The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 08, 2004
Filed:
Aug. 19, 2002
Hans-Karl Haak, Unterlüss, DE;
Alexei Voronov, Grosskrotzenburg, DE;
Rheinmetall W & M GmbH, Unterlüss, DE;
Abstract
A cartridge with a propellant case ( ) that contains a propellant charge ( ) and an electrothermal ignition device, wherein several ignition channels ( ) are provided in the charge ( ), and extend axial-symmetrical in the direction of longitudinal axis ( ) of cartridge ( ), with each channel comprising a propellant tube ( ) and an electrically conducting layer ( ). To achieve a uniform and symmetrical ignition of the cartridge ( ) in the chamber of the respective weapon, electric arcs ( ) that form during the ignition operation in the ignition channels ( ), are decoupled in that the electrically conducting layer ( ) is composed of successively connected rhombi or other shapes (circles, ovals, etc.) that electrically function as decoupling resistances. When current flows through such a structure, the current bridges ( ) arranged in the current-flow direction between the individual rhombi ( ) etc. initially break apart explosively. Electric arcs ( ) then are formed at these locations and are decoupled by the decoupling resistances ( ). Continued current flow causes more and more of the decoupling elements ( ) to erode, so that the electric arcs ( ) become longer and longer.