Embodiments of an initiator support assembly that includes an initiator housing including an initiator cavity system are generally described herein. In some embodiments, a bridge substrate is positioned within the initiator cavity. The bridge substrate includes a substrate base including a uniform first planar surface and an opposed second surface. The bridge substrate further includes a first bridge contact extending over the substrate base. The first bridge contact is substantially flush with the first planar surface. A second bridge contact extends over the substrate base. The second bridge contact is substantially flush with the first planar surface. The first and second bridge contacts and the uniform first planar surface form a continuous planar mounting surface. An explosive charge, positioned within the initiator cavity, includes a charge mounting surface that is continuously coupled in surface-to-surface contact across the continuous planar mounting surface.

Exploding foil initiator apparatus, system, and method that improve the current density in the bridge region by modifying the shape and dimensions of the bridge and related components. The exploding foil initiator reduces burn-back by making areas of the bridge thicker except directly under the flyer. The exploding foil initiator boards are built so the flyer is not connected to the rest of the top cover-lay. This avoids losing energy due to the flyer having to tear away from the solid cover-lay.

The embodiments are directed to firing trains. The disclosed firing trains include an insensitive acceptor pellet having a proximal end, a distal end, and a plurality of relative percent theoretical maximum density (TMD) zones from the proximal end to the distal end. A donor pellet is adjacent to the insensitive acceptor pellet and is configured to initiate the insensitive acceptor pellet.

The invention proposes the design of a pyrotechnic initiator applied in the aerospace field, including three main components: the housing, the burning bridge and the pyrotechnic dose. The housing has a protective effect and increases the power of the pyrotechnic dose, in which the number of threads and the thread length are calculated to ensure to withstand the fire pressure. The burning bridge generates heat to ignite the ignition dose, the diameter of the bridge is calculated to ensure the resistance of the burning bridge. The pyrotechnic dose consists of 3 ingredient doses, which are the ignition dose, the intermediate dose, and the fire-boosting dose. In which, the mass, composition and density of the doses are calculated to ensure that the required working pressure is created.

A pulsed current source comprises a power source, a discharge capacitor, and an inductive element. The discharge capacitor is selectively coupled to either of the power source or the inductive element. When coupled to the power source, the discharge capacitor is charged. The inductive element can be connected to a load. The load can have a current-dependent impedance. When the discharge capacitor is coupled to the inductive element, the discharge capacitor discharges through the inductive element and the load. The discharge capacitor and the inductive element are configured so that the current through the load exhibits a substantially linear rise in a linear operational region. The inductive element is configured to saturate during discharge of the capacitor through the load, so that the saturation of the inductive element causes the current through the load to continue to rise in a substantially linear fashion.

An initiator assembly that includes a housing, a base, an exploding foil initiator and an input charge assembly. The housing defines a cavity. The base coupled to the housing and closes the cavity. The exploding foil initiator is mounted to the base and has a barrel that defines an initiation axis. The input charge assembly is received in the cavity and includes a holder and an input charge. The holder has a first axial end and a second axial end that are spaced apart along the initiation axis. The first axial end is closer to an output of the barrel than the second axial end. 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 apparatus includes a pressure device bonded to the surface of a structure at a bonding location. The vessel comprises an interior space within the vessel and a bonding surface. A bonding agent bonds the bonding surface of the vessel to a surface of the structure. A gas-emitting material is disposed within the interior space of the vessel and an initiator is arranged to activate the gas-emitting material. Upon activation of the gas-emitting material by the initiator, the pressure device produces a localized force that breaks the structure.

An initiator assembly that includes a header body, a frame member, a plurality of terminals, an initiator chip, a plurality of contacts, and a support member. The frame member is coupled to the header body and defines an interior aperture. The terminals are received through the header body and the frame member. The initiator chip is received in the frame member and has a plurality of lands, a conductive bridge and a flyer that is disposed over the conductive bridge. Each of the contacts is soldered to an associated one of the terminals and an associated one of the lands. The support member is formed of plastic and encapsulates the frame member, the plurality of contacts, and a portion of the initiator chip. The support member forms a barrel aperture over the flyer. The input charge is formed of a secondary explosive and is disposed in-line with the barrel aperture.

Methods, systems, and devices for an area-denial munition configured for self-neutralization of an explosive ordnance. In one or more embodiments the munition including a housing including a chassis defining one or more openings such that the housing is an at least partially open structure exposing an interior to an ambient environment. In various embodiments the munition includes a detonation module including a detonation initiator and a deflagration module including a deflagration initiator coupled with a pyrotechnic primer, and munition control circuitry. In various embodiments the munition control circuitry receives instructions to deflagrate the explosive ordnance and instructs the deflagration module to activate the deflagration initiator. In various embodiments, the deflagration initiator causes a deflagration of the explosive ordnance for self-neutralization of the munition resulting in safe destruction of the munition's explosive charge and control electronics.

An initiation system that includes an initiator chip having an electrically conductive bridge, a flyer layer coupled to the initiator chip and overlying the bridge, a housing, an energetic material and a lid. The housing is formed of a first plastic material that is overmolded onto the initiator chip such that the initiator chip is at least partly encapsulated into the first plastic material to thereby fixedly couple the initiator chip to the housing. The housing defines a cavity having a first end and a second, open end that is opposite the first end. The initiator chip is disposed proximate the first end of the cavity. The energetic material is disposed in the cavity. The lid is at least partly formed of a second plastic material and is fixedly and sealingly coupled to the housing to close the open end of the cavity.