Theory of Machine
The gear train usually employed in clocks is a

Reverted gear train
Differential gear
Simple gear train
Sun and planet gear

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

Through which the cam rotates during the period in which the follower remains in highest position
During which the follower returns to its initial 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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