Singer 328 - Drum

Punch Card
Scanning
Finger
in
a hole
of
punch
Card
Scanning
Finger
not
in
a
hole
of
Punch
Card
Touch Lever
ri9. 9
3-3 Dr\rm:
The
Drum reaals
anal
menorizes
the
paLtern
from
the
punch
Card
transmitted
by tile
Touch
Levers,
on
the
pattern
Unit,
and
according
to
its memory,
selects
the
appropriate
neealles.
The Drum
can only memorize
a
pattern
r,lich_requires
up
to 24
needles. The
range
of needle
selection
availa6le
frorn-
a
Punch
Card is
from 2
to 24
stitches.
those
louch
Levers remaining
in
a
lower positj-on,
hit respe_
ctiveLy
the
upper
parts
of
their
corresponding
Drun
pieces
Iocated
in
the Drun
Unit, Hhich
brings
ibout
i .on.r"*_concav
condition
atound the
Dnrm.
Drum Unit:
The Drum
Unit reads
the
pattern,
tlansmitteal
Levers
of the Pattern
Unit,
memorizes
it
and
needles accordingly.
by
the Touch
then selects
the