Theory of Machine
It is required to connect two parallel shafts, the distance between whose axes is small and variable. The shafts are coupled by

Universal joint
Flexible coupling
Knuckle joint
Oldham's coupling

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Theory of Machine
Angle of ascent of cam is defined as the angle

During which the follower returns to its initial position
Through which the cam rotates during the period in which the follower remains in highest position
Of rotation of the cam for a definite displacement of the follower
Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

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