Disclosed is a method for firing an electronic detonator including a power storage unit including receiving, via the electronic detonator, a firing order. The following steps are implemented as long as the delay time associated with the electronic detonator has not elapsed since the reception of the firing order: measuring power stored in the power storage unit, and firing the electronic detonator when the measured stored power is less than or equal to a predetermined power.

Disclosed are an airburst munition and an airburst signal transfer device. By simply signaling information regarding a distance to an explosion location of the airburst munition to an explosion control system inside the airburst munition while the airburst munition passes through a tubular body of the airburst signal transfer device, it is possible to easily, simply, and automatically enter the information regarding the distance to the explosion location of the airburst munition to the airburst munition using the airburst signal transfer device.

Disclosed are an airburst munition and an airburst signal transfer device. By simply signaling information regarding a distance to an explosion location of the airburst munition to an explosion control system inside the airburst munition while the airburst munition passes through a tubular body of the airburst signal transfer device, it is possible to easily, simply, and automatically enter the information regarding the distance to the explosion location of the airburst munition to the airburst munition using the airburst signal transfer device.

A system and a method of providing a reliable and consistent time delay in an oil and gas exploration/recovery device inserted in a bore hole is presented. The reliability and consistency of the time delay is a result of the use of electronic circuitry in determining the length of time delay. The system and method presented provide a time delay unit that is modular/commoditized, facilitating quick and easy integration of each component of the time delay unit in the field. Further, assembly and disassembly of the time delay unit is easily accomplished in the field and may be designed to operate with standard percussion and detonation elements.

A system and a method of providing a reliable and consistent time delay in an oil and gas exploration/recovery device inserted in a bore hole is presented. The reliability and consistency of the time delay is a result of the use of electronic circuitry in determining the length of time delay. The system and method presented provide a time delay unit that is modular/commoditized, facilitating quick and easy integration of each component of the time delay unit in the field. Further, assembly and disassembly of the time delay unit is easily accomplished in the field and may be designed to operate with standard percussion and detonation elements.

A digitally controlled hand-tossable explosive delivery receptacle comprises a ruggedized reusable compartment enclosing a digital circuit and a disposable cartridge holding one or more explosive chemical agents and a primer. The disposable cartridge is configured to be mounted to the ruggedized reusable cartridge, and a high-strength bulkhead incorporated into the reusable or disposable compartment that separates the digital circuit from the chemical agents. The reusable compartment is sufficiently ruggedized to withstand the ignition of the primer and the detonation of the chemical agents to be reused with one or more additional disposable cartridges. In one implementation, the delivery receptacle uses a commercial airbag initiator as the primer, which is arranged in relation to the one or more chemical agents so that when the initiator is activated, it generates a pressure wave that expels the one or more chemical agents from the grenade.

A nonlethal projectile includes a debilitating material for immobilizing a target. The projectile is capable of self-separating or otherwise opening after launch by a launcher to release the debilitating material prior to impact with a target. The launcher is capable of initiating separation of the projectile. Opening may also be accomplished by a control circuit with a radio-frequency identification (RFID), where an RFID tag in the projectile causes the projectile to open at a user-specified distance from the launcher or by the force of launch on the projectile. A magazine may hold a plurality of projectiles and the various projectiles of the magazine may be configured to open at different distances and/or times after launch. The launcher may include a trigger and/or a safety switch to prevent the projectile from becoming armed until a certain parameter is met. The debilitating material may also be released through pores in the projectile.

A nonlethal projectile includes a debilitating material for immobilizing a target. The projectile is capable of self-separating or otherwise opening after launch by a launcher to release the debilitating material prior to impact with a target. The launcher is capable of initiating separation of the projectile. Opening may also be accomplished by a control circuit with a radio-frequency identification (RFID), where an RFID tag in the projectile causes the projectile to open at a user-specified distance from the launcher or by the force of launch on the projectile. A magazine may hold a plurality of projectiles and the various projectiles of the magazine may be configured to open at different distances and/or times after launch. The launcher may include a trigger and/or a safety switch to prevent the projectile from becoming armed until a certain parameter is met. The debilitating material may also be released through pores in the projectile.

The system and method for accurately determining range-to-go for a time-delayed command detonation of a projectile. Using dual laser and/or radio frequency detectors on the tail and on the nose of a spinning projectile to determine the range-to-go, time-to-go, and/or lateral offset from the projectile to the target. A time to detonation clock is used to determine when a projectile transitions from an exterior to an interior of a structure such that the projectile can more accurately detonate within a fixed structure.

A sensor assembly for use in actuating an electronic detonator in response to a shock tube event propagated through a shock tube, the sensor assembly including support, and at least one sensor on a surface of the support, the support being configured to position the at least one sensor displaced laterally from a line of action of the shock tube event.