Ammunition and explosives – Igniting devices and systems – Electrical primer or ignitor
Reexamination Certificate
2003-07-15
2004-09-14
Eldred, J. Woodrow (Department: 3644)
Ammunition and explosives
Igniting devices and systems
Electrical primer or ignitor
C102S206000, C102S215000, C102S217000, C102S218000, C102S248000, C361S248000, C361S249000, C361S251000
Reexamination Certificate
active
06789483
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention is directed generally to electronic blasting systems, and more particularly, to an electronic blasting system in which the electronic detonator enters either blaster mode or logger mode depending on the sensed operating voltage of the master device to which the detonator is attached.
Prior art electronic blasting systems have not included an electronic detonator that is capable of automatically distinguishing whether the detonator is connected to a blasting machine or a logger upon connection to the blasting machine or logger. Prior art electronic detonators have thus been unable to automatically determine for example, when attached to a logger, that they are attached to a logger rather than a blasting machine.
SUMMARY OF THE INVENTION
The present invention comprises an electronic blasting system in which the electronic detonator, when attached to a blasting machine or logger, automatically senses and determines whether it is attached to a blasting machine or a logger. Preferably, this is done by utilizing a different operating voltage for the blasting machine versus that of the logger, with the detonator being capable of ascertaining based upon this voltage the type of master device to which it is connected.
The present invention thus permits the application of automatic safety measures such as a logger mode in which the detonator automatically (either at all times during which it is not attached to a blasting machine or upon being attached to a logger) discharges its firing capacitor, disables its firing capacitor from charging, and/or disables any detonator firing switches.
REFERENCES:
patent: 5014622 (1991-05-01), Jullian
patent: 5520114 (1996-05-01), Guimard et al.
patent: 5894103 (1999-04-01), Shann
patent: 6000338 (1999-12-01), Shann
patent: 6173651 (2001-01-01), Pathe et al.
patent: 6618237 (2003-09-01), Eddy et al.
Jennings, III David T.
Kouznetsov Alex A.
Eldred J. Woodrow
Law Offices of Thomas J. Brindisi
Special Devices, Inc.
LandOfFree
Detonator utilizing selection of logger mode or blaster mode... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Detonator utilizing selection of logger mode or blaster mode..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detonator utilizing selection of logger mode or blaster mode... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3192220