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Патент USA US2406579

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Aug. 27,
R'. BAssls'r
msm-communs Ílmf?umrènky Fon Immune “canins
med April 2a, 1945.
- 2 Shawna-sheet- 1
Patented Aug. 27, 1946
UNlTEo STAT Es PATENT* omer; _'
nadoen Bassist, New.
Application April'zs, 1945,» serial Np. seattle-
Briefly stated, the` preferred practice of my
present invention.relatesgßnerally to; knit-1.
invention involves the provision of a needle in
whichk a turned-back beard of magnetically-re-A
ting machin sand; has particu-.lar reference
anism.. t0
While Het, necessarily restricted.
sponsive character is mounted on -a needle shank
all. its phases
to enr particular time of knitting.- meehine. mr »- ; Which is substantially immune to magnetic forces,r
and the mounting of at least one electro-magnet i
in a position in which the beard is subjected toits
ìaventionis primarily intended for and applicable
t0,.- the kind ,0f knitting; meehine which employe e
needle of thel soecalled “spring beard” type. A
magnetic force. By energizing and de-energizing
the magnet inV predetermined timed relation to the
knittingA operation, movements of the needle beard
dee-.die or this kind comprises'. a shank and e.
.edfbaek heard. there. being. a yieldebly» reellel
ierit. articulation between the beard and ehenli
whereby. the. beard ie constantly-»urged inte en
Oreil rarmreeeivine position.. spaced. from the
shank?. Dunne e. predetermined 'phase of. .the
1m' ne..> @veley via... whedit is.; desired te entran -15
the ram theereek. 0f. the.’ needle. and guide it
nrevìouslyedempleted 10.01? ÍOf the.
knitted tehrid ase-'called “presser barf’er equiva.
lent meehaniealî element. ie; eareedtd bearlupen
the .heard and. prees it, inte. ednteetwit 'the' A20
sheet’. this presente beine maintained' until the
beei‘d' d11d Shank are safely. through therme:
viously-knitted loop. l Upon subsequent With
drawal of the presser bar'or-the likeáythûebeard
can be correspondingly effected.
' So far as the broader phases ofthe presentin
vention are1 concerned, it makes' no _difference
whether the needle as a whole is reciprocated t as
iin-.Warp knitting machines, for-example, amongî
others).-, or Whether it remains. stationary during
the knitting operation (as in circular- knittinglma
chinos, for> example). But Whatever the nature
or mode of: operation of the knitting machine may
be, it will embody, of course, a mechanism adapt
ed to perform» a knitting. operation uponvya'rn
supplied to’it,1fa main drive shaft'actuating. this
mechanism,- and a magnetically-controlled needle
beard of 'tlîef character referred to, the electro
tje-assumes its normal open dispositionvwith re-l V25 magnetic. mearìsfbeing operated in timed relation
spoot tó the shank.
to the 'knittingv-.operationg and preferably byv a
" The dse ef; a preSeer-ber'of the. generality@
mentioned. and the operation deeerileed.
means actuated by the main drive shaft of the
machine. For.~ example., I contemplate that the
electro-magnet or magnets- will be controlled by
an electric circuit, and that al suitable switch
Wv 1.-;
known in the knitting machine art.`
It is a general object ofmy present inventionto 'y
provide an improved mechanism wherebythe need
means may. be actuated bythe main drive shaft
for a presser-‘bar may be dispensed With,l This,
(fori subordinate'mechanisr'n driven by the shaft) .
achieves- the desir-able ¿advantage ofy simplifying
the -knitting machine structure,V andr eliminating
tomake and break the electric' circuit -in the de'
sired. timed relation tothe knitting operation. ' `_
' Or` course, there> will be as many electro-'mage
several movable elements, via, the presser bar andV
its associated actuating mechanisme.. Such ‘a simi
nets as maybe needed to‘ control the needlesin
plification is of particularfvaluein machines iti-'_A
tended to operate at relatively highY speedssi‘née’r>
every movable part ofi a‘knitting-.machine entails
problems of accurate mounting and assemblyf
volV-ed. Thus, ina Warp'knitting- machine, for'
example, or in any ~machine' vvl'ierea- largey multi;-
plicity off’ needles are simultaneously operated
duringlthê knitting proceduraa plurality o_f` elec
tro-magnets will be arranged side by 'side-alon'g-'a
suitable' support extending; lengthwise of the. ma
chine, i-ç‘ëfjgparïalijei tothe bank of needles. on
the 'other hand-'in _a’circuiafî knitting vmai-,nine or Y
Wearïand tear, lubrication, Weight,r vibration, and.
the like; and these problems become-Q1@v7 „special
andY unusual magnitude where high-speed move# y
ments, lespecially. oscillatory movements'` such as
those ofapresser bar, areinvolved.
< 'l
f I' achieve.v the principal object of» my invention?
' the like,` wheréonly vone or at inosta small group
’ of needles is operative at any'instant’olf time, one
electro-’magnet may be'_ 'su'ñìcientf 1t Will b_e
understood,"'al`so, that a single electro-magnet
by means-y of a design and association: of parts
whereby- an electro-magnetic` means may be ’suo-r
cessfull-y resorted to to. perform they functions
may be operatively associated with a >group of
heretofore served by a presser bar or other me-. 50
adjacent needles, and that-the invention does not
chanical device of the character; described.4 -Not
necessarily contemplate that there shall be a sep- ' `
only- does such an improvementv involve substan-ï
tial'ly no movable parts, but it lends itself readily!
arate electro-magnet in association with each
which are: currently VcomingJ~ into. greater use. y
In a .relativelysi'mple andpreferred `embodi
to the.. higher speed -machines and ' operations
ment of my- inventiom the beard'. of the-needle
2,406,57 9
is resiliently articulated to the shank, as in the
ordinary “spring-beard” needle, and the beard
normally assumes an open position spaced from
the shank. The electro-magnetic means, in such
are the elements which feed the yarn to the
needles. During the operation of the machine,
the guide bar 25 has a primary reciprocating
a case, is positioned to exert its force upon the
needle beard at predetermined time intervals to
rection, each of the elements 26 passing through
move it into a closed position against the shank,
movement in a generally forward-and-back di
one of the spaces between the needles 20. The
guide bar 25 also reciprocates, in accordance with
the resilient articulation being relied upon to
a predetermined plan, in a longitudinal direction
return the beard to its openv position after the
so as to effect the‘desiredl formation of'yarn loops
magnetic force has ceased to act. Or, conversely, 10 around predetermined needles. The guide bar
a needle may be employed in which the inherent
25> is actuated by mechanism which is driven by
resilience presses the beard normally against the
the main drive shaft.
shank, and in such a case the electro-magnetic
None of the actuating mechanism has been
means may be positioned and arranged to exert
illustrated in the present drawings since it is
its force so as to open the crook of the needle atA 15 generally well-known per se, and since it has no
predetermined times. An unusually eñ'lcient re- ' direct bearing upon the present improvement.
sult can be achieved by a third alternative design
However, it ,will be understood that the various
in which the beard is resiliently urged into a nor
parts are driven in such predetermined timed re
mal position intermediate between the fully-open
lationship that a series of knitting operations are
and the fully-closed positions, and in which a 20 successivelyperformed. An illustrative cycle is
pair of electro-magnets are arranged to exert
best shown in >Figures Y1-5. In each of these
their forces from opposite sides of the needle at
figures, I have shownv one of the needles 20 and
predetermined successive time intervals, one
one of the guide bar Yelements 26; andI have
magnet serving to move the beard into its fully`
indicated in dot-and-dash lines the general dis-v
closed position, the other magnet serving to move 25 position of the sinker elements 24. In Figure 1,
it into its fully open position.
the needle 20 has its turned-back beard 21V in
I achieve the foregoing general objects and
an open yarn-receiving disposition with respect
advantages, and such other objects and advan
to the shank of the needle, and the guide bar ele
tages Aas may hereinafter appear or be pointed
ment 26 has just completed a movement which
out, in the manner illustratively exemplified in 30 has engaged the yarn strand 28 within the crookr
the accompanying drawings in which:
of the needle. The needle is in a raised position.
Figures 1-5 are diagrammatic views showing
The needle now starts to descend for the pur
successive stages in a typical knitting operation,
pose -`of pulling the strand 28 through the pre
and showing an illustrative installation of an
viously-knitted loop 29. During this descending
improved mechanism of the present character; 35
movement-,as indicated in Figure 2.,.the needle
_Figure 6 is a fragmentary perspective view of
beard 2'! moves into its closed disposition with re’
a portion of the knitting instrumentalities in the
spect to the needle shank, thus entrapping the
relationship they assume in an actual machine,
yarn 28 within the crook of the needle, and per
an illustrative electric circuit being shown dia
mitting the needle to pass completely through
40 the loop 29; During this procedure, the sinker
Figure '7 is an enlarged longitudinal cross-sec
24 moves towardV the left, as a comparison of
tion through a knitting needle of the present charFiguresl and 2 will indicate.`
After the free end of the beard 21 has safely
Figures 8 and 9 are views similar to Figures 1-5,
illustrating a modification ofthe invention; and 45 passed through the loop 29, it is no longer neces
sary that it remain in its closedeposition, and
Figure 10 is a similar view illustrating a fur
the continuing descent of the needle is indi
ther modiñcation.
cated in Figures 3 and 4, showing how the yarn
Merely by way of example, I have chosen to
28 is pulled through the loop 29 in order to form
illustrate the present invention as it may be ap
plied to a so-called warp knitting machine. Some 50 a new loop 30.
of the parts of such a machine are shown in
tion, and in Figure 5 the needle has risen to its
operative relationship in Figure 6. In this figure
highest position. In the meantime, the sinker 24
I have shown a multiplicity of knitting needles
has moved into the position shown in Figure 5,
20 extending upwardly from Aa needle bar 2|.
During the operation of the machine, which is 55 to hold rthe newly-formed loop 30 down while the
well-known per se, the needle bar 2| is caused
to reciprocate in an up-and-down direction by
an actuating mechanism driven from a main
drive shaft. The shaft 22 may be considered to
be a drive shaft of kthis character, or a subordi 60
nate shaft driven thereby.
needle 20 moves upwardly. It will also be ob
served that the guide bar element 26 has swung
into a position in readiness for forming a new
loop of the yarn 28 in the crook of the raised
My present` invention is directed primarily to
At 23 I have indicated a sinker bar which car
ries, in well-known fashion, a series of flat sinker
the opening and closing movements 0f the nee
dle beard 21. In the embodiment illustrated in
elements 24 arranged in parallel spaced relation-->
ship and extending through the spaces between
the needles 20. During the operation of the knit
subjects the needle -beard 21 to the electro-mag
Figures 1-5, this lis accomplished by mounting
an electro-magnetic means 3l in a'pcsition which
netic force at the time that the needle beard 21
is to be moved into its closed position. The nee
dle illustrated is of the usual character in which
bar 23 is suitably actuated in the desired timed 70 there is a resilient articulation between the nee
relationship by the main drive shaft, such as the
dle beard 21 and the needle shank. This articu
shaft 22.
lation is in the vturned-back region l32, which is
I have also shown an illustrative guide bar 25
resiliently constructed so that the needle beard
which carries a plurality of depending apertured
normally assumes the position shown in Figures
ting machine, the sinker bar 23 is caused tore
ciprocate> in a forward-and-back direction, in
timed relation to the needle reciprocation. The
elements 26. In a warp knitting machine, these 475A 1, 3, 4 and 5, but may be urged into the position
or' Eìgure‘..?¿ragainstathe action; ot its inherent
sive.I standmiint,I from the. materiali of.y theïshank
ofitheaneedlœ This difference.; resides in theta-ct
that. the-...needle beard 4î1 is; purposely constructed:
InFtgure- 1',..the.e electro-magneticmeans 3 t; is.
inoperative. In Figure. 2;. the'd'otted lines.3l3 .are
intended. to:` indicate that the electro-magnetic.
meßnsisoperative and' is. producing ‘an electrica.
magnetic. ñeld; which exertsjits force upon the
needle beard; 21:.. "Ifl'iemagnet‘31i isrnot: showniir
Figures 3:-5., and; is, inoperative during the phases
of operation 'shown inethese figures..
in such a way that it is: readily' responsive~ to.
electro-magnetic force, while thez material oi the
needle shan-kA is purposely.V made ofÍ a material
various; Ways.
to. such.
, For
10.v the shank ,may be.` composed of.r stainless steel 'or'
f A practicar embodiment: of the invention is.
most clearly shown inv Figure 61 in which I have
illustrativetyf shown the electromagnetic means
in the form of a series of adjacent U-shaped
magnets. For- the` sake of convenience, I have
designated these magnets by the reference nu
meral 3|. They are mounted side-by-side upon
a supporting bar 34 which extends lengthwise of>
the machine. It will thus be observed that each
magnet controls the operation of a series of ad 20
jacent needles 20, the bank of magnets conjoint
ly producing, at desired predetermined times, a
' beard uns dineren-from. a magnetieaiiy-«respom
equivalent allaoywhich is, relatixteiy .immune to.
magnetism, while'. the breal'dlfl may be composed
of.'i carbon; steel` or equivalent materialjwhich. is.
relatively responsive: to- magnetism.; lìiïliereA dife
ferent materials are employed", the parts mayf be`
separately manufactured, and then Welded to
gether at the line or in the region 49, any con
venient welding procedure being utilized for this
purpose. In the alternative, the shank and nee
dle beard/may be formed of a single element, and
the beard 41 subsequently treated (for example,
by chemical action or electroplating or the like),
to impart a relatively magnetically-responsive
magnetic field which aiîects an entire series of
quality to the beard.
In Figures 8 and 9 I have illustrated anv obvious
’ The magnets need not necessarily be U-shaped, 25
alternative arrangement in which the electro
as will be understood, and any magnet construc
magnetic means 50 is arranged on the opposite
tion or design may be employed, provided it pro
side of the needle 5l. In this case, the resilient
duces the desired electro-magnetic field in the
articulation in the region 52 is of such a charac
desired region of the machine. For illustrative
purposes, I have diagrammatically shown the type 30 ter that the beard 53 normally assumes the closed
position shown in Figure 9, whereby the action
of electric circuit which may be employed for
controlling the magnets. `vA suitable energizing
of the electro-magnet 50 (indicated by the lines
of magnetic force 54) serves to draw the beard 53
coil is formed around each magnet. One end of
away from the shank and thus open the needle
the coil is connected as at 35 to the conductive
portion 36 of a control wheel or switch 31. The 35 so that it may receive the yarn 55.
An unusuallyv eiiicient arrangement, constitut
other end of the coi] is connected, as at 38, to
ing a third alternative, is 'shown in Figure 10 in
one terminal 39 of a suitable source of electric
'which the needie 56 has a. beard 51 resiuenuy
power. "A rheostat 40 is preferably arranged with
articulated thereto at 58 in such a manner that
in the lead wire 38, for such adjustments in mag
netic strength as may be desired from time to 40 the beard normally assumes an intermediate posi
tion indicated in full lines. In this position, the
beard kis neither in its fully-closed nor in its
The make-and-break or switch device 31 has
fully-open position, and a pair of electro-magnets
been illustratively shown in the form of a wheel
59 and 60 are arranged on opposite sides of the
or disk mounted on the shaft 22. The conduc
tive portion 36 is arranged on the periphery of 45 needle. The magnet 59 serves at predetermined
time intervals to draw the beard 51 into the closed
-this wheel, and is adapted to ride over an elec
position represented by the dotted lines 6l; while
tric contact 4| which leads from the other ter
minal 42 of the source of electric power. The > the magnet 69 functions at other predetermined
time intervals to draw the beard 51 into its fully~
balance of the peripheral surface of the wheelk
31 is suitably insulated. ` As a result, when the 50 open position represented by the dotted lines E2.
shaft 32 rotates, the electric circuit is periodical-y
ly established and broken, in predetermined timed
relation to the knitting operation, as the con
This arrangement is desirable, despite the provi
sion of a pair of magnets, because less electric
power is needed to eñect the desired movements
of the needle beard. The magnets 59 and 60 are
tact element 4l makes and breaks electric contact
55 energized and deenergized at predetermined times
with the conductive portion 36.
The various coils on some or all of the mag
nets 3| may be interconnected in parallel as
indicated by the connecting wires 43 and 44. For
by a pair of switch arrangements such as that
shown in Figure 6, one switch arrangement con
trolling one of the magnets, the second switch
producing certain effects, a predetermined group
arrangement controlling the other magnet, but
groups ofpmagnets; although all magnet-actua
of magnets may for example be energized and 60 both of them being operated in predetermined
timed relation to the main drive shaft of the ma»
de-energized independently of another group or
It will readily be understood that my invention
tion is always eiîected in a predetermined timed
is by no means restricted to a Warp knitting ma->
relation to the knitting operation itself.
Attention is now directed to Figure 7 in which 65 chine of the character shown, nor to the various
details herein illustrated by way of example.
y I have shown one of the needles on a greatly
Thus, any type of make-and-break mechanism
enlarged scale. In this view I have more clearly
may be employed, other than that diagrammati
shown the shank 45, the resilient articulation 46,
and the needle beard 41, and I have shown the ' cally represented by the Wheel 31 of Figure 6.
For example, av photo-electric device may serve
preferred arrangementy of a slight recess 48 in
to make and break the circuit at the desired time
the shank, within which the free end of the
intervals, or a relay may be interposed-between
beard 41 disposes itself when the beard is ad
the source of power andthe actual make-and
justed into its closed position.
The line of demarkation 49 is intended to indi- `
break mechanism.
' .
cate, diagrammatically,`that the material of the 75 , In general, it Will be understood that the de
tails herein' described and illustrated. may obvi
effect movements of the latter, and means_forÍ
energizing and de-energizing said electro-mag
net in timed relation to the knitting cycle.
ously be modified by those skilled in the art in a
number of respects, Without departing from the
spirit and scope of the invention as expressed
in the- appended claims.
2. In a knitting machine, a needle comprising
' Having thus described my invention and illus
a shank and a turned-back beard, said beard be
\ ing adapted to move toward and away from said
trated its use, what I claim as new and desire
to secure by Letters Patent is:
being composed of a material which is vsubstan
1. In a knitting machine, aneedle comprising
shank during the knitting operation, said shank
tially non-responsivey to magnetic force, said
a shank and a turned-back beard, said beard be 10 beard being composed of a material Which is
readily responsive 'to such force, andan electro
ing adapted to move toward and away from said
magnet positioned to exert its force upon said
rshank during> the knitting operation, said beard
being composed of a material readily responsive
tofmagnetic force, an electro-magnet positioned
to exert its force upon said beard and thereby 15
beard and thereby effect movements of the latter.
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