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' March 22,1911,
,
F. MElWALD
'
1 2,111,911
YARN KNITTING MACHINE
Filed May 2Q 1956
M94
41-4
s Sheets-Sheet 1
'
arch 22, was.
A
F. MEIWALD
3,111,984
YARN KN ITTING MACHI-NE
Filed May 2, v1956
3 Sheets-Sheet 3
2,111,984
Patented Mar. 22, 1938
‘ UNITED STATES ' PATENT’ OFFICE 5
2,111,984
YARN KNITTING MACHINE
Franz Meiwald,‘ Vienna, Austria, assignor to
\Sinfra. A..G., St. Gallen, Switzerland, a cor;
notation of Switzerland
,
‘
Application May 2, 1936, 'Serial No. 77.586
-
In Austria April 17, 19st
’ 11 Claims.
This invention relates to a new.» and improved
type of yarn knitting machine for the production
of yarn knitted from two or more threads, and
has for its object to simplify the construction and
5 therefore to cheapen the‘ building of such ma
chines, as also to obtain advantages in connection
with the operation of- such machines; ,
The invention will be more’ readily understood
if reference be had to'the accompanying‘ draw
10 ings forming part of this speci?cation, and show
ing, by way of example, a form of construction
embodying the present invention. In these draw
ings:
‘
_
Fig. 1 is a side elevation of the essential part
15 of the machine, shown partlyin section.
Fig. 2 is a front elevation of the same, like
wise partly in section.
.
'
Fig. 3 is a section taken on the line III—IH
of Fig.
1.
'
'
.
-
.
.
20 . Fig. 4, shows th whole machine, in side eleva
tion.
~
'
,
‘
.
Fig. 5 is a diagrammatic representation of the
. arrangement of parts provided for the purpose of
stopping the machine ‘in the event of a thread
25‘breaking, and.
.
'
Fig. 6 is a detail view of a modified thread feed.
r ' Referring to Fig. 4 the framework of the ma
chine consists of two similar trestles I and trans
verse members of U-section 2 to the uppermost
..30 of which, in front, there is screwed by means of
screws 4 the casing 3 of the knitting heed (Fig. 1).
To the rear uppermost U-section transverse mem
1 bet 2 there is similarly secured the holder~5 for
the supply? bobbins 6.‘ On the lower-transverse
.35 member 2 there is mounted ahthread twisting de
vice of conventional design which is denoted in
Fig. 4 by the reference numeral 1. The driving
(01. 66-8)
.
22 pertaining to the knitting head. The shafts
i8 and 22 are supported‘ in the casing 3 and in a
cover 23 of the latter, respectively.
Fast on the shaft 22 there is a cam cylinder‘
24 having in its periphery a cam groove 25 'in
which the feet 26 (Fig. 2) of the needles 21 en-v
gage.
The effective parts of the needles (hook -
and tongue) are inwardly-directed. There are
only two needles used, and they are disposed dia
metrically opposite each other and guided verti 10
cally in needle beds 28. The needle beds 28 are
arranged in the usual manner to be vertically
adjustable and capable of being locked in posi
tion in the casing t. The adjustment of the
needle beds for the purpose of altering the length 15
of the knitted loops is likewise effected in a
known manner, by virtue of the arrangement
that a pin pertaining to a sliding block engages in
an oblique slot in the needle bed, while the said
sliding block is adapted to be displaced by means
of a screw spindle. In Fig. 2 this known arrange
ment is partly indicated, the pin being denoted
by 29, the sliding block by-t?. the screw spindle‘
by 3|, and the knob of the latter by 32.
The bearing member it is provided with a
super-structure 33 to which there is attached a 5
length of ?at section iron 34 (Figs. 1 and 2)‘
which carries two brackets 35, 36 for the supporting of a shaft 31. Fast on this shaft 31 there is
a. roller 38 above which there is provided a roller
39 which is supported on one side in abearing 0
upright" 40 extending upwards from the bracket
38. The supporting of the roller 39 is effected
with the‘aid of a shaft ‘4|, which is pivotable
about a pin 42 pertaining to the upright 40, so that 5
the roller 39' can be lifted.
The bracket 36 is '
provided with two stay-bolts 43 over which the .
four threads 44 coming from the supply bobbins,
desired manner, is denoted by 8. From this pulley » and disposed "one behind the other in Fig. 1, are
a belt 9 leads, over a guide roller II), to a cord taken. These threads then travel between the 40 .
r
I
.l pulley II which is loosely mounted on the main rollers 38, 39. '
To the driving shaft I! there is secured, with-,
driving shaft l2-of-the knitting head (Fig. 1).
The cord pulley ll constitutes the one part of in the'casin'g It, a bevel gear‘wheel 45 which
a friction clutch theother, axially displaceable, meshes with a bevel gear 46 attached, within the
part of which consists of a second cord pulley l3 casing It, to a shaft" to which there is secured,
which, by means of a belt l4, drives the twisting ' outside the casing 3,a gear wheel 48 which meshes '
' pulley, which may be driven by a motor in any
device ‘I through the intermediary of a pulley
l5. On the casing 3 there is mounted a bearing
member l6 serving to support the driving shaft
; II. To this latter there‘ is keyed, outside the bear
ing‘member IS, a bevel gear I‘! which meshes‘
with a gear wheel 49 fast on a shaft 50 supported
The gear wheel 49
4 in a cover-shaped casing 5|.
forms a friction wheel 52 which co-acts, through»
an ‘intermediate wheel 53, with a friction wheel 54 _
'_ .with a beveligear l9 that is fast on an inter
mediate shaft l8. - The bevel gear wheel I9 is
which is fast on the shaft 31." The intermediate
wheel 53 is idly rotatable on the smooth free end
of a screw spindle 55 which is screwed into a sleeve
rigidly coupled to a spur wheel 20 which in its
.56 rotatably mounted in a bearing 51 secured to
.55 turn meshes with a spur wheel 2| on the shaft I a pin 58Ip'rojecting from the casing 16.
The 55
aliases
intermediate wheel tilt is prevented from moving
longitudinally on the spindle 55. The parts 56,
55, '53 are guided by means of a fork E59 which
embraces the shaft til and is loosely mounted on
the intermediate wheel 53. For the purpose of
adjusting or shifting the spindle fit a knob tilt
is provided on its lower end which projects from
the bearing 5?.
'
To the cover-like casing 55 there is secured for
each of the four threads a wire spring (it the
end of which is formed into an eyelet for the
passage of the thread. The cover 23 is provided
with a sleeve 62 in which there is firmly seated
a bearing housing (53 which accommodates dear
15 ing for the operation of the thread guides.
The
mounted rollers til! which bear against the roll~
ers 9B in response to the action of a weight 99
suspended on a ?exible tension member Q8. The
shaft 9d is ?tted with a. cord pulley I00 which
drives, through the intermediary of a cord IM and
a further cord pulley I02, a shaft me. This
shaft ltd is mounted in a bearing member "it
which is adapted to be slid and locked in any
desired position on the stay-bolts W.
The shaft
tilt is provided midway with a worm Hi5 which 10
engages in a worm wheel I06 attached to a cross
threaded spindle Bill supported at one endin the
bearing member me. In this bearing member
there are further mounted two stay-bolts N18 to
which winding bobbins H09 may be ?tted. The
stay-bolts Hid are ?tted with friction wheels till
which are adapted to be driven by friction wheels
housing 63 is adapwd to be locked by means of a
set-screw B2’ in any position to which it may be
Mi on the shaft “it. On the cross-threaded
vertically adjusted in the sleeve $2. The shaft 22
of the knitting head is passed through the sleeve spindle till there is adapted to travel a sliding 20
block M2 which can be moved to and’ fro in a
20 62 and the housing 63, and is ?tted with a knob
64% at its upper end. To the shaft 22 there is known manner on rotation of the spindle, by
keyed a gear wheel 65 (Figs. 1 to 3) which meshes virtue of its engagement in the grooving of the
with two diametrically opposed gear wheels tit, , spindle. To the sliding block H2 there are se
66' (Fig. 3) which are rigidly coupled to smaller cured bifurcated thread guides H3 which partly 25
embrace the winding bobbins I09, and which ex
25 gear wheels El, 61’ which are disposed there
tend to both sides of the block H2 and spindle
beneath and which mesh with gear wheels d8, 68'
The gear wheels dd, 66', and til, 6%’ are supported ltl. In Fig. 2 the two prongs of each of these
in the housing fit. The axles On. which these thread guides coincide, so that they are seen as
wheels rotate are formed of tubes 6% through one.
The drive of the parts of the machine for which 30
30 which the four threads coming from the~eyelets
the
drive is taken from the pulley B is through
on the wire springs ti pass. Each of the gears
6F, 51', and til, 68' is provided with a thread the train comprising the cord pulley H and the
guide ‘it, and in the position of the parts shown clutchpart [[3, driving shaft I2, and gear wheels
ii, iii, and ii, to the shaft 22 of the knitting
in Figs. 2 and 3 the two guides of each adjacent
head,
with the result that at each revolution of 35
35 pair point in opposite directions. To the hous
the
cam
cylinder 2d the needles are raised and
ing 63 there are secured forks “ii of wire which
embracethe wire springs iii and hold these latter lowered twice. Through the train of gears 135, 46,
£38, £39, and the friction gearing 52, 53, and 5d the
fast against lateral displacement.
shaft 37!, and with it the thread feeding means
Within the cover-like casing 5i’ there is at
tached to the shaft ‘5d a plate l2 having two wings (rollers it and 39) , are driven. The drive for the 40
(Figs. 1 and 5). In the bearing member it withdrawing means (rollers 9! ill, on the shaft
there is provided a pin ‘it which is disposed W) is taken from the shaft 31 by means of the
parallel to the shaft 59,. and on which there is chain drive comprising the elements 9d, 93, and
pivotally mounted a stirrup-shaped member ‘M. Q2. The rotation of the shaft til is transmitted,
through the cord drive I00, ml, M2, to the shaft
45 The pin ‘it is provided with an arm. '35 which
503, and. consequently to the cross-threaded
engages a shoulder it on a disc ll secured to a
shaft 18 mounted in the casing it. The shaft spindle Hill and to the winding bobbins Hi9.
As can be seen from Fig; 1, the four threads
18 is stressed by a torsional spring ‘it which con
M are withdrawn from the supply bobbins 6 by
stantly strives to turn this shaft in the direc
the conveyor rolls 38, 39, and travel through
50 tion indicated by the arrow in Fig. 5, it being
the eyelets of ‘the wire springs 6!, the tubes 69,
prevented however from doing so by the engage
ment of the arm '55 against the shoulder ‘it on and the eyelets of the thread guides l0, which
the disc ‘ill. The shaft “it is provided at one end feed the threads in pairs to the two needles in
‘ with an arm Ml which, on rotation of the shaft,
the following manner. To each needle there are
55 can bear against an inclined surface iii (Fig. 1)
on the movable part it of the friction clutch, and
fed two threads, the ?rst at the ?rst raising of
the needle, and the second at the second raising
displace the clutch member against the action
of a plate spring 1%. The cover-like casing iii
is provided, in pivoted bearings $2, with four
cylinder M. This purpose is served more par
ticularly by the position of the thread guides
60 sleeves iii in which there are slidably mounted
wire members 8d of theupper ends of which are
bent or doubled over to form hooks $5 with which
the wire members are freely suspended on the
threads ‘it. The lower ends of the wire mem
65 bers M are thickened by being repeatedly folded
on themselves.
'
To the housing 3 there are secured two down
wardly extending stay-bolts d7! on which there is
arranged to be slid and locked in position a bear
ing member 88 having two arms 89 in which there
is mounted a shaft 96 which is provided at its
free ends with rollers 9|. The shaft 90 is driven
of the needle during one revolution of the cam
shown in Fig. 3 which of course only shows one
'of the phases of the constantly changing posi
tion during the cycle of the machine. The knit~
ted yarns produced in this manner are withdrawn
by the withdrawing means 9 I , 91, passing thereby
over the oblique surfaces at the upper end of the
needle beds shown in Fig. 2, and over guide
rollers lid which are mounted on the needle
beds. The entire knitting operation and the
withdrawing of the yarns is visible, which con
stitutes a particular advantage of the form of 70
construction according to the invention. From
the withdrawing rollers 9|, 9?! the yarns travel
from the shaft 31 by means of sprocket wheels - on to the winding rolls I09,.for which purpose ' '
94 and 92 and chain 93. On pins 95 on the arms they pass through the bifurcated thread guides
76 89 there are pivoted arms 96 on which there are
H3 and become uniformly wound on the rolls 75
n
2,111,984
109 in consequence of the reciprocating move
ment of the thread guides secured to the sliding
block'l l2.
1.
'
.
,
If it ‘is desired to twist the yarn, the spooling
device is taken off, the belt ll ?tted over the
cord pulleys l3 and i5, and the yarn‘ taken to
the twisting'device ‘I of conventional design.
By means of the friction transmission gearing
52, 53, 54, both the rate of feed‘of the threads
(and with it the length of the loops) and also
the speed of the withdrawing means can be reg
ulated. For this purpose-the spindle 55 is rotated
by means of the knob 60, wherebythe position
of the intermediate wheel 53 relatively’ to the‘
1.5
3
'
said needles for reciprocatingmovements, said
needles being'arranged in a plurality of‘ banks,
a set of revoiuble thread guides supported above
each bank of needles, and drive means driving
said cam cylinder and thread guides. .
2. In a yarn knitting machine, a rotating cam
cylinder having an external cam groove, a mul
tiplicity of needles surrounding said cylinder and
parallel to the axis thereof, feet on said needles
engaging in said groove,‘ guide means to hold 10
said needles for reciprocatingmovements, said
needles being arranged in a'plurality of banks‘,
‘ a set of revoluble thread guides supported above
each bank of needles, the thread guides ‘of each
friction wheels 52 and 54, and therefore also 'set each having a driven gear ?xed thereto, a 15
the speed of rotation of the shafts 31 and 90, driving gear centrally of the gears, of each set
are altered simultaneously.
"In order to alter the vertical adjustment of
the thread guides ‘III to allow for the use of
20 needles of different length, the set-screw 62" is
slackened and tightened up again after altera
tion of the setting of the bearinghousing 63.
On the vbrealdng of a thread the wire member
. 84 suspended therefrom by its hook 85 loses its
25 hold, with the result that it slides down in its
and meshing with the driven gears, and drive
means driving'the cam cylinder and central gears.
8. In a yarn knitting machine, a rotating cam
cylinder having an external cam groove, a multi 20
plicity of needles surrounding said cylinder‘and
parallel to the axis thereof, feet on said needles .
engaging in said groove, guide ‘means to hold said
needles for reciprocating movements, saidneedles
being arranged in a plurality of banks, a set of 25
revoluble thread guides supported above each
bank of needles, the thread guides of each set
each having 'a driven gear ?xed thereto, a driving
‘83 this wire member is then pushed aside by this gear centrally of the gears of each set and mesh
sleeve 83 and comes with its thickened end in
the path of. movement of the plate 12; In con
: sequence of the pivoted mounting of the sleeve
30 plate 12, thereby pivoting the stirrup-shaped
member 14 (Figs. 1 and 5), so that the arm 15
. comes out of engagement with the shoulder 16
and the shaft 18 is rotated in the direction indi
cated‘ by- the arrow in Fig. 5 by the action of
the spring 79, with the result that the arm 80
is pressed against the inclined surface at and
disengages the part l3 of the clutch. Thus on
ing with the driven gears, and drive means driv 30
ing the cam cylinder and central gears, said-drive
means including a shaft whereon said cam cylin
der and driving gear are mounted.
'
.
4; In a yarn>knitting machine, a ‘rotating cam
cylinder having an external cam groove, a multi
plicity of needles surrounding said cylinder and
parallel to the axis thereof, feet on saidneedles
' the breaking of. one of the threads the entire
engaging in said groove,‘ guide means to hold said
machine is stopped. The clutch is of course also
needles for reciprocating movements, said needles
40 capable of being disengaged independently-of the
described automatic stop motion.
Since the knitting head constitutes an inde
being arranged in a plurality of banks, a set of 40
revoluble thread guides supported above each
bank of needles, the thread guides of each set'
vpendent unit or assembly it can also be ?tted to each having a driven gear ?xed thereto‘, a driving
existing thread machines. It will be understood gear centrally of the gears of each set and
that the invention is not restricted to the con ' meshing with the driven gears, drive means driv-v
crete embodiment described and illustrated by ing thecam cylinder and central gears, said drive
way' of example, but can be appropriately modi
means including a shaft whereon. said cam cylin-' ' , fied within the scope and spirit of the invention.
Thus‘ for example in place of two needle beds
50 there could also be provided one-single needle
bed or more than two needle beds. The two
threads fed to one needle may be fed thereto at
di?erent speeds, for which purpose the conveyor
rollers 3t, 39 may either be subdivided, and their
der and driving gear are mounted, and a hand
wheel on the upper end of said shaft.
'
5. In a yarn knitting machine, a rotating cam dd
cylinder having an external cam groove, a multi
plicity of needles surrounding said cylinder and
parallel to the axis thereof, feet, on said needles
engaging in said groove, guide means to hold said
55 parts adapted to be driven at different speeds, ' needles for reciprocating movements, fabric feed-. 55
or made of stepped design with the retention
of a common drive.
As shown in Figure 6, this‘modification may
'comprise a plurality of stepped rolls it’, it’, M3,
and it‘ on the shaft i‘L-which shaft and the
parts it, M, M, M, and 9d are the same as illus
trated in the main views of the drawings. The
stepped rolls 39', M3, M3, and 394 are mounted
65
to idle on the shaft ti and are in mripheral
contact respectively with the rolls 3%’, it“, M3,
and-it“. It therefore follows that the revolutions
caused by the differences in the diameter of the
ing rolls below said cam cylinder for drawing'the
knitted fabric downwardly, a main drive shaft, '
frictional gearing connecting the main drive
shaft with the‘ feed rolls, said frictional gearing
including a driving disk, a driven disk parallel 60
to the driving disk and eccentric thereto, an idler
between said disks, and idler adjusting means to
vary the position of said idler radially with re
spect to said disks.
6. In Pa yarn‘ knitting machine, a rotating cam
cylinder having an external cam groove, a multi
plicity of needles surrounding ‘said cylinder and‘
last ‘mentioned rolls may result in imparting dif
parallel‘ to the axis thereof, feet on said needles
ferent speeds to the threads engaged thereby. . ( engaging-in said groove, guide means to hold said
70
I claim:
needles for reciprocating movements, fabric feed
1. In a yarn knitting machine, a rotating cam ing rolls below said cam cylinder for drawing the
“ cylinder having an external cam groove, a mul->
tiplicity of needles surrounding said cylinder and
parallel to the axis thereof, feet on said needles
75 engaging in said
ve, guide means to hold
knitted fabric downwardly, avmain drive shaft,
pairs of feed rollers for the. several threads con
structed and arranged to feed the several threads
at individual linear speeds, and frictional gearing 75
airmail
plicity of needles surrounding said cylinder and
groove, guide means to hold said needles for re
ciprocating movements, a set of thread guides
situated above each bank of needles, and driving
means to actuate said cam cylinder.
10. In a yarn knitting machine, a rotating cam
parallel to the axis thereof, feet on said needles
engaging in said groove, guide means to hold said
needles for reciprocating movements, fabric feed
plicity of needles surrounding said cylinder ar
ranged in a plurality of banks and parallel to the
connecting the main drive shaft with the feed
rolls.
,
7. ‘In a yarn knitting machine, a rotating cam
cylinder having an external cam groove, a multi
ing rolls below said cam cylinder for drawing the
10 knitted fabric downwardly, a main drive shaft,
stepped thread feed rollers feeding threads" to
said guides, each step of the rollers driving an
individual thread,: and frictional gearing con‘
necting the main drive shaft with the feed rolls.
15'
8. In a yarn knitting machine, a rotating cam
cylinder having an external cam groove, a multi
cylinder having an external cam groove, a multi
axis thereof, feet on said needles engaging in said
groove, means for holding said needles for recip
rocating movements, a set of'thread guides sit
uated above each bank of needles, thread feeding
rolls for controlling the feeding speed of the
thread and the length of the stitches, means for
driving the cam cylinder and feed rolls, and ten
‘sion equalizing devices arranged between said
plicity of needles surrounding said cylinder and ' thread guides and said feed rolls.
parallel to the axis thereof, feet on said needles
engaging in said groove, guide means to hold said
20 needles for reciprocating movements, said needles
being arranged in a plurality of banks, a set of
revoluble thread guides supported above each
bank of needles, drive means driving said cam
cylinder and thread guides, a vertically adjust
25 able casing supporting said thread guides above
said needles, and means securing said casingin
adjusted position.
11. In a yarn knitting machine, a rotating cam
cylinder having an external cam groove, a multi
plicity of needles arranged in a plurality of banks
surrounding said cylinder and parallel to the axis
thereof, feet on said needles engaging in said‘
groove, guide means to hold the needles for re
ciprocating movements, a set of thread guides
situated beyond each bank of needles, thread \
feeding rolls for controlling the feeding speed of
the thread and the length of the stitches, a main
drive shaft for driving the cam cylinder, gearing
9. In a yarn knitting machine, a rotating cam
connecting the mainv drive shaft with the feed
cylinder having an external cam groove, a multi
rolls, and tension equalizing devices arranged be- .
plicity
of
needles
arranged
in
a
plurality
of
banks
_
30
surrounding said cylinder and parallel to the axis tween said thread guides and said feed rolls.
thereof, feet on said needles engaging said cam
FRANZ MEIWALD.
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