Photoflash lamp

Details Photoflash lamp Photoflash lamp

1977-12-30

1980-02-26

Myhre, Charles J.

Combustion

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

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

149 37, 102 28R, F21K 502

Patent

active

041904133

ABSTRACT:
A high-voltage type photoflash lamp having an ignition structure including an improved primer material with enhanced breakdown voltage characteristics 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 relatively coarse inert material which is nonconductive and insoluble in the vehicle used in the applied slurry. A preferred additive consists of glass microbeads having a particle size substantially larger than the zirconium powder used.

REFERENCES:
patent: 2995086 (1961-08-01), Scott
patent: 3041862 (1962-07-01), Anderson et al.
patent: 3048507 (1962-08-01), Zebree
patent: 3318243 (1967-05-01), Miller
patent: 4059388 (1977-11-01), Shaffer
patent: 4059389 (1977-11-01), Armstrong et al.
patent: 4061511 (1977-12-01), Baczok
patent: 4080155 (1978-03-01), Sterling

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