u
Third
Stitch.
On
the
inside vibration,
the
piercer, followed
by the needles with their points housed in its grooves, descends
again into
the
opening for
the
third
stitch. After the piercer and
needles rise sufficiently clear of the material the feed dog rises and
moves
the
material
forward
for
the
needles
to
work
the
first
stitch
in the next opening, binding
the
intervening threads of the
material
into
a
bar
(or
spoke).
Each
set
of
three
stitches
for
each
opening
is
formed
in
the
same
manner.
The
piercer
usually
set
in
the
machine
at
the
factory is No.
213826.
Piercer
No.
213825 is finer,
for
extra
fine
work,
silks,
etc.
The
auxiliary piercer is No.
234739.
PIERCERS
AND
AUXILIARY
PIERCERS
USED
IN
MACHINE
72w19
ALSO
DIAGRAMS
SHOWING
SHAPES
213825
213826
234739
213828
213830
234737
234738
E6I41
Fig.
9
The
above
diagrams
show
exact
sizes
and
shapes
of
punctures.
TO
COMMENCE
SEWING
With
the
left
hand
take
hold
of
the
needle
threads,
leaving
them
slack
between
the
hand
and
the
needles,
turn
the
balance
wheel
toward
you until
the
needles move down
and
up again
to their highest position, thus catching the under threads, draw
up
the
needle threads
and
the
under
threads with
them
through
the
slots
in
the
throat
plate
and
lay
the
four
threads
back
under
neath
the
presser
foot;
then
place
the
material
beneath
the
needles,
lower
the
presser
foot
upon
it,
turn
the
balance
wheel
toward
you,
and
commence
to
sew.
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