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Патент USA US2113053

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April 5, 1938.
v
|_. H. LEEDHAM ET AL
2,113,053
KNITTING MACHINE COMPRISING NEEDLE JACKS
Filed July 15, 1936
‘
2 Sheets-Sheet 1
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April 5, 1938-
-|_. H. LEEDHAM ET AL
2,113,053
KNITTING MACHINE COMPRISING NEEDLE JACKS
Filed July 15, 1956
2 Sheets-Sheet 2
INVENTOR
Patented Apr. 5, 1938
2,113,053
UNITED STATES PATENT OFFICE
2,113,053
KNITTING MACHINE COMPRISING NEEDLE
JACKS
Leedham
and Henry Harold
Leslie Herbert
Holmes, Leicester, England, assignors to Wildt
and Company, Limited, Leicester, England, a
British company
Application July 15, 1936, Serial No. 90,660
In Great Britain August 9, 1935
5 Claims.
invention is not necessarily a jack that acts by
in particular is concerned with the improvement
medium of which the needle is actuated.
5 of the means disclosed in United States Patent
No. 1,722,989. In some circumstances, partic“
ularly in the case in which the butt ends of the
needle jacks are normally sprung away from the
beds of the tricks in which they are situated,
the action of selecting means for the needle jacks
is found to tend to move the upper ends of those
jacks outwardly from the tricks and this move
ment may be transmitted to the needles with
which they are associated, to the detriment of
15 action of the latter. This is especially to be
avoided when the needles are of ?ne gauge.
2O
I
An object of the invention is to avoid this draw
back and accordingly the present invention com
prises the combination of sprung needle-jacks
and substantially rigid means acting on the upper
ends thereof at least during the time at which
movement of the jacks occurs, such means serv
ing to restrain the upper ends of the jacks from
moving outwardly.
25
(Cl. 66-—50)
This invention consists in improvements in or
relating to knitting machines comprising needle
jacks which are associated with the needles and
Preferably, when sprung jacks are employed
the invention comprises the combination of
sprung needle jacks and substantially rigid means
acting on the upper ends thereof at least during
the time at which the lower ends of the jacks are
moved against the action of their springs to pre
vent‘ the upper ends of the jacks from moving
outwardly.
Hitherto, spring bands have been employed at
direct engagement upon a needle as it may be one
of a plurality of jacks through the collective
The invention is equally applicable to the case
of any jack combined-with an instrument other
than a needle, which is employed in a knitting
machine and which may otherwise be dependent
for its functioning, upon the springing or normal
movement of the jack out from its trick.
10
In order that the invention may be more
clearly understood a preferred example will now '
be described with the aid of the accompanying
drawings, in which—
Figure 1 is an elevation partly in section of those portions of a knitting machine necessary
for the understanding of the invention, and
Figure 2 is a section, on the line 2—2 of ‘Fig
ure 1.
I
Like reference numerals indicate like parts in 20
the accompanying drawings.
‘
The invention is illustrated as applied to a cir
cular knitting machine having a needle cylinder
It provided with tricks I l for needles and asso
ciated needle jacks i2, 13. For each needle there
will be a pair of jacks such as l2 and i3 disposed
end on to one another and to their needle. '
Concentric with the axis of the needle cylinder
is a jack presser cam 14 arranged at the upper
ends of the needle jacks I3 with a depth, parallel
with the axis of the machine, sufficient to main—
tain engagement with those upper ends during the
vertical sliding movements of the jacks as they
the necessary restraint for the upper ends of the
are operated to control the needle movements.
The jacks 13 have relatively rigid upper por- ‘
tions and tail portions l30 which are of a resilient
needle jacks.
Preferably, the restraining means employed
by the present invention will be entirely rigid
nature and normally rest in the position illus
trated in Figure 1 where their lower butts [3!
remain in operative relation to a raising and
although when they are described as substan
selecting cam l5.
tially rigid this mrm is employed to include a
construction in which the restraining means may
be somewhat resilient but insu?iciently resilient
to permit any outward movement of the upper
ends of the jacks.
A sprung needle jack is to be understood as a
jack which is either associated with an additional
Between the presser cam M and the needle
cylinder there will be relative rotation about the
axis of the machine and in the present instance
it is the needle cylinder which is to be understood
as rotating in company with a cylinder extension 45
I6 and a base or support ring ll. The circum
ferential extent of cam Ill, as shown in Figure 2,
will be su?icient to embrace from moment to
moment the jacks lying in that centre in which
the vertical jack movement will occur under the
action for instance of cam 15.
The needle selecting means illustrated is of
well known type comprising a tricked cylinder I8
having in its tricks a plurality of pattern-con
or near their upper ends but these spring bands
are found in practice to be insu?icient to provide
spring or is so formed of resilient material that
the butt at its end is normally held resiliently in
one position, e. g. at a position within the in?u
ence of a lifting cam, and is operable against that
spring or against its own resilience into another
position, e. g. into a position whereby it is not
engaged by a lifting cam.
Moreover, a needle jack within the present
trolling bits H! which operate through the inter
~10
55
2
2,113,053
mediary of vertically spaced presser cams 20 on
butts 2| provided on swinging elements 22 of
which there is one such element associated with,
to lie in front of and to press against the spring
end I30 of each jack l3. The pattern selection
of the needles will be in accordance with the lay
out of butts such as 23 on bits 19 and the lay out
of the butts 2!.
The invention is particularly useful in the case
10 in which needle-selecting means and sinker—se—
lecting means are employed, as described in U. S.
patent application, Ser. No. 94,666, ?led Aug. 6,
1936. This is so because in that case the sinker
mechanism, which must necessarily occupy a
15 certain vertical dimension, is disposed above the
needle-selecting drum and in order to give ade
quate clearance between the two patterning de
vices extra long jacks are required. This condi
tion is indicated in Figure l in which sinkers 24
are selectively controlled from a sinker pattern
ing drum 25 formed with tricks for the reception
of pattern bits 26 which control and select sinkers
24 through the medium of vertically spaced
swinging cams 21 and intermediate selector ele
ments 28. Owing to the necessity for allowing
adequate space for the needle-patterning mecha
nism controlled from drum l8 and for the sinker
patterning mechanism controlled from drum 25,
the jacks in the present example are made suffi
ciently long by using a main selecting jack I 3
and an intermediate jack [2. By this means,
the jacks l3 may be conveniently removed from
the lower cylinder, whereas had the jack extended
back of the needle as in United States Patent No.
1,722,989, it would not have been possible to With
draw same.
The invention is equally applicable to a ?xed
cylinder machine in which case the patterning
mechanism as a whole will revolve around the
40 axis of the cylinder in conformity with known
practice. The invention is also applicable to
flat frame or straight bar machines, necessary
modi?cations for the application of the present
invention thereto being well understood.
Alternatively, the invention may be applied to
machines having any other preferred or known
form of needle bed.
We claim:
1. In or for a knitting machine, the combina
tion of needles, sprung needle jacks having rela
tively resilient and non-resilient portions, pat
tern-selecting means to cooperate with the re
silient portions of the jacks, and substantially
rigid means to press upon the relatively non
resilient portions at least during the time at which
the resilient portions are being ?exed by selec
tion of the pattern-selecting means.
2. In or for a knitting machine, the combina
tion according to claim 1 in which the relatively
non-resilient portions of the jacks are situated
at the upper ends thereof and the resilient por 10
tions at the lower ends, and the jacks are ar
ranged beneath their associated needles.
3. In or for a knitting machine, the combina
tion of needles, sprung needle jacks having rela
tively resilient and non-resilient portions, pat
tern-selecting means to cooperate with the resili
ent portions of the jacks, and rigid means com
prising a cam that is moved into engagement
seriatim with the needle jacks to press upon the
relatively non-resilient portions at least during
the time at which the resilient portions are ‘being
flexed by selection of the pattern-selecting means.
4. A circular knitting machine comprising in
combination a needle cylinder, needles and as
sociated jacks therein, said jacks having rela
tively non-resilient upper portions and relatively
resilient lower portions with butts projecting
therefrom, pattern-selecting means to cooperate
with and engage selected butts to move the lower
extremities of the jacks against the resilience of 30
their lower portions, and a. cam relatively ‘rotat
able with respect to the jacks about the axis of
the machine to press against the upper ends of
the jacks seriatim and to engage those ends dur
ing at least the time that the lower ends are be 35
ing moved against their resilience.
5. In a knitting machine, the combination of
needles, sprung needle jacks having relatively re
silient and non-resilient portions, pattern select
ing means to cooperate with the resilient por-.
tions of the jacks, and means relatively rotatable
with respect to the jacks and movable into en
gagement with the needle jacks so as to press
inwardly against the non-resilient portions there
of seriatim, and to engage those portions at least
during the time at which the resilient portions
are being moved against their resilience 'by'the
pattern selecting means.
LESLIE HERBERT‘LEEDHA‘M.
HENRY HAROLD HOLMES.
50
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