A method of manufacturing a metallic case of a pyrotechnical igniter having a wall with at least one weak zone and an inner surface in the case with at least one part facing this at least one weak zone includes positioning the case on a matrix having a plane zone. The method further includes striking the wall with at least one punch so as to, in a single movement of striking, deform at least the part of the inner surface facing this at least one weak zone and having at least one initially curved-in zone in order to bring it on the plane zone and to form in this manner a plane inner surface, and to form the at least one weak zone.

An initiator assembly includes an initiator housing having an initiator cavity and a housing orifice edge. A bridge substrate is positioned within the initiator cavity, the bridge substrate includes a substrate base including a uniform first planar surface and first and second bridge contacts flush with the uniform first planar surface. The first and second bridge contacts form a continuous planar mounting surface. An explosive charge and a flyer plate are within the initiator cavity, the flyer plate interposed between the explosive charge and the bridge substrate. A plunger head is telescopically received in the initiator cavity and includes an anchoring cylinder face having a face perimeter and extends between first and second face ends. The housing orifice edge is anchored to the anchoring cylinder face at a position between the first and second face ends and extends around the face perimeter.

A gas generator includes a lower shell as a housing, an igniter including a squib cup and a plug, and a fixing portion formed from a resin molding for fixing the igniter to the lower shell. The squib cup includes a contact portion in contact with the plug and a non-contact portion not in contact with the plug. The fixing portion includes a cover portion secured to an outer circumferential surface of the squib cup, and the cover portion has a lower-side annular cover portion covering a part of the contact portion and an upper-side annular cover portion covering a part of the non-contact portion. A thickness t2 of the upper-side annular cover portion is smaller than a thickness t1 of the lower-side annular cover portion, and the cover portion is formed in a stepped shape having a substantially two-dimensionally annular step-formed surface orthogonal to an axial direction of the squib cup.

An initiator assembly that includes a housing, a base, an exploding foil initiator, an input charge assembly and an output charge. The housing and the base cooperate to define a cavity. The exploding foil initiator and the output charge are received into the cavity. The input charge assembly is received in the cavity between the exploding foil initiator and the output charge. The input charge assembly includes a holder, which has first and second axial ends, and an input charge. A charge aperture is formed through the first axial end of the holder and does not extend through the second axial end of the holder. The input charge is formed of an explosive material and is received into the charge aperture.

An integrated barrel/bridge detonator subassembly includes a polyimide flyer layer, a conducting layer, and a barrel layer. The conducting layer has an electrically conducting material laminated to a first side of the flyer layer. The conducting layer consists of a single layer of an electrically conducting material. The electrically conducting material forms a first land having a first connecting pad, a second land having a second connecting pad disposed opposite the first land, and a bridge disposed between and providing electrical conductivity between the first land and the second land. A barrel layer formed of an insulative material is laminated to a second side of the flyer layer substantially opposite the first side. The barrel layer has an opening disposed substantially opposite the bridge.

The necessary ESD safety for chemical detonators 1 is ensured by the fact that the sleeve 2 of the chemical detonator 1 is closely encompassed by an aluminum sleeve 20, the ignition pill 5 is sealed in addition by a casting compound 21 and a predetermined flashover position 26 is provided for the priming wires 3, 4.

An initiator assembly having an initiator cartridge. The initiator cartridge has a cartridge housing, an initiation package and an input charge. The cartridge housing is formed of a plastic material and defines an outer circumferential surface, a recess, and a plurality of orientation features. The recess is formed into a first axial end of the cartridge housing. The orientation features are disposed through the first axial end of the cartridge housing and are disposed inwardly of the outer circumferential surface. The initiation package has an exploding foil initiator and a plurality of cartridge terminals. The exploding foil initiator has a bridge. The cartridge terminals are electrically coupled to the bridge. The initiation package is partly encapsulated in the plastic material that forms the cartridge housing. The input charge is at least partly formed of a secondary explosive and is received in the recess in the cartridge housing.

An EFI or LEEFI provides enhanced detonation energy sufficient to directly detonate a main charge to improve the reliability and ease the qualification of an explosive firing train. This is accomplished by forming the EFI's output charge from an explosive material typically used as a booster explosive (e.g., PBXN-5, CH-6 and Composition A5) rather than a primary explosive and making the diameter of the output charge greater than the diameter of the barrel thus increasing the total mass of the output charge. The explosive firing train now requires only a single explosive transfer interface. For use in military grade munitions, the EFI's casing is formed with one or more vent holes radially adjacent the output charge.

An integrated fireset including a bridge slapper (or exploding via) connected internally to a firing capacitor, flyer material, and solid state switch, the fireset and energetic components encapsulated by a TO type transistor package that is hermetically sealed. The integrated fireset may include an integrated switch; a first electrode; a second electrode and separated from the first electrode by the integrated switch; one or more vias configured to electrically couple the integrated switch and a contact region of the second electrode; and a patterned dielectric layer disposed on the contact region.

The header of an EED is redesigned to increase stiction forces to better hold the main charge throughout deflagration. The header includes a main charge holder, integrally formed or as a discrete component, that has internal structure that is press fit to a complementary outer surface of the main charge. The contact area between the internal structure and the main charge being greater than the contact area between a cylinder that circumscribes the internal structure (the uniform cylindrical shape of a typical EED contact area of *D*L) to increase stiction forces between the main charge holder and the main charge. For a given diameter and length, the inclusion of the internal structure will reduce the mass of the main charge.