Shock-resistant delay detonator
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United States of America Patent
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Sep 29, 1987
Grant Date -
N/A
app pub date -
Feb 25, 1986
filing date -
Feb 25, 1986
priority date (Note) -
Expired
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Abstract
Delay detonators can be made to function reliably at reduced distances from a neighboring detonation by increasing the weight of the detonator's priming charge. Detonators containing about 0.26 g or more of lead azide perform reliably 12.7 cm from a detonation in a shock resistance pipe test, and this performance is reflected in high performance in trenching operations. The higher energy output of the heavier primer charge may compensate for a decrease in the base charge's sensitivity as the detonator shell is deformed or collapsed by shock.
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