Nobel Kemi Ab

Bofors Defence Aktiebolag

Bofors Weapon Systems Ab

Bofors Explosives Ab

Anders Hafstrand

Larseric Larsson

Neile Nilsson

Jan-Olof Nyqvist

Per Sjoberg

Jorgen Sandstrom

The present invention relates to a method for avoiding uneven ignition when initiating artillery propellant powder charges ( ) which comprise a plurality of partial charges of the so-called modular type and which are initiated by means of laser initiation systems or conventional ignition cartridges. The invention also includes artillery propellant powder charge modules designed in accordance with this method. The invention is also based on the fact that each such charge module or modular charge has on the one hand been provided with an initiating charge ( ) at each end of the central ignition channel ( ), where this initiating charge can consist for example of black powder, and, on the other hand, the middle part of the same ignition channel has been provided with a specially designed firing unit ( ) consisting of a number of ring elements between which narrow ignition gaps ( ) are maintained.

Method for initiating artillery propellant powder charges, artillery propellant powder charge module and artillery propellant powder charge

The present invention relates to a propellant charge module for artillery guns, of the type which is usually referred to by the term &ldquo;modular charges&rdquo; (,). A special feature of this type is that, in an otherwise empty pyrophoric relay tube (,) arranged axially in the longitudinal direction of the charge, it has a firing charge which is made up of a plurality of successive powder rings (,), the different ring-shaped parts of this firing charge having distancing members (,) which are directed towards each other and give rise to narrow ignition gaps (,) between them.

Propellant charge module

An airbag device including a gas-emitting substance chamber having an opening. A gas-emitting substance is provided in the gas-emitting substance chamber including between about seventy-six to about eighty percent by weight of a high energy explosive and about twelve to about fifteen percent by weight of a combustible binder. An igniter provided within the gas-emitting substance chamber ignites the gas-emitting substance. A pressure reducing valve arranged in the opening of the gas-emitting substance chamber maintains a desired pressure in the gas-emitting substance chamber during burning of the gas-emitting substance. A gas container having an opening contains a gas for oxidizing gas produced by burning of the gas-emitting substance. A closure closes the opening in the gas container. A mixing chamber is joined to the gas-emitting substance chamber and the gas container in the vicinity of the opening of the gas-emitting substance chamber and in the vicinity of the opening of the gas container. The openings of the gas-emitting substance chamber and the gas container are directed toward an interior of the mixing chamber. The mixing chamber includes at least one outlet for directing gas resulting from the burning of the gas-emitting substance toward an airbag. An airbag is interconnected with the mixing chamber and is inflated by the gas resulting from the burning of the gas-emitting substance.

Airbag device and propellant for airbags

The disclosure relates to a method and a device for producing compositions comprising fine-grained crystalline explosive substances with the aid of a steam-driven ejector (22). The expression explosive substances is here taken to mean both low and high explosives.

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Karlskoga, Sweden

Anders Hafstrand