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Патент USA US2129103

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' Sept. 6, 1938.
2,129,103
P. SANDER
CIRCULAR KNITTING MACHINE
Filed March 31, 1956
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Sept. 6, 1938.
P, SANDER
CIRCULAR
KNITTING
2,129,103
MACHINE
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Filed March 31, 1936
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2,129,103
Patented Sept. 6, 1938
_ UNITED V STATES
PATENT OFFlCE
2,129,103
CIRCULAR KNITTING MACHINE
Paul Sander, Chemnitz, Germany, assignor to the
?rm Chemnitzer Strickmaschinen-Fabrik Akt.
Ges., Chemnitz, Germany
Application March 31, 1936, Serial No. 71,817
In Germany August 10, 1934
5 Claims.
My invention relates to improvements in circu
lar knitting machines for the automatic produc
tion of knitted hosiery with change-over from 1: 1
rib to 2:2 rib and back to 1:1 rib, or the like.
It is the main purpose of my invention, to pro
duce automatically circular knitting hosiery of a
high solidity and elasticity as it is characteristic
for knitting goods of the 1:1 and 2:2 rib art.
With the hitherto known arrangements of this
kind, it was only possible on circular knitting
machines to prepare knitted articles in 2 and‘ 2
character, e. g., 2:1, 3:1 goods, whereby any nee
dle not working, covered over the stitch loop,
formed by the needles located to the right and to
' the left, on the associated rib needle. Special ma
chines‘ for the production of socks, in which a
change-over in both directions takes place, are
in themselves known. The construction of these
special machines cannot, however, be‘ incorpo
rated in machines with large diameters.
Furthermore, structures are also known in
whichrthe/“needles ofboth needle beds can be
out of their radial plane and de?ected lat
erally. In such machines supplementary nee
dles are provided'in addition to the two needle
beds. ' The construction and , working of vsuch
machines is very complicated, so that its output
is considerably impaired.
By my invention, it is possible to produce au
tomatically on an ordinary circular knitting
machine provided with a cylinder, a dial and latch
needles, knitted hosiery with change—over_ from
1:1 rib to 2:2 rib and back to 1:1 rib or the like,
and it is possible to work patterns with each nee
dle both of the cylinder and of the dial. This is
attained according to the invention by arranging
both in said cylinder and said dial latch needles
provided with means for selectively transferring
stitches from each needle to a cc-acting needle
0 of the opposite group of needles on said cylinder
or said dial respectively.
In order to permit the optional tickling off of
each stitch of each needle, according to the in
vention, I arrange these latch needles which on
5 the shank are-,?tted with means for the opening
' of the stitches ‘to be transferred or tickled off and
for releasing or liberating the taking-up needle,
in such manner that the passage of the co-op
crating needles can be effected without altering
0 the distance between the needle. To this end,
the latch needles of the cylinder and of the dial,
are each provided at the rear of the latch ar
ranged at the head of the needle with a pro
, Jection- or shoulder extending beyond the latch
‘ ‘ carrying or operative edge of the needle, for
(Cl. 66-24)
receiving the upper stitch loop. Moreover these
latch needles are preferably also provided with a
lateral needle shank reinforcement in which ter
minates the free end of a hook or similar member
serving to support the stitch to be transferred or 5
tickled off.
The operative part of ,said hook
member 2|v in width is somewhat smaller than
the width of the corresponding adjacent part of
the needle shank, as best seen on the cylinder
needle in Figures 6 to 9, so that the required 10
widening of the loop or stitch by said parts is
reduced to a minimum. The lateral needleshank
reinforcement and the said member are provided
on the latch needle at a distance not interfering‘
with the free passage of the needle co-‘operating 15
with this needle, the free end of the loosely ‘?exi
ble member terminating in a lateral depression
or recess in the thickened part or reinforcement
of the needle.
As compared with the known devices of this
nature, my latch needle offers the following ad
vantages. In consequence of the lateral rein
forcement or thickening of the needle shaft, the
stitch sliding down is partially widened and the
membcrrterminating in this needle shank thick
ening is .considerably relieved, so that it en
sures absolutely the subsequent full widening of
the stitch. Since the upper end of the loosely
?exible member terminates in a lateral depres
sion or recess of the needle thickening, this end,
even in case of a change of shape of the member,
remains without any injurious‘in?uence on the
stitch loop sliding down on to the needle shank.
Further features and particulars of the inven-'
tion will be clear from the following detailed de
scription in connection with the accompanying
drawings, showing an exempli?cation of the in
vention at a circular knitting machine. In the
drawings, which has been restricted to those parts
which are important for illustrating the inven
tion:
Fig. 1 is a section through the cylinder and the
dial of a circular knitting machine.
Fig. 2 is an elevation of the cylinder cam ac
cording to arrow “A” of Fig. 1,
45
Fig. 3 is a plan view of Fig. 1,
Fig. 4 shows the position of the needles for 1:1
rib goods, in one plane,
’ '
Fig. 5 shows the needle position for 2:2 rib
goods,
Figs. 6 to 9 show the different needle positions
-for tickling off or transferring the stitches from
rib or dial needles to cylinder needle.
In the drawings, I indicates the needle cylinder,
2 the cylinder needles, 3 the drivers, 4 the jac-.
50
2
2,129,103 '
quard device, 5 to 9 the cylinder cam parts, 10
the dial, ii the dial needles, l2 the drivers, I3
the pattern wheel, 14 to H the dial cam parts, of
a circular knitting machine. As shown in Fig
In this way, the cylinder needle 2 which remains
ures 4 and 5 the needles of the two sets are dis
placed relative to one another.
The needles 2 and II are each formed at the
be transferred in the same manner ‘from the
rear of the latch with a shoulder or projection l8
extending beyond the latch carrying or operative
10 edge of the needles, and with a lateral needle
shank reinforcement IS. The latter has a lateral
depression or recess 20 in which terminates the
loose ?exible end of a member 2| ?xed on the
needle shank. The members 2! are smaller than
15 the adjacent part of the shank ii and so con
structed that the adjacent needle of the op
positely located row, on the corresponding for
ward movement of the needles, comes between
needle shank and transmission member so as to
20 take up the stitch which is on this needle. The
lateral reinforcement l9 of the needle shank
also serves 'for widening the stitch to be tickled
oil‘, in order to relieve the spring member 2| ter
minating in the depression 20. At the same time,
25 the end of the member 2| is protected in such
manner by the depression 20 that even on any
change of shape of this member 2|, its forward
end always lies in the depression 20 and thus no
injurious in?uence can be exerted by it on the 4
30 stitch sliding over it. The stitch transferring
means on the needles of each set including the
resilient member 2| project in opposite ‘directions
into the spaces between the adjacent needles of
in its position, can easily slide, out of the needle
I I, together with the transferredstitch' 25.
As will be readily understood, the stitches can
cylinder needle on to the; dial needles (Fig. 5'),
and those cylinder or dial needles ‘which transfer
their stitchesv to the oppositely located dial or
cylinder needle respectively, can be selectively de
termined by the v'usual jacquard device 4 or the 10
pattern mechanism i3.
I claim:
'
.
‘
1. In a circular knittingmachine, a cylinder
and a dial, two sets of latch needles of which
one is on said cylinder and the other on said dial,
it
each comprising a needle head, a latch and stitch
transferring means including a- projection at the
rear of said latch and a hook-shaped member pro
jecting laterally from the needle shank, the free
end of said hook-shaped member directed to
wards the needle head being resilient and re
movably engaging a recess in said needle shank,
both sets of needles being displaced relative to
one another so that the distance between the axis
of each needle shank of one set and that of each
corresponding needle shank of the other set is
equal to one half the distance between the axes
of adjacent needles in each set.»
'
2. In a circular knitting machine for the auto—
matic production of knitting hosiery with change
over from1:1 to 2:2 rib and back to 1:1 rib or the
like, a cylinder, a dial, two sets of latch needles
of'which' one set is on said cylinder and the other
the corresponding set. As seen from Figures 4 _ on said dial, said two sets being displaced rela
35 and 5 both sets of needles are displaced relative tlve to another, a distance equal to one half the
to one another so that the distance between the distance between‘ adjoining needles in each set
longitudinal axes of each needle shank of one and stitch transferring means on each needle of
set and that of each corresponding needle shank the two sets, extending laterally in opposite direcof the other set is equal to one half the distance tions into the spaces between adjacent needles
40 between the axes of adjacent needles in each set. of their respective sets.
7
The stitches are now tickled off or transferred
3. In a circular knitting machine according to
from a rib needle II on to, the opposite cylinder claim 2 in which said stitch transferring means-,5.
needle 2 in the following manner:
‘
on each needle comprise a rigid stitch opening or
By means of a known pattern wheel l3, those widening element and a resilient stitch- receiving
45 rib needles Ii are fed to the driving out part or supporting member, the free end of said mem
(id) of the cam, the stitches of which must be ber removably engaging a recess in said- stitch
tickled off or transferred on to the oppositely -
opening element.
located cylinder needles 2.
Fig. 5 shows the initial position of such astitch
4. In a circular knitting machine according to
claim 2 in which each stitch transferring means
50 operation or transfer.
The rib needle ll is-in
the course‘ of beingdriven out, the stitch (Fig. 'l)
sliding over the lateral reinforcement l9 and over
the ?exible element 2! as far‘as the projection l8.
The cylinder needle 2 now commences to be driven
55 up, and retains the lower stitch loop 23 by its
head 22 (Fig. '7).
.
The rib needle 'II is then wholly driven out
until the projection l8 lifts the upper stitch loop
24 so far from the lower loop that the cylinder
60 needle 2'can safely slide through in the direction
of the arrow (Fig. 8).
Now the stitch 25 is taken off from the rib
needle II and transferred to the cylinder needle
2 whilst the needle ll slides back in its channel,
65 the needle 2 taking off the complete stitch 25
from the member 2i. This is made possible by
opening the member 2| by means of the cylinder
needle 2, when pulling back the needle I I, the for
ward end of the member 2| being located loosely
70 ?exible in the lateral recess 20 of the needle ii. '
_
'
u
includes a laterally projecting rigid stitch open
ing or widening element and a resilient stitch
supporting element whose free end removably en
gages a recess in said stitch opening element,
said resilient element being spaced from its rc—
spective needle shank 'a distance larger than one
half the distance between two adjoining needles
in each set to receive between- itself and said
shank the corresponding needle of the opposite
set for the transfer of the stitch thereto and on
the retraction of its respective needle being caused
to disengage said recess and release said needle
of the opposite set.
I
.
_5. In a circular knitting machine according to
claim 1 in which said hook shaped member of
each needle in width is smaller than the width
of the corresponding adjacent part of the needle
shank, so that the required amount of widening
of the loop or stitch therebyis limited- to a mini
mum.
‘
.
PAUL. SANDER.
1o
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