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Патент USA US2127178

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Aug. 16, 1938.
R. H. LAWSON
2,127,178
'
KNITTING MACHINE
' Original Filed Oct. 25, 1933
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Aug. 16, 1938.
2,127,178
R. H. LAWSON
KNITTING MACHINE
Original Filed Oct. 25, 1933
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Aug. 16, 1938.
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R. H. LAWSON
2,127,178
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KNITTING MACHINE
Original Filed Oct. 25, 1953
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Patented Aug. 16, 1938
2,127,178
UNITED STATES PATENT OFFICE
2,127,178
KNITTING MACHINE
Robert H. Lawson, Pawtucket, R. I., assignor to
Hemphill Company, Central Falls, R. I., a cor
poration of Massachusetts
Application October 25, 1933, Serial No. 695,154
Renewed September 16, 1936
17 Claims. (01. 66-48)
This invention relates to knitting machines respective needles as by means of spring bands 5.
and processes and particularly to circular knit
The jacks 4 are also provided with butts 6 and
ting machines of the type disclosed in the patent at their upper ends pass upwardly through a
to Hemphill 933,433, September '7, 1909, latch sinker head 1 connected to the needle cylinder
needles being, preferably, used and without a so
and adapted to rotate therewith if the needle i)
called latch ring for holding the needle latches cylinder is rotated with respect to the knitting
in an open position.
cams. Surmounting the sinker head 1 but pre
In the drawings:
vented from rotating therewith, is a sinker cap
Fig. 1 is a view in section showing a needle par— 8 having cams (not shown) for acting upon butts
tially elevated with the last drawn loop holding 9 of sinkers l0.
10
the needle latch in an open position;
Ordinarily a so-called latch ring is utilized to
Fig. 2 is a similar View but showing the needle maintain the latches l I of the needles in an open
in an elevated position where the loop is below position, the last drawn thread loops being posi
the needle latch;
tioned below the needle latches by elevation of
Fig. 3 is also a sectional view showing the the needles 2 preparatory to reciprocatory knit
needle in its lowermost, stitch drawing position, ting. By means of the instrumentalities and
the old loop or stitch being shown in a position parts cooperating therewith as hereinafter to be
to be knocked over the top of the needle hook more speci?cally described, the necessity for a
by the adjacent sinker;
'
latch ring is obviated, the needles 2 not being
Fig. 4 shows the instep raising cam having ele
elevated to a latch clearing position preparatory 20
vated a jack to the instep level, the needle to reciprocatory knitting.
.
remaining in a relatively lowered position in
In Fig. 1 the latch H is shown as being held in
which the last drawn loop prevents the closing of an open position by means of a bight ll! of the
the latch either during reciprocatory knitting or last drawn loop of thread; in Fig. 2 the needle
upon the resumption of circular knitting; .
Fig. 5 is a View similar to Fig. 4 but showing a
pick elevating a short butt jack companion to a
heel and toe needle;
‘
Fig. 6 is a view similar to Figs.
3O showing an instep cam in position
the long butt jacks and also some
butt jacks if they are not lowered
manner by picks;
4 and 5 but
for lowering
of the short
in the usual
I
Fig. 7 is a fragmentary diagrammatic view
showing the respective paths of the needle butts
and jack butts during normal or circular
knitting;
Fig. 8 is a fragmentary view showing the inac
tive path of the needle’butts during reciproca
40 tory knitting and showing instep and/or other
jack butts being elevated to a non-knitting level;
is shown as having been elevated to a latch clear
ing position, the bight l2 being shown as below
the latch H and a strand l3 of the thread being
shown as about to be engaged by the hook of the
needle; in Fig. 3 the needle is shown in its ex
treme lower, stitch drawing position in which
position the strand i3 is shown as having been
drawn through the bight l2 of the thread, the
said bight being in a position to be knocked over
the top of the needle by a forward movement to
be subsequently imparted to the sinker I0 by a
cam acting upon its butt v9. The movements just
described are imparted to the needle 2 by means
of a jack 4, a cam M by acting upon the jack
butt 6 raising the jack and consequently the com
panion needle to the position shown in Fig. 2,
and cams I 5 and I6 immediately thereafter mov
.Fig. 9 is a fragmentary view showing upper and ‘ing the needle to the position shown in Fig. 3.
The cams l4, l5 and E6, in addition to the func
by a pick to the upper level and the following tions just described, serve also as a means for
45 needles passing along the lower level; and
maintaining the interengaging formations on
Fig. 10 is a view similar to Fig. 8 but showing the needles and jacks in engagement while the
the long and in some cases some of the short butt butts are being engaged by an upper or face of
jacks being relowered to an operative level.
such cams. As shown in Fig. 2 the face of the
Although not essential to the invention the cams I 4, I5 and I6 adjacent to the jacks 4 per
50 needle bed i is indicated as in the form of 2. cyl
form the additional function. The operative
inder within slots of which needles 2 having butts connections whereby movement imparted to a
3 are adapted to slide. The sliding movements jack 4 will move its companion needle 2 either
of the needles are effected by companion jacks 4' to an upper position such as shown in Fig. 2 or
which .also slide within the needle slots and re
to a lowered position as shown in Fig. 3, consist
55 main in contact with the outer edges of their of a bevel-sided recess I‘! on one edge or face of 55
lower paths, the leading jack butt being elevated
2
2,127,178
or edge 33 of the bracket 30 when the needles
move to the right, Fig. 9.
either the needle or jack and a correspondingly
shaped lug or projection [8 on the adjacent face
of the other instrumentality, e. g. needle or jack.
Obviously, the cam l4 and springs 5 maintain the
It will be evident from the foregoing descrip
tion that by not raising the needles preparatory
to and during reciprocatory knitting to the‘ usual
jacks and needles in the operative position shown
in Figs. 1, 2 and 3 and when in such position
movements imparted to the jack butts 6 cause
elevated position, the last drawn bights of thread
remain in contact with the open needle latches
and prevent their closing, thus avoiding the
~ the companion needles either to be elevated to
the position shown in Fig. 2 or to be lowered to
the position shown in Fig. 3. The lower camv l9
upon which the butts 3 of the needles ride has
no effect upon the vertical movements of the
needles except as at 20 where the said needle
butts are engaged and the needles elevated.
15 It is evident that the jacks 4 bear against the
outer face of the needles 2 at points closely adja
cent the ends of each needle. The springs 5
,
necessity for using a latch ring for this purpose
and in conjunction therewith a gap closer adja
cent to the usual mouthpiece.
The invention although of particular value in
conjunction with reciprocatory knitting, such as
heel and toe or split-foot knitting, is not neces
sarily and in all respects so limited.
Omission of the latch ring is particularly ad
.
restraining jacks from coming out of their slots
will also press the needles inwardly against the
20 back of the slots, this pressure being exerted at
points closely adjacent the ends of the needle.
Needles: will be maintained in better alignment
due to this construction and this alignment will
be maintained even though cams tend to rock
the jacks within their slots.
Ordinarily during heel and toe or other recip
rocatory. knitting the long butt instep needles are
raised to. the so-called instep level where the last
drawn stitches are below the open needle latches,
30 and as a consequence thereof a latch ring must be
provided to prevent the closing of the latches of
the idle, instep needles. In the present instance
and as shown in Fig. 4 the instep needles are not
elevated but their butts 3 move along the straight
line indicated by the dot and dash lines 2|, Figs.
8, 9 and 10. In this position the needle latches
II are maintained in their open position by the
last drawn loops 22.
Preparatory to heel or toe or other reciproca
tory knitting'an instep cam 23 engages the long
butts 6 of the jacks 4 and elevates the same to
travel along the path 24 which is above the cen
ter cam [5, the said jacks remaining in such ele
vated position until they are again lowered by
the other instep cam 25 prior'to resumption of
circular knitting, the butts 6 of the jacks being
then engaged by the cam 25 and moving down to
they lower level of the dot and dash lines 26.
When the long jack butts 6 are engaged by the
instep cam 23, the butts 3 of the needles are en
gaged by a cam or rib 21 integral with cam 23,
the needles thereby being held down while the
jacks are disconnected therefrom and moved to
the position shown in Fig. 4, the tails 28 of the
jacks moving from a position in contact with the
upper edges of the butts 3. Likewise the earns
21' retain the needles in the position shown in
Fig. 5 while the picks 29 operate to elevate the
short butt jacks to the instep level. At each half
60 reciprocation of the needles during reciprocatory
knitting, if the needles reciprocate, the short jack
butts 6 are engaged by a narrowing pick 29 and
elevated to join the long butts of the jacks 4
where they remain until they are picked down
to an operative level by widening picks (not
shown), the action of the narrowing and widen
ing picks upon the short butts of the jacks 4
being substantially the same as the action of the
usual narrowing and widening picks upon short
butts of needles. The picks 29 are guided in their
movements by brackets such as bracket 38 which
has a bayonet slot 3| therein, a pick 29 elevating
the leading needle by riding up the inclined face
or edge 32 of the pick bracket 30 when narrow
7-5 ing and being caused to move up the inclined face
15
vantageous when knitting wrap stripes in a man
ner similar to that disclosed in the patent to
Lawson 1,702,608, February 20, 1929, the absence
of a latch ring in such machines facilitating the 20
needle wrapping.
I claim:
1. A circular knitting machine of the inde
pendent needle type having a cylinder adapted
to rotate and reciprocate, needles and jacks 25
mounted to slide within slots of the needle cyl
inder, the jacks being companion to the needles
and in contact with the outer edges thereof, in
terlocking formations on the needles and com
panion jacks, in combination with cam means 30
for actuating the jacks and thereby their com
panion needles when the latter are knitting, the
interlocking connections between the needles and
jacks permitting the jacks to move independently
of the needles so that such needles do not knit ,
but remain in such a position that the last drawn
loops prevent the closing of the needle latches.
2. An independent" circular knitting machine
having a needle cylinder adapted to rotate during
the knitting of circular work and to reciprocate 40
as during the knitting of heels and toes of stock
ings, latch needles in the needle cylinder and
means for rendering some of the needles inactive
and thereafter adding needles to the inactive
needles, the needles when inactive being at such
a level that the last knitted stitches rest on the
needle latches.
3. A needle and jack assembly for a knitting
machine, the needle and jack each having later
ally projecting butts and interlocking formations 50
to permit the needle to move with the jack or to
permit relative movements of the needle and
jack, in combination with cam means so operat
ing upon the needle and jack butts as to elevate
the jacks only to inactive‘ position preparatory to
reciprocatory knitting.
4. A knitting machine having needles inde
pendently mounted therein, jacks connected to
some at least of the needles and having butts
thereon, butts on the needles, interlocking con 60
nectionsv between the jacks
and companion
needles, a cam for acting upon the butts on the
jacks to move them lengthwise to separate the
jacks from their needles as preparatory to re
ciprocatory knitting.
65
5. A knitting machine having needles inde
pendently mounted therein and jacks companion
to the needles, interlocking ‘connections between
the jacks and needles, the construction being 70
such that movements imparted either to the
needles or jacks are normally communicated to
the other, a cam for operating upon the butts on
the jacks and another cam for coincidentally act
ing upon the butts on the needles to break the 75
2,127,178
interlocking connection and thus permit the
needles to remain inactive.
6. A knitting machine having needles inde
pendently mounted therein, jacks companion to
01 the needles and having butts thereon, the jacks
taining said connections in engagement while
earns.
12. In a knitting machine, needles and jacks,
releasable and interengaging formations between
and companion needles being detachably con
all the needles and jacks and a cam pressing
against the jacks adjacent their needle engaging
portions, so that at certain positions about the
temporarily inoperative.
'7. A knitting machine having needles and jacks
15 independently mounted therein, butts on the
needles and jacks and cam means acting upon
the butts on needles and jacks for causing a rel
ative movement between the needles and jacks to
effect an interlocking engagement between such
20 needles and jacks after the interlocking engage
ment has been broken.
8. A knitting machine having needles inde
pendently mounted therein, a jack associated
with each needle some of the jacks having short
25 butts and the remaining jacks having relatively
long butts, interlocking connections between the
needles and companion jacks, cam means acting
upon the butts on the jacks to impart knitting
movements to the companion needles, an instep
cam for acting upon the long butt jacks to sepa
rate the said jacks from their companion needles
preparatory to reciprocatory knitting, and picks
progressively acting upon some of the short butts
on the jacks to separate the said jacks from their
companion needles during reciprocatory knitting.
9. In a knitting machine, a needle and jack as
sembly characterized by interlocking formations
at one position only on both the needle and jack,
the formations each having a beveled edge where
40 by one of the elements may be detached from
the other, a butt on the jack and another butt
on the needle and cams for engagement with
said butts, and means for maintaining said for
mation in interlocking engagement while said
45 cams are acting upon said butts.
10. A knitting machine having needles inde
pendently mounted therein, jacks individual to
each needle and each jack arranged in the same
slot with and in front of its needle and each jack
50 being movable longitudinally with or independ
ently of its needle, said jacks being provided with
needle contacting projections at either end, and
resilient means for urging the jacks inwardly of
the slots whereby each needle will be retained
55 against the back of its slot by pressure adjacent
,
said butts are engaged by one at least of said
nected in such a manner that at times in the
knitting cycle the needles and jacks move to
gether, in combination with picks acting upon
certain ones of the jack butts to effect a separa
tion between the jacks and companion needles so
that the picking of the jacks renders the needles
35
3
machine each jack and needle must move to~
gether and at other positions movement im 10
parted to a jack will separate it from its needle.
13. A knitting machine having therein needles
and jacks, cams for imparting movements to the
jacks, releasable and interengaging formations
between each needle and jack so constructed that 15
if maintained in engaging relationship the jack
and needle will move as a unit but if not, the jack
will be separate from its needle, and means act
ing upon the jacks to maintain each jack and
needle in engagement.
20
14. A knitting machine having needles inde
pendently mounted therein, jacks individual to
each needle and each jack arranged in the same
slot with and in front of its needle and each jack
being movable longitudinally with or independ 25
ently of its needle, each jack being provided with
a needle contacting projection, and resilient
means for urging the jacks inwardly of the slots
whereby each needle will be retained against the
back of its slot.
30
15. A knitting machine having needles inde
pendently mounted therein, jacks individual to
each needle and each jack arranged in the same
slot with and in front of its needle and each jack
being movable longitudinally with or independ 35
ently of its needle, each jack being slidable and
provided with needle contacting projections at
either end, and resilient means for urging the
jacks inwardly of the slots whereby each needle
will be retained against the back of its slot by 40
pressure adjacent its extreme ends.
16. A knitting machine having needles inde
pendently mounted therein, jacks individual to
each needle and each jack arranged in the same
slot with and in front of its needle and each jack 45
being movable longitudinally‘ with or independ
ently of its needle, each jack being slidable and
provided with a needle contacting projection, and
resilient means for urging the jacks inwardly of
the slots whereby each needle will be retained
50
against the back of its slot.
17. A knitting machine having a slotted needle
carrier needles and jacks therein, one jack for
each needle and means for resiliently retaining
and jacks, one jack for each needle and means
the needles and jacks within the slots in said car
55
rier, butts on the needles and on the jacks, inter
engaging connections between the jacks and nee
dles and cams for engagement with the butts, and
for resiliently retaining the needles and jacks
means for maintaining said connections in en
its extreme ends.
11. A knitting machine having therein needles
60 within slots in a carrier, butts on the needles
and on the jacks, interengaging connections be
tween the jacks and needles and cams for en
gagement with the butts, and means for main
gagement while said butts are engaged by one, at 60
least, of said cams, said means being a portion of
at least one of said cams.
ROBERT H. LAWSON.
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