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RATCHET-GEAR MECHANISM FOR PERIODICALLY VARIABLE ROTARY MOTION

Plate 1, to which pawl 2 is pivoted, is driven through gearing consisting of gears 3, 4, 5 and 6. Gear 3 is keyed to driving shaft 13, which rotates about fixed axis A, gears 4 and 5 are rigidly attached together and rotate on a fixed stud, and gear 6 is rigidly attached to plate 1 with which it rotates freely on shaft 13. The action of pawl 2 is controlled by cam surface b-b of fixed cam 8. Pawl …