Bi-input safe detonator

Details Bi-input safe detonator Bi-input safe detonator

1986-01-02

1987-02-03

Lovering, Richard D.

Ammunition and explosives

Igniting devices and systems

Ignition or detonation circuit

F42C 1102

Patent

active

H00002100

ABSTRACT:
A detonator comprises a housing which contains a weak explosive charge igable by a bridge wire and a piezoelectric semiconductor buffer positioned in the housing for receiving a shockwave from the weak explosive charge when it is ignited. A high voltage lead is connected to the buffer for applying a high voltage signal to the buffer. If the high voltage signal is applied to the buffer at the same time that the weak explosive charge is ignited, the piezoelectric buffer will amplify a shockwave from the ignited charge to produce a detonation charge of sufficient amplitude to ignite a secondary or main charge which can form part of the detonator or be positioned against a surface of the detonator. In this way only the simultaneous ignition of the weak explosive charge and the activation of the piezoelectric buffer will cause ignition of the secondary or main charge. The weak charge itself is insufficient to ignite the secondary or main charge and application of a high voltage signal to the buffer alone produces an insufficiently high impulse for this purpose.

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