Electronic blasting system having a pre-fire countdown with multiple fire commands
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United States of America Patent
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May 15, 2012
Grant Date -
Dec 10, 2009
app pub date -
Aug 17, 2009
filing date -
Jul 15, 2003
priority date (Note) -
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Abstract
A system and method for conducting a firing sequence including a master device and a plurality of electronic pyrotechnic devices, wherein the master device broadcasts, multiple times, a fire command to the plurality of electronic pyrotechnic devices, the electronic pyrotechnic devices commence a pre-fire countdown in response to each fire command received without error, and each electronic pyrotechnic device conducts a pre-fire countdown to expiration and thereupon commences a final fire countdown that concludes with firing.
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