The invention relates to a device for seeding a cloud cell, comprising a pyrotechnic torch containing an active substance. The invention further relates to a pneumatic projection apparatus for projecting such a device, the apparatus comprising a guide element and a fastener, which fastener is arranged to cooperate with the distal portion of a projection base of the device. The invention also relates to a system for seeding a cloud cell.

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 present invention is directed toward an addressable ignition stage which produces an output sufficient to detonate a secondary explosive, generally. The present invention comprises addressability and ignition functions that may be used together or separately to incorporate a high-power resistor with a thermally conductive substrate allowing for operation at high temperatures for ignition. The ignition stage is amendable to high volume production, exhibits a high degree of reliability, robustness and operational dependability for use alone or configurable into existing technology.

According to various implementations, a vehicle pyrotechnic initiator assembly includes an initiator that includes at least one electrode pin and a validation device in electrical communication with the at least one electrode pin. The validation device provides validation information about at least a portion of the initiator assembly and/or a safety device in which the initiator assembly is installed. The validation information may include a date associated with an expiration of the initiator assembly and/or the safety device. The validation information may also or alternatively include a manufacturer identity associated with a manufacturer of the initiator assembly and/or safety device. In some implementations, the validation device includes an electrical circuit and/or memory that stores the validation information. For example, the validation device may include an ASIC chip.

A detonator for use in a detonating system, which detonator includes discriminating and validating arrangements which sense and validate at least one characteristic of at least one parameter produced by at least one of a light, acoustic, vibratory, magnetic or electrical signal event, and an electronic timer which executes a timing interval in response thereto.

A detonator includes a detonating capsule, a detonator head storing an electronic circuit board, and a retaining arm configured to fix the detonating capsule to the detonator head. The electronic circuit board is a multidimensional circuit board that extends from the detonator head into engagement with the detonating capsule.

A capacitive discharge unit (CDU) for detonating an explosive in response to a control signal comprises a set of CDU components, including an exploding foil initiator (EFI), a trigger circuit, a firing capacitor, and an insulated-gate bipolar transistor (IGBT) firing switch. In various embodiments the components are arranged on a board for mechanically and electrically supporting the components in an ordered arrangement along a CDU axis where the CDU having an axial length defined by the ordered arrangement of two or more of the EFI, the firing capacitor, and the IBGT firing switch, wherein the trigger circuit is offset from the CDU axis such that the trigger circuit does not contribute to the axial length.

In an aspect of the invention there is provided an integrated circuit initiator device that comprises a circuit substrate provided with an electrical insulating layer; an electrical conducting bridge circuit deposited on the insulating layer; said bridge circuit patterned as contact areas and a bridge structure connecting the contact areas, said bridge structure arranged for forming a plasma when the bridge structure is fused by a initiator circuit that contacts the contact areas; and a polymer layer that is spin-coated on the bridge structure, for forming a flyer that is propelled away from the substrate.

An ignitor for an electronic detonator, the ignitor including a microcontroller and a capacitor mounted on a printed circuit board (PCB) and electrically connected to one another, the microcontroller configured to discharge the capacitor in response to an actuation signal received by the microcontroller, a pair of conductive traces extending from the capacitor, a resistive element extending between the conductive traces and configured to radiate heat in response to current flowing therethrough, and a shroud disposed over the resistive element, the shroud containing a pyrotechnic composition that at least partially covers the resistive element.

The present disclosure relates to a primer for a personal firearm. The primer includes a primer cup including a cylindrical side wall closed at one outer end by a bottom; a pyrotechnic charge placed in the primer cup; an electrical component suitable for producing the thermal energy needed for priming the pyrotechnic charge, the charge being in contact with the electrical component; a printed circuit board, said printed circuit board having an internal face comprising the electrical component in contact with the pyrotechnic charge, characterized in that said printed circuit board forms at least in part the outer bottom of the primer cup.