Abstract: A filter device for filtering a gas flow, especially for filtering the gases produced by a gas generator for an impact protection cushion, comprises a filter element exhibiting several filter material plies of varying permeability lying in series in the flow direction. The filter element is fashioned as a wrapped member produced by winding up a length of filter material. The length of filter material has sectionally different filter materials, preferably wire mesh of differing mesh widths and metal fiber mats. A wrapped member is formed by winding up this filter material web, the wrapping plies of which consist of different materials with varying filter effects. This filter element wrap is inserted, for example, in the annular interspace between the two tubes of a double-tube gas generator. Owing to the rising pressure of the gas to be cleaned, the wrapped member is compacted with the consequence that its filtering function is improved.

Abstract: The gas generator has two tubes, coaxial to each other, with different diameters, between which there is formed an annular intermediate chamber. The inner tube is filled with gas-producing material in the form of pellets, which develops pressure gas when ignited, the gas emerges via openings in both tubes. Projecting into the inner tube there is an ignition device, which extends through the cylindrical walls of both tubes. The ignition device is held by a ring or tubular holding body, which is substantially shorter than both tubes and fills out the intermediate chamber between both tubes. Both tubes are provided with peripheral openings aligning with each other, and the holding body has an installation through-hole, into which the ignition device is positioned. The holding body has furthermore a slot. The ignition device is held in a reliable manner by means of the holding body.

Abstract: A cartridge is made up of a synthetic resin case member and a synthetic resin lid. The case member contains a first receiving chamber for receiving an igniter charge and a second receiving chamber for the accommodation of a propellant charge. A synthetic resin ignition pin flexibly connected to the lid extends into the first receiving chamber. Upon the exertion of pressure by a striker on the rear end of the ignition pin, the pin is advanced further into the first receiving chamber, a pointed forward percussion end of this ignition pin acting on the igniter charge to ignite the charge. The igniter charge is accommodated in funnel shape in a conical depression of the first receiving chamber. The percussion end of the ignition pin, extending into the igniter charge, upon displacement, causes friction in the igniter charge material and thus generates frictional heat therein.

Abstract: In a broad-area defense mine, the inclination under which an active member can rise or can be fired from an ambush position can be varied with the aid of at least one adjusting member between the positioning frame and a mounting or support for the active member which, in turn, are connected by way of a universal joint. In this arrangement, the mine, in the same way and with equal reliability as heretofore, combats a target within a specific area, but it is possible by means of this device to defend a substantially larger zone: the mine is transported, within the larger zone, to the "correct" site.

Abstract: An ignition unit is provided with an internal housing defining a chamber in which an ignition charge and an ignition element igniting the charge are accommodated. The housing defining the chamber consists of a cover and a container which are connected to one another along a circumferential groove. A distributor housing is mounted on to the housing forming the chamber, in which distributor housing gas outlet openings are provided which are closed by a cap-shaped cover of the chamber. The V-shaped circumferential groove represents a predetermined breaking or separation position of the chamber, for which reason the cover is separated from the container when the ignition charge is ignited. The cover moves away from the container into a space until it strikes the upper end of the distributor housing. With its movement relative to the distributor housing, the cover releases the gas outlet openings so that the gases and flames can emerge from the ignition unit.

Abstract: A gas generator is provided with an outer tube and an inner tube arranged coaxially within the outer tube. The pressure gas-generating charge is accommodated in the inner tube, the charge being ignited by an ignition unit. The generator is closed at the ends in a gas tight manner by closure covers, which are surrounded laterally by the end sections of the outer tube. On the inside of the closure covers there is in each case a recess for accepting the ends of the inner tube. The recesses hold the inner tube centered in the outer tube. Each cover is further provided with a peripheral groove, in which interior projections, directed inwards, and formed by multiple notching by means of a notching tool, engage. These projections, for their part, are arranged on the inner peripheral surface of the outer tube in the end sections thereof.

Abstract: The gas generator has a cylindrical housing, the front ends of which are closed by closure covers. A cylindrical outer section of the housing consists of high-grade steel; whereas the closure covers are made of aluminum, which has a thermal conductivity which is greater many times greater than that of the high-grade steel. In at least one of the closure covers, there is inserted a self-ignition device, which is provided with an ignitable material, that automatically ignites when reaching a minimum temperature. This minimum temperature clearly lies below the self-ignition temperature of the pressure gas-generating charge contained within the gas generator. The poor thermal conductivity in the cylindrical section of the housing prevents heat transport or transfer from outside via the housing to the pressure gas-generating charge; whereas the good thermal conductivity of the closure covers allows the quick heat transport to the self-ignition device.

Abstract: This invention deals with case-less ammunition, the propelling element of which has increased solidity. This increase in solidity is achieved by virtue of the fact that the propelling charge is firmly enveloped in a fabric. The fabric may consist of completely synthetic organic fibers or of mineral bibers. The ammunition in accordance with the invention manifests increased stability during loading and transportation in the weapon and better internal ballistics data than comparable ammunition known to date on the basis of the higher tamping attained.

Abstract: Combustible cartridge shells have cylindrical walls formed of combustible material. The walls comprise one or more wraps or windings of textile fibers, which are bound together with bonding agents having propellant charge characteristics. The bonding agents comprise either a mixture of polymers and explosives with decomposition temperatures above 180.degree. C. or a mixture of polymeric nitro-aromatic compounds which have two or more nitro groups per aromatic nucleus and also have a decomposition temperature above 180.degree. C. Mixtures of these two bonding agents may also be used to form the cylindrical wall of the combustible cartridge shell. The cartridge shells have inherently stable walls with a high mechanical resistance and are unaffected by changes in temperature up to 240.degree. C. Advantageously, these shells burn practically free of any residuals.

Abstract: A method for producing porous propellant charges from a mixture containing a propellant and a filler is described wherein a propellant having a decomposition temperature above 200.degree. C. is employed with a thermally removable filler to provide the charge forming mixture. The mixture is molded into a charge body and is subsequently heated to remove the filler at a temperature that is at least 50.degree. C. below the decomposition temperature of the propellant. Due to the heating at the elevated temperature the filler is wholly or in part removed to form a cavity within the charge body.

Abstract: A device for firing ammunition includes a combustion chamber accommodating several propellant charge members which latter contain a propellant charge and an ignition system for igniting the propellant charge. A fixedly disposed primary coil which receives an ignition signal is provided at the combustion chamber while a secondary coil is arranged in each propellant charge member, this secondary coil being connected to a resistor initiating the ignition system. The magnetic field, changing with time, which is produced by the primary coil penetrates the combustion chamber and induces a current in the secondary coils of each propellant charge member at the same time so that the ignition systems of all propellant charge members are simultaneously activated and ignite all propellant charges at once. On account of the simultaneous ignition of the propellant charge members, rapid firing sequences can be attained.

Abstract: A fuse having a protective jacket is utilized, for example, in petroleum exploration at large depths where the fuse must withstand high temperatures and pressures. The jacket is produced from a shrinkable hose that is shrink-fitted onto the unfinished cord which latter contains an explosive. The hose consists preferably of radiation-crosslinked polyethylene. The use of a shrink-fitted hose eliminates long preparation and curing times for the synthetic resin jacket. The process temperatures required during heat shrinking are no threat to the safety against ignition of the explosive. It is possible in accordance with the process to manufacture, in particular, fuses for high pressures and high ambient temperatures, without any problems.

Abstract: A device for igniting a propellant charge is provided with a housing defining a cavity wherein a piston is displaceably guided. The cavity is connected via a bore acting as a nozzle to a chamber wherein a case member of a cartridge is arranged for accommodating the propellant charge. A bottom wall of the case member is equipped with a bore aligned with the bore acting as a nozzle. A primer wafer is disposed on the inner surface of the bottom wall, this wafer being thinner in its central zone than in its marginal zone. The central zone of the primer wafer is a region under mechanical thermal stress during compression, the ignition energy being introduced to the primer wafer via this region in the form of hot compressed air from the compression chamber.

Abstract: In a mine capable of righting itself, laying devices for sensor lines are attached on the outside to the topside of a mine housing. During storage and during transport, the laying devices are, in their initial position, in close contact with the topside of the mine housing. Upon distribution of the mines over the terrain, the laying devices are spread away from the topside of the mine housing and transferred into their effective position so that the sensor lines can be ejected at an angle of about 45.degree. inclined with respect to the vertical.

Abstract: The present invention deals with the continuous production of sodium azide from sodium amide and nitrous oxide. This reaction takes place on a support material for sodium amide consisting of a mixture of sodium azide and sodium hydroxide. This mixture is passed through a reactor maintained at temperatures of between 200.degree. and 270.degree. C.; a portion of the reaction product and the support material are transferred out of the system at an end of the reactor, and a primary quantity of the reaction product and support material are returned to the reactor inlet where the material is combined with fresh, heated sodium amide in an amount corresponding to the quantity of sodium azide transferred-out with the reaction product and support material. With the aid of this continuous process, higher space-time yields of sodium azide can be obtained than in case of the conventional methods without increasing the danger of no longer controllable explosions.

Abstract: A parachute associated with an object unfolds faster in an airstream if the object is first accelerated in the direction of descent. This principle can be applied advantageously to a mine system combating military targets from the air because the time between starting from an ambush position in the terrain to the onset of searching movements in the air can be shortened.

Abstract: Fragments, also in the shape of projectiles with a length to diameter ratio greater than 3, can be successfully accelerated directly by means of an explosive if at least one forward casing in the frontal zone of the fragment causes the shock wave generated by detonation of the explosive to pass from the fragment into the forward casing, which subsequently detaches from the fragment thus protecting the fragment from the destructive effects of the reflected shock wave.

Abstract: A wool-wax substitute and a process for its formation are disclosed where the wool-wax substitute is the product of esterification of 1 mole of a glycerol-polyglycerol mixture with:(a) from 0.5 to 1.1 moles of a saturated aliphatic monocarboxylic acid having from 6 to 10 carbon atoms, or mixtures thereof;(b) from 0.5 to 1.1 moles of an unsubstituted straight chained saturated aliphatic monocarboxylic acid having from 16 to 22 carbon atoms, or mixtures thereof;(c) from 0.0 to 0.6 mole of an aliphatic saturated branched-chain monocarboxylic acid having from 16 to 18 carbon atoms;(d) from 0.0 to 0.5 mole of a saturated monocarboxylic acid having from 16 to 20 atoms and containing hydroxyl groups, or mixtures thereof, and(e) from 0.5 to 1.0 mole of saturated aliphatic dicarboxylic acids having from 4 to 10 carbon atoms, or mixtures thereof.The wool-wax has a hydroxyl number ranging from 20 to 100 and acid and iodine numbers under 5.

Abstract: In fuse elements of layered structure with long delay times, misfires, occur, above all, if aggravating secondary conditions prevail (such as, for example, high projectile rotation and/or temperature stresses and shock stresses). The safe progression of the reaction through the element is enhanced by providing that, as seen in the propagation direction of the reaction, the central zone of a charge igniting a delay charge projects into a central region of the delay charge. An additional improvement can be achieved by interposing between the ignition charge and the delay section, one or several relay charges and by making the choice of the charge components so that the discontinuities of the characteristic values (especially of the reaction rate) become more even and thus smaller, or by utilizing an ignition charge having a particularly low reaction rate.

Abstract: The reliability of a cartridge ejection device can be improved by the interposition of a readily deactivatable control flap, arranged on the outside of a monobloc unit, between a control bolt and a cartridge ejector of a break-open gun-housing of at least one barrel. The arrangement has the advantage wherein when no shot has been fired, the ejector will move into the extended position gradually during tilting of the barrel. When a shot has been fired, the ejector will remained tensioned until the barrel has been entirely tilted. Another advantageous feature is obtained by constructing the cartridge ejector of two parts coupled by way of a spring, namely a cartridge extractor and an extractor element, because thereby stress peaks can be further reduced and the cartridge extractor can already be entirely in the retracted position even before the barrel is completely closed.