Shade

Claim 1

A SHADE COMPRISING A DRUM, A FIRST SPOOL FIXED TO ONE END OF THE DRUM, A SECOND SUPPORTED BY THE OTHER END OF THE DRUM, MEANS FOR MOUNTING THE SPOOLS FOR ROTATION ON OPPOSITE SIDES OF AN OPENING ADJACENT AN END THEREOF, AN AXIAL BORE IN THE DRUM ADJACENT THE SECOND SPOOL, A TORSION SPRING IN THE BORE HAVING ONE END CONNECTED TO THE DRUM, THE OTHER END THE SPRING BEING CONNECTED TO THE SECOND SPOOL WHEREBY THE SECOND SPOOL IS ROTATABLE RELATIVE TO THE DRUM AND ROTATION OF THE SECOND SPOOL PRODUCES AN OPPOSING MOVEMENT IN THE TORSION SPRING, A CORD HAVING A FIRST END ATTACHED TO THE FIRST SPOOL AND A SECOND END ATTACHED TO THE SECOND SPOOL, THE CORD BEING WOUND ABOUT THE SPOOLS IN A DIRECTION OPPOSITE TO THE DIRECTION OF ROTATION IN WHICH THE SECOND SPOOL IS BIASED BY THE TORSION SPRING, FLEXIBLE SHEET MEANS HAVING AN EDGE ATTACHED TO THE DRUM, THE SHEET MEANS BEING ROLLED ABOUT THE DRUM IN A DIRECTION OPPOSITE TO THAT IN WHICH THE CORD IS WOUND ABOUT THE SPOOLS, A ROD SUPPORTED BY THE EDGE OF THE SHEET FURTHEST FROM THE DRUM, A GROOVE IN THE ROD, THE CORD HAVING A CENTRAL PART RECEIVED WITHIN THE GROOVE, MEANS TO HOLD THE CORD IN THE GROOVE WHILE PERMITTING THE CORE TO SLIDE IN THE GROOVE, A PROJECTING MEMBER ON EACH SIDE OF THE OPENING ADJACENT THE END OF THE OPENING OPPOSITE THE DRUM, THE PART OF THE CORD DEPENDING FROM THE FIRST SPOOL EXTENDING AROUND THE PROJECTING MEMBER ON THE FIRST SPOOL SIDE OF THE OPENING AND THEN EXTENDING TO THE ADJACENT END OF THE ROD, THE PART OF THE CORD DEPENDING FROM THE SECOND SPOOL EXTENDING AROUND THE PROJECTING MEMBER ON THE SECOND SPOOL SIDE OF THE OPENING AND THEN EXTENDING TO THE ADJACENT END OF THE ROD.