Accession Number : ADD015549

Title :   Thermally Activated Case Venting Safety Apparatus.

Descriptive Note : Patent, Filed 30 Sep 91, patented 13 Oct 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Koontz, Robert A

Report Date : 13 Oct 1992

Pagination or Media Count : 9

Abstract : A thermally activated case venting safety apparatus is used to minimize the potential for detonation of a warhead or other encased explosive when such item is subjected to excessive thermal environments. An aft end closure plate to a warhead casing is secured using an expandable snap ring with a temperature activated releasing mechanism. The snap ring is expanded using a caliper device with an adjustable slide assembly which adjust the snap ring to the required dimensions. An eutectic solder plug or similar plug is attached to the bottom base of the adjustable slide assembly and holds the snap ring in the expanded position. The plug will melt at a predetermined temperature and thus allow the expandable snap ring to retract. Once the snap ring has retracted, the closure plate will be ejected due to the internal case pressure and the warhead case will vent....

Descriptors :   *PROJECTILE CASES, *EXPLOSIVE WARHEADS, *PATENTS, ASSEMBLY, BOTTOM, CLOSURES, DETONATIONS, ENVIRONMENTS, EUTECTICS, EXPLOSIVES, INTERNAL, MELTS, PLATES, PLUGS, PRESSURE, RINGS, SAFETY, VENTING, VENTS, WARHEADS, SAFETY EQUIPMENT, THERMAL STABILITY, HIGH TEMPERATURE

Subject Categories : Ammunition and Explosives
      Safety Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE