Abstract: A blasting cap initiator system has a main housing with an imperforate lower wall, parallel side walls, and front and rear walls. An L-shaped locking slot is formed centrally in one side wall with a trigger recess formed in the top wall adjacent the rear wall and a cylindrical bore extending from the rear wall through the front wall. A firing pin is mounted for reciprocal movement within the bore between a retracted orientation and an advanced orientation. The firing pin has a centrally located circumferential groove. A trigger is pivotably mounted in the trigger recesses movable between a locking orientation with a finger engageable with the groove and a raised orientation to a disengage orientation. A pair of axial coil springs between the rear wall and the cylinders independently allow the advancement of the cylinders.

Abstract: The invention relates to a pyrotechnic smoke screen unit for producing an aerosol which is impenetrable in the visible, infrared and millimetric wave range and used for camouflage and decoy purposes. The units are obtained by combining fibre-like conductive dipoles or dipole precursors which become conductive in situ and conventional pyrotechnic smoke substances active in the visible and infrared range.

Abstract: A vessel for a gas generator is formed of a cylindrical body, and at least one partition wall situated inside the body to divide the interior of the body into a plurality of chambers. The partition wall has a plastic deforming portion at an outer periphery thereof, which closely contacts an inner peripheral surface of the vessel by causing plastic deformation in a diameter-increasing direction. The partition wall can be easily secured to the vessel, and the vessel can be manufactured at a low cost.

Abstract: There is provided an electrically powered augmenter device that has a silicon window. The silicon window emits the infrared radiation from the augmenter in a specific waveband, to attract heat seeking missles. Moreover, the augmenter may be mounted on the fuselage of an unpowered aerial towed target or other airborne vehicle.

Abstract: A liner for a shaped charge formed from a mixture of powdered heavy metal and a powdered metal binder. The liner is formed by compression of the mixture into a liner body shape. In the preferred embodiment of the invention, the mixture comprises a range of 90 to 97 percent by weight of powdered heavy metal, and 10 to 3 percent by weight of the powdered metal binder. In a specific embodiment of the invention, a lubricant is intermixed with the powdered metal binder to aid in the formation of the shaped charge liner. The preferred powdered heavy metal is tungsten, and the preferred powdered metal binder is copper. The powdered metal binder can be comprised of other malleable ductile metals such as bismuth, zinc, tin, uranium, silver, gold, antimony, cobalt, zinc alloys, tin alloys, nickel, or palladium.

Abstract: A system for guiding projectiles to a target. More particularly, a system for the guidance of projectiles toward a target using a photo detector array (18) and an arrangement of single use thrusters (22). The system is capable of guiding projectile to targets after firing from extended distances.

Abstract: A floatable firework device includes a hollow base for fitting an explosive therein, a waterproof fuse, and a tubular buoyancy member sleeved fixedly around an upper portion of the base. The base has a center of gravity at a lower end portion thereof. As such, the firework device can float on a water surface, with a flame-spraying upper end slit in the base being disposed above the water surface.

Abstract: An explosive delay assembly including a housing, the housing includes a continuous elongated sidewall surrounding a region bounded at one end by a top surface, the top surface including an aperture configured for accepting an end booster where the end booster is attached to a ferrule assembly, the end booster and ferrule assembly connected to form a mild detonating fuze including an explosive charge. The elongated sidewalls include a groove emanating from the aperture and threading around the continuous elongated sidewall to a bottom surface and connected to a channel running from the bottom surface to the top surface. The ferrule assembly is wound around the housing within the groove and inserted into the channel to terminate at a top surface region counterbore. The counterbore is filled with an explosive charge.

Abstract: This invention relates to a method of delivering a water-based explosive by feeding a water-based explosive and a fluid non-explosive carrier into a tubular delivery member in order that the water-based explosive defines a plurality of bodies separated from each other by the carrier. The method further includes the step of feeding the bodies of water-based explosive separated by the carrier through the tubular delivery member to a point of delivery. The invention also relates to a system for delivering a water-based explosive especially to a system for carrying out the above method.

Abstract: An explosive system is disclosed which may be used in repair of damaged casing. In a described embodiment, an explosive system includes a flexible elongated tubular container with a liquid explosive disposed within the container. As an alternative, the liquid explosive may be flowed into a wellbore without being retained within a container. The liquid explosive is detonated in the wellbore, thereby fragmenting the damaged casing and forcing it out into a formation surrounding the wellbore.

Abstract: A time delay latch device of the arming assembly of a delay fuze which replaces the current system in support of the U.S. Navy Mine Clearing Program. The time delay mechanism is a mechanical run-away escapement having a one-half pound release force that unlatches an 800-pound load. The mechanical force reduction mechanism that makes up the latch device consists of 10 components rather than the existing 31 and a pyrotechnic time delay mechanism consisting of two components in lieu of the existing 14. Hence, the latch device taught herein provides not only the requisite delay and required latch release force but also reduces the total number of components from 44 to 12; thus creating significant cost savings in manufacturing. Time delay latch mechanism is located within the ram shaft that holds the ram shaft spring captive between the ram shafts and housing. The latching mechanism for the ram shaft comprises two ball detents located within the ram shaft and held in place by the housing.

Abstract: The present invention relates to a blasting method of rock, by which blasting nuisances can be reduced and blasting efficiency increased. The method utilizes a blasting mechanism comprising the steps of: successively drilling a plurality of blasting holes on a upper free surface of a bench of rock with two free surface consisting of the upper free surface and a slant free surface extended from the upper free surface or on a free surface of rock with one free surface, in which the blasting holes are arranged in straight line and consist of a first group of first-order blasting holes, a second-order blasting hole and a second group of first-order blasting holes; charging the blast holes with an explosive; blasting the first-order blasting holes so as to form four free surfaces around the second-order blasting hole; and blasting the second-order blasting holes in a state where the four free surfaces were formed.

Abstract: A pyrotechnic device and method for making the same is disclosed which includes a pyrotechnic composition comprising a fuel, an oxidizing agent, and at least one of a metal salt and metal powder; wherein the pyrotechnic composition further comprises a cylinder with an internal surface area positioned within an outer cylindrical surface area; and, wherein prime is proximately disposed at least at one end of the internal surface area of said cylinder.

Abstract: A method of producing a liner for a shaped charge comprising mixing a composition of powdered metal with plasticizers and binders to form a paste. The paste is then particulated and injected into an injection mold. The paste is molded into a molded liner shape and then chemically treated to remove plasticizers and binders from the molded liner shape. After being removed from the injection mold the molded liner shape is sintered inside of a furnace. The powdered metal composition can be comprised of a mixture of from 60% to 97% by weight of powdered heavy metal and from 40% to 3% by weight of cobalt, or the powdered metal composition can be comprised of a mixture of from 60% to 97% by weight of powdered heavy metal and from 40% to 3% of copper, the preferred heavy metal being tungsten.

Abstract: A carrier for containing explosives (e.g., shaped charges) includes a housing having a plurality of recesses, each recess having a periphery and a side surface extending around the periphery. The side surface is shaped to a geometry to reduce or control reflection of compression waves generated in response to an explosive jet (e.g., a perforating jet) created due to detonation of an explosive. The side surface may be slanted from a bottom surface of the recess, or a predetermined profile may be formed in the side surface to scatter or direct compression waves. One or more shock absorbing inserts may also be placed in recesses formed by the inserts, or the recesses may be capped to trap air so that compression waves generated in the recesses are significantly reduced as compared to compression waves generated in well fluids.

Abstract: A method for setting and igniting a charge of explosives for geological investigations, comprising the following steps: a hole (14) is drilled in the ground (12) which is to be investigated; an explosion chamber (22) is hollowed out, whereby said explosion chamber has an expanded form in relation to the bore hole (14) at the end of said bore hole (14); an ignition element (34) and an explosive container (36) containing an explosive in a protective blister (54) surrounding the ignition element are lowered down into the explosion chamber (22); the explosive (42) is pressed out of the explosive container (36) into the explosive chamber (22) and the ignition element (34) is ignited In comparison with conventional methods, the inventive method provides for a considerably smaller diameter of bore hole, whereby said bore hole is substantially easier to drill.

Abstract: The invention relates to a gas generator comprising a generator housing which has a base part, and an electric igniter which has a rear side, is fastened in the base part and has connection lines on the rear side. The gas generator further comprises a propellant charge in the generator housing, the propellant charge being provided outside the igniter and an insulating bush surrounding the connection lines and fastened to the generator housing. The insulating bush consists of plastic and contains electrically conductive particles.

Abstract: An electronic module for a detonator, the module comprising an electronic circuit (4, 5, 6) encapsulated in a mass of hardened resin (7) in which there terminates at least one inlet conductor (8) and from which there extend two outlet conductors forming a detonator ignitor line (9), the mass of resin (7) being received in a tubular housing (1) which extends beyond the mass of resin (7) adjacent to the ignitor line (9) to define a cavity (11), the outlet conductors of length greater than the depth of the cavity forming an ignitor line (9) short circuited outside the mass of resin inside the cavity (11), which cavity is provided with a removable end cap (12).

Abstract: A method and associated decoy for offering a phantom target for protecting land, air or water vehicles or the like as a defense against missiles possessing a target seeking head operating in the infrared (IR) or radar (RF) range, or a target seeking head simultaneously or serially operating in both wavelength ranges. An effective mass emitting radiation in the IR range (IR effective mass) based on flares and a mass backscattering RF radiation (RF effective mass) based on dipoles are simultaneously made to take effect in an appropriate position as a phantom target. A ratio of dipole mass to flare mass of approx. 3.4:1 to approx. 6:1 is employed; and flares presenting a descent rate approx. 0.5 to 1.5 m/s higher than that of the dipoles are used.

Abstract: A shaped charge for generating a large hole in material such as well casing downhole in a wellbore. A shaped charge liner is oriented about a longitudinal axis, and a disk is positioned at the liner apex. When an explosive material is initiated the liner collapses into a perforating jet. The disk alters the jet formation process and changes the shape and location of a bulge within the perforating jet. Consequently, the shape of the perforating jet retains a larger diameter for generating a larger hole in the material to be perforated or for controlling the penetration depth. The disk surfaces can be flat, concave, convex or other shapes, and the disk composition can be varied to accomplish different design criteria.