The lengths of the links comply with the conditions: A͞B=D͞C=F͞E, A͞D=B͞C, A͞F=B͞E and D͞F= C͞E. Points B, C and E describe circles of equal radius; links 1, 3 and 5 have equal angles of rotation. The mechanism transmits rotation from driving link 1 to arbitrarily located links 3 and 5.
$640$LW,PC$