Abstract: A walking beam (20) is supported on and fixedly coupled to a pair of vertical rods (39) slidably received in bushings (41) mounted on a horizontally-movable carriage (40) held stationary in the absence of overriding force by a friction brake (60) coupled through a lost motion coupling (46, 48, 66) with a drive member 32 moved by an actuator 31 to undergo in alternation forward and reverse strokes. The rods (39) are pivotally coupled to the drive member (32) by inclined links (36). The arrangement is adapted to convert each forward and subsequent reverse stroke of the drive member into an up-forward-down-return rectangular movement of the beam (20).

Abstract: Apparatus (20) for imparting stepwise movement to a strip (10) having pilot holes (12) comprising, a frame (27), a carriage (26) mounted by said frame to be longitudinally movable in relation thereto, a pin (22) coupled with said carriage movable therewith and laterally movable in relation to said path between positions at which pin is adapted to enter into and to be retracted from a pilot hole in said strip. A link (30) is adapted to undergo alternate forward and reverse strokes and is coupled to said carriage by a lost motion coupling (46, 57, 56, 57) so that, during a first interval of each such stroke, the carriage and link are uncoupled with the carriage remaining stationary and, during a second interval of each of such strokes, the carriage and link are coupled to move together.