Means for guiding movable wall panels

Claim 1

A GUIDE TRACK FOR UPRIGHT PANELS HAVING A GUIDE ROLLERS MOUNTED ON POSTS PROJECTING UPWARDLY FROM THE UPPER EDGES OF THE PANELS, THE GUIDE ROLLERS BEING ADAPTED TO BE AT DIFFERENT ELEVATIONS, COMPRISING A MAIN TRACK MEMBER ADAPTED TO BE SECURED TO AN OVERHEAD SUPPORT AND HAVING A BOX-LIKE CROSS-SECTIONAL SHAPE INTERRUPTED BY A LONGITUDINAL SLOT EXTENDING CENTRALLY OF THE LOWER WALL OF THE TRACK MEMBER, A PAIR OF BRANCH TRACK MEMBERS EXTENDING LATERALLY FROM SAID MAIN TRACK MEMBER IN OPPOSITE DIRECTIONS AND CORRESPONDING THERETO IN CROSS-SECTIONAL SHAPE, SAID MAIN TRACK MEMBER BEING OPEN TO SAID BRANCH TRACK MEMBERS AND HAVING BRANCH SLOTS AS A CONTINUATION OF THE SLOTS OF SAID BRANCH TRACK MEMBERS, A CURVED DIVERTER CAM ELEMENT EXTENDING FROM THE SIDE WALL OF SAID MAIN TRACK MEMBER FARTHEST FROM ONE OF SAID BRANCH TRACK MEMBERS TO THE FARTHEST WALL OF SAID ONE BRANCH TRACK MEMBER, SAID CAM ELEMENT BEING OF A HEIGHT SUBSTANTIALLY LESS THAN THE HEIGHT OF THE TRACK ELEMENT WHEREBY TO LEAVE AN UNINTERRUPTED PASSAGE SPACE OF SUBSTANTIAL HEIGHT AND BEING INTERRUPTED IN THE REGION VERTICALLY ABOVE THE TRACK SLOT LEADING TO THE OTHER OF SAID BRANCH TRACKS, AND A CURVED DIVERTER CAM ELEMENT EXTENDING FROM THE SIDE WALL OF SAID MAIN TRACK MEMBER FARTHEST FROM THE OTHER OF SAID BRANCH TRACK MEMBERS TO THE FARTHEST WALL OF SAID OTHER BRANCH TRACK MEMBER AT AN ELEVATION ABOVE SAID FIRST-MENTIONED INTERRUPTED DIVERTER CAM ELEMENT.