Singer 321 KNITTER - Page 13

9
III
-c-1 DRUM UNIT
Drum
Unit reads the
patterns
transmitted by touch
levers of pattern
unit, and
memorizes it,
and then selects
the needles
according to
the memory.
III
-c-2 Main Drum
Main
Drum transmits to Sub
Drum the patterns
registered by touch
lever.
III -c-3
Sub Drum
Sub Drum memorizes the
patterns transmitted from Main Drum, and selects
the needles according to the
memory.
Touch Lever
(Scanning Finger not
in the hole of a punched
card) Touch Lever (Scanning Finger in
the hole of a
punched Card)
Punched
Card
Scanning Finger
Fig. 10
Sub Drum
Piece
Main Drum
Piece
The tip of a Touch Lever which has been lowered
strikes and
pushes the
upper
part of a Drum Piece inside Drum Unit. This concavo-convex
situation is
called
"MEMORIZING"