IBM Selectric I/O Manual Of Instruction page 91

Bellringer Bail
FIGURE 181 . Line Lock Mechanism (Late Style)
Bell
The bell is located on the left side of the keyboard section
and is rung by the be II clapper attached to a be Ilcrank above
the bell (Fig. 182). The bell clapper bellcrank is operated
by the action of the bellringer bail located across the mach-
ine just in front of the margin rack. The bellringer bellcrank
pivoted on the right margin stop is contacted by the line lock
bracket attached to the front of the carri er (Fig. 178). As
the carrier moves to the right, the bellcrank pivots causing
the bellringer bail to rotate forward. A small lever at the
left end of the bail operates the bell clapper into the active
position (Fig. 182). Further rotation of the bail causes the
bail lever to slip off the bell clapper bellcrank allowing it to
restore. An arm of the bellcrank contacts the bell mounting
stud causing the bellcrank to stop suddenly. The momentum
of the bell clapper causes it to spring over and strike the
bell one time. When the bellringer bail is allowed to restore,
the bai I lever resets above the bell clapper bellcrank ready
for the next operati on.
Bell Clapper Bellcrank
f;;.
Bell
FIGURE 182. Bell Ringer Mechanism
72
Margin Release
The purpose of the margin release m.echanism is. t?
a~
low typ-
ing on either margin of the paper without
reposltlo~lng
the
margin stops. The margin release operates by rotating the
margin rack so that the margin stops move upward out of the
path of the line lock bracket on the carrier.
The margin release keylever pivots at the left side of the
keyboard (Fig. 183). A stud at the rear of the
keylev~r
op-
erates in a slot in the margin release lever. The margin re-
lease lever is attached to the margin rack. Depression of
the keylever causes the margin release lever to be raised.
This action rotates the margin rack raising the rear of the
margin stops. A lug on the left end of the margin rack
r~­
mains in the path of the carrier return if it is operated with
the margin release keylever depressed.
An extensi on spring from the keylever down to a lug on the
keyboard side frame restores the mechanism ard holds it in
the rest positi on.
Margin Release Lever
Final Margin Stop
Margin Rack
Margin Release Keylever
FIGURE 183. Margin Release Mechanism