AP8400006A0 - "Electrical sequential firing system" - Google Patents

"Electrical sequential firing system"

Info

Publication number
AP8400006A0
AP8400006A0 APAP/P/1984/000006A AP8400006A AP8400006A0 AP 8400006 A0 AP8400006 A0 AP 8400006A0 AP 8400006 A AP8400006 A AP 8400006A AP 8400006 A0 AP8400006 A0 AP 8400006A0
Authority
AP
ARIPO
Prior art keywords
module
terminal
detonating
power line
pulse
Prior art date
Application number
APAP/P/1984/000006A
Inventor
Immo Eurich Bock
Original Assignee
Johannesburg Construction Corporation Pty Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Johannesburg Construction Corporation Pty Limited filed Critical Johannesburg Construction Corporation Pty Limited
Priority claimed from ZA847422A external-priority patent/ZA847422B/xx
Publication of AP8400006A0 publication Critical patent/AP8400006A0/en

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Abstract

This invention relates to sequential blasting utilising electronic circuitry to steer detonating pulses to successive detonators. Modules are provided which contain a two-terminal element that has the characteristics that in its first normal state it has a high resistance in at least one direction and it may be changed into a second state in which it has a low resistance in both directions by a suitable pulse. Further, a detonating signal does not flow from one power line to the other through the particular module that is being addressed, but from one side of one module through a connecting link and then through the other module. Thus, each module has an input steering terminal and an output steering terminal,with the output steering terminal of each module connected to the input steering terminal of the next module. then, in use, current flows from one power line to a power terminal of one module, through its output steering terminal to the input terminal of the next module, through that module and to the other power line. Thus, with each detonating pulse, a detonator is fused and one of the elements passes into its second conducting state. As the detonator goes into a non-conducting configuration the next pulse is steered via the element that is now conducting to the next module.
APAP/P/1984/000006A 1984-10-05 1984-09-21 "Electrical sequential firing system" AP8400006A0 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA847422A ZA847422B (en) 1984-06-15 1984-10-05

Publications (1)

Publication Number Publication Date
AP8400006A0 true AP8400006A0 (en) 1984-11-01

Family

ID=25577527

Family Applications (1)

Application Number Title Priority Date Filing Date
APAP/P/1984/000006A AP8400006A0 (en) 1984-10-05 1984-09-21 "Electrical sequential firing system"

Country Status (1)

Country Link
AP (1) AP8400006A0 (en)

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