Fastening of attachments such as boiler casing to expanded metal

Claim 1

AN APPARATUS FOR APPLYING BOILER CASING TO A FURNACE AND FURNACE WALL TUBING LINING THE WALLS THEREOF COMPRISING: A BLANKET OF INSULATING MATERIAL SECURELY FASTENED TO THE FURNACE WALL TUBING; SAID BLANKET HAVING AN EXPANDED METAL MESH ON ITS OUTER SURFACE; A PLURALITY OF CLIPS, EACH CLIP HAVING A FLAT METALLIC PLATE AND A PLURALITY OF RIGID DART-SHAPED PROJECTIONS APPROXIMATELY PERPENDICULAR TO SAID PLATE; EACH DART COMPRISING A TRIANGULAR MEMBER SUPPORTED AT THE CENTER OF ITS BASE, SO THAT THE EDGES OF THE BASE FORM SHOULDERS, WITH THE SUPPORTING MEMBER MAINTAINING SAID BASE A DISTANCE FROM THE FLAT PLATE APPROXIMATELY EQUAL TO THE THICKNESS OF THE EXPANDED METAL MESH; SAID CLIPS BEING FORCED AGAINST THE EXPANDED METAL MESH SO THAT THE DART-SHAPED PROJECTIONS PASS THERETHROUGH AND THE SHOULDERS ENGAGE THEREON; AN OUTER CASING PLACED FIRMLY AGAINST THE EXPANDED METAL AND CLIPS; AND MEANS FOR SECURING OUTER CASING TO SAID CLIPS.