Tue, 30 Jun 2015 08:00:00 EDTA rocket-propelled grenade includes a payload section, a selectable fuzing section joined to the payload section, and a propulsion section joined to the selectable fuzing section. A rocket-propelled grenade includes a propulsion section and a payload section operably associated with the propulsion section. The payload section includes a shell, one or more penetrators disposed in the shell, and a charge for compromising the shell to deploy the one or more penetrators when the charge is initiated.
Tue, 26 May 2015 08:00:00 EDTA shaped charge casing cutter is constructed with the cutter explosive formed into radial section modules aligned in a toroidal cavity between a pair of housing plates. The center sections of the plates are contiguously aligned with opposite parallel surfaces of a center disc. The plate rims are offset from respective center disc planes in opposite directions from each other to form a toroidal cavity. The toroidal cavity is enclosed by a circumferential belt secured to said plate rims. V-grooved shaped charge explosive in the form of multiple pi sections is distributed about the cavity to intimately contact a pair of frusto-conical liners.
Tue, 26 May 2015 08:00:00 EDTAn apparatus and method of launching and retrieving a ballistically launched delivery device. A replaceable bullet trap with an axial cavity may be inserted into a launch delivery tube. The launch delivery tube may be attached to a ballistic muzzle. A projectile may be fired from the ballistic muzzle through the delivery tube and into the axial cavity of the replaceable bullet trap. An impulse and momentum of mass of the projectile may be transferred from the projectile to the replaceable bullet trap and then to the launch delivery tube to launch the launch delivery tube from the ballistic muzzle.
Tue, 26 May 2015 08:00:00 EDTA case for a warhead having a plurality of elongated wires which are braided or woven together to form a mesh which is formed into the shape corresponding to the warhead case. The mesh is impregnated with a polymer matrix which, upon curing, forms a rigid warhead case. At least some of the elongated wires include notches at selected locations which form fracture points which shape a blast from a subsequent explosion of the warhead.
Tue, 26 May 2015 08:00:00 EDTAn initiator assembly that includes an initiator and a containment shell. The initiator has an initiator housing, an initiator device mounted inside the initiator housing, and an input charge that is formed of an energetic material. The initiator device is configured to initiate at least one of a combustion event, a deflagration event and a detonation event in the input charge. The containment shell is coupled to the initiator housing and defines a space into which gas and/or particles are ejected from the initiator housing if the initiator device is not activated and the input charge is cooked off.
Tue, 19 May 2015 08:00:00 EDTTiming circuits including supervisor chip(s), capacitors, and latches. The supervisor chip(s) and capacitors cooperate to generate an electrical signal (window signal) having a high logic state when the window is open. The latches are used to determine whether an event of interest occurred while the window was open using the generated window signal and an electrical signal asserted upon occurrence of the event of interest.
Tue, 19 May 2015 08:00:00 EDTA system and method for powering an air-drop device is presented. One configuration of the system includes an energy capture device, a generator and an electrical logic unit. The energy capture device converts the movement air passing by the air-drop tail device into kinetic energy. The generator converts that kinetic energy into electrical energy and the electrical logic unit can then be powered by the electrical energy allowing it to perform at least a portion of a mission.
Tue, 19 May 2015 08:00:00 EDTA rocket-propelled grenade includes a payload section, a selectable fuzing section joined to the payload section, and a propulsion section joined to the selectable fuzing section. A rocket-propelled grenade includes a propulsion section and a payload section operably associated with the propulsion section. The payload section includes a shell, one or more penetrators disposed in the shell, and a charge for compromising the shell to deploy the one or more penetrators when the charge is initiated.
Tue, 19 May 2015 08:00:00 EDTAn Ottawa Convention—compliant system that replaces the current battlefield utility provided by anti-personnel landmines. This system utilizes obscurants to inhibit and deter the enemy's ability to breach and clear ground based mine and munition systems.
Tue, 19 May 2015 08:00:00 EDTA method of making an ammunition article and associated ammunition article is provided. The ammunition article is interchangeable with standard ammunition articles and to operate in standard chambers of standard weapons systems and of the type having a casing including a sidewall that defines a casing volume within. The method includes determining a desired propellant charge volume for a given ammunition article, determining a thickness of the casing sidewall such that the casing volume substantially corresponds to the desired propellant charge volume, and forming the casing having the determined thickness.
Tue, 12 May 2015 08:00:00 EDTThe oxygen generation system includes a chemical oxygen generator that creates oxygen through an exothermic chemical reaction that creates sufficient heat to pose a serious risk to a user. The oxygen generation system therefore includes a containment layer to permit safer administration of oxygen from a chemical oxygen generator by shielding a user from and/or dissipating the heat generated by the chemical generator. The oxygen generation system may be handheld and portable for use in extreme, remote, and/or hostile conditions, locations, environments, and situations with a simple activation method easily operated under stress without any preparation or maintenance.
Tue, 12 May 2015 08:00:00 EDTAn expansion tube of a detonating pyrotechnic rupture piece is open next to pre-established rupture zones and, inside said open expansion tube there is disposed a sealed bladder which contains a pyrotechnic fuse.
Tue, 05 May 2015 08:00:00 EDTThe present invention provides a tactical light configured such that it can be propelled toward a predetermined location. The tactical light includes a housing that defines an interior space. An effects assembly is configured to be positioned within the interior space defined by the housing. The effects assembly is rotatably connected to the housing by a rotary connector. The effects assembly is configured such that it has a center of gravity that is offset from an axis defined by the rotary connectors. In this regard, a light source positioned on the effects assembly is configured to illuminate a predetermined area relative to the effects assembly and its center of gravity and independent of the position of the surface of the housing relative to effects assembly.
Tue, 05 May 2015 08:00:00 EDTA shaped charge pipe cutter is constructed with the cutter explosive material packed intimately around an axially elongated void space that is continued through a heavy wall boss portion of the upper thrust disc. The boss wall is continued to within a critical initiation distance of a half-cuter junction plane. An explosive detonator is positioned along the void space axis proximate of the outer plane of the upper thrust disc. Geometric configurations of the charge thrust disc and end-plate concentrate the detonation energy at the critical initiation zone.
Tue, 05 May 2015 08:00:00 EDTA cartridge launched in an M203/M320 gun launcher device, which cartridge has fins of 1-5 inches in length to insure flight stability without spinning the cartridge. The non spin makes the cartridge capable of having a guidance navigation and control, canard actuating system added between the body and nose. The guidance navigation and control, canard actuating system features now make the cartridge suitable for successfully attacking stationary and moving targets not heretofore possible.
Tue, 05 May 2015 08:00:00 EDTAn isolated, coaxial, high pressure feed-through fitting provides two electrical paths through a barrier. The fitting includes an outer dielectric disposed in an opening in the barrier. A conductive housing with a central through bore is disposed in the outer dielectric. An inner dielectric is disposed in the through bore in the conductive housing. A central conductor is disposed in the inner dielectric. One electrical path includes the central conductor and another electrical path includes the conductive housing. Flanged portions on the conductive housing and the central conductor bear on flanged portions of the outer dielectric and the inner dielectric, respectively, to create a high pressure seal.
Tue, 05 May 2015 08:00:00 EDTA less than lethal cartridge for a projectile which when fired has a velocity which will not kill an individual struck by the projectile. The less than lethal cartridge has a rim which is deeper or thicker than a rim on a conventional lethal cartridge. The caliber of the cartridge is also selected so that regular lethal ammunition is not available in this caliber. The preferred caliber of the less than lethal cartridge is .490. The less than lethal cartridge contains a polymeric projectile or alternatively, a sealed filled polymeric pouch containing shot therein.
Tue, 05 May 2015 08:00:00 EDTThe Broadhead-Bullet and Sabot is a new type of sub-sonic hunting projectile combining capabilities of an expandable broad head arrowhead with that of a firearm-fired projectile. The Broadhead-Bullet and Sabot is for use in shorter ranges akin to shotgun slug ranges but is able to utilize the cost effectiveness, utility, and ease of use of existing firearms.
Tue, 05 May 2015 08:00:00 EDTA gun-launched, non-lethal, anti-personnel projectile includes a variable thrust, solid propellant rocket motor. The rocket motor has a variable thrust profile that maintains a substantially constant kinetic energy of the projectile below a lethal threshold from a range of about 5 meters to about 400 meters.
Tue, 05 May 2015 08:00:00 EDTA mechanical firing adapter for an igniter, such as an M81, to enable remotely firing the igniter using a robot, such as a MTRS. MTRS are used in the disposal/disruption of IEDs. Igniters are generally used with a shock tube, a type of fuse that is used with explosive charges, like shape charges. The adapter has a base plate with a first area to secure the igniter, a second area to withdraw the igniter's pull-rod by the attached pull-ring, and a compound assembly that interfaces with a robot. The pull-ring is attached to a sled that moves rearward when a clinching force is applied to opposing paddles, which causes the connected angled articulating struts to spread open. The paddles are moved closer by a remote controlled robotic jaw, and this closing movement causes the sled to move rearward, pulling out the pull-rod, which sets off the explosive.
Tue, 05 May 2015 08:00:00 EDTAn all-fire detection circuit for an electrically initiated inertial igniter munition. The all-fire detection circuitry including: an input configured for receiving an input voltage over a duration responsive to an acceleration of the munition; an electrical storage device configured to receive a portion of the input voltage over the duration and to thereby accumulate a charge, an output coupled to the electrical storage device to deliver an all-fire indication when at least a portion of the charge exceeds a first predetermined voltage; a first diode having a first anode coupled to the input, and a first cathode; a resistor coupled in series between the first cathode and the electrical storage device; a second diode having a second anode coupled to the electrical storage device, and a second cathode; and a third diode having a third anode coupled to the first cathode, and a third cathode coupled to the second cathode.
Tue, 05 May 2015 08:00:00 EDTProvided among other things are reactive energetic material systems used for conductors in detonators for increased efficiencies. According to an embodiment, a detonator may include: a conductor including at least two constituents including (i) an electrically conductive constituent, and (ii) an electrically non-conductive constituent, that when subjected to sufficient electrical energy, result in an exothermic reaction; and a flyer plate having a non-conductive surface in contact with said conductor. When the sufficient electrical energy is supplied to said conductor, rapid heating and vaporization of at least a portion of the conductor occurs so as to explosively drive at least a portion of the flyer plate away from said conductor. In an embodiment, a multilayer conductor may be formed of alternating layers of at least one electrically conductive layer, and at least one electrically non-conductive layer, that when subjected to sufficient electrical energy, result in an exothermic reaction.
Tue, 28 Apr 2015 08:00:00 EDTA rocket is provided and includes booster stages at a rear of the nose cone, the booster stages being configured for propelling the nose cone in a propulsion direction and a divert control system housed entirely in the nose cone for controlling an orientation of the propulsion direction.
Tue, 28 Apr 2015 08:00:00 EDTA to a non-combustible, tactical flash device includes a non-spherical hollow main housing having a plurality of flat surfaces, adapted to hold internal functional components. The internal functional components include: (i.) an externally exposed activation component located on the main housing; (ii.) a power connected to the activation component and to a control chip; (iii.) the control chip also being connected to at least one speaker and at least one light source, the control chip including capabilities for delay of processing of other commands upon initiation of the activation component, and for subsequent processing of other commands including sound delivery to at least one speaker and/or light activation to at least one light source. Optionally, a beacon transmitter may also be included.
Tue, 28 Apr 2015 08:00:00 EDTA small, lightweight, and inexpensive gas generator for an airbag device. The gas generator for an airbag device according to the present invention includes: a deployment activating initiator that accommodates a predetermined amount of ignition powder and is activated by an impact on a vehicle; a main gas generating agent that generates a main gas for inflating an airbag when burned; a main gas generation chamber that accommodates the main gas generating agent; a secondary gas generation chamber that is provided in an interior of the main gas generation chamber and accommodates the initiator; and a secondary gas generating agent accommodated in the secondary gas generation chamber.
Tue, 28 Apr 2015 08:00:00 EDTA projectile designed to penetrate a liquid filled vessel and react with the liquid contained within the vessel. The projectile is formed of a narrow tapered nose portion with a thin liquid soluble casing which contains a reactive material. The nose portion is formed of spent radioactive material and is connected to an axially extending centrally positioned rod having a pressure plate on its distal end. The projectile casing contains potassium or other material which reacts with water or other liquid to create an explosion once the casing has dissolved within the vessel.
Tue, 28 Apr 2015 08:00:00 EDTAn irritation body (100, 100′) is proposed, which is formed by at least two modules (101, 102). The upper module (101) serves for acceptance of an ignition head (1) with tilt lever (3) and comprises upper blow-out apertures (8, 9). The lower module (102) is intended for acceptance of an effect-charge (11) with the effect-charge (11) being integrated in a central chamber (10) of a module (102). The chamber (10) itself is functionally connected with the upper blow-out apertures (8, 9) and also with the lower blow-out apertures (12, 18, 19, 20) in the lower module (102). The chamber (10) in the lower module (102) can, depending upon module (102), be selected in different sizes, which produces, under concomitant volume variability, output variability with defined increase in output.
Tue, 28 Apr 2015 08:00:00 EDTThis invention relates to fragmentation-beam ammunition capable of simultaneous axial and circular field destruction. The objects of this invention are providing a variable configuration axial field of the fabricated destructive elements for the reliable destruction of different types of tank threatening targets and providing for the complete destruction of the fragmentation unit following explosive charge detonation in the projectile.The technical solution according to this invention, the projectile comprises an elongated explosive charge with a detonator in the form of a rotation body with a curvilinear generatrix located coaxially with the fragmentation unit wherein said detonator is electrically connected with the fuse and said fuse comprises a device (an adapter booster) for varying the time interval between the activation of both detonators depending on the setting, said detonators comprising safety devices.
Tue, 28 Apr 2015 08:00:00 EDTThe invention relates to producing a propellant charge igniter tube (2) for a propellant charge igniter (1) by means of hydroforming (high-pressure forming). According to the present invention, a sleeve base (6) is then joined to the propellant charge igniter tube (2) by means of friction welding, for example, and vulcanized without reworking. In this context, the rubber lips of the sleeve base (6) and the propellant charge igniter tube (2) are molded on, or vulcanized, on in one operation. The vacuum-packed benites (8) and the lower part (9) of the propellant charge igniter (1) can then be mounted in the sleeve base (6).
Tue, 28 Apr 2015 08:00:00 EDTAn improved cartridge case completely produced net shape on a progressive cold former that includes a trim to lengthy station with an internal shearing tool.
Tue, 21 Apr 2015 08:00:00 EDTAn inflator including an initiator and a bulkhead molded around the initiator. The inflator includes a housing formed of two overlapping housing portions mechanically coupled together around a portion of the bulkhead. One of the housing portions includes cut tabs that are crimped into cut receivers of the other housing portion.
Tue, 21 Apr 2015 08:00:00 EDTA grenade fuze assembly includes a fuze body and a striker lever fixed to the fuze body with a pull pin. A circular pull ring is attached to the pull pin. A detent device is disposed on a top portion of the fuze body and a top portion of the striker lever. The detent device includes four sides with a boss formed on an exterior of one of the four sides. The boss includes a curved slot for receiving and holding the pull ring. A pair of opposed locking tabs on opposite interior sides of the detent device engage the top portion of the fuze body. The detent device secures the pull ring to prevent accidental removal of the pull pin when the grenade is dropped and to prevent undesired noise cause by movement of the pull pin and pull ring.
Tue, 21 Apr 2015 08:00:00 EDTAn explosive bulk charge, including: a first contact surface configured to be selectively disposed substantially adjacent to a structure or material; a second end surface configured to selectively receive a detonator; and a curvilinear side surface joining the first contact surface and the second end surface. The first contact surface, the second end surface, and the curvilinear side surface form a bi-truncated hemispherical structure. The first contact surface, the second end surface, and the curvilinear side surface are formed from an explosive material. Optionally, the first contact surface and the second end surface each have a substantially circular shape. Optionally, the first contact surface and the second end surface consist of planar structures that are aligned substantially parallel or slightly tilted with respect to one another. The curvilinear side surface has one of a smooth curved geometry, an elliptical geometry, and a parabolic geometry.
Tue, 21 Apr 2015 08:00:00 EDTA non-spinning 40 mm ammunition round for firing in an M320 grenade launcher. The round includes a cylindrical shaped gun sleeve cartridge case, which covers the standard rifling inside the M320, and thus presents a smooth bore surface to the fired ammunition. Because the ammunition is not launched in a spinning mode, it may now comprise those guidance and camera components as may be desired which components would not have been possible to employ on a round that is spinning.
Tue, 21 Apr 2015 08:00:00 EDTA pyrotechnic launcher that comprises at least one pyrotechnic launching tube (1), at least one frame which comprises cover (2), and in which said pyrotechnic launching tube (1) is prepared for housing inside it at least one pyrotechnic device (8); in which said pyrotechnic launching tube (1) comprises at least two openings located at its top and bottom ends that enable the introduction and deployment of the pyrotechnic device (8), both through its top opening and its bottom opening, in which at least one locking element (3) holds said pyrotechnic device (8); and in which the internal face of said pyrotechnic launching tube (1) comprises some interlocking means (17a) which enable locking said pyrotechnic device (8) in a direct manner or by means of an intermediate element, through some locking means (17b, 17b′) pertaining to said pyrotechnic device (8).
Tue, 21 Apr 2015 08:00:00 EDTA surface blasting product which includes a container, a receptacle which contains adhesive which is displaceable to adhere the container to a rock, and an explosive charge, inside the container, which can be ignited to fragment or displace the rock.
Tue, 14 Apr 2015 08:00:00 EDTA weapon and weapon system, and methods of manufacturing and operating the same. In one embodiment, the weapon includes a warhead having destructive elements. The weapon also includes a folding lug switch assembly that provides a mechanism to attach the weapon to a delivery vehicle and is configured to close after launching from the delivery vehicle, thereby satisfying a criterion to arm the warhead. The weapon still further includes a guidance section including an antenna configured to receive mission data before launching from the delivery vehicle and further configured to receive instructions after launching from the delivery vehicle to guide the weapon to a target.
Tue, 14 Apr 2015 08:00:00 EDTA detonator (14) has a printed circuit board (18) with conductive contact pads (26) which are electrically connected to conductors (32, 34) by means of a compression-type fitting. The compression-type fitting includes a cover (40), a seal (46) and a locking member (54) through which the electrical conductors in the form of a cable (12) are slidably threaded in the stated order. The detonator (14) has at its trailing end (24) a wedge-shaped part (28) having a serrated surface (28A). Locking member (54) has a tapered cavity (56) having a serrated surface (56A). Cover (40) is slid along cable (12) to force locking member (54) into locking engagement with wedge-shaped part (28) to hold conductors (32, 34) in contact with contact pads (26).
Tue, 14 Apr 2015 08:00:00 EDTProvided is a gas generator which is reduced in weight and size while maintaining a sufficient strength as a pressure vessel. A gas generator (1) includes a housing (4) in a tubular shape having an opening (10) on at least one end thereof and a plug (12) inserted in the opening (10), so that an end portion (11) on the opening side is reduced in diameter and caulked in a caulking groove (13) of the plug (12), to thereby seal the opening (10), in which: the caulking groove (13) is a streak groove that extends along the periphery of the plug (12) and is rectangular in section; and the caulking groove (13) has at least one of side walls (14) forming the calking groove (13), the one side wall (14a) being closer to the center of the housing, which is orthogonal or sloped to the opening side, with respect to the axis (X) of the housing (4).
Tue, 14 Apr 2015 08:00:00 EDTThe invention relates to a projectile having a cylindrical hole (15) arranged at the nose as seen in the firing direction, said hole (15) extending coaxially with the longitudinal axis (12) of the projectile and a projectile nose (1) being inserted into this hole, wherein the longitudinal axis (12) of the projectile at the same time also forms the longitudinal axis of the projectile nose (1). In order that accelerated expansion of the projectile occurs when the projectile strikes a soft medium, it is proposed according to the invention that an open hollow channel (5) is introduced in the projectile nose (1) coaxially with the longitudinal axis (12), said hollow channel (5) extending from the front end (22) to the rear end (23) of the projectile nose (1), as seen in the firing direction, and a membrane (6) is arranged in the hollow channel (5), said membrane dividing the hollow channel (5) into two hollow-channel portions (5a, 5b).
Tue, 14 Apr 2015 08:00:00 EDTA high strength polymer-based cartridge casing includes an upper component of polymer, a bullet of a standard weight, a lower component of polymer, and an insert. The upper component has a shoulder portion and an upper component inner wall has a first diameter extending from the shoulder. The lower component has a lower component inner wall having a second diameter. The upper and lower component inner walls form a propellant chamber; and the first and second diameters reduce a volume of the propellant chamber. The reduced volume of the propellant chamber permits only enough propellant to propel a bullet engaged in the cartridge casing at subsonic speeds.
Tue, 07 Apr 2015 08:00:00 EDTA gas generator containing perforate internal chambers, each chamber in vapor communication with at least one other chamber in the gas generator, is provided. When granulated compositions are utilized in one or more of the chambers, permeable materials such as cheesecloth, neoprene, Tyvek™, metal or non-metallic screen, and other suitable fluid permeable materials, may be provided to physically seal the perforations of the various chambers, thereby separating the granulated composition(s) contained therein. In this way, off-gas products formed naturally over time may be effectively managed to ensure expected performance criteria of the associated inflator.
Tue, 07 Apr 2015 08:00:00 EDTA guided munition (10) includes a warhead (20) within the nose section (60) and processing electronics (30) arranged within the munition (10) behind the warhead (20). A plurality of sensors (50) are arranged within the nose section (60) for sensing a target. The sensors (50) are remote from but in communication with the processing electronics (30).
Tue, 07 Apr 2015 08:00:00 EDTA bullet is formed with a hollow interior compartment which contains particles. The bullet side-wall surrounding the hollow interior compartment breaks after impact with the target to release the particles from the hollow interior compartment. Preferably, each particle in the hollow interior compartment has a core substance and a coating surrounding the core substance. The coating is designed to release the core substance after the bullet contacts a target. The core substance swells when in contact with blood, which may be time delayed in order to enter the blood stream.
Tue, 07 Apr 2015 08:00:00 EDTA weapon and weapon system, and methods of manufacturing and operating the same. In one embodiment, the weapon includes a warhead having an outer casing. The warhead includes a frangible container within the outer casing of the warhead and a destructive element within the frangible container. The destructive element is formed with a non-explosive material. The weapon may also include a guidance section configured to direct the weapon to a target.
Tue, 31 Mar 2015 08:00:00 EDTA binary exploding target package, a process of forming an exploding target from the contents of the binary exploding target package, and the exploding target formed therefrom. The binary exploding target package includes a first, target container and a second container. An oxidizer composition is contained within one of the containers and a catalyst composition is contained within the other container. An exploding target is formed by mixing the oxidizer and catalyst compositions, and introducing the mixture into the target container to form an exploding target just prior to using the exploding target as a target for a shooting exercise.
Tue, 31 Mar 2015 08:00:00 EDTA system for programming and lighting electronic detonators (1) each having an identifier (IDdet) associated therewith, includes: a programming unit (20) arranged to determine the identifiers of the detonators (1) and to associate the detonators individually, in memory, with a lighting time delay (Tdet) in order to form a blasting pattern (PT); a blasting unit (10) arranged to recover the blasting pattern (PT) from the memory (280) of the programming unit (20), and to control a blasting sequence of the detonators according to the recovered blasting pattern; and the programming unit (20) includes: a passive RFID tag (28) provided with a chip (280) acting as a memory for storing the blasting pattern (PT), and a radiofrequency reader (27) arranged such as to read/write passive tags. A corresponding method is also described.
Tue, 31 Mar 2015 08:00:00 EDTA spinning, rolling, or roll-stabilized vehicle, such as a projectile, includes a fuselage that rotates about its longitudinal axis (spins) during flight. A collar is positionable relative to the fuselage to steer the projectile, with the collar having ailerons to provide a roll force to position the collar. The collar also has elevators to provide lateral force to steer the projectile. The positioning of the collar may be accomplished by moderating the roll force of the ailerons to hold the position of the collar substantially constant with regard to a longitudinal axis of the projectile. The ailerons passively change angle of attack with changes in the dynamic pressure of the projectile. At low speeds the ailerons have a relatively large angle of attack, and at high speeds, the ailerons resiliently reduce their angles of attack, avoiding large rolling forces on the collar.
Tue, 31 Mar 2015 08:00:00 EDTA delay release device that connects to an aerosol filled canister that releases the aerosol in a delayed manner. The device includes a main body with a first plunger assembly mounted on one end. Formed adjacent to the first plunger assembly is a first chamber filled with a compressed gas pressurized from 40 to 150 psi based on the time delay desired. In the main body adjacent to the first chamber is a second chamber and a third chamber. Located inside the third chamber is a second plunger with a hollow stem introduced into a top valve assembly on the canister. To activate, the first plunger assembly is pressed inward which activates a second valve disposed between the first and second chambers. The second valve allows compressed gas to flow slowly from the first chamber into the second chamber and into the third chamber. The increased air pressure in the upper portion of the third chamber exerts a downward force on the second plunger which forces the hollow stem into canister and causes the aerosol gas to be released into a lower discharge chamber and then through holes formed on the main body.
Tue, 31 Mar 2015 08:00:00 EDTA detonator assembly (10) which includes a housing (16), an explosive (20) in the housing (16), an initiating element (32) exposed to the explosive (20), a circuit for controlling operation of the initiating element (32), and a communication arrangement which can establish communication between the circuit and an external controller (60) at least at one optical frequency.