Abstract: Apparatus for driving a swing for an occupant of a certain mass and size where the drive mechanism includes a pneumatic power system and linkage for oscillating swing arm brackets. The power system is interconnected between the brackets and a stationary support and is self-compensating for variations in load related to natural frequency of the certain mass and wind resistance relative to occupant size. The power system includes a piston/cylinder arrangement where the piston is drivingly connected to at least one of the swing arm bracket supports and grounded to a stationary support. An automatically self-indexing valve control unit is attached relative to the piston/cylinder arrangement. The valve includes a reversing trigger arm carried by either the piston or cylinder configured to reset pneumatic flow direction with each oscillating piston stroke. The power system timed and is self-compensating for variations in natural frequency due to occupant mass and air resistance.

Abstract: Apparatus for driving a swing for an occupant of a certain mass and size where the drive mechanism includes a pneumatic power system and linkage for oscillating swing arm brackets. The power system is interconnected between the brackets and a stationary support and is self-compensating for variations in load related to natural frequency of the certain mass and wind resistance relative to occupant size. The power system includes a piston/cylinder arrangement where the piston is drivingly connected to at least one of the swing arm bracket supports and grounded to a stationary support. An automatically self-indexing valve control unit is attached relative to the piston/cylinder arrangement. The valve includes a reversing trigger arm carried by either the piston or cylinder configured to reset pneumatic flow direction with each oscillating piston stroke. The power system timed and is self-compensating for variations in natural frequency due to occupant mass and air resistance.

Abstract: A multi-color printing press having a single segmented impression cylinder with multiple, segmented blanket cylinders of equal diameter arranged about the periphery thereof. The segments of the impression cylinder and the blanket cylinders are equal in length and the number of segments on the impression cylinder is equal to the number of segments on the blanket cylinders multiplied by a whole number, plus one additional segment. Each blanket cylinder is provided with a plate cylinder of equal diameter which has the same number of segments. Color rolls provide each segment of the plate cylinder with a different color. Sheets to be printed are fed to the gripping means on the successive segments of the impression cylinder and delivery means removes sheets after printing. Each sheet is held on the impression cylinder for a number of revolutions equal to the number of segments on any one blanket cylinder.