A detonator assembly method wherein a base charge is placed into a tube to abut a closed end of the tube, an electronic module is positioned inside the tube, a displacement member with a stop formation is used to move the module, against a frictional restraining force, to a location at which the stop formation abuts a rim of the tube and wherein the module is held in position by deforming the tube into engagement with the module.

A detonator assembly method wherein a base charge is placed into a tube to abut a closed end of the tube, an electronic module is positioned inside the tube, a displacement member with a stop formation is used to move the module, against a frictional restraining force, to a location at which the stop formation abuts a rim of the tube and wherein the module is held in position by deforming the tube into engagement with the module.

Embodiments of the present invention include a method for preparing and applying a slurry mixture to a bridge wire initiator which involves a slurry mixture that is relatively safer for a user to handle and in which the method is relatively less complex and shorter in duration for a user to prepare and apply the slurry mixture to the bridge wire initiator.

Embodiments of the present invention include a method for preparing and applying a slurry mixture to a bridge wire initiator which involves a slurry mixture that is relatively safer for a user to handle and in which the method is relatively less complex and shorter in duration for a user to prepare and apply the slurry mixture to the bridge wire initiator.

An initiator assembly that includes a housing assembly, an exploding foil initiator, an input charge and an output charge. The housing assembly defines a first cavity, a second cavity, and a bulkhead member between the first and second cavities. The exploding foil initiator is received in the housing assembly and includes a bridge, a flyer and a barrel. The flyer overlies the bridge and is disposed between the barrel and the bridge. The barrel defines a barrel aperture. The input charge, which is formed of a secondary explosive, is received in the housing assembly and is disposed in-line with the barrel aperture. The output charge assembly is received in the housing assembly and is formed of a secondary explosive. Energy released from detonation of the input charge in response to operation of the exploding foil initiator penetrates the bulkhead and initiates detonation of the output charge.

An initiator assembly that includes a housing assembly, an exploding foil initiator, an input charge and an output charge. The housing assembly defines a first cavity, a second cavity, and a bulkhead member between the first and second cavities. The exploding foil initiator is received in the housing assembly and includes a bridge, a flyer and a barrel. The flyer overlies the bridge and is disposed between the barrel and the bridge. The barrel defines a barrel aperture. The input charge, which is formed of a secondary explosive, is received in the housing assembly and is disposed in-line with the barrel aperture. The output charge assembly is received in the housing assembly and is formed of a secondary explosive. Energy released from detonation of the input charge in response to operation of the exploding foil initiator penetrates the bulkhead and initiates detonation of the output charge.

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 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 igniter with a charge sleeve is provided with a through hole having a cylindrical wall, a bridge wire extending at least partially within the through hole, and a consolidated ignition powder charge retained within the through hole of the charge sleeve such that the bridge wire is at least partially embedded in the ignition powder charge. The cylindrical wall comprises at least one of i) a protrusion embedded into consolidated ignition powder charge, ii) a dimple filled with the consolidated ignition powder charge, and iii) at least 2 cylindrical wall sections that are eccentric to each other. The at least one of the protrusion, dimple and 2 cylindrical wall sections positively interlock with the consolidated ignition and output powder charge to prevent the charge both from moving in a radial direction in relation to the bridge wire and from rotating in relation to the bride wire.

An igniter with a charge sleeve is provided with a through hole having a cylindrical wall, a bridge wire extending at least partially within the through hole, and a consolidated ignition powder charge retained within the through hole of the charge sleeve such that the bridge wire is at least partially embedded in the ignition powder charge. The cylindrical wall comprises at least one of i) a protrusion embedded into consolidated ignition powder charge, ii) a dimple filled with the consolidated ignition powder charge, and iii) at least 2 cylindrical wall sections that are eccentric to each other. The at least one of the protrusion, dimple and 2 cylindrical wall sections positively interlock with the consolidated ignition and output powder charge to prevent the charge both from moving in a radial direction in relation to the bridge wire and from rotating in relation to the bride wire.