Argus C3 - Page 9

LOWER
LOBE
ON
MAIN
LEVER
PIN ON
F IRST GEAR
SEGMENT
FIGURE
12
first
geor
segment rototes in o clockwise direction. The
foriher
the first geor segment
moves
clockwise, the longer it remoins
in
contoct
with the moin lever lobe during
the releose cycle
--
ond
the slower the
resulting shutter speed.
The bell
cronk
pivots
onon eccentric
beoring
which provides
on odiustmentpoint
fortheshutter speeds.
You'll
odiust the
shut-
ter
speeds
ofter
replocing the fronf plote
--
o hole through
the
front plote ollows you to reoch the eccentric beoring,
os
you'll
see o little loter.
You
con
see
thot the ArgusC-3
retord system is
quite
unlike
onything exomined in
previous sysfems.
But
the most unusuol
port
of the whole design is the time
ot
which
theretord is introduced.
ln
othershutters werve
discussed,
the blodesopen
fully
before
the
speeds escopement slows
down
the moin lever
--
the escopement
then holds the
blodes
fully
open
for the required length of time.
Yet
in theArgus
C-3, the moin
leverstrikes thefirst
geor
segment
iust
os the
blodesstort
toopen. So the retord is
introducedduring
the blode-opening
time
--the
slower the shutter speed, the more
slowly the
blodes
open.
The
position
of the
pin
on the firstgeorsegmentot
theslowest
shutterspeed
is criticol
--
coreful
observotion now will help you
inodiusting theescopemenf
during
reossembly.
Thot
is, thespeeds
escopement hos o sliding
odIustment
--
ofter loosening
the two
screws
shown in f igure I3,
you con slide
the
complete
escopement
to odiust
its
position.
Referring
to
figure
13, here's the timing
you should
note:
10