Electrical pyrotechnic for actuating aircraft fire extinguisher has resistance operated igniter with filter to prevent parasitic current initiation of igniter

摘要

The electrical pyrotechnic for actuating an aircraft fire extinguisher has a charge (2) with an igniter (3,4) acting with the Joule effect on the charge using a current passing through a resistance. A control selectively supplies current to the resistance, with a filter in series with the resistance to prevent parasitic currents being produced in the igniter due to electromagnetic induction in the feed.