Device for sequentially firing electrical detonators
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United States of America Patent
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-
May 21, 1996
Grant Date -
N/A
app pub date -
Mar 2, 1995
filing date -
Jul 31, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention concerns a device for the sequential firing of electrical detonators in several firing circuits, the device consisting of a detonating machine, electric leads and switches for activating the firing circuits. The detonating machine (1) is connected by a lead (2) to an electronic firing switch (3) to which are connected the firing circuits (13a . . . 13n) which consist of one or more series-connected electrical detonators (14a . . . 14n) and explosive charges (4a . . . 4n) designed to be detonated by the detonators, the electronic firing switch (3) consisting of a firing-current detection circuit (7), a logic circuit (8), switching relays (10a . . . 10n), a power supply (9) and protective resistors (11a . . . 11n).
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