Toxic agent leak detector

Claim 1

A STRUCTURE COMPRISING A SEALED OUTER RECEPTACLE ENCLOSING AT LAST ONE INNER CONTAINER CONTAINING A VAPORIZABLE TOXIC CHEMICAL WARFARE AGENT SELECTED FROM THE GROUP CONSISTING OF NERVE AGENT AND VESICANT, AND AT LEAST ONE SOLID TRANSPARENT THREADED DETECTOR PLUG SEALINGLY PROJECTING THROUGH AT LEAST ONE THREADED APERTURE IN A WALL OF SAID RECEPTACLE, SAID PLUG COMPRISING A SOLID ONE-PIECE TRANSPARENT MATERIAL IN THE SHAPE OF A BOLT HAVING AN ENLARGED HEAD MEANS FOR ASSEMBLING AND SEALING SAME AND AN ELONGATED CYLINDRICAL SHAPED PARTIALLY THREADED BODY EXTENDING THEREFROM WITH THE END PORTION OF SAID BODY CONTAINING A COATING OF CHEMICAL DETECTING MATERIAL FROM THE GROUP CONSISTING OF ((C2H3)2NC6H4)2CNOH WITH ZINC THIOCYANATE, ((C2H3)2NCH6H4)2-CNOH WITH MERCURIC BROMIDE, DISODIUM SALT OF DIISONITROSOACETONE, SODIUM SALT OF M-(P-ANILINOPHENYLAZO) BENZENE SULFONIC ACID, AND SILICA GEL CONTAINING NICKEL CHLORIDE, WHICH CHANGES COLOR UPON CONTACT OF SAID CHEMICAL WAFARE AGENT WHEREBY IF AGENT LEAKAGE OCCURS THE CHANGE IN COLOR OF THE SAID DETECTING MATERIAL IS VISIBLE THROUGH THE SAID HEAD MEANS AND THE SAID BODY FROM OUTSIDE THE SAID SEALED OUTER RECEPTACLE.