A detonator includes a substrate, a controller mounted to the substrate, and a sensor coupled to the controller to measure a temperature, pressure, acceleration or other environmental parameter of the detonator. The controller is configured to transmit the measured environmental parameter from the detonator to a remote master controller, execute an action in response to a value of the measured environmental parameter, and/or prevent or modify at least one detonator function in response to the value of the measured environmental parameter.

A detonator includes a substrate, a controller mounted to the substrate, and a sensor coupled to the controller to measure a temperature, pressure, acceleration or other environmental parameter of the detonator. The controller is configured to transmit the measured environmental parameter from the detonator to a remote master controller, execute an action in response to a value of the measured environmental parameter, and/or prevent or modify at least one detonator function in response to the value of the measured environmental parameter.

A base part intended for producing a cartridge case has a case base for receiving a primer, wherein a peripheral extractor recess is provided on the outer circumference of the base part. To simplify production, the extractor recess has a polygonal geometry that is formed in cross section by a closed traverse.

A device for depositing paste patterns on the surface of the channel of a tube, the device comprising a frame supporting a first mechanical assembly for holding, positioning and moving the tube, and a second mechanical assembly for extruding paste for depositing said paste patterns, the assemblies cooperating with one another.

A modified bullet cartridge having a score line formed around a primer bore. The score line may be positioned symmetrically or asymmetrically about the primer bore. The score line may have a regular or irregular two-dimensional geometric shape. A modified bullet cartridge having a counter-bore formed superposed about a primer bore. The counter-bore may have a vertical counter-bore extension and/or a radial counter-bore extension. Adhesive is positioned in the counter-bore about a primer secured in the primer bore. The primer may have a radial flange extending radially from an exterior sidewall of the primer. The flange registers against a bottom surface of the counterbore, or within a radial flange extension if present. Adhesive is used to lock the primer flange against the counter-bore and/or radial counter-bore extension. The combination of the counter-bore, adhesive and optionally the flanged primer locks the primer to the bullet cartridge to render the cartridge unusable after one use. The bullet cartridge is rendered waterproof with the use of the adhesive.

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.

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.

A downhole explosive detonation comprises a high voltage electro-explosive initiator comprising an input high voltage power supply with a low impedance shunting fuse, a flexible electrical link and a capacitor discharge unit. Explosive is initiated in a direction approximately parallel, or in another version perpendicular to the capacitor discharge unit. A unique configuration and construction of the assembly allows installation through a small service port in the gun housing structure for more efficient gun arming. A real time downhole voltage monitoring is described that transmits voltage readings to the surface during a firing sequence.

A downhole explosive detonation comprises a high voltage electro-explosive initiator comprising an input high voltage power supply with a low impedance shunting fuse, a flexible electrical link and a capacitor discharge unit. Explosive is initiated in a direction approximately parallel, or in another version perpendicular to the capacitor discharge unit. A unique configuration and construction of the assembly allows installation through a small service port in the gun housing structure for more efficient gun arming. A real time downhole voltage monitoring is described that transmits voltage readings to the surface during a firing sequence.

One embodiment of the present invention provides a polymeric ammunition having a metal injection molded primer insert.