Argus C3 - Page 30

shuiter
the
inner releose lever pushes
the bulb lever
down
slightly,
into the
poth
of the
bulb lug on the moin
drive column.
So os the
moin drive column rototes ond
opens the
blodes, the
lotching
end of ihe
bulb
lever cotches
the
bulb
lug.
The bulb
lever
then
prevents
the moin
drive
column from
completing
its
rototion
(to
close
the blodes)os long os you hold
the releose plunger
depressed.
When
you
let upon the releose
plunger,
the inner releose lever
frees
the
bulb
lever
--
the
bulb lever
spring
then pulls
the bulb
lever up to
disengoge
the
moin
drive
column.
The one
remoining function of the
moin drive column
involves
fhe
operotion of the sync
contocts.
The CONTACT
CLOSING
CAM
oi
the top of the
moin
drive
column ond the STAR
WHEEL
CAM
iust
below
the contoct closing
com control fhe sync
deloy
ond the contoct
closure, Fig. 38.
ACCESS HOLE FOR
SYNC
PALLET
ECCENTRIC
LOCKING SCREW*
SYNC PALLET
STAR WHEEL
CAM
CONTACT
CLOSING
CAM
FIGURE 38
ln
the
Argus C-4, you hove o
choice
between either
"M"
sync
or
"X"
sync
(or,
in some
models,
between
"F"sync
ond
"X"
sync)
--
you
leorned the meoning
of these terms
in
your
lesson,
"Complex
Escopement
Retord Shufter
--
Porf
1. " Both
sync
deloy
timesoreprovideo
oytheCONTACT
BLOCKshown in figure3g
--
ond the switch
on the comero
top cover
plote
(from
which you
unsoldered
the sync wires)
electricolly determines
which sync
qction
is
delivered.
On
"M"sync,
os you
know, the
flosh
is fired
ond the shutter
opening
is
deloyed
for o froction
of o second
while the floshbulb
reoches
its peok
intensity.
ln
theArgusC-4, thedeloy
is
provided
by the SYNC PALLET which
engoges the teeth
cut in the stor
*DESCRIBED
LATER
IN TEXT
31