(under subclass 54) Apparatus in which a fire extinguishing material is directly restrained against discharge by a plug, support or other device which is in contact with said material until said device is fused, melted or deformed when a predetermined condition is sensed, or in which such a plug, support, etc., operates similarly in another cooperative relation with the extinguishing means.
SEE OR SEARCH CLASS
52, Static Structures (e.g., Buildings),
232, for thermally responsive ceiling structure not claimed as cooperating with a fire extinguishing system.
