Super-40 Shutter - Kodak Pageant Manual

Kodak Super-40
The KODAK PAGEANT Arc Projector is
equipped with the SUPER-40 Shutter
(Figure 10), which provides 40 per­
cent more screen illumination in the
2-blade position than it does in the
3-blade position.
Action of the SuPER-40 Shutter
At the 3-blade position (for silent
speed), there are a minimum of
forty-eight light interruptions per
second. This position is maintained
by spring tension. The tension coun­
teracts the centrifugal force exerted
by a weight that is linked to the two
movable blades.
When the speed selector is moved
to SOUND, the additional centrifugal
force that results from the faster
speed of the shutter overcomes the
spring tension. The movable blades
rotate on their axis and overlap in a
SUPER-40 Shutter In 2-Blade Position
12
Shutter
position opposite the fi x ed blade. Now
the shutter will operate in the 2-blade
position, giving the same light inter­
ruptions per second, but with 40 per­
cent more screen illumination.
the SUPER-40 Shutter
Sound Speed-If
in the 2-blade position provides too
much illumination, it can be locked in
the 3-blade position. When the projec­
tor is operated at sound speed, the
shutter will automatically shift (if
not locked) from the 3-blade position
to e 2-blade position.
ilent Speed-The
will remain in the 3-blade position if
the projector is started in silent
speed. If the projector is started in
sound speed and then shifted to silent
speed, the shutter cannot return to
the 3-blade position unless the motor
is stopped momentarily.
FIGURE 10
SUPER-40 Shutter in 3-Blade Position
To Lock the SuPER-40 Shutter
in
the 3-Blade Position:
Stop the projector; disconnect the
power cord; loosen the SCREW on the
LAMPHOUSE COVER (Figure 11); re­
move the cover. Turn the trial thread
knob until the SHUTTER LOCK (Figure
12) is visible. Hold the trial thread
knob to prevent rotation of the shut­
ter and, using a screwdriver or simi­
lar object, push the shutter lock down
as far as it will go. Replace the lamp­
house cover and tighten the screw. To
unlock the shutter, proceed as above,

SUPER-40 Shutter

except that the shutter lock must be
moved up as far as it will go.
FIGURE 11
LAMPHOUSE
COVER