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Патент USA US3082730

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March 26, 1963
YUKIO SANBE
3,082,720
DEVICE FOR SEWING DESIGNS 0N ZIGZAG SEWING MACHINES
Filed April 5, 1960
4 Sheets-Sheet 1
$9125’
INVENTOR
ATTORNEY
March 26, 1963
YUKIO SANBE
3,082,720
DEVICE FOR SEWING DESIGNS 0N ZIGZAG SEWING MACHINES
Filed April 5, 1960
4 Sheets-Sheet 2
IN‘IENTOR
YIJK/O 5A 4/55 _
ATTORNEY
March 26, 1963
YUKIO SANBE
3,032,720
DEVICE FOR SEWING DESIGNS 0N ZIGZAG SEWING MACHINES
Filed April 5, 1960
12y. a
4 Sheets-Sheet 3
12:9‘ 2
INVENTOR
Yuk/,0 ,
5;
ATTORNEY
March 26, 1963
YUKlO SANBE
3,032,720
DEVICE FOR SEWING DESIGNS ON ZIGZAG sawmc MACHINES
Filed April_5, 1960
4 Sheets-Sheet 4
INVENTOR
ATTORNEY
United States Patent 0 "ice
,_
3,082,720
Patented Mar. 26, 1963
2
1
machine arm 1. However, the aforesaid vibrating motion
is imparted by one of the three earns 10* which has been
3,082,720‘
DEVIGE FOR SEWING DESIGNS 0N ZIGZAG
mounted as to be removable on the vertical shaft 8 pro
SEWING MACHINES
vided as to be rotatable in the bed plate 2 of the sewing
machine. As shown in FIGS. 5 and 8, a ratchet wheel 11
which is rotated by the feeding pawls 22 and 22a is car
Yukio Sanbe, 255~4, Inyaku-Machi, Yamagata-shi,
Yamagata-ken, Japan
Filed Apr. 5, 1960, Ser. No. 20,163 ‘~
ried on this vertical shaft 8.
1 Claim. (Cl. 112-102)
These pawls, which are
urged against the wheel 11 with a spring 23, are pivoted
to a slide 21, and the slide 21 is in turn guided by a groove
The present invention relates to the improvements in
the sewing devices for sewing letters, ?gures, designs, etc. 10 20 ?xed in a frame mounted in the machine bed. As
shown in FIGS. 6 and 7, a pin 25a carried on one end of
a bell crank 25 that rocks around a pin 26 pivotally at
tached to the bed plate 2 engages a recess 24 on the top
mounted so as to be attachable to or removable from
side of the slide 21, and a fork 25!) at the other end of
a rotating shaft driven from any driving shaft of a sewing
machine such as that for feeding, and is characterized 15 the bell crank 25 engages a cam 71 provided on an oscil
lating shaft 7t]. As a result of the oscillation of the shaft
in that one of the cams controls through an intermediary
by means of a zigzag sewing machine.
The devices of this invention consists of three cams
of a lever the vibrating amplitude of the needle bar and
shuttle, and the other two cams impart through levers co
70, the bell crank 25 oscillates and thus by means of the
engaged wall 24a of the recess 24 the slide 2.1 repeats the
operating therewith horizontal displacement to the work
stretching frame disposed immediately below the needle
turn by said spring. Hence, by this reciprocating motion
bar on account of the resultant motion produced by these
cams.
movements forward against a tension spring 27 and a re
the aforesaid ratchet wheel 11 is caused to rotate inter
mittently in a clockwise direction in FIG. 8 by means of
the pawls 22 and 22a carried by the slide 21 with the dis
An object of the invention is to provide devices in
tance corresponding to the distance traveled in the afore
which sewing of embroidered ?gures such as letter forms
are automatically accomplished by means of the resultant 25 said reciprocating motion. The stroke of the slide re
ciprocation is determined by the position 29a of an ad
motion from the two cams, which impart to the works the
justing screw 29 provided in a frame 28. The two pawls
desired changes in horizontal displacement, conjointly
22 and 22a which match in thickness the ratchet 11 and
with the changes in the zigzag ‘stitches resulting from
are superposedly disposed, engage said ratchet wheel 11
changes in the amplitude of vibration of the needle bar
30 with a phase difference of a half pitch and impart preci
andtthe shuttle.
sion movements thereto. The shaft 8 of the ratchet wheel
Another object is to provide for making possible the
11 is pivotally supported as to be rotatable in the bed
obtaining of a plurality of embroidery ?gures by changing
plate 2 and a frame 64 secured thereto. To an extension
these three cams with a plurality of other sets of cams
15 to said shaft 8 situated above the bed plate, three cams
which have been provided.
10A, 10, and 10B of suitable pro?le are provided in super
A further object is to provide for making precise the
posed positions (as shown in FIG. 9). Grooves 16, 16
lateral movement of a work-holder in concomitance with
are provided diametrically in a boss 14 that is located
the movement of a plurality of cams by means of two
between the shaft 8 and the extension 15. The upper part
pairs of parallel links acting in a form of two parallelo—
of pins 17, 17, which are inserted in these grooves, are
grams.
?tted into the two holes 13, 13 respectively provided in
The accompanying drawings shown an embodiment of
the aforesaid three cams. And to the tips of the pins
the present invention:
17, 17 two holes of a capping washer 18, which match
FIG. 1 is a side elevational view of the machine;
these pins, are ?tted. Then next thereto at the tip of the
FIG. 2 is a plan view;
extension is screwed a knob 19 which clamps it and the
FIG. 3 shows a partial section and side elevation of
45 three cams. One of the three cams, for example, the
the essential parts according to the invention;
middle one 10 controls the vibration of the needle bar
FIG. 4 is its plan view;
and the lower stitch mechanism, while the top one 10A
FIG. 5 is a plan section on the line V-—V of FIG. 3;
and the bottom one 103 control the lateral movements
FIG. 6 is a vertical section of the driving mechanism
that are imparted to the work holder 46 for determining
for the essential parts;
the ?gure desired. These carns possess respectively suit
FIG. 7 is a vertical section on the line VII-VII of
able pro?les as shown in FIG. 10, and the periphery of
FIG. 6;
the pro?les, as shown in FIG. 11, are milled so that the
FIG. 8 is its plan view;
tips of the levers 30, 31, 32 that follow will not slip while
FIG. 9 is a vertical section of the cams arrangement
of said essential part;
'
FIG. 10 is a perspective view of the set of three cams; 55
FIG. 11 is an enlarged plan view of the partial circum
ference of the cam;
.
making contact with the respective peripheries of the
pro?le.
7
These levers 30, 31, and 32 which are caused to oper
ate as a result of being in engagement with the cams are
provided on a vertical spindle 9 journalled in the bed
plate 2 and the frame 64 (as shown in FIG. 12). The
co-operating with said cams;
FIG. 13 is a perspective view of the main levers; and 60 three levers are of the shapes as shown in FIG. 14. Of
these three, the lever 30 is rotatably provided on the spin
FIG. 14 shows perspective views of the levers co-oper
dle 9 by means of bearing hole 30d with its tip 30a mak
ating with said cams.
,
ing contact with the periphery 161 of the aforesaid cam
As shown in FIG. 1, the zigzag sewing machine to
10. The other end 3tle through the intermediary of a
which this invention is applied is the same as the conven
connecting bar 58 is coupled to a crank piece 59 at the
tional zigzag sewing machine in that it has a mechanism
bottom end of an upright shaft 7, the top end of which
which, as a result of the rotation of the driving pulley 3,
FIG. 12 is a perspective view of the lever mechanism
reciprocates the needle bar 4 vertically and at the same
time vibrates it laterally (not illustrated), and a mecha
nism 5 which drives the lower stitch mechanism as well
as vibrates it in correspondence with the vibration of the
needle bar, and moreover is provided for adjusting the
amplitude of the vibration with a knob 6 mounted on the
extends as far up as the inside of the machine arm. An
arm 60 which is attached to the top‘ end of the upright
shaft 7 through the intermediary of a member 61 actu
ates the mechanism which imparts vibration to the needle
‘bar for performing zigzag sewing. And the fact that the
amplitude is manually adjustable by means of a handle 6
3
3,082,720
through the intermediary of a lever 62 is similar to that
of the conventional zigzag machine. By means of the
above mechanism, the width of the zigzag stitches made
by the sewing needle is automatically varied in accord
ance with the con?gurations of the pro?le of the cam 19.
Next, inasmuch as the lever 31 whose tip 3111 makes
contact with the periphery 101A of the cam 10A is
4
What is claimed is:
A device for use in combination with a zigzag sewing
machine for the sewing of embroidered ?gures, said sew
ing machine having a needle bar and a bed plate, said
device comprising a vertical shaft depending ‘from and
rotatably mounted in said bed plate, means to rotate said
vertical shaft, a vertical shaft extension ?xed to said ver
secured to the vertical spindle 9, it is actuated by the
tical shaft ‘for rotation therewith and extending above
changes in the pro?le of the rotating cam 10A. As a
result, the lever 31 actuates in conjunction with the shaft 10 said bed plate, three cams removably mounted on and
rotated with said vertical shaft extension, each of said
9 an arm 40 secured thereto, thereby causing changing
cams having a camming surface, three levers, each hav
movements to take place in a link 37 through a member
ing a tip in cam-following engagement with one of said
41 which is coupled at its end to said link 37 by means
camming surfaces, a vertical spindle rotatably mounted
of a linkage pin 42, On the other hand, the lever 32,
in said bed plate, one of said levers being rotatably
which makes contact with the periphery 191B of the cam
1013, being secured to a sleeve 34 journaled rotatably on
the vertical spindle 9 rotates a lever 33 provided in one
body with said sleeve, and through a link 37 coupled with
a pin 36 to said lever 33 actuates a horizontal actuating
bar connected to said link 37 with a pin 38. Hence, the
movements that are imparted ‘to the actuating bar 43 are
the resultants of the movement of the member 41 result
ing from the cam 10A through the link 37 and the move
ment of the lever 33 resulting from the cam 1013. To
the actuating bar 43, a pair of parallel links 44 and 45
are attached which are pivoted at their other ends to a
movable disc 54. This disc, in turn is connected with a
disc 57 ?xed to the machine bed plate with another pair
of parallel links 55 and 56 at right angle with the ?rst
pair of parallel links. By means of these parallel links,
the longitudinal movements and the lateral movements
of the aforesaid horizontal actuating bar-—the former of
which movements are controlled by the cam 10A and the
latter of which are controlled by the cam 10B-are trans—
mitted exactly parallel to the circular holder 46 of the
works such as fabrics, and the extended portion 47
thereof. As shown in FIG. 12, the circular holder 46 is
mounted on said vertical spindle and having an end re
mote from its tip, a mechanism for imparting vibration
to said needle bar for performing zigzag sewing, means
connecting said end of said one lever to said mechanism
whereby the width of the zigzag stitches may be auto
matically varied in accordance vwith the pro?le of the
camming surface of one of said cams, a second of said
levers being ?xed to said vertical spindle at an end re
mote from its tip, whereby said vertical spindle is 1'0
tated by rotation of said second lever, a ?rst arm having
two ends, one end of said ?rst arm ‘being ?xed to said
vertical spindle for rotation therewith, the third of said
levers being ?xed to a sleeve at an end remote from its
tip, said sleeve being rotatably mounted on said vertical
spindle, a second arm having two ends, one end of said
second arm being ?xed to said sleeve, a link having two
ends, one end of said link being pivotally connected to
the other end of said ?rst arm, the other end of said
link being pivotally connected to the other end of said
second arm, a horizontal actuating bar having two ends,
a work holder having an extension, one end of said hori
zontal actuating bar being pivotally connected to said
other end of said link, the other end of said horizontal
actuating bar being ?xed to said extension of said work
holder, a first pair of parallel links, each having two ends,
mounted as to be adjustable with respect to its relative
position by means of a groove 48 provided in the ex
tended portion 47 and an adjusting screw 49. The works 40
one end of each of said ?rst pair of parallel links being
such as fabrics of shirts, which are held in the above
pivotally connected to said horizontal actuating bar at a
holder 46 by means of a wire ring 50 attached to the in
ternal side of the holder by spring pressure, are imparted
lateral movements, a composite of that resulting from
cams 10A and 108, as well as conjointly changes in the
amplitude of the vibration of the needle bar and lower
stitch mechanism, whereby the ?gures in accordance with
point remote from said work holder, a movable disk, the
other end of each of said ?rst pair of parallel links be—
ing pivotally connected to said movable disk, a second
pair of parallel links, each having two ends, said second
pair of parallel links being disposed at right angles to
The 51 of
said ?rst pair of parallel links, one end of each of said
FIG. 12 is that which is compressed with the hand for
second pair of parallel links being pivotally connected
inserting and removing the wire ring 50, and 52 and 53
to said movable disk, a stationary disk ?xed to said bed
plate, the other end of each of said second pair of par
the desired stitches are sewn on the fabrics.
is the supporter for the works such as shirts, etc.
A plurality of sets of the aforesaid cams 10A and 10B
are readied to meet the requirements of the various types
of forms of the aforementioned ?gures and letters. A
allel links being pivotally connected to said stationary
disk, whereby the longitudinal and lateral movements of
said work holder may be automatically varied in ac
plurality of earns 10 are also provided for to meet the
cordance with the pro?le of the camming surfaces of
desired variety in the changes in the zigzag stitches that
the other two cams.
are needed. These may all be changed, as required, by
merely loosening of the knob 19 shown in FIG. 9. And
in this instance, for the purpose of turning the levers 30,
31, and 32 outwards out of the way, each of the levers 60
are respectively provided with pull pieces 3%, 31b, and
32b projecting therefrom.
Having fully described a preferred embodiment of this
invention, it will be obvious that the same may be varied
in detail without departing from the spirit of the invention 65
as set forth in the appended claim.
References Cited in the ?le of this patent
UNITED STATES PATENTS
813,122
994,033
2,653,557
2,902,956
2,932,267
2,939,414
Thrautmann _________ __ Feb. 20,
Richter _____________ __ May 30,
Robert et al. _________ __ Sept. 29,
Broedner _____________ __ Sept. 8,
Nickerson __________ __ Apr. 12,
Slinn ________________ __ June 7,
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1960
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