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Патент USA US2113788

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April 12, 1938.
Original Filed Oct. 1, 1936
2 Sheets-Sheet l
Louis Hirsch
April 12, 1938.
“ 2,113,788
Original Filed Oct; 1, 1936
2 Sheets-Sheet 2
L o“ It 5 H1? rsch
Patented Apr. 12, £938
ir 1x
MAC??? ‘ " S
Louis Hirsch, Weehawken, N. J.
Application October 1, 19st, Serial No. reason
Renewed February 8,1938
5 Claims. (CE. 66-114)
This invention relates to a new and useful im
provement in needle bars for flat knitting ma
chines and in particular for those of the single
unit type upon which stockings are knit complete
5 and‘in which the central section of the needle
bar is swingable out of knitting position so that
which are positively bolted to the particular sec
tion and the needles of which are accurately
aligned with the other needles.
The sections are transferable from one section
to another without di?iculty and are inexpensive. 5
They may correspond exactly in construction to
the knitting of the instep may be suspended with- . the standard single ‘unit needle bar and because
out removingthe instep loops from the needles they are positively bolted thereto from an integral
part thereof. Thus the invention embodies the
while the heel tabs are being knit.
In stockings of different sizes the widths of essential feature of simplicity, rigidity and ac 10.
.- theinstep and adjacent foot ‘portions should vary curacy of alignment and the equally important
commercial attributes of cheapness, reliability ‘
in. order to maintain the proper proportions be
and ease of manipulation.
tween them so ~‘that each will cover the corre
One form of the invention is» illustrated by the
sponding parts of large and small feet. In pres
l5 ent day single unit machines this is impossible accompanying drawings, of which
Figure 1 is a front elevation of the needle bar;
because no-means is provided for altering the
length of the several needle bar sections.
It has been suggested that thin needle bar sec
tions be swingably mounted between the swing
Fig. 2 is a plan view thereof showing the cen
tral section swung out of knitting position;
Fig. 3 is a view partly in section along the line
ing and ?xed needle bar sections so that one or . 3—3 of Fig. 1 viewed as indicated by the arrows; '
20 more of them may be used with either, the ?xed ~
Fig. 4 is a front view of the right end of the
or swinging sections, as the case may be, by the
' adjustment of a restraining bolt adapted to bear
against the frontedges of one or more of these
25 sections. This device has not proved commer
cially practicable because of the impossibility of
maintaining the thin sections in the essential
accurate alignment with the other portions of
the needle barv or accurately spaced in relation
to the other needles.
- ,
Another attempt to solve the. problem was, a
needle bar, in which the‘ thin sections are elimi-
nated and a number of complete, swingable cen
tral needle bar sections of diiferent lengths sup
35 plied, the adjacent rigid sections of the needle bar
' being adjustable longitudinally to complement
the shorter or longer central sections. This de
vice has also failed to meet commercial approval
because of the large cost of the many central
.40 sections required for even one single machine, the
labor and di?culty of replacing one with another,
and the di?iculty of properly adjusting the rigid
sections to secure the extremely accurate needle
spacing required and yet leave sui?cient clearance
45 for the free swinging of the central section.
The invention herein differs from those men
tioned in that there are no loosely mounted auxil
iary sections as in the ?rst example and no com
plete replaceable central sections or adjustable
50 rigid sections as in the second example. To the
contrary, the rigid and central sections are per
manent, and positively positioned .parts of the
needle bar the variations in length'being obtained
by small sections which can be transferred- from
.55 the rigid to the central sections or vice versa but
left section of the needle bar with the removable
sections detached therefrom;
Fig. 5 is a similar view of the adjacent left
end of the central section of the needle‘bar with
the removable sections similarly detached;
Fig. 6 is a sectional view of a part of the left
and central needle bar sections on the line 6-6
of Fig. 3 viewed as indicated by the arrows; and
Fig. '7- is a view in’perspective of one of the
removable needle bar sections; and
Figure 8 is a front view corresponding to Figs.
4 and 5 and showing a modi?ed form of the in
\As' already generally stated and as shown in
the drawings the needle bar consists of'a swingable
section i and end sections 2 and‘ 3 which are
rigidly bolted to the needle bar support. Each
of these needle bar sections consists in general of
a face plate, a needle bed grooved as usual to 40
receive the needles 6 and needle clamps. In the
case of the swingable section I the face‘ plate may
be integral with the swingable support 8 which,
as is well known, swings upon a pivot such as 9.
The needle bed 5 is held against the face plate by 45
bolts i0 and'the clamps are held against the
_needles and needle bed by bolts H. In short,
the general construction of the needle bar sections
may be strictly, standard. Also the mounting of
the central swingable section 8 may conform to co
standard practice including the automatic look
ing and releasing mechanism which is indicated
at i2 in Fig. 1, but not described since it forms‘
no part of the present invention.
The inner end of each of end sections 2 and 3
of the needle bar terminates in a number of
short sections l3, l3“ each carrying a number of
step and foot widths without a?ecting thestand
ard single unit needle bar designin general or
the mode of operation of the machine. The es
a part of the central needle bar section at each sential feature of rigidity and accurate needle
end thereof. As shown, each of these sections alignment are evident and also the commercially
carries four needles but this‘ may be varied as‘ equally important features of simplicity and low
desired, as may the number of sections.‘ Each cost. Needle bars of existing single unit ma
section may conform in general to standard chines may be readily provided with this inven
needle bar construction, as shown in Figs. 3 and tion without even altering the standard construc
tion in general of the needle bar itself.
10 '7. That'is to say, each may consist of a face
A modi?ed form of the invention is illustrated
plate l5, needle bed l-6 held upon the face plate
in Fig. 8 in which the two sets of removable needle
. by a bolt I'I anda needle clamp I8 held in posi
tion by‘ a bolt l9. Therefore, each section is a bar sections shown in Figs. 4 and 5 are replaced
complete needle holding device.
by a pair of similarly removable'sections 26 and
Each section is also drilled as at 20 to permit 2'! similar in construction in all respects with 15
the passage therethroughof a bolt 2iEL whereby the exception that the length of section 26 is
the small sections may'be bolted securely to the equal to the combined lengths of sections l3 and
remainder‘of the needle bar sections. Since the |3e of Fig. 4 and the length of the other section
clearance between the end and central sections 21 is equal to the combined lengths of sections
M, Ma, and W’ of Fig. 5. In other words, section 20
20 should be only suf?cient to permit the central
section to swing freely the two small sections 13 26 carries eight needles corresponding to two of
vand Id at adjacent ends should be countersunk to the small four needle sections and section 21
receive the heads of bolts 2| as shown in Figs. 1 carries twelve needles corresponding to three of
the small sections. Each of these sections is pro
and 6.
a .
In order to insure .accurate alignment a‘recess vided with a groove 24 similar to the groove bear 25
ing the same number shown in Figs. 4 and 5, but 22 is provided in the end sections 2 and 3, a cor
responding projection 23 upon one side of all but because of their greater length the rib 23 of the
one, H, of the small sections, and a corresponding sections shown in Figs. 4 and 5 may be supplanted
recess 24 upon the other side. Each projection by another groove 28 and the groove 22 in the
30 23 is designed to ?t accurately into recess 22 or
end section 2 of the needle bar may be sup 30
-24. The projection 23 is omitted from the small planted by a rib 29 corresponding to rib 25_ on
.the other section I. Thus either one of each pair _
sections l4 which constitute the ends of the cen
tral needle bar section‘ I as shown most clearly in of removable sections may be attached to, either
Fig. 5 so that there will be no interference with the end or ‘swinging section of the needle bar.
The lengths of the pairs of removable .sections 35
the closing of the central section I.
If each of the small sections is of the same shown in Fig. 8 may be varied to supply all of the
length it will be evident that, with the exception combinations possible with the larger number of
small sections shown in Figs. 4 and 5. This form
of the two sections which are countersunk to re
ceive the heads of bolts 2| they may be shifted so of the invention has the advantage of greater
strength and somewhat greater simplicity but 40
40 as to make needle bar sections 2 and -3 shorter or
longer and to correspondingly lengthen or shorten the disadvantage of necessitating the carrying
the central swingable section I. This is made in stock of a considerable number of pairs of
perfectly clear in Figs. 4 and 5. In Fig. 4 two different needle capacities for each machine. For
“small sections l3 and '3a are shown removed from example, the live small sections shown in Figs. 4 '
the rest of left end section 2. Section I3 is and 5 provide for six diiferent instep widths and 45
countersunk to receive the head of bolt 2]. To they all form a permanent part of the needle bar.
shorten section 2 the left small'section l3“ may To secure a ?exibility equivalent to that‘ of the
be removed and the other small section I3"L re- ' form of the invention shown in Figs. 4 and 5 three
placed and rigidly secured by bolt 2|, the projec
di?erent pairs of removable sections would be
required only two of which would be attached to 50
50 tion 23 ?tting within recess 22. 3 Similarly as
shown in Fig. 5 the small sections I4, 14*, and the needle bar at one time. Since a standard
knitting machine ‘is able to knit say twenty or
[4b may be removed from central section I, sec
tion l3a added thereto and the four sections re
more stockings at one time and the needlebar
placed and secured by bolt 2|“. Section; I is for each would require duplicate pairs of remov
provided with a projection 25 which will register able sections the problem of storing the sections
needles. Similar small sections l4,‘ l4", I4"J form
.with recess ~24 of small section 13 or with the
similar recess of any other small section. Similar
rearrangement will, of course, be made between
the right end of section I and the left end of sec
60 tion 3 which are also provided with similar small ,
needle bar sections, as shown in Figs. 1 and 2.
Therefore, by simply transferring one or more
small sections from end sections 2 and 3 to the
’ central section I or vice versa, the several sections
may be lengthened or shortened symmetrically
to any desired degree in steps of four needles
not in use might be troublesome and for that
reason the form of the invention shown in Figs.
4 and 5 in which all of the sections form a part of
the needle bar at all times is preferred.
What I claim is:
1. 'A needle bar for a ?at knitting machine con
sisting of ‘a pivoted central section and ?xed end '
sections, said central section terminating at each
end in segments positively attached to the re
mainder of the central section but adapted to 65
be removed therefrom and to be positively at
more or less to a side depending upon the. needle - tached to the adjacent ends of the ?xed sections
carrying car deity of each small section and the thereby‘shortening the central section and corre
number of small sections provided. When this is spondingly lengthening the vfixed sections.
2. A needle bar for a flat knitting machine con 70
done each section of the needle bar is substan
tially as solid as though made in one piece and ‘ sisting of a pivoted central section and fixed end
functions the same in every Way. As previously, sections, the ends of said .central section and the
suggested the number of small sections and the adjacent end of each ?xed section each termi
needle capacity of each may conform to the re
nating in one or more‘ segments ‘positively at
quirements and permit of a wide latitude in in
tached thereto but adapted to be removed there 75
' ‘from to shorten it and to be positively attached to
the adjacent end of the adjacent section to corre
spondingly lengthen it. ‘
3. A needle bar for a ?at knitting machine
according to claim 2 in which the removable seg-,
ments are bolted directly to the remainder of the,
corresponding needle bar section.
4. A needle bar for a ?at knitting machine con
sisting of a pivoted central section and ?xed end
with means on each segment for securing accu-'
rate alignment between the non-segmental and
segmental parts.
5. A needle bar for flat knitting ‘machines con
sisting of a pivoted central section and ?xed end
sections, the ends of said central section and the
1 adjacent end of each ?xed section each terminat
ing in one or more segments rigidly attached
thereto but adapted to be removed therefrom to
sections, the ends of said central section and the ‘ shorten it and to be rigidly attached to the adja-_ 10
10 adjacent end of each 'iixed section each termi
nating in one or more segments rigidly attached
" thereto but adapted to be removed therefrom to
shorten it and to be rigidly attached ‘to the adja
cent end of the adjacent section to correspond
15 ingly lengthen it, the ‘non-segmental parts of each .
section being provided with means cooperating
cent endof the adjacent section to correspond
ingly lengthen it, the non-segmental part of each
section and also each segment being provided
with means for securing accurate alignment be
tween associated segments and between such'seg- ‘
ments and the non-segmental part oi’ the section.
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