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A comment on Five Hundred and Seven Mechanical Movements (1908). Parent comment

Re:Five Hundred and Seven Mechanical Movements (1908) by kd5bjo on Wednesday May 22, 2019 @03:29AM (#19978725)
E is the output gear, and B is the input. The arrangement on the right is to make the frame A and gear C turn in opposite directions, and D adds the two rotations together again to turn E twice for each revolution of B.
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