Patent ID: 8459184
Filing Date: 2013-06-11
Classification: F42C

Abstract:
1. A micro-machined or micro-engraved safety and arming device for a pyrotechnic train of a projectile to which an axial spin motion is imparted during firing, said device comprising a substrate onto which a shutter to interrupt said pyrotechnic train is deposited that is mobile in translation on said substrate, said device where said shutter to interrupt the train being held immobile by at least two locks, a first lock or axial acceleration lock that is released further to the application of the acceleration communicated to said projectile during firing and a second lock that is a centrifugal lock released further to the spinning of said projectile, wherein said second lock comprises at least one swiveling locking finger positioned between said substrate and said shutter, said finger being oriented in a direction parallel to the direction of movement of said shutter and incorporating a bearing surface against which said shutter presses in its locked position, said finger further incorporating a prolongation, and said device incorporating a counterweight arranged in a housing in said shutter and sliding under the effect of the centrifugal acceleration until coming into contact at the end of its stroke with said prolongation of said finger to cause the latter to swivel and thus release said second lock.