Ammunition and explosives – Igniting devices and systems – Ignition or detonation circuit
Patent
1986-06-06
1987-12-15
Jordan, Charles T.
Ammunition and explosives
Igniting devices and systems
Ignition or detonation circuit
1022025, 102217, F42C 1100
Patent
active
047124776
ABSTRACT:
An electronic delay detonator for igniting an ignition resistor a predetermined delay time after supply of electric power from a blasting machine comprises two input terminals for receiving the electric power supplied from the blasting machine, a diode-bridge circuit connected to the input terminals, a power supply capacitor connected to the output of the diode bridge circuit, an RC charging circuit connected in parallel with the capacitor and having a predetermined time constant, and a monolithic IC. The monolithic IC includes a reference generation circuit for generating a compare reference voltage by dividing the power supply by dividing resistors, a voltage comparator for comparing the voltage charged in the capacitor of the charging circuit with the compare reference voltage, a signal latch circuit for holding the output of the comparator and a transistor current switching circuit responsive to the output of the signal latch circuit to for supplying the electric energy of the power supply capacitor to the ignition resistor of the detonator. The overall circuit is in a hybrid IC module. A resistor having a constant resistance sufficiently distinguishable from an internal resistance of the detonator is connected across the two input terminals to bypass a stray current and enable checking of connection continuity of series-connected detonators.
REFERENCES:
patent: 1959479 (1934-05-01), Kielczewski
patent: 4050382 (1977-09-01), Power
patent: 4145970 (1979-03-01), Hedberg et al.
patent: 4311096 (1982-01-01), Oswald
patent: 4328751 (1982-05-01), Oswald
patent: 4393779 (1983-07-01), Brede et al.
patent: 4395950 (1983-08-01), Oswald
patent: 4445435 (1984-05-01), Oswald
patent: 4487125 (1984-12-01), Zuk
patent: 4586437 (1986-05-01), Miki et al.
Aikou Kenichi
Goto Tsugio
Kurihara Yoichi
Asahi Kasei Kogyo Kabushiki Kaisha
Jordan Charles T.
LandOfFree
Electronic delay detonator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electronic delay detonator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic delay detonator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1213268