HOW TO USE YOUR
LONG SHUTTLE MANUAL
Ii SEWING MACHINE
4çJ
MODEL
NO.768
INDEX
Page No.
Adjusting Tensions 12
[ Basting
Fastening a Seam
15
15
Li Head Parts Identification 3
Needle and Thread Table 4
Oiling Machine 16
Placement of Needle 4
Picking Up Bobbin Thread 10
Regulating Length of Stitch 11
Removing Work 14
Reverse Stitching 15
Starting to Sew 14
Threading Upper Machine 9
Threading the Shuttle 8
Turning a Corner 14
Winding the Bobbin 5
What To Do 20
Zigzag Sewing And Pattern Formation 17
Zigzag Formation 18
HEAD PARTS INDENTIFICATION
1. SpoolPin. 14. Stitch Regulator Adjusting Screw.
2. Upper Arm Thread Guide. 15. Lock Screw for Indicator.
3. Tension Assembly. 16. Lock Screw for Indicator.
4. Thread Take-Up Spring. 17. Zigzag Width Regulating Lever.
I 5.
6.
‘7.
Take-Up Lever.
Face Plate Thread Guide.
Needle Thread Guide.
18.
19.
20.
Bobbin Winder. Friction Ring.
Bobbin Winder.
Bobbin Winder Thread Guide.
I 8. Needle Plate.
9. Shuttle Cover Plate.
10. Presser Foot.
21. Stitch Regulating Plate.
22. Face Plate.
23. Thread Take-Up Cover.
11. Presser Regulator. 24. Needle Clump.
12. Hand Wheel. 25. Needle Clamp.
13. Stitch Regulating Lever. 26. Thread Cutter.
NEEDLE AND THREAD TABLE PLACEMENT OF NEEDLE
Raise take-up lever to its highest posi
tion by turning hand wheel toward you.
Needle Thread Fabrics Loosen needle clamp screw.
Size Size Hold needle so that the flat side is faced
to needle bar, slip blunt end of needle
9 100 to 150 Cotton Very Fine Thin Material,
00 000 & 00 Silk Lace and All Delicate as far as it will go into needle clamp.
Twist Fabrics Tighten needle into place with clamp
screw.
11 80—100 Cotton Summer Dresses.
0 0 Silk Twist Children’s Clothing
Corsets and Cloaks
14 60—80 Cotton General Household Sewing,
1 A & B Silk Twist Silk and Cotton Dresses.
Draperies. Flat
side
16 40—60 Cotton Heavy Damasks, faces
9 C Silk Twist Musline etc. to
needle
bar.
18 30—40 Cotton Work and Sport Clothing
3 D Silk Twist Furniture Covers etc.
19 24—30 Cotton Heaviest Material,
4 E Silk Twist Sacks etc.
4
WINDING THE BOBBIN
IEEDLE
highest posi
toward you.
0 0
Place thread on Draw thread thru
v. s4J
spool pin and draw guide on bobbin
side is faced thru guide
—
winder.
I
d of needle
ed1e clamp.
with clamp
0 0
na
I/i
0 0
4f
Insert bobbin in
bobbin winder by
pulling out knob.
- —-7
Lift bobbn wnider so
that rubber ring touches
hand wheel. Start ma
chine and when bobbin
is full. stop. -__j
:r
0
Pres3 bobbin winder down.
away from hand wheel. cut off
the end of thread left exposed.
Tighten clutch knob and re
move bobbin. Machine will be
ready for sewing.
Do not wind too fuU or the bobbin
will riot rOcte creely n the hutde.
a
REMOVING SHUTTLE FROM MACHINE
To remove the shuttle from the shuttle
arrier, open the front shuttle slide
and turn hand wheel of machine
slowly towards you until the shuttle is
in full view. Push the shuttle lever
sharply downwards and the shuttle will
be raised and easily removed as shown
in Figure 4. Hold it with the open end
downwards and the bobbin will fall out.
To replace bobbin, Place the shuttle
between the thumb and fingers of the
left hand with the pointed end toward
you and tension spring uppermost.
Rg. t
THREADING THE SHUTTLE
Take the bobbin in the right Place the shuttle in its carrier so that the
hand with the thread going point is toward you and ter.sion spring
from left to right.
uppermost and lay the free end of the thread
Leave about three inches of
thread hanging. in the upper end of the shuttle slide as
Push the bobbin into the barrel shown in Fig. 6.
of the shuttle.
While holding shuttle in your
left hand pull thread into slot
Fig. 5 and all the way towards
point.
Pull thread to right back from
point and under spring, then
to left and back. Leave about
three inches of thread hanging
from the shuttle.
Pç. 6
WIIPiiPJ
THREADING UPPER MACHINE
1. Place the spool of thread on the spool
at the
pin.
spring
2. And guide the thread through the
thread
lide as thread guide.
3. Then downward from right to left
between the tension discs.
4. Under the hook of the check spring.
5. Through the take-up lever.
6. Behind the thread guide.
7. Behind the thread guide.
8. Finally through the needle eye, from
front to back, leaving about three -o
inches of thread extending.
Pg. 7
9
PICKING UP BOBBIN THREAD
Before starting to sew, raise presser foot lever.
‘1
Hold needle thread loosely in left hand and
rotate hand wheel toward you one complete turn.
Bring bobbin thread up by pulling thread.
Place both threads back under presser foot.
Rg. 8
I
REGULATING LENGTH OF STITCH
The forward and reverse movements of machine are ac- 1
complished by the regulation of the stitch regulator 0
lever. The lower the lever is placed the longer the
stitch. As the lever is raised, the stitch becomes smaller,
until at about the midway point the direction of stitching
changes to reverse, and as the lever continues to be F
raised, the stitches become larger and larger.
Number 4 is the longest stitch and number 1 is the
shortest stitch. When a desired length is obtained, G
tighten the stop thumb screw in Fig. 9.
9- 9
Recommended Stitch Lengths.
1—2 For Most Light Weight Fabrics
2—3 For Medium Weight Fabrics
3—4 For Heavy Weight Fabrics
___________ ______ _____
ADJUSTING TENSIONS
A perfect stitch will have threads locked between the
two layers of fabric with no loops on top or bottom.
;g. to
PROBLEM REMEDY
f
thread too tight
Upper
Decrease Tension
i
•
9
ç:
Upper thread too loose
0 Increase Tension
Fin. 2
2
When stitching is unsatisfactory However, if stitch is satisfactory,
as in figures 11 and 12, adjust as in figure 10 and seam is badly
the upper thread tension. Lower puckerd, the cause may be tight
thread tension is preset and rarely tensions and both upper and lower
requires adjustment for general may be adjusted.
sewing. When adjusting the tension on the
shuttle, adjust the screw a half
turn at a time with a screwdriver.
INCREASE TENSION DECREASE TENSION
Turn C1cckwse. Turn Counter
Clockwise
g. 3 .
9
F t
Starting To Sew Removing Work
When machine is threaded, do not operate Be sure take-up lever is at its highest
it without having material under the presser position. Raise presser foot and draw the
foot. material away towards the back of the
Place material under presser foot, lower machine, at the same time pulling it slightly
presser foot lever. Insert needle into outwards to the left. Be sure upper thread
material by turning hand wheel toward you. is in presser foot slot to avoid bending
As the material feeds automatically, it is needle. Leave the ends of the thread a few.
sufficient merely to guide the fabric gently inches long under the presser foot. Once
by hand. Do not try to help the feeding you have finished working, care should be
of the work by pulling the material as this taken to keep the presser foot raised so that
may bend the needle. When passing over the feed dogs will not be damaged.
thick parts or cross seems, sew slowly and Turning a Corner
turn the hand wheel carefully by hand. 1. Stop the machine while needle is still in
the material.
2. Raise the presser foot and turn the
fabric using the needle as a pivot.
3. Lower the presser foot and resume
sewing.
‘4
BASTING FASTENING A SEAM
For accomplishing quicker, more even and The following method of fastening a seam
firmer basting, we suggest you regulate the is often called “back tacking.”
machine in the following manner: Set stitch Lower needle into fabric ‘i inch from
indicator at No. 4 for the longest possible beginning of seam.
stitch. Basting is easily removed by pulling Lower presser foot.
bottom thread. Raise stitch regulator lever up until it
stops. Stitch in reverse until needle
reaches beginning of seam.
REVERSE STITCHING Lower stitch regulator lever and corn
To sew in reverse, stop sewing, more stitch plate seam.
regulator lever up until it stops. Reverse When end of seam is reached, sew in
stitching will be the same size as forward reverse inch.
stitching. Remove material and cut thread on
cutter.
‘5
OILING MACHINE
I I 11
Tilt machine head back to oil points indi
cated on under side of machine head.
Oil machine at points indicated. Use only
one drop of oil at each point. Moderate
use requires only periodic oiling.
gig. 5
6
ZIGZAG SEWING AND PATTERN FORMATION
Your zigzag sewing machine, by virture of its For the purpose of reverting to a previously used
design, permits you to do zigzag sewing and width of zigzag stitch after having done some
numerous other kinds of work requiring a similar straight sewing or for special types of work such
stitch. The controller for the zigzag stitch are as sewing buttons or making tacks, indicator B
located on the arm of the machine. Notice lever and C will be found useful. These indicators
“A” which adjusts the width of the zigzag seam. serve as the stoppers for lever A. To set “B
For ordinary straight sewing this lever must be (“ C “), loosen lock screw “D (“ E “), turning
“
set to the left of marking of straight stitch seam it to the left. You then will be able to slide same
on the zigzag plate. By moving this lever gradually sideways which, at the same time, moves indicator
to the right, the machine will sew a zigzag seam “B” (“ C “) to the desired marking. Tighten
of increasing width as indicated on the plate. lock screw D”
“ ‘ E “) by turning it to the right.
Thus, when you want to alternate between a
narrow and wide zigzag stitch, you used both
indicators “B” and “C”. You will find this
feature especially convenient when making button
holes.
ZIGZAG FORMATION
Stitch regulating Lever Position Zigzag Regulating Lever
4—3 3-2 2—1 Position and its description.
Straight stitch.
2. The smallest width, zigzag stitch.
Zigzag small width
Zigzag medium width
The largest width, zigzag stitch.
By combining the zigzag regulator and stitch regulating lever, you can sew many varied
patterns as listed belows:
8
By using two needle, you can saw fancy patterns as follows:
Button hole, Set stitch regulator at 1, and zigzag
regulator at small width and stitch
for button size, then stop the ma
chine, and move zigzag lever to the
largest width and stitch 3—4 times,
turn the cloth to the opposite direc
tion and set zigzag lever to small
width again, to stitch to the starting
point of the button hole. When
d belows:
you come to the starting point, set
zigzag lever to the largest width
again and stitch 3—4 times.
===
‘9
WHAT TO DO
PPQBLM
1 PROBABLE CAUS& R6MOY
Replace with new needle, Page 4.
Skipped Crooked needle
stitches Incorrect needle size See peg. 4
Needle rubbing presser Foot Loosen screw that Fastens Foot to bar and adjust
proper position.
(Needle should b. a trifle closer to right side of
needle hole.)
Breaking Wrong or crooked needle See page 4.
threads Needle hole chocked with threads Pull toreads from under side of plate with screwdriver
or remove plate end clean.
Improper threeding See page 9.
Top tension too tight See page 2.
Needle rubbing presser Foot See Skipped stitches” above.
Breaking Pulling materiel when sewing Guide, don’t pull.
Needles Needle wrong size or incorrectly set See page 4.
Needle rubbing presser Foot See Skipped stitches” above.
Puckering 0
f Tension not in balance or too tight See pages 12, 3.
Pabrics Blunt needle Change needles, see page 4.
Presser Foot loose in holder Tighten
Loose stiching Tension too loose . . See pages 2, 3.
either top or bottom or both.
Machine Needs oiling See page 6.
running hard
20
udr’ U! PaW!d
