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Патент USA US3050983

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Aug‘ 28)
Filed June 16, 1959
2 Sheets-Sheet 1
‘11 J2 5
Aug. 28, 1962
Filed June 16, 1959
2 Sheets-Sheet 2
B 6%“
Patented Aug. 28, 1962
Ryozo l‘viasujima, l Gaza Shiota Machi, Chiisagata-gun,
Nagano-lren, .l’apau
Filed .llune 16, 1959, her. No. 82tl,719
9 Claims. (til. 66-121)
This invention relates to improvements in knitting
front base 5 and a rear base 5’ formed integrally with
the stem 1. Either of the two bases 5 or 5’ may have a
socket, but as shown, the base 5’ is provided with a socket
A concavo-convex spring 7 is placed between the latch
2 and the two bases 5 and 5', throwing a bridge between
the two bases. The spring 7 has a bent. end 8 which is
adapted to be inserted into the socket 6 so as to ?x the
needles. More particularly, this invention in concerned
spring 7 in place. The spring 7 may have a round or a
with automatically replaceable structures of the latch car 10 square section or may be a leaf. Spring 7 is initially
ried swingably by the stem of the needle, and adjuncts
curved longitudinally thereof and, in the operative posi
tion in the stem of the needle, has its initially convex sur
Spring-loaded latches for knitting needles are known.
face engaging the pivot end of the latch. The arrange
However, it has been necessary to provide a very special
ment of the parts is such that the pivoted end of the latch
latch to associate a spring with the latch or to provide
2 maintains the spring '7 resiliently deformed into the slot
considerably complicated ?ttings to ?x the spring to the
3 to an extent such that the initially convex surface of the
stem. in addition, the provision of an automatic latch-re
spring '7 is always maintained concave toward the pivot
placing means brings such troubles as a poor feed or snap
end of the latch.
of yarn. Furthermore, since a slot provided in the stem
The latch 2 has a cam portion 11 arranged on its lower
is less than 1.0 mm. in width, it is extremely difficult to 20 side extending outwardly from the pivot 4 and is arranged
mount a complicated mechanism inside such a narrow
to cooperate with a hook 9 formed conventionally at the
slot. Accordingly, it becomes possible to mount such a
front end of the stem 1. The cam portion 11 is adapted
mechanism only in a specially large needle and it is not
to depress the spring 7 when the latch 2 is engaged with
only inconvenient and uneconomical but also apt to bring
the hook 9, and latch 2 is stabilized when the cam portion
troubles to apply such a mechanism to knitting needles 25 11 recedes from the spring 7 by the reaction thereof.
in general. Moreover, the special mechanism has been
it is preferred to form the periphery of the latch 2 so as
an obstacle to development of the commercial production
to include a circular surface 12 concentric with the pivot
of specially constructed knitting needles. Because of such
4 and a ?at or straight surface 13 connecting surface 12
drawbacks as set forth hereinbefore, no knitting needle
with cam portion 11. ‘Surface 12 is so disposed that it is
having an automatic replaceable latch as above has been
in engagement with the spring 7 when the latch 2 is swung
used practically.
clockwise from the position shown in full lines in FIG. 3.
The object of this invention is to provide a knitting
Normally a latch 2 does not occupy the position closing
needle of the class described avoiding the above draw
the hook h, so as to hook a yarn easily. However, when
backs so as to be practical and effectively economical.
a yarn positioned on the stem 1 is ‘displaced towards the
Brie?y stated, in accordance with one aspect of this in
book 9, the latch 2 is pushed by the yarn from the position
vention, there is provided a knitting needle comprising a
indicated as L in FIG. 3 towards the hook 9. When the
stem having a longitudinal slot having two bases, a latch
tip of the latch 2 approaches the hook 9 or just contacts
swingably mounted on a pivot provided within the slot,
therewith, the spring 7 is pushed and bent by the cam
and a spring placed on the two bases so as to act on the
portion 11 of the latch 2 so as to push it back at ‘a con
tacting point 14. Therefore, when the yarn has passed
The invention will be better understood and other ob
the latch 2, the latter is biased to the L position immedi
jects and additional advantages of the invention will be
ately and stabilized there. it is to be noted that the yarn
come apparent upon perusal of the following description
is not caught by the hook 9 but left free ahead of the
taken in connection with the drawings illustrating several
hook 9.
embodiments of this invention, in which:
Referring now to FIG. 4, the latch 2 has a longer
FIG. 1 is a side elevation view of a knitting needle;
straight surface between the circular surface 12 and in
FIG. 2 is a plan view thereof;
the cam 11 than the preceding embodiment and thus is
FIG. 3 is a side elevation view, partly in section and
biased equally by spring 7 at any position wherein the
on an enlarged scale, of an essential part thereof;
tip of the latch 2 is in the proximity of the hook 9.
FIGS. 4-9 are views similar to FIG. 3 but showing
Referring now to 'FIGS. 5 to 8, inclusive, the arrange
modi?ed embodiments within the scope of this invention;
ment of the spring 7 is modified variously. In FIG. 5,
the space between the two bases 5 and 5" of the slot 3,
FiGS. l(l-l2 are views similar to FIG. 3 showing the
neither of which has a socket 6 but both of which have
method of mounting a spring on a stem of the knitting
uninterrupter surfaces 15, is bridged by the spring 7. In
FIG. 6, there is a step 16 in the base 5', whereby the
Similar numerals refer to similar parts throughout the
spring 7 is ?xed in place. In FIG. 7, there are two steps
several views.
17 and 16 in the two bases 5 and 5', respectively, where
:Referring more particularly to the drawings, the pre
by the spring 7 is ?xed in place. In FIG. 8, an end of
ferred embodiments of this invention will now be de
the spring 7 has one end secured in one of the bases 5
scribed; however, this description will be understood to be 60 and 5' and the other end is extended ‘along the surface
illustrative of the invention and not as limiting it to the
of the other of the bases 5 and 5’ so as to bridge between
particular constructions shown and described. Tin-ough
the bases 5 and 5’.
out these embodiments, one of the characteristics of this
Referring now to FIG. 9, still anodier embodiment is
invention consists in arranging a latch and a spring on the
65 shown in which latch 2 has two straight surfaces 13 and
stem of the knitting needle so as to locate the latch within
18, one on each side of the circular surface 12, whereby
a range where the spring acts on the latch in order to posi
the latch 2 may be stabilized in two positions L and M.
tion the latter automatically.
In the L position, the straight pant 13 of the latch 2 en
There is a stem 1 of a knitting needle as shown in FIGS.
gages spring 7 while the tip of the latch Z is inclined to
1 and 2. A slot 3 is formed in the stem 1 so as to hold 70 wards the book 9. In the M position, the straight part
a latch within the slot 3, this latch 2 being mounted swing
18 of the latch 2 engages spring 7 while the tip of the
ably on a pivot 4 as shown in FIG. 3. The slot 3 has a
latch 2 is inclined away from hook 9.
Referring now to FIGS. 10 to 12, inclusive, a method
of ?xing spring 7 in place is illustrated. Spring '7 has a
relatively elongated and curved body, the end 8 being
bent perpendicularly to the body and extending toward
the inside of the curve. The other end of spring 7 is
inserted between the latch 2 and the two bases 5 and 5'
of the slot 3 as shown ‘in FlG. 10. Thus, in FIG. 11,
the space between the two bases 5 and 5' is bridged by
the spring '7 so ‘as to position bent end 8 over the socket
6 provided in the base 5’ of the embodiment shown in
FIGS. 3, 4 and 9. Then the spring 7 is turned upside
down through 180° so as to engage the bent end 8 in
the socket 6, as shown, for convenience, in FIG. 12 in
which the bent end 8 is shown as if held by a certain
means. Thus the furnished spring 7 is made further effec
tive by being bent oppositely to the original curve.
Furthermore, it is possible to provide an appreciably
long material ‘for the spring 7, having an end 8 bent at
the right angle to the body. After the body of the ma
tegrally with said stem, and a latch pivoted swingably to
and fro on a pivot provided within said slot, comprising
the steps of bending one end of a longitudinally curved
spring in the direction of its concave surface, inserting the
other end of said spring between said two bases and said
latch with the concave surface facing the latch, inverting
said spring to engage its convex surface with the latch,
and engaging said bent end in a socket formed in one of
said two bases.
2. A latch type knitting needle having a stem and a
hook at one end of the stem, the stem being fomred with
a longitudinal groove adjacent the hook end, and the bot
tom of the groove having a longitudinal slot therethrough
of less length than the length of the groove to form a pair
of bases spaced longitudinally by said slot; a latch pivoted
at one end in said groove for cooperation with said hook;
and a relatively elongated initially longitudinally curved
substantially ?at spring longitudinally bridging said slot
and with its ends seated on said bases; the‘ pivoted end of
terial is inserted between the bases 5 and 5' and the latch 20 said latch being curved and engaging the initially convex
surface of said spring and, in all positions of said latch,_
2 and turned upside down as above, a suitable length of
maintaining said spring resiliently deformed into said slot
the body is cut oftc for the unit and the bent end h thereof
to an extent that such initially convex surface is concave;
is engaged with the socket s as shown in PEG. 3, while
said pivoted end of said latch having at least one flat en
the remainder of the body is used for another unit and
gageable by said spring to bias said latch to a pre-set posi
a bent end it is again formed in the remainder. '
tion relative to said hook.
in accordance with this invention, it is not necessary
3. A latch type knitting needle, as claimed in claim 2,
to provide a special means outside the knitting needle in
in which said pivoted end of said latch is formed with a
order to replace the latch ‘automatically. The object of
cam portion eccentric to said pivot and engageable with
this invention is attained by means of the spring 7 which
said spring to bias said latch to an open position in which
is very simple but reliable. Accordingly, it becomes pos
it extends toward said hook but is spaced therefrom.
sible to avoid the complication and trouble inherent in
4. A latch type knitting needle, as claimed in claim 2,
‘the special means of prior art, to simplify a knitting ma
in which the pivoted end of said latch has a portion of its
chine, to make a knitting operation more speedy, steadier,
periphery which is circular and concentric with said pivot,
and easier, and to obtain ‘a better ?nished fabric.
and which connects at one end with another peripheral
Spring 7 is retained against displacement by virtue
of the walls of groove 3, its engagement with the bases
5 and 5’, and engagement with the pivot 1% end of latch
22. By virtue of the fact that spring 7 is disposed along
the bottom of the slot 3, there is no chance of the spring
interfering with the yarn feeding or casting off which
might occur when using special latch operating means
known to the prior art.
In accordance with this invention, it is possible to
stabilize the latch in such required positions as the front
position, required for the yarn feed, and the rear position
resulting from a knitting yarn loop, whereby the action
portion which comprises said flat; whereby said latch is
stabilized in a position in which said ?at is in engagement
with said spring.
5. A latch type knitting needle, as claimed in claim 4,
including a second ?at peripheral portion extending from
the opposite end of said circular portion; whereby said
latch is stabilized in either of two positions in each of
which one of said ?at peripheral portions is in engagement
with the spring.
6. A latch type knitting needle, as claimed in claim 2,
in which said spring has one end bent at right angles to
of the latch, and accordingly of the knitting machine, is
the body of the spring in the direction of its initially con
made more accurate and, at the same time, lighter and
cave surface; said one end being engaged in a notch
formed in one of said bases.
It may be seen that it is very easy to adapt the knit-ting
needle in accordance with this invention to conventional
knittingv machines for domestic use and for industrial use.
It may also be seen that the knitting needle in accordance
with this invention may be mass produced to obtain an
inexpensive, economical ‘and durable product.
While particular embodiments of this invention have
been illustrated and described, modi?cations thereof will
readily occur to those skilled in the art. It should be
understood therefore that the invention is not limited
to the particular ‘arrangements disclosed but that the ap
pended claims are intended to cover all modi?cations
which do not depart from the true spirit and scope of the
What I claim is:
1. A method of mounting a spring on a knitting needle
of the type having a longitudinal slot formed in the stem
thereof, said slot having a front and rear base formed in
7. A latch type knitting needle, as claimed in claim 2,
wherein one of said bases is formed with a stepped portion
positioning an end of said spring.
8. A latch type knitting needle, as claimed in claim 7,
wherein both of said bases are formed with stepped sur
faces receiving ends of said spring.
9. A latch type knitting needle, as claimed in claim 2,
wherein one of said bases is formed with a longitudinally
extending recess in which is inserted one end of said
References Cited in the ?le of this patent
Morith ______________ __ Aug. 12, 1941
Australia ____________ __ June 15, 1899
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