Paper Feed And Release Me:tchanism - IBM Selectric I/O Manual Of Instruction

Last Column Contact - (Early)
This contact is located on the left side of the machine and
is transferred by the contact actuating arm attached to the
bell-ringer bail (Fig. 184). The bell-ringer bail is located
across the machine just in front of the margin rack. The bell-
ringer bellcrank pivoted on the right margin stop is contacted
by the line-lock bracket attached to the front of the carrier
(Fig. 185).
As
the carrier moves to the right, the bellcrank
pivots causing the bell-ringer bail to rotate forward. The
contact-actuating arm at the left end of the bai I operates the
contact.
Bell-Ringer Bail
Last -Col urnn Contact
FIGURE 184. Last Column Contact (Early)
FIGURE 185. Actuating The Last-Colulmn Contact
Last Column Contact - (Late)
This mechanism operates in the same manner as the old style.
The major difference is the use of a snap-action switch in
place of contacts (Fig. 186).
73
Contact
alP
Contact
Note:
The Backup Spring Should Be
Formed to Touch the Actuator
With All Parts At Rest
(Card er Away From the
R. H. Margin)
FIGURE 186. Last Column Contact (Late)
PAPER FEED AND RELEASE MECHANISMS
Paper Feed
The purpose of the paper feed mechanism is to control both
the horizontal and the vertical positions of the paper in the
machine and to feed the paper vertically.
The paper feed operates by pressing the paper tightly against
the platen so that it must move as the platen rotates. The
paper is held against the platen by a front and rear feed roll
assembly located beneath the platen (Fig. 187). Each feed
roll assembly contains four rubber rollers equally spaced a-
long the feed roll shaft and molded to the shaft.
Feed Roll
Front Feed Roll Arm
Platen
FIGURE 187. Paper Feed Mechanism