Ventilating system using valved ports between panels

Claim 1

IN A VENTILATING STRUCTURE HAVINGA PARTITION THROUGH WHICH CONTROLLED AIR CIRCULATION IS EFFECTED, SAID PARTITION HAVINGAN EXPOSED SURFACE AND AN OPPOSED CONCEALED SURFACE, AND COMPRSIING A PLURALITY OF KERFED EDGE PANELS ARRANGED IN SIDE BY SIDE SUBSTANTIALLY COPLANAR RELATION, SUPPORTED FIRST RUNNERS ARRNGED IN SPACED SUBSTANTIALLY PARALLEL ROWS, SAID RUNNERS ENGAGING CORREESPONDING FIRST OPPOSED KERFED EDGES OF SAID PANELS, AND SECOND RUNNERS DISPOSED IN SPACED SUBSTANTIALLY PARALLEL ROWS ARRANGED TRANSVERSELY WITH RESPECT TO SAID FIRST RUNNERS AND BEING SUPPORTED THEREBY, SAID SECOND RUNNERS ENGAGING CORRESPONDING SECOND OPPOSED KERFED EDGES OF SAID PANELS; EACH SECOND RUNNER INCLUDING A CHANNEL SHAPED CENTRAL SECTION HAVING SPACED LEG PORTIONS ENGAGING THE EDGES OF ADJACENT PANELS AND BEING DISPOSED SUBSTANTIALLY NORMAL TO THE EXPOSED SURFACE OF SAID PARTITION, AND AN APERTURED WEB PORTION INTERCONNECTING SAID LEG PORTIONS, SAID WEB PORTION BEING ADJACENT TO AND SUBSTANTIALLY COPLANAR WITH SAID PARTITION EXPOSED SURFACE, AND END FLANGES EXTENDING LATERALLY IN OPPOSITE DIRECTIONS FROM CORRESPONDING FREE EDGES OF SAID LEG PORTIONS REMOTEE FROM SAID WEB PORTION, SAID END FLANGES BEING DISPOSED WITHIN THE KERFS FORMED IN THE EDGES OF THE PANELS ENGAGED BY SAID LEG PORTIONS; AND A VALVE ELEMENT RESTING UPON SAID WEB PORTION AND BEING MANUALLY SLIDABLE THERON TO SELECTED POSITIONS TO EFFECT OPENING OR CLOSING OF THE APERTURES FORMED IN SAID WEB PORTION AND CONTROL THE CIRCULATION OF AIR THROUGH SAID PARTITION.