
Ícomplete the opening of the latches. `If. the
> feed finger I4 and placed under the conventional
clamp and in front of pin- 50 and when the elastic latches should -be projecting upwardly but .not
receives the same in their hooks to be knitted in
along with the top yarn at the knitting point,
l45 and then the yarn is carried around on the out
side of the cylinder needles and when it reaches
the throat plate, where'the conventional knitting
through which a suitable inclined eyelet 54 is _
operation takes place, the conventional knitting ’ provided. The projection 53 is disposed onthe
occurs which consists of a course -of the top yarn side of the finger which is farthest removed from
being engaged by alternate> cylinder needles as
only one-half of the cylinder needles are in oper
ation during thisoperation and the hooked dial
50
needles move out between
the ` cylinder needles >
and engage- the top yarn and pull the alternate
55 loops back against the dial and then the alternate
cylinder needles from their loops. At this-point,
the cylinder needles, being lowered, allow the
the hooksI of the needles 31 in. order that‘Íthe
linger may be operated in close proximity to theA
needles. The finger is also provided with an en- 1
largement or heel 55, said -heel having inclined ’
beveled surfaces 56 and 51 which meet at a.
common point 58. Likewise, this point is adapt
ed to be placed at an elevation which is sub
'stantially the same as -the vpivot point of the
elastic strand to pass in and rest on the loops latches so that any latches which' might be par
held by the hooked dial needles. On the next
6.0 revolution, the elastic strand being laid on all
of the loops held by the hook dial’needles for a
complete revolution, the second and subsequent
tially opened or closed as they pass .the ñnger,
will be deflected downwardly or upwardly by bev
eled surfaces 56 >or 51.
‘In Figures 14 and 15, still another modified
knitting operations take place on the second and . form of finger is shown, which is denoted by
subsequent revolutions of the knitting machine reference character 60. This ñnger has an out
65 which repeats the above described operation, that
is, the cylinder needles engage the top yarn and
at the same time the hook dial needles and the
standing lug 6I integral with its lower cend
through which an eyelet 62 is provided whose lon
gitudinal axis is substantially parallel to the 'di
' cast-off dial needles move out and the hook dialN ‘ rection of travel of the cylinder needles. The pro
75
needles engage the strand of yarn being knitted
jection and eyelet are disposed on the side of 70
andthe‘cast-off needles cast oiî the loops held by
the cast-'off ldial needles onto the loop being
formed at that time by the hooked dial needles.v
hooks of the cylinder needles 31.for the same
reason as set forth in the preceding form. It is
It is thus seen that the elastic strand is not
knitted except at its ends but is laid in between
the finger 60 which is farthest removed'from the
desirable, at times, to position the eyelet in this
manner Aso that the amount of friction producedv
n
i
4-
f
2,128,453
as strand 30 passes through the eyelet 62 to
the needles 31 will be materially reduced; how
ever, it is not possible to deliver the strand 30 as
close to the needles in this form as in the form
shown in the preceding ñgures where the outlet
of the eyelets are disposed on the side of the
feed finger which is adjacent the needles. AA
heel 63 is provided which has arcuate surfaces
or edges 64 and 65, said edges intersecting as at
B6. This point 66 is also adapted to operate at
an elevation substantiallyv the same as that of
the pivot points of the -latches 38, when they pass
theA ñnger 6U, so that any latches which are
outstanding- will be either closed or opened by
beveled edges 64 or 65, thereby preventing dam
age to the needles.
,
When the ribbed top of a stocking is knitted on
a Scott & Williams model HH knitting machine
it is customary to use alternate cylinder needles
20 and all of the dial needles. It will be noted by
referring to Figure 1 that the conventional di
viding cam 31h engages the butts 37a of the low
needles 3l and forces these needles downwardly
immediately before these needles reach the point
25 o_f introduction of the elastic strand 30, whereas,
the alternate high needles are disposed at such
an elevation that their butts 31a will pass over
cam 31h. This cam will prevent the hooks of
the alternate loW needles from engaging the
strand 30 at any time.
'
‘
In the drawings and specification, there has
been set fo-rth a preferred embodiment of the
invention, and although specific terms are em
ployed, they are used in a generic and descriptive
sense only, and not for purposes of limitation,
the scope of the invention being set forth in the
appended claims.
I claim:
-
1. 'in a knitting machine having revolving dial
needles and also having cylinder needles provided
with pivoted latches and also having revolving
dial needles, a vertically movable yarn feed ñn
ger for feeding a strand to the outside of the
cylinder needles thereof and below the latches
thereof, and below a horizontal plane defined by
the dial needles so that the strand will be inlaid
between the loops formed by the dial needles and
the loops formed by the cylinder needles, the lead
ing edge of the lower end of said ñnger having a
pair of diverging cam surfaces thereon Vand occu#
pying substantially the same vertical plane for
engaging and opening or closing the latches of
any needles which are notv already opened.
2. A yarn feed'?inger for knitting machines,
provided with revolving cylinder needles having
pivoted latches and also having dial needles, com
prising a yarn feeding portion disposed on the
outside of the cylinder needles and having an eye
disposed below the latches of the needles and
through which the yarn is passed to the exterior
of the needles and below the latches thereof to
be inlaid between the loops formed by the dial
and cylinder needles, and having a cam surface
in advance of and above the eye for engaging and
moving the latches of any needles whose latches
are not completely opened.
3. In a knitting machine having revolving cyl
inder needles and dial needles, and a throat plate
having yarn feedv fingers for feeding yarn to the
needles, a strand feeding finger disposed .imme
diately outside the cylinder needles at a point
where the needles will pass the strand feeding
iinger -before they reach the throat plate, said
finger having an eye, in its lower end for feeding
an inlay yarn below. the latches of the cylinder
needles, means for lowering the strand` feeding :
ñnger to a point Where its strand will be engaged
by tli'e hooks of some of the needles and fed below
the latches of the other needles to thereby knit
the strand at some needles and lay itin at the
other needles.
4. In a knitting machine, a yarn feed :linger
nr
In)
disposed for vertical movement immediately out
side the cylinder needles of said machine at a
point in advance of the throat plate of said ma
chine, said ñnger having diverging surfaces nearits lower end for opening or closing the latches
of any needles which may have their latches par->
tially opened, and having an eye in its lower end
for feeding a strand on the outside of and below
vthe latches of the needles.
ROBERT H. COLEMAN. -
4.1
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