Patent ID: 8245643
Filing Date: 2012-08-21
Classification: F42C

Abstract:
1. A delay unit for imposing a time delay period in a sequence of reactions, the delay unit comprising a substrate having a surface, at least one timing strip disposed on the surface and having a starting point and a discharge point spaced apart from each other, the distance along the timing strip between the starting point and the discharge point defining the effective length of the timing strip, the timing strip comprising an energetic material which upon ignition at the starting point results in an energy-releasing reaction which travels along the timing strip to the discharge point, the duration of such travel determining the time delay period, and the effective length of the timing strip and the burn rate of the energetic material determining the duration of such travel, the energetic material being comprised of at least one discrete layer of a fuel and at least one discrete layer of an oxidizer, the layer of the fuel and the layer of the oxidizer contacting each other.