Filament-type lamp primer and fabrication process

Combustion – Illuminating flash device – e.g. – photographic bulb – etc. – Fuel charge within sealed transparent casing – e.g. – bulb

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445 33, F21K 500

Patent

active

043819150

ABSTRACT:
A filamentary-type photoflash lamp suitable for use with a relatively low voltage high current power source includes a glass envelope with a shredded metal fill, a pair of leads interconnected by a filament wire and a primer having percussively-ignitable and powdered combustible incandescible material on the leads with the primer material responsive to heat generated by the filament wire. A process for fabricating the above-described photoflash lamp is also provided as well as a primer material composition.

REFERENCES:
patent: 3645663 (1972-02-01), Shaffer
patent: 4302182 (1981-11-01), Shaffer
patent: 4314394 (1982-02-01), Armstrong et al.
patent: 4315733 (1982-02-01), Bouchard et al.

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