Multi-circuit electrified ceiling grid

Abstract

A suspended ceiling elongate grid tee having a lower flange, a vertical web, and an upper hollow reinforcing bulb, at least some of the flange, web and bulb elements, having relatively flat exposed or accessible surfaces, and a plurality of pairs of conductors attached to said flat surfaces and extending along substantially the full length of the tee whereby grid tee is capable of carrying at least two fully independent DC circuits.

1 . A suspended ceiling elongate grid tee having a lower flange, a vertical web, and an upper hollow reinforcing bulb, at least some of the flange, web and bulb elements, having relatively flat exposed or accessible surfaces, and a plurality of pairs of conductors attached to said flat surfaces and extending along substantially the full length of the tee whereby grid tee is capable of carrying at least two fully independent DC circuits. 
     
     
         2 . A grid tee as set forth in  claim 1 , wherein said conductors comprise ink strips coated over said flat surfaces. 
     
     
         3 . A grid tee as set forth in  claim 1 , wherein said tee is a roll-formed sheet metal product. 
     
     
         4 . A grid tee as set forth in  claim 3 , wherein said conductors are attached to the sheet metal before it is shaped from a flat profile. 
     
     
         5 . A grid tee as set forth in  claim 1 , wherein said flat conductors are metal foil strips or metal tapes adhesively bonded to the grid tee.