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FOUR-BAR PARALLEL-CRANK MECHANISM WITH A CIRCULAR GUIDE

The lengths of the links comply with the conditions: A͞B=D͞C and B͞C=A͞D. Link 2 is designed in the form of an arc-shaped slide block which slides along circular guide a-a having its centre at point D. The mechanism is equivalent to the parallel-crank linkage ABCD in which AB and DC are cranks and BC is the connecting rod. At the extreme positions (dead points) the motion of the mechanism becomes …