Timex DYNABEAT 253 - Page 11

Operation
of
the Model
253
Movement
FIGURE
F
BALANCE
CONTACT
SPRING
CONTACT
AREA
"V"CONIC
BEI\RING
BALANCE
STAFF
CONTACT
JEWEL
FIGURE
G
253
.10
The
position
of
the
contact
spring
is
critical
(see
Figure
F)
.
The
spring
must
be
pointing
exactly
at
the
center
of
the
balance
staff
(or
v-conic
bearing).
It
should
be
centered
horizontally
between
the
impulse
disc
and
the
balance
wheel
(see
Figure
G).
The
contact
spring
requires
very
careful
hand
I
ing.
Protect
it
from
scratches
and
de-
forming.
Avoid
·
excessive
bending.
Do
not
touch
the
contact
area
at
the
end
of
the
spring.
Do
no
rubbing,
grinding,
polish-
ing,
etc
.
on
either
side in
this
area
.
Do
not
attempt
to
adjust
the
length
of
the
contact
spring.
Do
not
permit
any
watch
lubri-
cant
near
the
contact
pin,
contact
jewel
or
contact
spring
.