Photoflash lamp

Details Photoflash lamp Photoflash lamp

1976-11-24

1983-01-18

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

043690289

ABSTRACT:
A high-voltage type photoflash lamp having an ignition structure including an improved primer material for the reliable ignition of filamentary combustible material distributed within the oxygen-filled envelope of the lamp. The primer material comprises a particulate fuel such as zirconium powder, a binding agent such as nitrocellulose, and an additive of finely divided inert material which is insoluble and nonconductive and has a particle size of less than about five microns diameter.

REFERENCES:
patent: 2651189 (1953-08-01), Beese
patent: 2783632 (1957-03-01), Eppig
patent: 3312085 (1967-04-01), Schilling et al.
patent: 3904451 (1975-09-01), Rainone
patent: 3914143 (1975-10-01), Sterling
patent: 3969067 (1976-07-01), Schupp
patent: 3972673 (1976-08-01), Schupp
patent: 4059389 (1977-11-01), Armstrong et al.

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