Joint construction between components of military projectile and releasable by melting of fusible eutectic helical member

A joint construction for use between a military rocket motor and a warhead adapted to be propelled by combustion of a propellent in said motor, said joint construction comprising

• a generally cylindrical motor tube having a connection to the front end of said rocket motor,
• said motor tube having a substantially cylindrical front component,
• a generally cylindrical casing having a connection to the rear end of said warhead,
• said casing having a substantially cylindrical rear component,
• said components having respective substantially cylindrical surfaces which are telescopically receivable one within the other,
• said cylindrical surfaces having confronting substantially helical screw thread grooves formed therein,
• and a fusible substantially helical joint member receivable in said screw thread grooves to form a secure connection between said components,
• said fusible substantially helical joint member being made of a metal alloy having a melting temperature greater than that normally encountered during operation but less than the autoignition temperature of the propellent whereby the application of heat to said joint construction by a fire or the like will melt said joint member so as to disconnect said warhead from said rocket motor.

A joint construction for use between a military rocket motor and a warhead adapted to be propelled by combustion of a propellent in said motor, said joint construction comprising

• a generally cylindrical motor tube having a connection to the front end of said rocket motor,
• said motor tube having a front portion formed with an internal substantially cylindrical surface,
• a generally cylindrical member having a connection to the rear end of said warhead,
• said generally cylindrical member having a reduced substantially cylindrical rear portion formed with an external substantially cylindrical surface which is telescopically receivable within said internal cylindrical surface,
• said internal and external substantially cylindrical surfaces having respective confronting internal and external substantially helical screw thread grooves formed therein,
• and a fusible substantially helical joint member receivable in said screw thread grooves to form a secure connection between said motor tube and said cylindrical member on said warhead,
• said fusible substantially helical joint member being made of a metal alloy having a melting temperature greater than that normally encountered during operation but less than the autoignition temperature of the propellent whereby the application of heat to said joint construction by a fire or the like will melt said joint member so as to disconnect said warhead from said rocket motor.