ABSTRACT
Quick-return mechanisms, typified by ABeD in Figure 1 6 . 1 , are a spe cial class of sliding contact linkages that provide uniform velocity mo tion followed by a fast-return stroke to an initial position. These mech anisms , often used in equipment such as machine tools and production machinery to produce long, slow movements for cutting or feeding and fast-return strokes in which no work is done, are generally found in two basic arrangements :
1 . The crank-shaper (or oscillating-beam) type (Figure 1 6 . 2 ) , where the crank arm AB is shorter than the base AD, and as a result, the follower CD oscillates as the crank arm makes a complete revolu tion.
