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Патент USA US3026706

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March 27, 1962
MT PHILIP
3,026,695
KNITTING MACHINE CAM MECHANISM
Filed June 30, 1958
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INVENTOR.
Morris Philip
BY
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HIS
ATTORNEYS
. March 27, 1962
M. PHILIP
3,026,695
KNITTING MACHINE CAM MECHANISM
Filed June 50, 1958
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INVENTOR.
Moms Phlhp
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HIS
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United States Patent ()?ice
1
31,26,695r
Patented Mar. 27, 1962
2
needles of the ?rst set commence to move up (or be ex
3,026,695
KNKTTENG MAC
.
tended), to clear and to take on yarn, before the needles
(JAM MECHANISM
of the second set reach the bottom (or inner end) of their
movement and complete the stitch.
This arrangement of the cams has the surprising result
that, for example, on a thirty inch knitting machine it has
been possible to increase the number of feeds from
thirty-two to forty-eight, an increase of ?fty percent in
Morris Philip, 26 Bruckner Blvd, Bronx, N.Y.
Filed June 341, 1958, Ser. No. 745,518
7 Claims. (Cl. 66-20)
This invention relates to circular knitting machines
and especially to machines for knitting the interlock stitch,
or other stitch employing two sets of needles in each bank.
The two sets of needles may be mounted on either a con
10
the number of feeds for the same size of 1apparatus.
The invention will be further understood from a con
ventional cylinder or a dial, or on both cylinder and dial,
and each set has its own group of operating cams. Ma
sideration of the accompanying drawings and the follow
ing additional description. In these drawings:
chines for knitting the interlock stitch have both cylin
' FIG. 1 is a bottom face view of a portion of the dial
der and dial needles.
cams constructed in accordance with the invention;
One set of the cylinder needles may be referred to as 15 .} FIG. 2 shows an inside face view of a development of
set 1 and may comprise the alternate needles, set 2 being
a portion of the cylinder cams constructed in accordance
composed of the intermediate needles. The needles of
with the invention;
set 1 are usually short needles and are actuated by the
FIGS. 1a and 2a are similar views showing the dial and
cams of cam group I mounted on the cam support, or
cylinder cams as arranged in accordance with the prior
cam ring, and near the hooks of the needles. The needles 20 art.
of set 2 are longer needles and cam group 2 which oper~
Referring ?rst to FIG. 2a, this shows the cam arrange
ates them is disposed on the cam support below the
ment for the cylinder needles as heretofore employed, the
group 1 cams. The dial needles are similarly arranged,
row of cams in the upper half of this ?gure constituting
that is, set 1 is composed of the alternate needles which
the cams of group 1, while the lower row constitutes the
are short needles and operated by cam group 1 of the dial 25 cams of group 2. Both cam groups are carried on a cam
cams which is arranged close to the needle hooks. The
ring 5 which rotates counter clockwise as indicated by the
needles of dial set 2, the intermediate needles, are long
arrow, the cams being viewed from the inside in both
needles and their operatingcams, cam group 2, are dis
FIGS. 2 and 2a. The group 1 cams operate the cylinder
posed radially inwardly of cam group 1.
needles of set 1, that is, the short and alternate needles,
Each group of cylinder and dial cams includes a clear 30 whereas the group 2 cams operate the long needles which
ing or raising cam and a stitch cam and may include a
are placed intermediate the other needles and constitute
set 2.
release cam. The clearing cam raises the cylinder needles
correspondingly, in FIG. 1a the lower circle of cams
(extends the dial needleslto clear the latch from the
old loop and to take on yarn. The stitch cam draws the
will be referred to as group 1 and they operate the short
cylinder needle down (dial needle back) and knits, i.e., 35 dial needles (dial set 1), whereas the inner circle of cams
casts off the old loop and pulls a new one through it. The
constitue group 2 and operate the long dial needles (dial
cylinder release cam raises the cylinder needles slightly
set 2.)
to relieve stress on the yarn of the formed loops and
In FIG. 2a the cylinder cams of cam group 1, at any
otherwise settles the needles while the dial needles take
one feed, comprise a clearing cam C1, a stitch arm S1, a
over, that is, while-the corresponding dial stitch is being 40 release cam R1 and a guide cam G1. Similarly, the cams
drawn.
7
In knitting machines of this type as heretofore con
of cam group 2 comprise a guide cam G2, a clearing cam
C2, a stitch cam S2, and a release cam R2. The dial cams
structed the cams of each group on both the cylinder and
dial were so arranged that, while the needles of one set
of groups 1 and 2 (FIG. 1a) are similarly designated, and
they are carried on the dial cap 6 which also rotates
were being operated by the three cams (clearing cam, 45 counterclockwise as indicated, the cams being viewed
from beneath.
.
stitch cam and release cam),. the needles of the second
set of both the cylinder and dial were held in idle posi
Guide cam G2 is straight and parallel to the edge of
tion by means of a guide cam. In other words while the
the cylinder throughout the extent of cams C1, S1 and
needles of one set were knitting, the needles of the other
R1, and guide cam G1 is parallel throughout the extent
set were idle. This applied to the dial needles as well as 50 of cams C2, S2 and R2. Consequently it will be under
the cylinder needles.
stood that while the cylinder cams C1, S1, and R1 are
The ‘aim of the present invention is to increase the pro
operating the needles of set 1 to clear, take on yarn and
ductivity of knitting machines of this type, and, moreover,
knit, cylinder cam G2 of cam group 2 maintains the cylin
to accomplish this without increasing the angularity of
der needles of set 2 in idleness. Also following the com
55 pletion of the knitting cycle of set 1, the needles of this
the cams.
'
In accordance with the invention the cams of one group
are so arranged with respect to the cams of the second
group, on either or both cylinder and dial, vas to cause the
set are held idle while the needles of set 2 are operated by
cams C2, S2 and R2 of cam group 2 to clear, take on yarn
and knit.
,
,
.
needles of the second set to begin to rise (or extend-in
Referring to FIG. 1a which shows the dial cams in
the case of the dial needles) While the needles of the 60 bottom view, the guide cams GID and G2D are circular
?rst set are still on the way down (or on the way in)
instead of straight, so that while the needles of set 1 at
drawing the stitch, so that the needles of the second set
any given feed are being operated to knit by the cams
reach their high point approximately as the needles of
C1D, 81D and R1D, the needles of set 2 at this feed
the ?rst set complete their cycle, and, further, so that the
are held inoperative or idle. Also the needles of set 1
3,026,695
Ll
at any feed are held idle, while the cams C2D, 82D, and
R2D carry the needles of set 2 at this feed through a
knitting cycle.
clearing movement while the needles of the ?rst set are
still moving to knit so that the needles of the second set
reach their point of extreme movement approximately as
the needles of the ?rst set complete their cycle, and further
Such is not the situation, however, in the cam arrange
so that the needles of the ?rst set commence movement to
ment of the present invention. This will be understood
clear before the needles of the second set complete their
from FIGS. 1 and 2 which show the cams in face view,
knitting movement.
FIG. 1 looking from the bottom and FIG. 2 from the
2. In a camming mechanism for a circular knitting
inside. The cam ring 7 (FIG. 2) carries the cylinder cam
machine employing two sets of needles and having two
groups 1 and 2, and the dial cap 8 (FIG. 1) the dial cam
10 groups of cams one for each of said needle sets, the im~
groups 1 and 2.
provement wherein the cams of one of said groups are
Referring to FIG. 2, the guide cam G1 of cylinder cam
so arranged with respect to the cams of the second group
group 1, instead of being straight and horizontal through
as to cause the needles of the second set to begin to rise
out the extent of the knitting cycle of the cams of cylinder
while the needles of the ?rst set are still on the way down
cam group 2, as in FIG. 2a, is terminated at about its
so that the needles of the second set reach their high
mid-portion. The leading or lower end 9 of clearing
point approximately as the needles of the ?rst set complete
cam C1 is located at a point substantially vertically above
their cycle, and further so that the needles of the ?rst
the trailing or lower end 10 of stitch cam S2 and, in order
set commence to move up before the needles of the second
to take full advantage of the invention, such upward cam
curve commences somewhat to the left of the lower end 10
so that the needles controlled by clearing cam C1, of
cylinder cam group 1 commence to rise while the needles
of set 2 (which are controlled by earn group 2) are still
on their way down and have not yet completed the stitch.
Cylinder clearing cam C1 has been shifted to a posi
tion above the release cam R2 and the area within which
the needles of set 2 are being settled, and, consequently,
the needles of set 1 reach their high point (determined
by the peak 11 of clearing cam C1) at about the same time
that the needles of set 2 complete their cycle and pass
set reach the bottom of their movement.
3. In a camming mechanism for a circular knitting
machine employing two sets of needles and having two
groups of cams one for each of said needle sets, the
improvement wherein the cams of one of said groups are
so arranged with respect to the cams of the second group
as to cause the needles of the second set to begin to ex
tend while the needles of the ?rst set are still on the way
in so that the needles of the second set reach their ex
treme outward point approximately as the needles of the
?rst set complete their cycle, and further ‘so that the
point 12 and under the control of guide cam G2 of cam
group 2. Cylinder clearing cam C1 and the needle settling
area of cylinder cam group 2 (cylinder set 2 settling area)
including release cam R2, are in alignment with the dial
clearing cam C1D and the dial needle settling area of
needles of the ?rst set commence to move out before the
dial cam group 2 including the dial release cam R2D, so
and second groups of cams for actuating the needles of
needles of the second set reach their extreme inward posi
tion.
4. In a camming mechanism for a circular knitting
machine employing two sets of needles and having ?rst
that during the clearing of the set 1 cylinder needles, which
are controlled by cylinder cam C1, and during the settling
the respective sets, each of said cam groups including a
clearing cam and a stitch cam, the improvement wherein
the leading ends of the clearing cams of said second cam
of the cylinder needles of set 2 controlled by cylinder cam
group are positioned approximately vertically beneath the
group 2 including release cam R2, the set 1 dial needles
(controlled by the group 1 dial cams) take over and form 40 trailing ends of the stitch cams of said ?rst cam group, and
the leading ends of the clearing cams of said ?rst cam
the corresponding dial stitch.
group are positioned approximately vertically above the
Similarly, cylinder clearing cam C2 has been shifted to
respective trailing ends of the stitch cams of said second
the left and its leading or lower end 13 (FIG. 2) is sub
cam group.
stantially vertically below the trailing or lower end 14
5. In a camming mechanism for a circular knitting
of stitch cam S1, and is to the left of the lower end 14 4.5
machine employing two sets of needles and having ?rst
when full advantage of the invention is taken. This
and second groups of cams for actuating the needles
results in the needles of cylinder set 2 commencing to
of the respective sets, each of said cam groups including
move upwardly before the needles of set I reach the
a clearing cam and a stitch cam, the improvement wherein
bottom of their movement (lower end 14) that is, some
what before they have completed the stitch. Likewise the 50 the leading ends of the clearing cams of said second cam
group are positioned approximately vertically beneath
needles of set 2 reach their high point (determined by the
and slightly in advance of the trailing ends of the stitch
peak 15 of cam C2) at about the same time that the
cams of said ?rst cam group, and the leading ends of the
needles of set 1 complete their cycle and pass point 16
clearing cams of said ?rst cam group are positioned ap
and under the control of guide cam G1.
As shown in FIG. 1, the arrangement of the dial cams 55 proximately vertically above and slightly in advance of
the respective trailing ends of the stitch cams of said
does not differ greatly. That is to say, the leading or left
second cam group.
end 9D of dial clearing cam C1D is in advance of (to
6. In a camming mechanism for a circular knitting ma
the left of) the upper or inner end 10D of stitch cam
chine employing two sets of needles and having ?rst and
S2D, so that the set 1 dial needles which are under the
control of the dial cam group 1 begin to be extended be 60 second groups of cams for actuating the needles of the
respective sets, each of said cam groups including a clear
fore the stitch cam S2D of cam dial group'Z actuates the
ing cam, a stitch cam, and a guide cam, the improvement
needles of dial set 2 to complete their stitches. Also the
wherein the peaks of the clearing cams of said ?rst cam
leading or left end 13D of dial clearing cam C2D is in
group are positioned approximately in alignment with
advance of the inner or upper end 11D of stitch cam SID
so that the dial needles of set 1 that are controlled by the 65 the leading ends of the guide cams of said second cam
group, and the peaks of the clearing cams of the second
cams of dial cam group 1 begin to be extended before the
cam group are approximately in alignment with the leading
stitch cam 81B of dial cam group 1 causes the dial
ends of the guide cams of said ?rst cam group.
needles of set 1 to complete their stitches.
7. In a camming mechanism for a circular knitting
I claim:
1. In a camming mechanism for a circular knitting 70 machine employing two sets of needles and having ?rst
machine employing two sets of needles and having two
and second groups of cams for actuating the needles of
groups of cams one for each of said needle sets, the im
the respective sets, each of said cam groups comprising
provement wherein the cams of one of said groups are
a clearing cam, a stitch cam, and a needle settling area
so alranged with respect to the cams of the second group
including a release cam, the improvement wherein the
as to cause the needles of the second set to begin their 75 clearing cams of said ?rst cam group are positioned ap
3,026,695
6
5
proximately in alignment with the respective release cams
and settling areas of said second cam group, and the clear
ing cams of said second cam group are positioned approxi
mately in alignment with the respective release cams and
settling ‘areas of said ?rst cam group.
References Cited in the ?le of this patent
UNITED STATES PATENTS
646,474
1,000,837
1,083,564
Steber ______________ __ Apr. 3, 1900
Morley _____________ _._ Aug. 15, 1911 10
Scott _______________ _._ Jan. 6, 1914
1,094,482
1,200,451
1,236,189
1,278,634
1,507,147
2,391,665
2,617,282
2,696,720
Scott _______________ .._ Apr.
Ballard
_____________ __ Oct.
28, 1914
10, 1916
Aug .
7, 1917
Glenn ______________ -_ Sept.
10, 1918
2, 1924
25, 1945
Lornax _____________ __
Barth
______________ __
Sept.
Wildt et a1. __________ __ Dec.
Reichert _____________ __ Nov .
Miller _______________ .._ Dec .
11, 1952
14, 1954
FOREIGN PATENTS
308,421
Great Britain ________ __ Mar.
28, 1929
UNITED STATES ‘PATENT OFFICE
CERTIFICATE 'OF CORRECTION
Patent No. 3,026,695
March 27, 1962
Morris Philip
It is hereby certified that error appears in the above numbered pat
ent requiring correction and that. the said Letters Patent should read as
corrected below.
Column 2,
line 39, for "arm" read —— cam ——.
‘Signed and sealed this 10th day of July 1962.
(SEAL)
Attest:
ERNEST w. SWIDER
Attesting Officer
DAVID L- LADD
Commissioner of Patents
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