Abstract: System for controlling selective relative positional movement of portions of a bed structure with respect to a main supporting bed base frame, such as in a hospital bed, in which a single common motor controllable, e.g. by suitably actuatable switch means, for driving operation selectively in alternative forward and reverse directions is utilized, and which contemplates a plurality of independently operable individual motion transmission means connectable to such bed structure portions for correspondingly effecting the selective relative positional movement thereof with respect to the main supporting bed base frame, e.g.