Patent ID: 8820240
Filing Date: 2014-09-02
Classification: F42C

Abstract:
1. An ammunition safety priming device using silicon micro-mechatronic systems technology having at least two priming safeties intended to be deactivated by as many external independent physical events, comprising: at least one movable element, movable along a translation axis, for deactivating at least one of the priming safeties by action on said movable element by one of the physical events, the movable element being an inertial screw forming a first safety, the physical event acting on the movable element being an axial acceleration force along said translation axis of the movable element for deactivating the first safety, the axial acceleration force being caused by a translation movement of the ammunition along the same translation axis; and a central element held in a sandwich, along a plane perpendicular to the translation axis between an upper closure element and a lower closure element, the central element having an opening forming with the upper closure element and the lower closure element a recess containing a slide configured to slide in the recess in the plane of the sandwich, the slide forming a second device safety, the second safety being deactivated by the presence of a lateral acceleration force perpendicular to the translation axis of the movable element caused by a rotation movement of said ammunition, the slide including a hole, with a first axis perpendicular to the plane of the sandwich, the slide being kept in position in the recess by the inertial screw inserted in the hole of the slide, the inertial screw being itself integral with the lower closure element, wherein the lower closure element comprises, on the side of its upper surface, a top recess separated from a bottom recess by a separating wall in a plane parallel to the plane of the sandwich, the top recess and the bottom recess being of a same circular cylindrical shape with axes of revolution collinear with the translation axis, and wherein the top recess and the bottom recess of the lower closure element have a same first diameter as the head of the inertial screw, the head of the inertial screw being able to slide without resistance in one or the other of the bottom and top recesses of the lower closure element.