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Патент USA US3058335

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Oct. 16, 1962
L. BROWN ETAL
'
Filed Oct. so,- 1958
‘
3,058,325
STRAIGHT BAR KNITTING MACHINES
5 Sheets-Sheet I
yMu..H 6151. 5.871211%
Attorney
Oct. 16, 1962
L. BROWN EI'AL
3,058,325
STRAIGHT BAR xnn'rmc MACHINES
5 Sheets-Sheet 2
Filed Oct. 50, 1958
F/GS.
F/GB.
2
90’
Attorney
Oct. 16, 1962
L. BROWN ETAL
3,058,325
STRAIGHT BAR KNITTING MACHINES
Filed Oct. 30, 1958
5 Sheets-Sheet 4
Invenior
.
6 lb» w N
y yhumq, ismxe?
Attorney
0d. 16, 1962
L. BROWN ET AL
3,058,325
STRAIGHT BAR KNITTING MACHINES
Filed Oct. 30, 1968
5 Sheets-Sheet 5
Attorney
3,058,325?
a
i
Patented Oct. 16, 1962
2
3,ii58,325
STRAIGHT BAR KNETTKNG MA'CEWES
Leonard Brown, Nottingham, Albert Barradell, Lough
borongh, Leicestershire, and Neville Cuthbert Lad
brooite, Leicester, England, assigmors to William Cotton
Limited, Longhborough, England
Filed Get. 39, 15355, Ser. No. 770,736
Ciaiins priority, appiieation Great Britain Nov. 5, 1957
ll Ciairns. (til. 65--8S)
of the rib fabric, during which the newly fed yarn on
the needles of the second bed extends thereon from loops
knitted by the needles of the ?rst bed, and wherein said
yarn control elements are operable associated with the
needles of said second bed for the positive positioning
of the newly fed yarn to be on these needles.
The yarn control elements conveniently have pointed
blade ends, and the operating means are adapted to effect
such displacement of the yarn control elements as will
cause their pointed blade ends to engage under the newly
10
‘fed yarn and guide it into engagement with the abutments;
This invention relates to improvements in straight bar
The yarn control elements also conveniently have
knitting machines, and primarily rib machines. In such
latter machines there is usually provided adjustment
means operable to ensure that suitable relative move
their pointed blade ends slightly inclined upwardly to
assist in guiding cast o?? loops behind the needles with
ments are effected between the machine needles and the 15 which the yarn control elements are associated, i.e. in
a rib machine the horizontal needles.
vframe needles which will cause the old loops and new
yarn kinks to be disposed at suitable widely enough
spaced positions on the machine needles for the machine
needle beards to press between them.
However when certain yarn changes and/or quality
changes are effected this can alter the relative disposi
tions between the loops and the needle beards and it
becomes necessary to alter the said adjustments accord
ingly. This of course has to be done from time to time
to suit the yarn and quality at the different times.
25
The application Serial No. 623,370 discloses the broad
idea of having matched needles, knitting and idle in dif
terent beds in the production of plain knitting on all
needles of one set at one time, and rib knitting on needles
of each set at another time. However, it was found
The yarn control elements may be operably adapted to
cooperate with the associated needles from a side, or
above, or below the associated needles.
The yarn control elements may be mounted in associa
tion with mounting means for the bed of their associated
needles but operably adapted for independent movements.
The operating means may comprise cam operating
means and a cam on the main cam shaft of the machine,
which cam is selectable for operation of required times
by shogging of the cam shaft under control of pattern
means.
The above and other features of the invention set out
in the appended claims are incorporated in the construc
tion which will now be described, as a speci?c embodi
ment with reference to the accompanying drawings in
which:
FIGURES 1 to 7 show progressive steps in the pro
duction of rib fabric employing yarn control elements
to be dif?cult to obtain a separation of old loops and
new loops sufficient for the needle beard tips to be pressed
between the old and new loops. The US. Patent 2,978,
888 discloses an improvement of the earlier machine,
and provides control means by which the old and new 35 according to the invention,
loops are maintained separately to permit the pressing
of the needle beards.
However, the machine of the US. Patent 2,978,888
was only intended for knitting operations where there is
a change between plain and rib knitting. The knitting
machine of the present invention is provided with con
trol means which are used for ordinary rib knitting which
has the great advantage of avoiding the necessity for
periodical adjustments in accordance with yarn changes,
FIGURE 8 is a plan view of a needle and a yarn con
trol element,
FIGURES 9' to 11 show possible modi?cations,
FIGURE 12 is a cross sectional view of the machine,
FIGURE 13 is a front view of part of the machine,
FIGURE 14 is a plan view of a small part of the
machine,
FIGURE 15 is a detail view of main cam shaft shog
ging means.
Referring now to FIGURES l to 8 of the drawings,
or other changes, such as the size of the loops. In other
vwords, while the US. Patent 2,978,888 is concerned 45 a straight bar rib knitting machine is represented by
machine beard needles 1, having beards 2 with tips 3,
with the change between plain and rib knitting, the pres
and being mounted by their shanks 4 being held by a
ent invention is concerned with the control of old and
new loops during ordinary rib knitting.
needle bar 5, vframe beard needles 6 having beards 7,
v‘An object of the invention is to avoid the necessity
and sinkers 8.
for the adjustments to be effected from time to time for 50
There are also provided yarn control elements 9
said purpose by providing means to locate the new yarn
mounted in a support bar 10 and having tapered free
kinks in desired positions behind the beards positively.
end parts 11 with tips 12 and abutments 13 at the root
The invention provides a straight bar knitting ma
ends of these tapered parts 11.
chine having a bed of simultaneously operable needles
There is one of such yarn control elements 9 to each
adapted to have knitted loops and newly fed yarn on
machine needle 1 and normally disposed with the abut
them, yarn control elements associated with the needles
ments 13 and the free end parts 11 alongside the ma
and formed with yarn engaging abutments, and operat
chine needles vll respectively as best seen in FIG. 8.
ing means adapted to effect such simultaneous displace
In the production of rib fabric, each course is produced
ment of the yarn control elements along the needle
?rst by the frame needles 6 being in a raised position
shanks as will cause the latter’s abutments to positively
(FIGURE 1) to receive a new yarn, there being old loops
dispose the newly fed yarn in required position on the
14 on the frame needles 6 and old loops 15 on the
needles. Conveniently the needles are beard needles and
machine needles l.
the displacement of the yarn control elements is for
The frame needles 6 descend, with the sinkers 8 re
their abutments to dispose the newly fed yarn clearly
tracting until yarn kinks 16 of the new yarn (FIGURE
spaced from said loops and under the beards when the
2) are ready for dropping onto the machine needles 1
latter are open preparatory to the beards being closed.
oil‘ the sinkers 8.
The invention is primarily applicable to a rib machine,
At the stage of the yarn kinks 16 dropping oft’ the
which machine is provided with one bed of needles si-'
sinkers 8, the relative position between needles 1 and con
multaneously operable to knit one facial set of loops of 70 trol elements has changed and the yarn control elements
rib fabric before the needles of another bed are simul
9 are so disposed that their abutments 13 are spaced a
taneously operable to knit the other facial set of loops
short distance away from the machine needle beard tips 3
3,058,325
in a direction towards the machine needle bar 5; accord
ingly the yarn kinks 16 drop from the sinkers 8 into this
4
on a shaft 121 and has an arm 120a with a cam follower
12Gb riding on a cam disk 120a secured to earn shaft 19
space, each kink 16 being located on a needle 1 and on
and schematically shown as a circle in FIG. 12.
a control element 9 (FIGURE 3).
The holding bar 102 of machine needles 1 is moved
The yarn kinks =16 with old loops 15 on the machine
in conventional manner through the intermediary of a
needles 1 are normally at this stage fairly close together
mounting rod 22 by arms 23 (also FIGURE '13) from
and adjustments in the machine are provided whereby
a rocking shaft 24, the latter being rockable by follower
normally, when the needle beards 2 are pressed, the
lever 25 having a follower 26 for operation by a choice
beard points 3 press between the yarn kinks 16 and the
of three cams 27, 28, 29 schematically shown in FIG. 13
old loops 15.
10 under control of shogging of the main cam shaft 19.
However when there is a yarn change and/or quality
This shogging of the main cam shaft 19 is effected by en
change, the tendency is for the yarn kinks 16 to become
gagernent of followers (FIGURE 15) 30, 31 with a choice
inaccurately placed unless, in the known arrangements,
of cams 32, 33, 34 through the intermediary of link and
further adjustments are effected in the machine. To
lever means 35, a plunger 36 and spacing blocks 37, 38
avoid the necessity for these further adjustments, the 15 adapted to be moved into and out of operative position
yarn control elements 9 are advanced (by means which
determining the positions of the followers 30, 31 in re
may be of well known kind and are exempli?ed herein
lation to said earns 32, 33, 34 under control of pattern
after) so that their abutments 13 push the yarn kinks 16
means represented generally at 39, with a restoring cam
away from the oldloops 15 into a position well behind
40 and follower 41 movable also from said pattern means.
the machine needle beards 2 so that kinks 16 are posi_ 20
For needle beard pressing movements of the machine
tively located in this desired position clear of the beard
needles 1 there is a cam follower lever 42 with cam
tips 3 by the yarn control elements 9 (FIGURE 4) before
follower 43 co-operating with a cam 44 schematically
pressing.
shown in a circle in FIG. 12.
FIGURES 3 and 4 also show that during this time
The yarn control elements 9 are mounted (FIGURES
new loops 16a have been drawn from the yarn kinks 16, 25 12 to 14) in a bar 45 carried by horizontal arms 46 which
by the frame needles 6, through the old loops 14 on the
are pivotally mounted on bracket arms 47 secured to
frame needles 6. The machine needles 1 next advance
said rod 22 of the machine needle’s mounting means. The
to have their beards 2 pressed (FIGURE 5) so that the
arms 46 have supporting rollers 48 (to which downwardly
old loops 15 are landed on the beards 2.
biasing springs 48a are attached) which project outwardly
The machine needles 1 then retract to knock-over 30 therefrom and ride on ?xed horizontal guides 49 carried
(FIGURE 6) whereby new loops 16b of the yarn kinks
16 are drawn through the old loops 15.
At this stage the tendency is for the old loops 15 and
new loops 16b to remain at the same level as the ma
by brackets 50 from the template rail 51 of the machine.
The yarn control elements 9 are movable with the
machine needles 2 by virtue of the rod 22 but they are
also movable independently of the machine needles 1 in
chine needles 1 (FIGURE 6). It must be ensured that 35 a direction towards and away from the frame needles 6.
when the machine needles next advance, they do so with
For these latter movements the rod 22 is freely turnable
the new loops 16b riding only on their shanks 4 clear
of the yarn control elements 9. First, the yarn control
elements 9 are advanced (FIGURE 7) beyond the ends
of the machine needles 1 to a position adjacent to and
projecting over the loops 16b.
To facilitate this, the
yarn control elements 9 are of thin-blade-like form with
their free ends 11 having a tapered thickness (FIGURE
8) so as to provide a gap G between them and the
in the machine needle support arms 23, and is angularly
displaced by a depending arm 52 which is secured to
the rod 22 and has a pin and slot connection 53 with a
follower lever 54, which latter is freely turnable on the
shaft 24 and has a follower 55 coeoperating with a choice
of three earns 56, 57, 58 schematically shown in FIG. 13
on the main cam shaft 19 under control of said shogging
of the main cam shaft 19.
tapered ends of the machine needles 1. In addition the 45
In the illustrated position of-the cams the machine is
free ends 11 of the yarn control elements 9 may be up
prepared for rib knitting during which the machine needles
turned as shown at 12 in FIGURES l to 7.
1 and the yarn control elements 9 are operated by the
After this the yarn control elements 9 are retracted
cams 28 and 57 respectively which cams are shaped ap
to their initial positions as in FIGURE 1 for the next
propriately to obtain the movements required of the
50 machine needles and yarn control elements according to
course and so on.
FIGURE 9 shows that the yarn control elements 9 may
FIGURES 1 to 7. Shogging of the cam shaft may be
be cranked as at 9b to provide not only the abutments
effected to render the other cams 27, 29, 56, 58 operable
but to spread loops if required say for the penetration
appropriately at required times for producing a slack
by other needles.
course or a welt.
FIGURE 10 shows that the yarn control elements 9 55 During movement from the position of FIG. 1 to the
may operate from above the needles in co-operation with
position of FIG. 2, and from the position of FIG. 2
a groove 9c thereon, and FIGURE 11 shows that they
to FIG. 3, cam 28 effects simultaneous advance of needles
can operate from below the needles by having a cranked
1 and control elements 9 by moving shaft 22 through
and offset part 9d.
linkage 23, 24, 25, 26. Between the positions of FIGS.
For operation of the machine utilizing the yarn con 60 2 and 3, control elements 9 are less advanced than the
needles 1, since a corresponding track portion on cam
chine is constructed according to FIGURES 12 to 15.
57‘ acting through linkage 55, 54, 53, 52, 47 reduces the
advance of control elements 9 with needles 1 under con
Referring now to FIGURE 12 the machine is con
trol of cam 28. A cam track portion of cam 57 then
structed in conventional manner in respect of the sinkers
8, the knocking over bits 17, the thread carrier 18, the 65 effects advance of control elements 9 relative to needles
1 to push the kinks 16 under the beards 2 until the position
main cam shaft 19, the frame needles 6, and the 'latter’s
of FIG. 4 is obtained. In the position of FIG. 5, the
cam operated mechanism. The frame needles 1 are held
trol elements as shown in FIGURES 1 to 8, the ma
needles 1 and control elements 9 are raised by cam 44
in a bar 20a to which an arm 20b of a bell crank lever
20 is secured. The other arm 20c of the bell crank lever
‘through linkage 42, 42a, 42b, 42c, acting on needle bar
20 has two notches 20d, each of which can be placed on 70 102 and shaft 22 so that beards 2 are pressed. Needles
a pin 21:: on an arm 21b of a bell crank lever 21 whose
1 and control elements 9 are the retracted under con
other arm 21d supports a cam follow roller 21e which
trol of cam 28 to the position of FIG. 6. Then a cam
rides on the periphery of a cam disk 21]‘ schematically
track portion of cam 57 acts on follower 55 to advance
shown as a circle in FIG. 12, and secured to cam shaft
control elements 9 relative to needles 1 so that the position
19. Another bell crank lever 120 is turnably mounted 75 of FIG. 7 is obtained. Cam followers 55 and 26 then
3,058,325
5
6
run on cam track portions of cams 57 and 28 which place
said second control means includes a rotary cam and a
cam follower connected to said needle means; and includ
ing a cam shaft carrying said cams.
needles 1 and control elements 9 in the position of FIG. 1.
What we claim is:
1. In a straight bar knitting machine, in combination,
5. In a straight bar knititng machine, in combination, a
a needle bar, and a set of machine needles mounted on
needle bar, and a set of machine needles mounted on said
said needle bar and having shanks, beards, and tips on
needle bar and having shanks, beards, and tips on said
said beards; a set of sinkers having noses respectively
located in the region of said beards; a support member
beards; a set of sinkers having noses respectively located
in the region of said beards; a support bar and a set of
yarn control elements mounted on said support bar and
and a set of yarn control elements mounted on said sup
port member and respectively located adjacent said
machine needles, each yarn control element having an
respectively located adjacent said machine needles, each
yarn control element having an abutment and a free end
abutment and a free end beyond said abutment; and
beyond said abutment; and operating means including
operating means operatively connected to said support
?rst means connected to said needle bar for advancing
and retracting said needles, second means operatively
relative to said machine needles for moving said control 15 connected to said support bar to move the same and said
control elements relative to said machine needles, and
elements between a ?rst relative position in which said
third means interconnecting said ?rst and second means
abutments are spaced from the tips of said beards and
for effecting relative movement of said needles and con
located adjacent the shanks of said machine needles, and
trol elements between -a ?rst relative position in which
said free ends are under said sinker noses to receive, to
gether with said machine needles, yarn kinks from the 20 said abutments are spaced from the tips of said beards
and located adjacent the shanks of said machine needles,
same, and a second relative position in which said abut
and said free ends are under said sinker noses to receive,
ments are disposed in the region of said needle beards
together with said machine needles, yarn kinks from the
whereby the yarn kinks are pushed under said beards
same, and a second relative position in which said abut
and are held there by said abutments adapted to be spaced
ments are disposed adjacent said needle beards whereby
from old loops on the shanks of said machine needles
member to move the same and said control elements
so that said tips of said beards are located between old
loops and new loops when said beards are pressed.
2. In a straight bar knitting machine, in combination,
the yarn kinks are pushed under said beards and are held
thereby said abutments adapted to be spaced from old
loops on the shanks of said machine needles so that said
tips of said beards are located between old loops and new
said needle bar and having shanks, beards and tips on 30 loops when said beards are pressed.
6. -A knitting machine as set forth in claim 5 and in
said beards; a set of sinkers having noses respectively
cluding guide means for guiding said support bar and
located in the region of said beards; a support bar and a
said control elements parallel to said machine needles.
set of yarn control elements mounted on said support
7. A knitting machine as set forth in claim 1 wherein
bar and respectively located adjacent said machine
needles, each yarn control element having an abutment 35 said control elements are disposed above the respective
machine needles, said machine needles having grooves for
and a free end beyond said abutment; and operating
receiving said free ends of said control elements and said
means including ?rst means operatively connected to said
tips of said beards.
needle bar and to said support bar for moving the same
8. A knitting machine as set forth in claim 1 wherein
and said needles and control elements simultaneously and
together relative to said sinkers, and second means opera 40 said control elements are disposed under the respective
needles and have a cranked portion forming said abut
tively connected to said support bar to move the same
ment.
and said control elements relative to said machine needles
9. A knitting machine as set forth in claim 1 wherein
for moving said control elements between a ?rst relative
said free ends of said control elements taper in thickness.
position in which said abutments are spaced from the tips
10. A knitting machine as set forth in claim 9 wherein
of said beards and located adjacent the shanks of said 45
said free ends are upturned and adapted to abut on loops
machine needles, and said free ends are under said sinker
retained on said machine needles.
noses to receive, together with said machine needles,
111. A knitting machine as set forth in claim 1 wherein
yarn kinks from the same, and a second relative position
said control elements and said machine needles are lo
in which said abutments are disposed adjacent said needle
beards whereby the yarn kinks are pushed under said 50 cated in a common plane and wherein said abutments of
said control elements are laterally cranked portions lo
beards and are held there by said abutments adapted to
cated in said plane for spreading loops.
be spaced from old loops on the shanks of said machine
needles so that said tips of said beards are located be
References Cited in the ?le of this patent
tween old loops and new loops when said beards are
UNITED STATES PATENTS
pressed.
35,254
Peberdy _____________ __ May 13, 1862
‘3. A knitting machine as set forth in claim 2 wherein
a needle bar, and a set of machine needles mounted on
621,723
1,941,903
2,010,624
2,236,325
2,339,153
2,428,405
2,430,882
2,469,360
Lowe _______________ __ May 21,
Lieberknecht __________ ..._ Jan. 2,
Clauss _______________ .__ Aug. 6,
Vorck ______________ .._ Mar. 25,
Cotterill ______________ __ Jan. 11,
Young _______________ __ Oct. 7,
Ludwig _____________ __ Nov. 18,
Amidon _____________ __ May 10,
4. A knitting machine as set forth in claim 3 wherein
2,480,175
Young ______________ __ Aug. 30, 1949
said ?rst control means includes a rotary cam and a cam
2,775,108
2,978,888
Bellini _____________ __ Dec. 25, 1956
Ladbrooke ___________ __ Apr. 11, 1961
said ?rst means includes a shaft ?xedly supporting said
needle bar, a movable support supporting said shaft, and
?rst control means for moving said movable support,
and wherein said second means includes a lever means 60
turnable on said shaft and connected to said support bar,
guide means for guiding said support bar parallel to said
machine needles, and second control means for moving
said lever means.
follower connected to said movable support, and wherein
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