In a crank and slotted lever quick-return mechanism shown in Fig.1.46, the distance between the fixed centres is 300 mm and the length of the driving crank is 150 mm. Find the inclination of the slotted lever with the vertical in the extreme position and the ratio of time of cutting stroke to return stroke.

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Pa B2 /2 B A P1 Fig.1.46 Crank and slotted lever mechanism