ARRANGEMENT FOR LOCKING ARMING CONDITIONS

摘要

The present invention relates to an arrangement for locking arming conditions to prevent unintentional arming of SAI-units (10) of ammunition units such as projectiles when the ammunition unit is subjected to external threats. According to the invention a ring shaped shape memory alloy (8) is provided in cooperation with a recess (7) in a plunger (1) comprised in connection to the SAI-unit (10) and a fixed recess (9) to prevent the plunger (1) from axial movement when subjected to heating by changing the shape of the essentially ring shaped shape memory alloy (8) to lock the plunger (1) relative to the fixed recess (9).