Link 1 oscillates about fixed axis A and is connected by springs 4 and 5 to sliders 2 and 3 which move along fixed guides. Sliders 2 and 3 are spring-loaded by springs 6 and 7. When link 1 oscillates about axis A, links 2 and 3 have vibrating motions along axis x-x due to the action of springs 4, 5, 6 and 7.
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