pyrotechnic delay

pyrotechnic delay

A pyrotechnic device added to a firing system which transmits the ignition flame after a predetermined delay.
Dictionary of Military and Associated Terms. US Department of Defense 2005.
References in periodicals archive ?
The electronic detonator, instead of having a pyrotechnic delay (effectively a chemical burning reaction which has a certain time to burn), incorporates a chip inside the detonator.
Back in the mid-1970s, Orica (and indeed back through ICI and ICI affiliates which were the predecessors of the Orica group) began development of an electronic blasting system to try and improve on the accuracy being achieved at the time with pyrotechnic delays. While these were the standard industry method for timing delay detonators, they were, nonetheless, subject to anywhere from a 1% to 10% variation.
According to Mr Bullis, the accuracy of these units is better than [+ or -]0.1% of program delay -- comparable to 1 - 10% for standard pyrotechnic delays, or an order of magnitude improvement.
A pyrotechnic delay composition is an intimate mixture of solid, powdered fuels and oxidants capable of a highly exothermic oxidation-reduction reaction.