A means for and a method of initiating explosions

(19)

(11)

EP 0 054 402 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	03.08.1983 Bulletin 1983/31

(43)	Date of publication A2:
	23.06.1982 Bulletin 1982/25

(21)	Application number: 81305795

(22)	Date of filing: 08.12.1981

(84)	Designated Contracting States:
	AT DE FR GB SE

(30)

Priority:

11.12.1980 ZA 807774
22.06.1981 GB 8119236

(71)	Applicant: IMPERIAL CHEMICAL INDUSTRIES PLC
	()

(72)	Inventors:
	Geller, John Michael Ewen () Wilson, John Purdie () Plichta, Bohumil Maria Jan ()

(54)	A means for and a method of initiating explosions

(57) An alternating current generator for use as a shot exploder suitable for firing electric detonators coupled through toroid transformers e.g. 'Magnadet' detonators. The detonating system is energised by means of a signal that is automatically generated at the resonant frequency, thus avoiding the usual time-consuming and dangerous practice involving in-situ determination of inductance and selection of capacitors.

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