A gas generating type tool includes a propellant charge having an axially extending passage receiving therein an ignition tube containing a quantity of easily ignited, fast burning powder. The propellant and ignition tube are separately handled and/or transported until ready to run into the well. The...http://www.google.de/patents/US5005641?utm_source=gb-gplus-sharePatent US5005641 - Gas generator with improved ignition assembly
