Figure 92
Figure 93
MAGNET
BRIDGE
X-CONTACT
CLOSING
LEVER
OPENING-BLADE
DRIVE
SPRING
timing cam as shown in Fig. 91.
You can now lift out the magnet
bridge, Fig. 92. Also lift out the opening-
blade drive spring, Fig, 93. The longer
end of the opening-blade drive spring
goes down and hooks against a tab on
the opening-blade driving lever. Leave the
closing-blade drive spring in place.
To remove the opening-blade latch,
first disconnect its spring from the tab on
the X-contact closing lever, Fig. 93. Then
lift the opening-blade latch up and off its
post. The spring stays on the opening-
blade latch.
At this point, you can more easily
observe the operation of the blade
assemblies. Be careful, though, that you
don't lift up the blade-driving levers. If
you do, the pins on the other sides of the
blade-driving levers will come out of the
slots in the blade sets. Then, if the in
dividual blades shift in position, you'll
have to realign the slots before you can
replace the blade-driving levers.
Fig. 94 and Fig. 95 show how the
blade-driving levers operate. As you cock
the shutter, the shutter-cocking lever
comes against a roller on the opening-
blade driving lever (this roller is the part
that may be sheared off if the shutter has
been forced). The shutter-cocking lever
now pushes up the opening-blade driving
lever. In turn, the opening-blade driving
lever pushes up the closing-blade driving
lever. With the shutter cocked, the
opening-blade latch, Fig. 93, engages the
opening-blade driving lever and the
closing-blade latch, Fig. 95, engages the
closing-blade driving lever.
Figure 94
Figure 95
I
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