Electrothermal ignition device and method for producing the device
AssigneeRheinmetall W & M GmbH
InventorsThomas Weise, Hans Karl Haak, Uwe Krone, Dirk Cegiel
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Abstract
The invention relates to an electrothermal ignition device for igniting a powder propellant charge (4), which comprises at least one electrically-conductive wire (11; 15; 19; 22), that extends, at least partially, through the propellant charge, and can be connected to a current source (3). The electrically-conductive wire (11; 15; 19; 22) is coated with a pyrotechnical ignition mixture (12; 16; 20)so that the ignition device can have a low electrical-energy requirement and be easily adapted to the different requirements placed on it. A mixture on a potassium perchlorate-zirconium (KClO4—Zr) base has proven to be an advantageous ignition mixture.
Claims6
A cartridge with an electrothermal ignition device, comprising:
- a cartridge including a cylindrical combustible sleeve that is at least partially filled with a propellant-charge powder, and a metallic base that is connected to one end of the sleeve and forms a bottom of the cartridge;
- a high-voltage electrode extending through the base and electrically insulated therefrom;
- at least one electrically-conductive wire, which extends axially through the first propellant-charge powder, connected between the high-voltage electrode and an annular contact disposed adjacent another end of the sleeve;
- and,
- a pyrotechnical ignition mixture coating the at least one electrically-conductive wire, at least in a partial region along its length.
Dependencies are inferred from the claim text.