Olympus OM-1 Repair Manual page 26

B-5
(1) Film Advance
When 8749 is turned, (8755) is driven in the arrowed direction by means
of (8805). When (8755) moves, two (8758) pivoted at (8760) is moved
in the arrowed direction to engage on (8761) and to turn it.
(8762) is screwed on (8761) which rotates simultaneously to drive gears
engaged on it. This starts the film advancing motion. One of the two
(8758) will rotate (8761).
Upon turning (8749) to the fullest extent, and releasing it, (8755) returns
to the original positon moving in the arrowd direction by means of 8774
hooked on 8755 . At this time, since (8758) escapes in the arrowed
direction, pivoted at 8760 , there is no clicking sound for (8758) going
beyond the latchet. Amount of (8758)'s escape is determined by the
guiding hole for (8760) on (8755).
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