Selectively actuable electrical circuit

Details Selectively actuable electrical circuit Selectively actuable electrical circuit

1980-01-02

1981-12-08

Walsh, Donald P.

Ammunition and explosives

Igniting devices and systems

Electrical primer or ignitor

1022022, 361248, F42C 1100

Patent

active

043041841

ABSTRACT:
A control circuit for firing an electrically actuable igniter in response to a firing signal having predetermined characteristics. For protection from inadvertent or accidental actuation, the control circuit includes at least one inductor in series with the fuse wire of the igniter and at least one inductor in parallel with the source of the firing signal. The series and parallel inductors are electromagnetically coupled to one another through a ferrite bead and are electrically connected so as to generate opposed magnetic effects when current flows through them. Electric detonators incorporating the control circuit are also detailed.

REFERENCES:
patent: 3185093 (1965-05-01), Holinbeck
patent: 3425004 (1969-01-01), Warner
patent: 3425004 (1969-01-01), Warner
patent: 3762331 (1973-10-01), Vlahos

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