Minolta XD - Page 15

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6-2. Preset drive and diaphragm stop mechanism
MP return leve
Magnetic release Mg.
Magnetic piece charge lever
Magnetic piece lever
Diaphragm stop Mg.
Diaphrag stop wheel
Tr
Diaphragm operation gear
Preset lever
MP loop spring
Preset operation lever
Damper set lever Release lever
When magnetic release switch (S3) is turned ON, coil is electrified to cancel the magne-
tic field of the permanent magnet. Then yoke and magnetic piece are demagnetized and
magnetic release lever hits release lever by the function of magnetic release spring.
Then S; is turned OFF and control circuit is activated and the indication goes out.
Preset operation lever, held by damper set lever, starts moving by the function of MP
loop spring. Then magnetic piece charge lever, held by the tip of preset operation lever,
is set free, and simultaneously preset lever starts moving to stop down.
At that time, preset operation lever moves while pushing diaphragm operation gear part
@. So, preset lever is operated by the function of escape wheel and anchor governor.
When diaphragm stop signal comes from control circuit, coil for diaphragm stop magnet
is electrified and then magnetic piece lever is turned by magnetic piece charge spring,
thus stopping diaphragm stop wheel, and then preset lever is stopped via diaphragm
operation gear and preset operation lever.
Just before completion of shutter second curtain operation, MP return lever is released
by the signal from closing lever and starts returning by the function of MP return
spring and return lever support spring.
When damper set lever is returned by MP return lever and also preset operation lever
is pushed back, preset lever is also returned via MP loop spring.
Just before completion of preset operation lever motion, the end of preset operation
lever pushes magnetic piece charge lever to turn magnetic piece lever thus setting
diaphragm stop wheel free.
Then diaphragm operation gear is also returned and magnetic piece is attracted by yoke.
At the magnet block for magnetic release, magnetic release lever is pushed back by MP
return lever and then magnetic piece is attracted by yoke.