Ammunition and explosives – Igniting devices and systems – Electrical primer or ignitor
Patent
1980-09-02
1982-06-22
Nelson, Peter A.
Ammunition and explosives
Igniting devices and systems
Electrical primer or ignitor
1022029, 10220212, F42C 1912
Patent
active
043356540
ABSTRACT:
The invention comprises an electric igniter comprising a filament (9), a priming charge ignitable by heat generated in the filament by feeding an electric current therethrough, two connection legs (8, 8') for connecting the feed wires (7, 7') to the igniter and the filament and a high frequency filter to protect the igniter against accidental ignition by electromagnetic fields or static electricity. The casing of the igniter comprises a wider part (2), the "cup", and a narrower part (3) in which narrower part (3) and the connection legs (8, 8') are cast in a material (10) which withstands pressure and high temperatures. The igniter has a simple mechanical design using capacitor and ferrite elements (11, 12) as the high frequency filter which elements are common for the two connection legs. The ferrite element (12) is located in the narrower part (3) of the igniter so that the element together with the material (10) serves as a bushing for the two connection legs.
REFERENCES:
patent: 2987951 (1961-06-01), Seavey et al.
patent: 3135200 (1964-06-01), Jackson
patent: 3175492 (1965-03-01), Reyne et al.
patent: 3185093 (1965-05-01), Holinbeck
patent: 3264989 (1966-08-01), Rucker
patent: 3298306 (1967-01-01), Purdy
patent: 4103619 (1978-08-01), Fletcher et al.
patent: 4271453 (1981-06-01), Yajima et al.
Aktiebolaget Bofors
Nelson Peter A.
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