Ammunition and explosives – Igniting devices and systems – Accidental fuse ignition prevention means
Patent
1990-02-13
1991-08-06
Jordan, Charles T.
Ammunition and explosives
Igniting devices and systems
Accidental fuse ignition prevention means
1022023, F42B 318, F42B 3185
Patent
active
050367684
ABSTRACT:
An attenuator for dissipating electromagnetic energy and equalizing electrostatic energy is formed of a lossy ferrite material having an electrical resistance in a range of about 3,000 to 50,000 ohms. A conductor passes through the material and thence to a bridgewire to supply a firing charge to heat the bridgewire. In one embodiment of the invention, the attenuator is mounted within an electrically and thermally conductive housing, which will dissipate heat and equalize electromagnetic energy which may be induced in the conductor. A capacitive effect may be imparted by the orientation of the conductor as it passes through the ferrite. The capacitive effect is produced in winding the conductor parallel to the metal housing, and parallel to any other conductor passing through the ferrite. In the preferred form, the conductors are wound through the ferrite in a spiral pattern parallel to the conductor housing.
REFERENCES:
patent: 2818020 (1957-12-01), Burklund
patent: 4378738 (1983-04-01), Proctor et al.
patent: 4517895 (1985-05-01), Rucker
patent: 4592280 (1986-06-01), Shores
patent: 4848233 (1989-07-01), Dow et al.
Dow Robert L.
Proctor Paul W.
Gernstein Terry M.
Jordan Charles T.
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