36 results about "Explosive train" patented technology

A two-stage acceleration sensing apparatus is disclosed which has applications for use in a fuze assembly for a projected munition. The apparatus, which can be formed by bulk micromachining or LIGA, can sense acceleration components along two orthogonal directions to enable movement of a shuttle from an “as-fabricated” position to a final position and locking of the shuttle in the final position. With the shuttle moved to the final position, the apparatus can perform one or more functions including completing an explosive train or an electrical switch closure, or allowing a light beam to be transmitted through the device.

A fuze explosive train device for detonating a munition that uses a stab firing pin within a pressure cartridge, with the stab firing pin located between a gas generator and a stab detonator. The firing pin is capable of transferring an energy from the gas generator into the stab detonator in a manner that initiates the stab detonator to a high order explosive reaction. A method of initiating a stab detonator using a stab firing pin also is disclosed.

The present invention relates to a device for electronically arming and firing a MEMS-scale interrupted explosive train to detonate a main charge explosive. The device includes a MEMS slider assembly housing a transfer charge electrically actuated to move between safe and armed positions of the explosive train.

A MEMS fuze having a moveable slider with a microdetonator at an end for positioning adjacent an initiator. A setback activated lock and a spin activated lock prevent movement of the slider until respective axial and centrifugal acceleration levels have been achieved. Once these acceleration levels are achieved, the slider is moved by a V-beam shaped actuator arrangement to position the microdetonator relative to a secondary lead to start an explosive train in a munitions round.

A single stage kinetic energy warhead using multiple explosively formed projectile (EFP) liners in a stacked configuration is capable of breaching intermediate barriers and defeating a primary target. The main explosive charge is detonated and the subsequent shockwave causes the front liner to be shaped to breach an intermediate barrier. The main liner is formed into a more compact rod-shaped projectile designed to defeat the main target. The weight and volume of the stacked liner configuration of the present system is significantly lower than the weight and volume of current systems. The present system requires a single firing explosive train eliminating developmental cost and complex fusing. The present system utilizes explosive detonation, simplifying the delivery of a projectile and eliminating the need for a missile delivery system. The size and simplicity of the present system allows for portability and use by an individual.

A primer adapter allows hand grenade fuzes of different configurations to use the same primer for the ignition of their explosive trains.

A method of forming a very small, i.e. microliter, finely detailed explosive train for the ignition of energetic munitions—which train is formed by ink jetting picoliter volume droplets of an explosive ink onto the substrate; which explosive ink is a pure liquid that will not clog the ink jet printer. The explosive ink being a solution composed of a secondary organic explosive solute, a polymeric binder solute, and a polar aprotic organic solvent. Where the ink jet printer is a commercial piezoelectric type, drop-on-demand, ink jet printer capable of precisely delivering the subject picoliter volume droplets. And, which printer is capable of heating said substrate to an elevated temperature to more rapidly evaporate the solvent, leaving the desired, finely detailed, efficacious, crystalline explosive train.

A lightweight linear explosive disruption tool that may be used to fire a high speed projectile at a hazardous device in order to separate the components of the explosive train, thereby rendering it safe. The linear explosive disruption tool utilizes open cellular foam materials to prevent collateral damage of explosive gases and fragmentation that would otherwise prevent the device from being fired from a robot. An internal clapper tube distributes forces to the ligaments of cellular foam material and an external support tube contains the explosive fragmentation and blast overpressure. An internal barrel provides projectile travel in a single precision oriented direction and also reduces recoil which also enables the device to be fired from a robot as well. Such a tool prevents explosive gases and fragmentation from causing unnecessary collateral damage to the surroundings or supporting robot with reduced recoil effects.

An auxiliary safety mechanism for a grenade to prevent detonation from shockwaves, heat, fragments, etc., the grenade including a fuse housing containing a delay detonator and explosive train. In at least one embodiment, the fuse housing includes a reversible slider element interposed between the delay detonator and the rest of the explosive train to form a barrier therebetween when the grenade is in an unarmed condition, and when the slider element is withdrawn the barrier between the delay detonator and explosive train is removed leaving the grenade in an armed condition. In another embodiment, a further safety mechanism involves connecting the two sections of the housing with a weak connection that ruptures prior to the explosive contained therein reaching the critical explosive temperature/pressure.

A safing and arming (SA) system and method for a bore-launched projectile is provided. The SA system includes an arming switch, including a detonator, movable from a first position to a second position. When the arming switch is in the first position, the detonator is separated from an explosive train of the projectile. When the arming switch is in the second position, the detonator is substantially aligned with the explosive train, allowing the projectile to be armed. Safing systems are provided for retaining the arming switch in the first (safe) position. Various embodiments also allow for release of the arming switch so as to allow the arming switch to be moved to the second (armed) position, wherein the release may be triggered by a selected acceleration force exerted on the projectile and/or a determination that the projectile has been launched from the launch bore.

The present invention generally concerns a nano-enhanced explosive that is integrated at many points across an explosive train. More specifically, a nano-enhanced explosive is formed when a nanocomposite we call nMx is combined with a secondary high explosive. nMx is made of Li₃AlH₆ nanoparticles, elemental Al nanoparticles, an amount of Ti metal, and a nanoscale organic layer having unique burning profiles that lend energy to the explosive process including increased shockwave propagation through a chemical explosive and increased temperatures and gaseous pressure build up and release in and about the same. Our nano-enhanced explosive can be integrated at various points across an explosive train, e.g. use within a detonation cord (fuse), or as a detonation charge (initiator), or as the main charge, where the use of the nano-enhanced explosive can be characterized by the energy lent to projectiles from munitions, bubbles formed by underwater explosive trains, or blast profiles.

A detonator device includes a mechanism for shifting between an out-of-line orientation, wherein initiation of a detonator does not result in initiation of the explosive train, and an in-line orientation, wherein initiation of the detonator results in initiation of the explosive train.

The invention discloses a rotating bomb fuse explosion propagation isolation mechanism capable of realizing explosive treatment and insensitive characteristics. The rotating bomb fuse explosion propagation isolation mechanism comprises an isolation medium, a cover cap and an isolation seat. The cover cap and the isolation seat form a closed cavity for accommodating the isolation medium, and the isolation medium is not filled but a part of the cavity is reserved. The rotating bomb fuse explosion propagation isolation mechanism is located between a detonating tube and a booster tube. If the fuse detonating tube does not work normally, after a projectile falls to the ground and stops moving, due to the fact that no centrifugal force exists, the isolation medium closes an explosion energy-gathered jet explosion channel formed between the detonating tube and the booster tube due to rotation under the action of gravity; therefore, even if the detonating tube explodes due to accidental ignition of detonating sequence sensitive explosion elements such as a detonator, the booster tube cannot be detonated; and if the detonating tube is accidentally ignited due to baking of the fuse and impact of bullets, jet flow or fragments during service treatment, the isolation medium can prevent the detonating tube from detonating and does not detonate the detonating tube; The rotating bomb fuse explosion propagation isolation mechanism capable of realizing the explosive treatment and insensitive characteristics can be matched with various rotating bomb instant firing, near-explosion or air-explosion fuses, and the original structure is not changed and is only increased by about 5-10mm.

The presently disclosed technique pertains to in-line explosive trains, and, more particularly, to a dynamic switch for use in an in-line explosive train. In a first aspect, the presently disclosed technique includes a method for use in arming an in-line explosive train comprising: arming two S&A circuits independently of one another; transitioning each arming circuit to a dynamic control start state to initiate a pair of state machines, each state machine associate with a respective one of the S&A circuits; transitioning through the states of the state machine to turn a switch on and off. In a second aspect, the presently disclosed technique includes a dynamic safety switch for use in an in-line explosive train comprising: a pair of S&A circuits; a pair of state machines entering a predetermined cycle upon indication to arm from both the S&A circuits and cooperatively transitioning through the cycle; and a switch controlled by the cooperative transition of the state machines.

The invention discloses a deformable energy-collecting cutting device for fence breaking and belongs to the technical field of ammunition. The cutting device comprises two acting units, a detonation transmission sequence, a detonator and elastic clamping sleeves; the two acting units are connected through the detonation transmission sequence, and the acting units are connected to fence rods through the elastic clamping sleeves fixedly connected with the acting units; and the detonator is installed on one of the acting units, and the detonator receives an external detonation signal and transmits the detonation signal to the other acting unit through the detonation transmission sequence, so that explosives in the two acting units are synchronously detonated, and energy generated by the explosives realizes cutting damage to a fence. According to the device, the fence is cut and damaged by the energy-collecting effect of the explosive charge, the device can cut the fence rods on both sidesseparately, and can also cut each certain fence rod from opposite sides or the same side, and therefore a fence door can be quickly and efficiently broken and disassembled.

A Safe-and-Arm system for the prevention of unintentional operation of an explosive device by interrupting a detonation train, the system employing an interruptive transfer assembly made of silicon and suitable for implementing in a MEMS device, the assembly including a silicon based transfer charge carrier on a porous explosive passageway made by etching, the passageway extending between at least two ports on the circumference of the transfer assembly, and a drive means that can mechanically bring about at least one armed state of a detonation train.

The invention discloses a device for controlling multi-point detonation transmission sequentiality of a detonating cord. The device comprises a base plate, a copper-clad plate and an electrode plug are arranged on the base plate, multiple rows of metal bridge membranes are arranged in the middle of the base plate, and are connected in sequence to form a detonation network, multiple booster explosives are arranged on each row of metal bridge membranes, a positive electrode and a negative electrode are arranged on the base plate, and are connected with the center of a detonating network, the different rows of metal bridge membranes select different metal materials or under the condition that the metal materials are certain, different bridge film thicknesses are selected, through the differences of specific resistance of the metal bridge membranes, the sequentiality detonation transmission can be achieved, through the non-linear distribution characteristics of specific resistance under the micron scale, the metal membrane material, thickness and length are controlled to achieve multi-point detonation transmission sequentiality of the detonating cord, the detonation transmission sequentiality is manually controllable, the detonation transmission manner is intelligent, and the disorder of the prvious detonation transmission can be solved.