What mechanical action distinguishes Roberts' ratchet from Campagnolo's skewer?

Answer

The skewer secures a removable assembly, while the ratchet deals with rapid tightening/loosening of a fixed connection

The functional divergence is that Campagnolo's device secures a component meant to be removed (the wheel), whereas Roberts' invention addressed the speed of fastening a permanent connection point using ratcheting action.

What mechanical action distinguishes Roberts' ratchet from Campagnolo's skewer?
inventioninventormechanismquick release