Sunshade for ceiling construction

Claim 1

IN A CEILING CONSTRUCTION, THE COMBINATION COMPRISING A PLURALITY OF PARALLEL GENERALLY HORIZONTAL FRAME MEMBERS AND TRANSPARENT PANELS EXTENDING BETWEEN SAID FRAME MEMBERS, A RETRACTABLE SUN SHADE COMPRISING A PAIR OF GUIDE WIRES FIXED TO SAID CEILING AND EXTENDING BETWEEN AND ALONG SAID FRAME MEMBERS, A PLURALITY OF MOVABLE TRANSVERSE RODS HAVING OPENINGS THEREIN ADJACENT AND SPACED FROM THE ENDS THEREOF TO WHICH SAID GUIDE WIRES ARE TRAINED, A FLEXIBLE OPAQUE REFLECTIVE PANEL, MEANS FASTENING SAID OPAQUE PANEL TO SAID RODS COMPRISING A PLURALITY OF POCKETS IN THE LONGITUDINAL EDGES OF SAID OPAQUE PANEL INTO WHICH THE ENDS OF SAID RODS EXTEND, MEANS ENGAGING ONE ENDMOST ROD AND FASTENING IT TO SAID CEILING, MEANS ENGAGING AND MOVING THE OTHER ENDMOST ROD TOWARD AND AWAY FROM SAID FIRST-MENTIONED ENDMOST ROD TO COLLAPSE AND EXTEND SAID SUN SHADE, THE WIDTH OF SAID PANEL BEING GREATER THAN THE DISTANCE BETWEEN THE FRAME MEMBERS SUCH THAT THE LONGITUDINAL EDGES OF SAID OPAQUE PANEL FRICTIONALLY ENGAGE THE SIDES OF SAID FRAME MEMBERS OF SAID CEILING WHEN THE OPAQUE PANEL IS IN EXTENDED POSITION THEREBY SUBSTANTIALLY SEALING THE EDGES AGAINST THE FRAME MEMBERS AND PREVENTING THE PASSAGE OF LIGHT TO THE INTERIOR THROUGH SAID TRANSPARENT PANELS.