Radiant screen and louver construction

Claim 1

AN IMPROVED HEAT CONTROL SCREEN COMPRISING: A PLURALITY OF HOLLOW HEAT TRANSFER LOUVERS, HOLLOW PIVOT MEANS SECURED TO EACH END OF INDIVIDUAL ONES OF SAID HOLLOW LOUVERS BEING OPERABLE TO PROVIDE A PATH FOR FLUID COMMUNICATION WITH THE HOLLOW PORTION OF SAID LOUVER; AN INLET MANIFOLD AND AN OUTLET MANIFOLD EACH HAVING A PLURALITY OF SPACED APART TRANSVERSE APERTURE MEANS ADATPED TO RECEIVE THE PIVOT MEANS FOR SUPPORTING SAID LOUVERS IN EVENLY SPACED RELATIONSHIP, SAID PIVOT MEANS AND APERTURE MEANS BEING OPERABLE TO PIVOT SAID LOUVERS ABOUT SPACED APART AXES; RESILIENT SPACER MEANS CONNECTED AROUND EACH SAID PIVOT MEANS AND BEARING AGAINST SAID MANIFOLDS FOR SUPPORTING SAID LOUVERS AGAINST SUBSTANTIAL AXIAL MOVEMENT RELATIVE TO SAID MANIFOLD; ONE OF SAID SPACER MEANS ASSOCIATED WITH EACH INDIVIDUAL LOUVER BEING REMOVABLY CONNECTED SO THAT REMOVAL OF SAID REMOVABLY CONNECTED SPACER MEANS PERMITS AXIAL MOVEMENT OF SAID LOUVER, ONE OF SAID PIVOT MEANS BEING OPERABLE TO BE SLIDABLY WITHDRAWN FROM THE ASSOCIATED MANIFOLD APERTURE AND SASID OTHER PIVOT MEANS HAVING A PORTION OF GREATER DIAMETER FOR BEARING CONTACT WITH SAID APERTURE AND A PORTION OF LESSER DIAMETER INTERMEDIATE THE LOUVER AND THE PORTION OF GREATER DIAMETER TO PERMIT SWINGING OF TO THE LOUVER OUT OF AXIAL ALIGNMENT WITH THE MANIFOLD APERTURES FOR COMPLETE AXIAL WITHDRAWAL OF THE OTHER SAID PIVOT MEANS.