Multistage thermal trigger devices disclosed herein may include a first stage and a second stage, wherein the first stage activates at a first temperature, and wherein the second stage activates at a second temperature. The first stage activates an arming assembly so that the second stage is armed. The second stage may then activate the output of the multistage thermal trigger device, via the arming assembly, when the second temperature is reached. An autoignition material (AIM) capsule is also disclosed herein. The AIM capsule may be deployed in connection with the disclosed multistage thermal trigger devices.

Embodiments are directed to a density gradient booster pellet having a proximal end, a distal end, and a central longitudinal axis spanning from the proximal end to the distal end. The density gradient booster has a plurality of density zones from the proximal end to the distal end. The proximal end is in adjacent contact with an insensitive explosive fill.

The embodiments are directed to methods of initiating insensitive explosive formulations. The disclosed methods include positioning a donor explosive pellet adjacent to an insensitive acceptor explosive pellet having a plurality of relative percent theoretical maximum density (TMD) zones. The insensitive acceptor explosive pellet is adjacent to an insensitive explosive fill. Upon donor explosive pellet initiation, the donor explosive pellet provides a shock stimulus to the insensitive acceptor explosive pellet, which initiates the insensitive acceptor explosive pellet, causing a detonation wave to be driven through the plurality of relative percent TMD zones and into the insensitive explosive fill.

Embodiments are directed to a density gradient booster pellet having a proximal end, a distal end, and a central longitudinal axis spanning from the proximal end to the distal end. The density gradient booster has a plurality of density zones from the proximal end to the distal end. The proximal end is in adjacent contact with an insensitive explosive fill.

The embodiments are directed to methods of initiating insensitive explosive formulations. The disclosed methods include positioning a donor explosive pellet adjacent to an insensitive acceptor explosive pellet having a plurality of relative percent theoretical maximum density (TMD) zones. The insensitive acceptor explosive pellet is adjacent to an insensitive explosive fill. Upon donor explosive pellet initiation, the donor explosive pellet provides a shock stimulus to the insensitive acceptor explosive pellet, which initiates the insensitive acceptor explosive pellet, causing a detonation wave to be driven through the plurality of relative percent TMD zones and into the insensitive explosive fill.

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.

Delay tools, systems and methods for achieving a selection of alternative delay times, a tool of which including a body, a drill bit operable relative to the body and a knob operably connected to the drill bit, and operably disposed relative to the body for engagement of the body with a rocket motor bulkhead and the drill both relative to a delay to provide for achieving a selection of alternative delay times.

Multistage thermal trigger devices disclosed herein may include a first stage and a second stage, wherein the first stage activates at a first temperature, and wherein the second stage activates at a second temperature. The first stage activates an arming assembly so that the second stage is armed. The second stage may then activate the output of the multistage thermal trigger device, via the arming assembly, when the second temperature is reached. An autoignition material (AIM) capsule is also disclosed herein. The AIM capsule may be deployed in connection with the disclosed multistage thermal trigger devices.

Delay tools, systems and methods for achieving a selection of alternative delay times, a tool of which including a body, a drill bit operable relative to the body and a knob operably connected to the drill bit, and operably disposed relative to the body for engagement of the body with a rocket motor bulkhead and the drill both relative to a delay to provide for achieving a selection of alternative delay times.

The invention relates to an igniter device for igniting energetic materials, more specifically to the area of the initiation of munitions, and methods of forming said ignition devices. There is provided an igniter device, for use in an explosive train, comprising a first synthetic polymer layer, a second synthetic polymer layer, wherein said first layer and second layer envelope a portion of an energetic material, wherein said synthetic polymer is capable of being sealed.