Combination catalyst screen support and cover

Claim 1

IN A COVER AND SCREEN UNIT FOR A REACTOR HAVING A PLURALITY OF TUBES, A SCREEN DISPOSED IMMEDIATELY BENEATH THE REACTOR TUBES TO SUPPORT A CATALYST WITHIN THE TUBES, A COVER PLATE PROVIDED AT THE LOWER END OF THE REACTOR BENEATH SAID TUBES, MEANS ON SAID COVER FREE OF SAID REACTOR TO EFFECT RAISING AND LOWERING OF SAID COVER, MEANS SECURED TO SAID COVER PLATE AND TO SAID SCREEN TO SECURE SAID SCREEN TO THE COVER AND HOLD THE SCREEN IN POSITION BENEATH THE TUBES WITHIN SAID RECTOR AND SUBSTANTIALLY REMOVED FROM SAID COVER AT A POSITION REQUIRING LOWERING OF THE SCREEN TO PERMIT PIVOTING OF THE SCREEN FROM WITHIN THE REACTOR, AND VERTICALLY SLIDING PIVOTAL HINGE MEANS CONNECTING SAID COVER PLATE AND REACTOR TO EFFECT LOWERING OF SAID COVER PLATE AND SCREEN AND THEN TIPPING TO PERMIT THE FLOW OF LOOSE CATALYST OFF OF THE SCREEN WITHOUT COMPLETE DISASSEMBLY OF THE COVER PLATE AND SCREEN FROM THE REACTOR.