Singer 321 KNITTER - Page 12

8
Punched Card
Fig. 9
III -c Drum
Scanning Finger
Touch
Lever
(Scanning
Finger in a
hole
of
Punched Card)
Touch Lever
(Scanning
Finger
not in
a hole
of
Punched
Card)
Under
Lever
Drum reads and
memorizes the
pattern on a punched card
conveyed by
Touch Lever in
Pattern Unit and
according to
its memory,
gives the
order to select needles.
Drum can
memorize a
pattern requiring up
to 24 needles.
The range of
needle selection
available from
a punched card
is
from two stitches to
24 stitches.
Some of the
tips of Touch
Levers
staying in a lower
position than
others
hit
respectively the
upper parts of
their
corresponding
Drum
Pieces
located in Drum
Unit, which brings
about convex
-concave
condition
around the lower
part of Drum.