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The
spool stopper operates
on the way
to the cocked
point of the wind lever.
This
point of the lever varies
according
to the radius increase of the take up spool
due to the film taken up,
and the rest of the
wind up stroke is utilized only for cocking
the shutter.
Friction shaft system
Proper length of the film to be transported is determined by the
transport
control wheels, spool stopper, friction shaft system
and others.
The friction shaft system is illustrated in Fig. 2-9.
On a free
stop ratchet,
rotation of the friction shaft is transmitted
to the take up
claw by the friction spring,
since the spring tightens gra-
sping of the rotating
shaft.
:
When
the tooth of the spool stopper
engages
the stop ratchet,
the fri-
ction spring becomes
loosen according to the rotation of the shaft,
resu-
lting in the film transport cut-off,
Anti-reverse
spring beneath the transport
3rd gear, turns the fric-
tion shaft backward
slightly through the transport
gears when the wind
lever returns after cocking the shutter.
This slight movement
of the fric-
tion shaft is absolutely necessary
for the engaged
spool stopper tooth (
with the stop ratchet) to escape
from
the ratchet for the next film trans-
port.
Otherwise,
a pressure
due to reforming
force
of the friction sp-
ring will remain
between
the tooth and the ratchet after completing
the
film transport and the shutter
cocking, causing a film-transport malfunc-
tion.for the next frame.
TRANSPORT
3rd GEAR
ANTI-REVERSE SPRING
STOP RATCHET
FRICTION
SPRING AND SHAFT
TAKE UP
Sey
Fig.2-9
DIRECTION
q
TAKE UP CLAW
Auto-loading
system
In order to transport the film without cocking the shutter, before the
first frame
is ready for exposure
and also after the exposure
counter
rea-
ches the figure set on the frame No. control dial, claw clutch is provided
on the main gear.
Shift lever can switch the claw clutch to "operational"
or 'non-operational"',
and the lever is actuated by both the shift actuator
cam through the shift pawl and auto re-set coupler lever.
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