A pinion that advances, returns and rotates in a ring
Pinion m turns in ring b on a square iron shaft through tube n o, driven back and forth by wheel r.
A mechanism combining three motions at once: the pinion m turns within the ring b, while the whole ring is pushed forward and backward by the wheel r, so the movement goes forward, returns, and also rotates. The pinion is mounted on a long square iron shaft that passes through the square tube n o. A smaller sketch shows how the pivot of the wheel r is held fixed, and below the mechanism is drawn again disassembled into its separate parts.
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Pinion m within ring b: advances, returns and rotates
The pinion m turns within the ring b while the ring is pushed forward and back by the wheel r, so the movement goes forward, returns, and also turns around. The pinion is mounted on a long square iron that passes through the square tube n o.
Fixing the pivot of wheel r; the parts shown separately
A smaller figure shows how the pole (pivot) of the wheel r is fixed in place. Below, the same mechanism is drawn disassembled, so that the lower pieces are all the parts of the one above.