Abstract:
Apparatus and method for cooling a component inside a tool includes a container and a plurality of heat sinks positioned in the container. The components are positioned in the container with the heat sinks for maintaining a reduced temperature inside the container. Further, an insulating layer and a reflective layer surround the heat sinks and components to reduce heat transfer. Alternatively, the container can have a hollow wall that encloses the space in which a heat sink material (such as an eutectic material) is disposed. The components to be protected are located in the container. The eutectic material includes a composition having tin and zinc. The insulating layer includes a container that stores a vacuum layer, such as a dewar flask.
Abstract:
A structure for attenuating explosive shock waves to prevent propogation of accidental explosions by sympathetic detonation of adjacent explosives comprising bidirectionally symmetric layers of material of consecutively increasing or decreasing acoustic impedance laminated about a center layer. The structure may be made by combining several materials, as in consecutive layers of aluminum, plastic, and a rigid foam surrounding on both sides a layer of steel; or, two materials, as in a center layer of Kevlar.TM. surrounded on both faces with layers of plastic. The plies comprising the layer of Kevlar.TM. are canted with respect to the plastic layers.
Abstract:
A safe and arm device, which has an explosive train interrupted by a void establish a safe condition, has the void filled with a liquid explosive to establish an armed condition. The void may be in a device in which the liquid explosive is motivated by fluid pressure corresponding to free-fall or other velocities. The void may be a chamber portion filled with the liquid explosive by expansion of a bladder. Premature arming may be prevented by forming the explosive liquid from nonexplosive liquids mixed by rupture of a bladder or by melting a solid explosive.
Abstract:
The present invention relates to a system for forming an explosive and more particularly to a system that is portable, self-contained and is capable of mixing essentially non-explosive ingredients from separate containers or separate compartments within a container to form an explosive. The system is particularly adaptable for military or tactical applications.
Abstract:
A method of combining explosive compositions prepared from commercially available nitric acid and a common industrial solvent is disclosed herein which exhibits exceedingly high blasting strengths. The compositions are relatively more stable than conventional shaped charge explosives such as HMX or RDX and far less expensive. The compositions are transported separately to the blasting site where the compositions are combined in ambient temperature for immediate use.
Abstract:
An explosive adapted for field mix and comprising about ten parts by weight of a first ingredient in solid form which in ammonium nitrate or mixtures of ammonium nitrate with a minor or equal amount of other oxidizer salt such as ammonium perchlorate or the like and about 1 part by weight of a second ingredient in liquid form which comprises about equal parts of hydrazine and water by weight.
Abstract:
An intrinsically non-explosive liquid constituent of an explosive composition is contained within a can. The can is located inside of a plastic bottle. In the field an intrinsically non-explosive solid constituent of the explosive composition is poured from a separate container into a space in the bottle above the cam. The user presses down on the capped top of the bottle to move a downwardly projecting cutter carried by an upper portion of the bottle downwardly and through the top of the can. Following cutting the bottle is turned upside down and/or shaken to cause a mixing of the two constituents of the explosive composition. The resulting explosive is a liquid which can be poured from the bottle and then detonated by a conventional detonator, or detonated while still in the bottle.
Abstract:
A system for reducing the temperature-dependent influence of the powder on the muzzle velocity of ammunition units on discharging of the ammunition units from a barrel of a large-caliber gun with high muzzle velocities includes a plurality of part charges having predetermined types, powder varieties, charge sizes and geometric dimensions of the powder, controlling unit for determining desired muzzle velocities based on predetermined parameters including influence of a powder temperature in the part charges during discharging from the barrel so that the desired muzzle velocity of respective ammunition units and barrel pressures do not exceed a predetermined acceptable value while ensuring the highest possible performance of the gun and for determining a corresponding predetermined combination of part charges to achieve the desired muzzle velocity, and selecting and assembling devices responsive to the signal from the controlling unit for selecting predetermined combinations of part charges from a plurality of part charges, so that the respective part charges in each combination contribute to achieving the desired muzzle velocity determined by the controlling unit.