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Патент USA US2137757

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Nav. 22, w38.
c.. T, GOULD ‘Er AI.
2,137,757 `
Ä‘TTÃQBMEWÈ FÜR S'È'ETCH ÍTÜB‘MÍNG MÍEÍQHPX‘ÑISMS ÜF SEWING MACHINES
Filed June 2li, 1937
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Charles 1I Gould,
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JícrberlJ/lîßonnß‘y,
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Patented Nov. 22, 1938
2,137,757
UNITED STATES PATENT oFFlcE
2,137,751 '
A'r'rAonMENilv Fon
STITCH FoRMING
MEoHANlsMs or SEWING MACHINES
.Charles Tr Gould and Herbert M. Bonney,
Walpole, Mass.
Application June 21, 1937, Serial No. 149,288
1'4 claims. (ci. 11a-2)?
This invention relates to sewing machines >and
particularly to a sewing machine designed 'to
'stitch together the opposite walls of a pad con
taining ñuiiy material to expand when pressure
5
is removed therefrom.
-
,
,
The object of the invention- is to form elon
gated loops in the stitches as formed, the length
or these loops being sufñcientto take care of the
subsequent expansion of the pad.
hooked thread-pulling member moved to the end
of its rear movement andwith the loop of thread
clamped between the two plates of the loop
holding member, this view showing in dotted lines
the position of said hooked -pulling member on
its forward movement inthe direction of the ar»
row c as it is about to pass over the loop-hold"
_ ing member and
Figure 6 represents a section on line t, t on
The invention consists primarily in the com
Fig. d.
bination of a reciprocating thread-pulling blade
coacting with a holding member consisting of two
plates riveted together and separated at the
' end nearest the needle, whereby in the forward
Iii movement of the pulling blade said blade moves
-
Similar characters indicate like parts through
out the several iigures of the drawing,
In the drawing, Iii represents a bed plate or" a
sewingrmachine supporting a pad ii containing
over the holding member, seizes the thread and
on its return movement pulls a loop of thread
a considerable thickness of _ñuilîy material, said 15
.pad being adapted to be moved over the surface
of the bed plate by any suitable mechanism to
between said two plates which retain the loop
the right of said figure.
thus formed in position 'until the' next stitch is Ü
The sewing machine has a reciprocating and
oscillating needle I2 and a looper I3, said needle 20
20 formed.
.
For the purpose of illustrating the invention. , and looper being actuated in any Well known
one preferred form thereof is illustrated in the
drawing, this form having been found to give
satisfactory and reliable results, although it is
25 to be understood that the various instrumen
organization of these instrumentalities as herein
$0 shown and described except as required by the
l
.
\
iiuffy material and showing mechanism embody
ing the present invention, said mechanism show
ing the loop of thread clamped between the two
v
Figure 2 represents a similar vertical section
showing the hooked thread~pulling blade in po
sition to seize the thread and draw it into a po
sition to be clamped by the holdingmember.
Figure 3Vrepresents a partial plan showing a
45 portion of the presser foot, the loop-holding mem
ber mounted thereon, and a portion of the re
ciprocating hooked thread-pulling member in
position to-be movedv forward in the direction
of the arrow o'. to seize the thread.
50
55
ì
,
are being formed 'therein by said needle ` I2 and
looper I3,
,
Positioned near one endr orf the presser foot I4
is a disk I5 mounted upon a shaft I6 having
secured to one end thereof Va lever I1 tothe 30
outer end of which is pivoted a reciprocating
member I8.
Figure 1 represents a vertical section of -a 'por
tion of a sewing machine adapted to sew together
the oppositeseparated walls oí a pad containing
plates of a loop-holding member.
v
The sewing machine also has a presser foot
I4 bearing upon the top of the pad II and keep
ing the pad under compression while stitches
Atalities of which the invention consists caribe
variously arranged and organized, and the inven
tion is not limited to the precise arrangement and
scope ofthe appended claims.
Of -the drawing- .
manner.
Figure 4 represents a similar View 4showing the
hooked-pulling member moved back in the direc
tion of the arrow b and drawing a loop of thread
between the two thicknesses of the loop-holding
member.
Figure 5 represents a .similar view showing the
'
The member- I8 may be reciprocated in any well
known manner from a crank forming a part of
the sewing machine and during the reciprocation
of the member I8 it imparts a 90° oscillating
movement to the disk i5.
Secured at I9-to the periphery of the disk I5 is
a resilient thread~pulling blade 20, the forward
end of which rests upon the upper face of the
presser foot it.
'
The forward end of the thread-pulling blade
it) is slightly bent upwardly at 2l and is pro
vided with a laterally extending hook 2ï.
d5
The presser foot it is provided with a plurality
of elongated openings 23, said `openings being
parallel to each other and through one of ‘which
the needle I 2 is adapted to pass and then through
the pad Ii to coact with the louper
the required stitch.
and form 50
Beneath the presser foot i 4 is a block 2t having
an elongated rib 25 positioned in another of 'the
openings 23.
‘Screws 2B threaded to the block 2li extend 55
2
2,187,757
through notches 21 in a loop-holding member
consisting of two thin metal plates 28 and 29,
riveted together at 29x, the plate 28 being super
imposed upon the plate 29 and being preferably
of slightly increased thickness.
'I‘hese plates 28 and 29 have rearward exten
sions 38 projecting beyond the hook 22 ofthe
reciprocating thread-pulling blade 20.
As shown in Fig. 3 the upper left hand corner
10 of the extension 38 of the plate 28 is slightly bent
upwardly as at 3 I .
The extension 3D of the lower plate 29 has its
upper left hand corner slightly inclined down
15
wardly as indicated at 32 in Fig. 2 of the drawing.
When the thread-pulling blade 20 is moved
forwardly from the position indicated in Fig. l
of the drawing, the extreme forward end 33 there
of will pass over the rearward extension 30 of
the holding plate 28 into the position indicated
20 in Fig. 2 of the drawing, at which point the hook
22 thereof. will be in position to seize the thread
34 extending downwardly from the needle I2- to
the looper I 3. It is obvious that the movement of
the needle ‘I2 must have such timed relationship
25 to the movement of the blade 20 that the needle
I2 will be in its upper position after coacting with.
looper I3 to form a loop 35 so that on the return
movement of the blade the hook 22 will engage
the thread and draw out the loop 35 and elongate_
30 it as shown in the drawing.
On the return movement of the thread-pulling
blade 28 the hook 22 will engage'with the inclined
portions 3I and 32 of the plates 28 and 29 and will
be drawn between these plates 28 and 29 carry
ing with it the loop 35 as indicated in Figs. 4
and 5 of the drawing..
The loop 35 at this time will be gripped between
the plates 28 and 29 and remain thus gripped
when the thread-pulling blade `20 moves forward
40 in the direction of the arrow c on Fig. 5, this for
ward movement of the blade 28 being in a direc
tion opposite to the rearward movement of the
work being operated upon .during the stitch form
ing operation.
45
g
As soon as the hook 22 disengages from the loop
35 the loop will drop sufiiciently to permit the
forward end 33 of the thread-pulling blade 28 to
pass over the upper plate 28 as indicated in Fig. 3
of the drawing.
50
«
'
As the pad I I is moved toward the rear ofthe
sewing machine preparatory to the formation of
another stitch therein it will pull the loop 35 from
between the plates 28 and 29 and said loop will
be carried along with the said pad I I leaving the
55 plates 28 and 29 free to receive another loop upon
ghe return movement of the thread-pulling mem
er 20.
This thread-pulling member 28 is of spring
ployed in connection with the presser foot lin
order that a plurality of rows of stitches may be
formed simultaneously in the pad I I.
By having a plurality of openings 23 in the
presser foot I4 the loop-holding devices may be
disposed in any desired openings 23 to vary the
spaces between the rows of stitches,- it being
-understood that the other mechanisms coacting
withsaid loop-holding devices must receive simi
10
lar adjustments.
This feature, however, forms no part of the
present inventionand consequently it is deemed
unnecessary to illustrate the same in detail.
The present invention relates wholly to the
novel means whereby elongated loops of thread
may be formed during the formation of the
stitches and whereby each loop is released prior to
the formation of the next stitch.
It must be understood that the needle I2 not
only reciprocates up and down but while in thc 20
material being' operated upon it is adapted to
oscillate, traveling with the material until it
leaves said material when it is moved forward to
its original position preparatory to the formation
of another stitch.
25
'
This oscillation of the needle is effected by
means of a small eccentric.
This oscillation of the needle is necessary as
the material being sewed is so heavy that it can
not be stopped and started as each stitch is 30
formed.
While in the material the needle swings with
said material in the direction said material is
traveling and it will swing in the opposite direc
tion when it has left the material in its upward 35
movement.
'
'
It is believed that the operation and many ad
vantages of the invention will be understood read
ily witho-ut further description.
,
Having described our invention, we claim:
40
1. In a sewing machine for stitching together
the opposite walls of a pad containing a thick
layer of fluffy material and having two cooperat
ing stitch forming devices, a mechanism con
sisting of a ñat reciprocating blade provided at 45
its forward end with a lateral hook to seize the
thread at a point between said devices; means for
moving said blade rearwardly to form an elon
gated loop in said thread; a work support; a
presser foot above said support; and independent 50
means secured to the upper face of said presser
foot for gripping said loop until the next for
ward movement of said blade.
2. In a sewing _machine for stitching together
the opposite walls of a pad containing a thick 55
layer of fluffy material and having two cooper
:ating stitch forming devices, a mechanism con-_
sisting of a flat reciprocating blade provided at
metal and has suiilcient tension to retain it sub _ its forward end with a lateral hook to seize the
thread at a point between said devices; means
stantially in >contact with the upper face of the
curved lpresser foot Il during its reciprocation. for moving said blade rearwardly to form an
elongated loop in said thread; a work support;
By means of the mechanism _herein shown an
elongated loop may be formed in the formation a presser foot above said support; and coacting
of each stitch, the length of the loop being suf- _ flat spring jaws secured to the upper face of said
?cient to take care of the expansion of the pad presser foot'for gripping said loop until the next 65
forward movement of said blade.
as it moves away from the stitch-forming mecha
nism.
‘
By means of the screws 26 and notches 21 the
loop-holding plates 28 and 29 may be adjusted
70 toward and from the thread-pulling blade 20
until said plates and blade are properly positioned
relatively to each other.
'f
The presser foot I4 has a length greater than
the width of the pad II being operated upon and
15 a plurality of stitch-forming mechanisms are em-A
3. In a sewing machine for stitching together
the opposite walls of a pad containing a thick
layer of fluffy material and having two cooper
ating stitch forming devices, a mechanism con 70
sisting of a'work support; a curvedl presser foot
above said support; a iìat reciprocating blade of
spring metal provided at its forward end with a
hook to seize the thread at a point between said
devices, said blade being movable forwardly over 75
.
2,137,757
'the upper face of said presser foot; means for
moving said blade rearwardly to form an elon
gated loop in said thread; and independent
means secured to the upper face of said presser
foot for gripping said loop until >the next for
_ward movement of Said blade.
4. In a sewing machine for stitchingtogether
the opposite walls of a pad containing a thick
layer of fluffy material and having two co
10 operating stitch forming devices, a mechanism
consisting of `a flat flexible reciprocating blade
provided at its forward end with a lateral hook
to seize the thread at a point between said devices,
said hook being. integral with said blade; means
15 for moving saidV blade rearwardly to form an
elongated loop in said thread; a work support;
a presser foot above said support; and independ
ent- means secured to the upper face of _said
presser foot for gripping said loop until the next
20 forward movement of said blade.
_
3
forward movement of said blade, said plates at
their forward ends having oppositely disposedv
inclined faces at a corner thereof forming a
mouth to receive the hook in its rearward move
ment.
.
9. In a sewing machine for stitching together
the opposite walls of a pad containing a thick
layer of fluffy material and having two 4cooper
ating stitch forming devices, a mechanism con
sisting of a flat reciprocating blade of spring 10
metal provided at its forward end with a lateral
hook to seize the thread between said devices;
an oscillating disk to which the rear end of said
blade is secured; means for actuating said disk
to move said blade endwise in -a forward direc
15
tion and to move it rearwardly to form an elon
gated loop in said thread; a work support; a
presser foot above said support; and independent
means secured to said presser foot for gripping.
said elongated loop until the next forward move
ment of said blade.'
5. In a sewing machine for stitching together
10. ln a sewing-machine for stitching together
the opposite walls of a pad containing a thick
the opposite Walls of a. pad containing a thick
layer of ñuify material and having two cooper
ating stitch forming devices, a mechanism con -layer of ñudy material and having two cooperat
25 sisting of a flat reciprocating blade provided at ing stitch forming devices, a mechanism consist
its forward end with a lateral hook to seize the ing of a .flexible ilat reciprocating blade having
thread at a point between- said devices; means its forward end elevated above the body ci the
for moving said blade rearwardly to form an blade and provided with a lateral hook to seize
the thread at a point between said devices; means
i elongated loop in said thread; a work support; a
presser foot above said support ;_ and independent for moving said blade rearwardly to form an elon
means secured to said presser foot for gripping gated loop `in said thread; a work support; a
said loop until the next forward movement of presser foot above said support; independent
said blade, said loop gripping means being ad . means secured to said presser foot for gripping
said loop until the next forward movement of
justable toward and from said hook.
6. In a sewing machine for stitching together - said blade; and means for moving said blade for
the opposite Walls of a pad containing a thick .ward over the top of said loop gripping means.
layer of fluffy material and having two cooper- A ‘ 11'. In a sewing machine for stitching together
the opposite walls ofïa pad containing a thick
Iating stitch forming devices, a mechanism con
' sisting of a dat reciprocating blade provided at ‘ layer of fiuify material and having two cooperat
ing stitch forming devices„a mechanism consist
40 its forward end with a lateral hook to seize the ing of a-iiexible ñat reciprocating blade having its
thread at a point between said devices; means
for moving said blade rearwardly tohuform an
elongated /loop'in‘sa'id thread; a work support;
a presser foot above said support; and means
45 mountedon said ‘presser foot.and'extending over
an intermediate part of said elongated loop and
gripping the same.
f
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dit
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titi
40
forward end elevated above the body of the blade
and provided with a lateral hook to seize the
three. at a point between said devices; means for
me v.og said blade rearwardly to form an elon
45
gated loop- in said thread; a work support; a
presser foot above said support; means mounted
'7. In a sewing machine for stitching together i on said presser foot and having rear extensions
the opposite walls of a pad containing a thick between which said elongated loop is adapted to '
be gripped; and means for moving said blade for 50
50 layer of iluilîy material and having two cooper
wárdly over the top of said gripping extensions
atingestiteh forming devices, a mechanism con
sisting of a fiat reciprocating blade provided at ' thereby releasing the hook from said loop.
12. In a sewing machine _for stitching together
its forward end with a lateral hook to seize the
thread at a point between said devices; means for
55 moving said blade rearwardly to form an elon
gated loop in said thread; a work support; a
presser foot above said support; and two 'thin
plates riveted together and between which said
loop is drawn by said blade for temporarily grip
ping said loop until the next forward movement
of said blade, said plates being mounted on Said
presser foot and adjustable toward and from
the opposite walls of a pad containing a thick
layer of fluiïy material and having two cooperat
ing stitch forming devices‘, a" mechanism consist
55
ing of a flexible flat reciprocating blade having vits
forward end elevated above the body of the blade
and provided with a lateral hook to seize the
thread at a point between said devices; means for
moving said blade rearwardly to form an elon
gated loop in said thread; -a'work support; a »
presser foot above said support; two thin plates
8. In a sewing machine for` stitching together riveted together and between which said -loop is
drawn by said blade for temporarily gripping said
65 the opposite walls of a padcontaining a _thick ‘ loop until the next forward movement of said
layer of ñuffy material and having two cooper
blade; and means for moving said blade for
ating stitch forming devices, a mechanism con
sisting of a iiat reciprocating blade provided at wardly over the top of said plates and releasing
its forward end with a lateral hook to Seize the the loop from said hook.
13.A In a sewing machinefor stitching together
70 thread at a point between said devices; means ` the opposite walls of a pad containing a thick 70
for moving said blade rearwardly toA form an
elongated loop in said thread; a work support; layer of fluiîy material and having two cooperat
ing stitch forming devices, a mechanism consist
a presser foot above said support; and independ
ent means comprising plates secured to said ing of a, fiexible flat reciprocating blade having its
presser foot for gripping said loop until the next forward end elevated above the body of the blade 75
said blade.
`
4
2,137,757
and provided with a lateral hook to seize the
thread at a point between said devices; means for
movinglsaid blade rearwardly to form an elon
gated loop in said thread; a work support; a.
provided at its forward end with a hookY to seize
thereof forming a mouthto receive the hook in
the thread at a point between said devices; an
oscillating disk to which the rear end of said
blade is secured; means for actuating said disk to
move said blade rearwardly to form an elongated
loop in said thread; a work support; a presser
foot above said support; and independent means
secured to said presser foot for gripping inter 10
mediate portions of said elongated loop until the
its rearward movement; and` means whereby said
blade in its forward movement will pass over
the top of said gripping means.
‘
whereby in the forward movement of said blade
it will pass over the top of said gripping means.
presser foot above said support; independent
means comprising plates secured to said presser
foot for gripping an intermediate portion of said
loop until the next forward movement of said
blade, said plates at their forward ends having
10 oppositely disposed inclined faces at a corner
15
ing stitch forming devices, a mechanism consist
ing of a flat reciprocating blade of spring metal
14. In a sewing machine for stitching together
the opposite walls of a pad containing a thick
layer of ñuffy material and having two cooperat
next forward movement of said blade, and means
15
CHARLES T. GOULD.
HERBERT M. BONNEY.'
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