Today’s invention is another alternative washing line.
This consists of a number of semicircular sections of hoops, attached to each other so that each semicircle can be rotated about the diameter and locked (forming something like a crankshaft).
This allows the line to run over a path, so people can walk underneath. Half-hoops set in the horizontal plane allow Pi/2 times as much washing line length than normal.
A section placed in a U orientation could even allow children to help by hanging up their own clothes.