Round eccentric 1 rotates about fixed axis B. Link 3 has collar a encircling eccentric 1, and is connected by turning pairs A and C to links 4 and 5. Links 4 and 5 are connected by turning pairs D and E to link 6 which turns about fixed axis F. Connecting rod 7 is connected by turning pairs A and G to link 3 and to slider 2 which moves in fixed guides b. When eccentric 1 rotates about axis B, slider 2 reciprocates.
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