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Transport
control wheels
First
Transport control wheels (t oothed wheel) consist of an upper wheel
(wheel B) and a base wheel (wheel A).
Wheel A is fixed to the counter
dial shaft and rotates
with it.
Wheel
B rotates
about the shaft within an
angle equivalent
to about
one-pitch
of the wheel A,
and a small
tension
spring is connected
between
the wheelsA
and B.
The wheel
B stops block-
ing the space
of the wheel
A with its teeth.
Refer
to Fig. 2-4.
As the selector
gears
rotate
for shutter
cocking,
the lip of the spo-
ol stopper
is pushed against the circumference
of the wheels
by spring.
However,
the lip can not engage with the wheel A,
as diturbed by one of
the teeth of the wheel B,until the next
space
of the wheel A reaches
the
lip.
When
the lip plunges
into the space
of the wheel
A,
the spool stop-
per engages
with the stop ratchet of the friction shaft system
at the same
time.
When
the shutter
is released,
the 2nd curtain
selector
gear actuates
the spool stopper
as to pull the lip out the wheel A through the re-set
actuator,
stopper
release
lever and others,
Now the spaces
of the wheel A are again-blocked
by the teeth of the
wheel B that has returned
to the original position by the spring.
This
operation
repeats
itself
inthe
same
manner.
The movements
of these
wheels Aand
B are illustrated in Fig. 2-13.
A certain
number of the rotation on the counter roller required to
advance
one-pitch of the transport
control wheel A,
provides
a proper
length of the film to be transported for each exposure.
pie fey cfm sR Ed
rs 2-13
;
frame
stabilizer
While the film is transported before the exposure
counter
shows
No. 0
marking,
the shutter
system
remains
un-cocked,
Therefore,
in order
to stabilize the first plunging
operation
of the lip to wheel A by which the
first frame
is provided,
the other
system
which keeps the lip ''pushed"'
even when the shutter
remains
un-cocked,
is necessary.
First frame
stabilizer
( a lever) keeps the stopper
release
lever
in
its original position permitting
the lip being pushed while the shutter
remains
un-cocked,
As the first shutter
cocking
is completed,
the sele-
ctor gear disengages
the first frame
stabilizer
through the coupler
lever.
Following
operations are the same
as described.
~~
Pig.2-14
ACTUATOR —
STOPPER RELEASE COUPLER LEVER
PIN POSITION
STOPPER RELEASE LEVER
RELEASED
SELECTOR
asia
PIRST FRAME STABILIZER
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