close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3044436

код для вставки
July 17, 1962
A. M. GARDNER ETAL
3,044,427
SEWING MACHINES WITH IMPROVED LOOP DEFLECTOR
Filed April 26, 1960
INVENTORS
August M. Gardner
WITNESS
Anthony C. Zby/uf
BY
W21TTQRNEY
6m.“
cc
3,044,427
SEWING MACHINES WITH IMPROVED
LOOP DEFLECTOR
August M. Gardner, Elizabeth, and Anthony C. Zbylut,
Bayonne, NJ., assignors to The Singer Manufacturing
Company, Elizabeth, N.J., a corporation ‘of New Jersey
Filed Apr. 26, 1960, Ser. No. 24,783
1 Claim. (Cl. 112-187)
3,044,427
Patented ‘July ‘1'7, 1962
manner. The mechanism 27, which’ carries the lower
thread 30, is similar to the’ lower stitching mechanism
shown in United States Patent No.- 2,761,402, and thus
need not bedescribed in complete detail.
say that the C-shaped shuttle body 28 is held to the
frame of the sewing machine 15 by a pair of screws
31-31 and that the shuttle gate 29v is held in closed
position by a pair of turnable latches 33-33. An elon-'
gated cap 34 having two holes 36-36 is secured to the
This invention relates to shuttle type sewing machines 10 upper’ portion ofthe C-shaped shuttle body 28 bya pair
and more particularly to a needle thread loop de?ector
of screws 37—37 passing through the holes 36—36.'
carried by the shuttle raceway cap, and the primary object
The C-shaped shuttle body 28 and the gate 29, when
of the invention is to provide an improved means for
clamped together by latches 33-33 form a raceway
de?ecting the needle thread loop of a shuttle type sewing
(not shown) which accommodates a conventional shuttle
machine.
15 38 which is driven by a driver 39. The shuttle 38 is
Another object of the invention is to provide an im
formed with a beak 41, the function of which will
proved means for mounting a loop de?ector in a shuttle
presently be described. By reference to FIGS. 5 and 6,
type sewing machine.
it will be noted that the cap 34 has a partially U-shaped
A further object of the present invention is to provide _
needle receiving aperture or opening 42. One side 43
an improved loop de?ector which, because of its shape 20 of the opening 42 is substantially straight whereas the
and position in the sewing machine, renders the sewing
other side has a straight portion 44 and a portion at a
machine capable of sewing lace or doing darning when
bevel as shown at 46. The straight end 47 of the needle
there is little or no work between the presser foot and
receiving opening 42 is perpendicular to the side 43 and
the throat plate of the sewing machine.
also perpendicular to the straight portion 44. Depend
A still further object of the invention is to provide an 25 ing from the end 47 of the opening 42 is a loop de?ector
improved loop de?ector which will not snag the needle
lug or dependency 51. The lug 51 is not symmetrical
thread.
in that the side or edge 52 is ahnost perpendicular, as
With the above and other objects in View, as will here
best seen in FIG. 6, whereas the side or edge 53 has a
inafter appear, the invention comprises the devices, com
slight curve extending at an angle of approximately 45
binations and arrangements of parts hereinafter set forth 30 degrees with respect to the vertical. Also, the lowermost
and illustrated in the accompanying drawings of a pre
position or bottom of the lug 51 is curved as at 54. / ’
ferred embodiment of the invention, from which the
When the sewing machine 15 is being used to produce
several features of the invention and the advantages at»
stitches and the needle 22 is in its lowermost position
tained thereby will be readily understood by those skilled
(FIG. 2), the work limb 26 of the thread 23 is on the
in the art.
loop seizing side of the needle 22, which side is formed
In the drawings:
‘
with the shortgroove 56. At the same time, the supply
FIG. 1 isv a fragmentary elevational end view of a
limb 24 of the thread 23 is positioned in the long groove
shuttle type sewing machine provided with an improved
57 of the needle 22. As the needle rises from the lower
loop de?ector embodying the present invention,
most position shown in FIG. 2 to an intermediate posi
FIG. 2 is an enlarged sectional view taken substantially 40 tion shown in FIG. 3, the grip of the work 18 on the
on the line 2-2 of FIG. 1 and showing the sewing ma
work limb 26 of the thread 23 causes the thread 23 to
chine needle in its lowermost position,
form a loop 58 onthe loop seizing side of the needle.
FIG. 3 is a view similar to FIG. 2 but showing the
Formation of this loop 58 tends to feed thread 23 back
needle after it has risen slightly above its lowermost
wardly through the eye 59 of the needle 22 and thus
position,
45 tends to form a small loop in the supply limb 24. In
FIG. 4 is a view similar to FIGS. 2 and 3 but showing
order that the beak 41 may enter the loop 58 on the loop‘
the needle in a further raised position,
seizing side of the needle, it is desirable to have a large
FIG. 5 is an enlarged perspective view of the shuttle loop form in the work limb 26 and it is undesirable to
raceway cap, and,
a
have ‘an appreciable loop form in the supply limb 24.
FIG. 6 is an enlarged front view of a portion of the
In order that the maximum loop may be formed in
part shown in FIG. 5-.
the work limb 26 and in order that as small a loop as
With reference to the drawings, the invention has been
possible, or no loop at all, be formed in the supply limb
shown as embodied in a shuttle type sewing machine 15
24, the present invention provides the cap 34 with the
having a bed plate 16 accommodating a throat plate 17
previously described depending, lug 51 located or‘posi
on which rests the work 18 to be sewed. The work 18 in 55 tioned adjacent to the long groove 57 side of the needle
this instance may comprise ordinary cloth or lace or
22. Thus when the needle 22 rises from the position
when the sewing machine 15 is being used for darning
shown‘ in FIG. 2 to the position shown in FIG. 3 vand
there may actually be no work on the throat plate 17 at
further to the elevated position shown in FIG. 4, the
the point of stitch formation. A presser foot 19 carried
loop de?ect-or lug 51 will prevent formation of an ap
on the lower end of a presser bar 21 forces the work 18 60 preciable thread loop in the supply limb 24 and at the
against the upper surface of the throat plate 17. A re’
same time will assure that a proper sized thread loop will
ciprocatory eye-pointed needle 22 carries the upper or
be formed in the work limb 26 on the loop seizing side
needle thread 23 and as the needle 22 descends, the needle
of the needle. This is accomplished by having the loop
22 penetrates the work 18 and carries both the supply
de?ector lug 51 located close to the long groove side of
limb 24 and the work limb 26 of the thread 23 through 65 the needle and thus close to the supply limb 24 of the
the work 18 and below the throat plate 17. The needle
thread'23. Because of the proximity of the loop de?ec
22 and the needle thread 23 cooperate in the formation
tor lug 51 to the supply limb 24, a large sized loop
of stitches with a lower thread manipulated by a lower
cannot form in the supply limb 24. At the same time,
stitching mechanism 27. The mechanism 27 includes,
since a loop de?ector is not located on the loop seizing
among other well known elements, an open sided sub 70 side of the needle 22, there is nothing to prevent a large ’
stantially C-shaped shuttle body 28 and a shuttle gate 29,
loop forming in this, the limb 26. Persons versed in
the latter being hinged to the shuttle body 28 in a known
the sewing machine art will understand that the beak 41
3,044,427
'
of the shuttleg38‘e1itersthe large loop 58 on the loop
seizing side of the needle as part of the well known proc
ess of stitch formation. The edge of the loop de?ector
lug 51 is beveled or cut away as at 53 in the manner
4
a shuttle body arranged to turnablyrmount said shuttle,
a shuttle body cap secured to said shuttle body, a loop
de?ecting lug depending from said shuttle body cap, said
‘loop de?ecting lug having one substantially straight side,
best shown in‘ FIG.>6. This assures that the lug 51, will 5 one slightly curved side and a curved bottom.
not snag the needle thread 23 during the stitching opera
References Cited in the ?le of this patent
tion; ‘,Also, as best seen in FIGS. 24, the bottom 54 of g
UNITED STATES PATENTS
the lug 51 is rounded in a gentle curve.
Having ,thus set forth the nature of this invention,
571,322
, Klemm ____-_ _________ __ Mar. 10,
what we claim herein is:
,
I
r
A sewing machine having in combination an eye
pointed needle arranged tomanipulate a needle thread,
a lower stitch ‘forming mechanism/arranged to manipu
845,092
1896
Jacob et a1; ___________ .._ Feb. 26, 1907
944,740
Madison _________ _...;_.__- Dec. 28, 1909
2,544,227
Hohmann __» ___________ __ Mar. 6, 1951
697,978
Germany ____________ __ Oct. 29, 1940
late a lower thread and to cooperate with said eye
pointed needle in the formation of stitches, a shuttle
carried as a part of said lower. stitch forming mechanism,
'
FOREIGN PATENTS
Документ
Категория
Без категории
Просмотров
0
Размер файла
309 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа