| 摘要 |
For use in a speed change transmission having shift rails to effect speed changes, a shaft carrying a double oscillating motion - single linear motion cam, with a cam follower surface in a shift rail being adapted to cooperate with the cam to effect axial movement of the shift rail in one and the same direction upon both clockwise and counter clockwise rocking of the shaft, with the cam and cam follower surface including substantially similar opposed upper and lower cam operating surfaces and cam follower notches, respectively.
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