Ordinary Position Of Crown (Main-Spring Winding); Second Position Of Crown (Day And Date Correction); Third Position Of Crown (Setting Time) - Seiko 6138A Manual

6f 3BA Setting Mechanism
Ordinary position of crown (main-
spring winding)
The crown wheel and the second
intermediate ratchet wheel are
caulked on the barrel and train
wheel bridge. The intermediate rat-
chet wheel is supported by a pin
mounted on the plate.
Second position of crown (day and
date correction)
l. Clockwise - Date correction
When turning the crown to the
right (clockwise), the correcting
gear moves to the date dial side
and interlocks with it. thus date
is corrected. Force transmission
is through crown
+
clutch
wheel
-
setting wheel + cor-
recting g€ar + date dial.
2. Counterclockwise - Day correc-
tion
When turning the crown to the
left (counterclockwise), the cor-
recting gear moves to the day
star with dial disk side and inter-
locks
with the
intermediate
wheel for day correction, and
day is corrected. Force is trans-
mitted through crlwn - clutclt
wheel -
setting wheel + cor-
recting gear +
intermediate
wheel for day correction -
day
star with dial disk.
Third position of crown (setting
time)
The setting wheel lever complete
moves to the minute wheel side by
action of the setting lever with axle,
and the intermediate setting wheel
interlocks with the minute wheel.
hand is set correctly. Simultaneous-
ly, motion of the setting wheel lever
complete is transmitted to the day-
date correction wheel rocking lever,
and the cotecting gear attains a
position where it interlocks neither
the date dial nor intermediate wheel
for day correction by action of the
setting wheel lever complete and the
day-date correction wheel rocking
lever.
Crown wheel
W i ndi n g p i ni o n
Intermediate ratchet
wheel
Second intermediate
r at c he t w he el
Ratchet wheel (barrell
Fi s .21
― Date dial
Fi s .22
( D ay s t a r l
I ntern
for da
Fis.23
M in ut e w hee l
( Intermediate setting wheel)
Setting wheel lever
c o mp l et e
Daydate corrector
wheel rocking lever
Fi 9. 24
- 61 3 8A - l 0-
Intermediate wheel
for day correction