Swing balancers

 

— the term "rocking chair" can mean different designs. These may be two seats at opposite ends of a swing board or bar (mounted in such a way that when one seat is lowered, the other is raised); a seat mounted on a thick vertical spring and tilting in different directions; "horse" on curved skids, etc. Accordingly, rocking chairs can be single and multi-seat, street or home — depending on the variety.