Imperial Chemical Industries Limited

Aeci Limited

Anthony J Rowe

Malcolm D Harding

Michael W Beck

In the field of blasting, an improvement in means for transmitting an initiating signal (non-electrically) to an explosive device to remotely detonate same in accordance with a predetermined delay period of the type which comprises tubing in which there is provided a reactive chemical composition containing at least one fuel component and at least one oxidant in intimate admixture that is capable of propagating a combustion signal from one end of said tubing to the other, the improvement consisting in the use of barium peroxide (BaO.sub.2) as the oxidant.

Low energy fuse

A detonating delay relay for shock or signal tube application so made as to be bidirectional. Comprising a delay detonator having a plug which holds two lengths of shock tube sealed at the ends. The detonation pulse is transmitted from one length of shock tube to the delay detonator. After a suitable delay, initiation of the other length of shock tube takes place.

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Edenvale, South Africa

Anthony J Rowe