Safety device for a blasting - or propellant charges are exposed to the temperature fluctuations.

摘要

The invention has for its object a device for the safety of operation for explosive device and / or propelling (1) is subjected to a temperature variation, a device of the type comprising the pyrotechnic materials (2) and at least one means for driving in movement of a display element (3) of the state of the vehicle. & br / the drive means comprises a thermal sensor (4) made of a shape memory alloy placed in contact, or in the vicinity of the pyrotechnic materials, cooperating with the element of visalisation when a predetermined temperature threshold is crossed. & br / & this device allows a visual check is periodic or circumstance of the state of the explosive devices and / or propelling particularly missiles, as well as an improvement of the safety and reliability of operation of those -.