Norman J Macdonald

US Patent:

53969596, Mar 14, 1995

Filed:

Sep 20, 1993

Appl. No.:

8/123110

Inventors:

Norman Macdonald - Boxboro MA

Assignee:

PNM, Inc. - Boxborough MA

International Classification:

A62C 3568

US Classification:

169 51

Abstract:

A sprinkler system, for cooperation with an array of ceiling tiles, essentially features a mount of tiles including at least one with a central opening, a web disposed above the mount of tiles and including a central hub and legs extending therefrom to the corners of a frame with a dimensional profile like that of the tiles, a number of ceiling wires supporting the frame in spaced relation to a ceiling, a sprinkler head supported within the central hub and extending through the central opening, and apparatus for connecting the sprinkler head to a source of fluid. Preferably, the apparatus includes a rigid stationary water grid and supply and a flexible hose connecting the sprinkler head to the water grid and supply. Preferably, the flexible hose is an annealed stainless steel braid hose having an open pitch.