Working models of Oldham coupling, Gearless transmission and Scotch yoke mechanism, not animation
Oldham's coupling is an inversion of double slider-crank mechanism. An Oldham coupler is a method to transfer torque between two parallel but not collinear shafts at some distance. Oldham Coupling is used to join two shafts that have a lateral misalignment.
The Scotch Yoke (also known as slotted link mechanism) is a reciprocating motion mechanism, converting the linear motion of a slider into rotational motion, or vice versa

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Oldham coupling mechanism, gearless transmission