Fire sprinkler and ceiling panel assembly

Claim 1

A fire sprinkler and panel ceiling assembly comprising: a fire sprinkler head having a construction for spreading a fire prevention fluid over a wide area, a vertical pipe attached to and carrying said fluid to said head, a horizontal ceiling panel having a head passage extending vertically therethrough, a panel supporting assembly having a panel opening extending generally vertically therethrough, said supporting assembly having panel-engaging portions extending under edges of said panel and supporting said panel and disposed at edges of said panel opening, and said head passage hole being large enough to permit a tilting and a rotating of said panel with respect to said panel opening and a passing of said panel down over said head for removal of said panel from the remainder of said assembly, and a panel hole cover having a perforation therethrough receiving said pipe and of a size as measured in a horizontal plane which latter size is large enough to substantially cover said head passage hole as seen from therebeneath except for the portion of said perforation occupied by said pipe, said cover having a plurality of separable parts so that said cover can be removed from said pipe by movements of certain parts of said cover in directions laterally of said vertical pipe, disconnectable means holding said cover parts together in a manner permitting sufficient separation of said cover parts for removing said cover from said pipe in directions other than vertically off of an upper portion of said pipe; said cover comprising a first part having a main portion having a concave undersurface and having a pipe reception indentation disposed substantially centrally of one side thereof as seen in bottom plan view for receiving a part of said pipe, the other side of said main portion having a generally convex edge configuration as seen in bottom plan view, said first part having an offset portion disposed in use position offset upwardly from said main portion and projecting from said one side thereof on one side of said pipe indentation, said offset portion having an edge farthest from said pipe indentation, said farthest edge being offset toward said indentation from the adjacent part of the said generally convex edge of said main portion, said cover having a second part having a shape describable in the same way said first part is above described, said two cover parts being disposed with their said one sides adjacent each other and their pipe indentations adjacent each other, and their concave sides both facing upwardly so that said indentations from a pipe opening, said second part having its offset portion on an opposite side of said pipe opening from the said offset portion of said first part, said parts each having a tab attached thereto and disposed on one side of said pipe opening and each having a tab-receiving notch on a side of said pipe opening which is opposite to said tab, said tabs extending downwardly through said notches respectively whereby said cover parts are substantially limited as regards horizontal movements with respect to each other.