Percussively ignited photoflash lamp and method of making same

Details Percussively ignited photoflash lamp and method of making same Percussively ignited photoflash lamp and method of making same

1978-04-04

1980-05-06

Dority, Jr., Carroll B.

Combustion

Illuminating flash device, e.g., photographic bulb, etc.

Fuel charge within sealed transparent casing, e.g., bulb

F21K 502

Patent

active

042015405

ABSTRACT:
A percussively-ignited photoflash lamp having an hermetically-sealed glass envelope containing no glass-to-metal seals therein. Ignition of the lamp is achieved by applying a percussive force (e.g. striking) to an external surface of the envelope which results in actuation of an ignition means disposed within the envelope. The ignition means, preferably a frictionally disposed, spring-loaded wire having a quantity of pressure sensitive primer thereon, ignites a quantity of shredded combustible material (e.g. zirconium) within the envelope to produce the desired flash. A method of making the lamp is also described.

REFERENCES:
patent: 2024225 (1935-12-01), Igari
patent: 3600120 (1971-08-01), Kopelman
patent: 3606607 (1971-09-01), Shaffer et al.
patent: 3700377 (1972-10-01), Brown
patent: 3706521 (1972-12-01), Kopelman et al.
patent: 3730669 (1973-05-01), Shaffer
patent: 3771941 (1973-11-01), Audesse et al.
patent: 3918883 (1975-11-01), Armstrong et al.

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