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toward the rear of the machine. When the reverse lever is
moved to the rear, a spring link rotates the reversing latch
which is riveted'to the reversing plate. The latch is now po-
sitioned in the path of the ribbon feed bellcrank. During its
next feed stroke, the bellcrank strikes the reversing latch and
forces the reversing plate to its upper position. The pawls are
thus engaged with the empty spool and are simultaneously dis-
engaged from the full spool by the action of the ribbon reverse
rod.
In order to expedite replacing a ribbon, the typewriter is e-
quipped with an automatic ribbon rewind mechanism. This
feature utilized the ribbon feed cam as a repeating cam. The
ribbon rewind lever, in front of the left ribbon spool, may be
latched down to rotate the cam re lease lever and a Ilow the cam
to repeat. The rewind lever wi II remain in the latched position
until the ribbon has rewound completely. The action of the
ribbon reverse rod actuates the ribbon rewind trip lever which
automatically unlatches the ribbon rewind lever (Fig. 72).
Carbon Ribbon Attachment
The carbon ribbon attachment utilizes the same ribbon lift
mechanism as the fabric ribbon, except that the ribbon lift
guide is designed to lift and feed a 5/16" wide carbon paper
ribbon. The ribbon feed mechanism uses the same cam and
shaft arrangement but only has one feed link which is attached
to the left lug on the shaft of the ribbon lift boil assembly. Two
magazines are mounted to the front typewriter case. The spool
of ribbon is mounted on the hub of the right magazine plate.
The ribbon is threaded through the ribbon guides to the left
magazine plate.
Th~
ribbon is fed-by a pair of geared rubber
Nylon Feed Ratchet
Ribbon Rewind Lever
Left Side Frame
Figure 72. Ribbon Rewind Mechanism
rollers (Fig. 73). The front, or feed roller, is moynted on a
shaft that also has a nylon feed ratchet mounted on if. The
feed ratchet, ca lied an escapement whee I, is rotated by a
feed pawl. The feed pawl is powered by the same ribbon feed
cam lug on the shaft and feed link arrangement previously
described. The feed pawl may be disengaged from the nylon
feed ratchet by pull ing forward on the ribbon feed throw-out
lever. This lever slides on two rivets mounted to the left hand
magazine plate. It is desirable to use this throw-out lever
when using the fabric ribbon feed mechanism.
Figure 73. Carbon Ribbon Mechanism
35
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