PYROTECHNIC TIME DELAY ELEMENT
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Accused Products
Abstract
A pyrotechnic time delay element which includes a casing made from a plastics material, a pyrotechnic composition inside the volume, a membrane inside the volume against one end of the pyrotechnic composition and a primary explosive inside the volume on an opposing side of the membrane.
15 Citations
20 Claims
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1-11. -11. (canceled)
- 12. A pyrotechnic time delay element which includes a casing which is injection-moulded from a non-metallic material, the casing comprising a housing inside which is formed a volume, at least one opening to the volume, a pyrotechnic composition which is loaded into the volume through the opening, and a membrane, inside the volume, which separates an ignition end of the casing from the composition, wherein the membrane has a perforation or opening with a shape, in cross-section, selected circular, square, rectangular, cross-shaped, star-shaped, polygonal, said membrane and cross sectional shape of perforation being used to shape a wave-front, propagated by the pyrotechnic composition, to ensure that optimum ignition of a primary explosive takes place after the time delay element has executed its timing interval.
Specification