Combustion – Illuminating flash device – e.g. – photographic bulb – etc. – Fuel charge within sealed transparent casing – e.g. – bulb
Patent
1977-12-01
1980-01-08
Dority, Jr., Carroll B.
Combustion
Illuminating flash device, e.g., photographic bulb, etc.
Fuel charge within sealed transparent casing, e.g., bulb
252503, 252507, 252512, 252514, 252520, F21K 502
Patent
active
041826086
ABSTRACT:
A photoflash lamp unit is described having a plurality of flash lamps fired individually and in sequence to include a plurality of solid state switching devices each capable of being converted from a high electrical resistance to a low electrical resistance upon activation by either radiant energy or a high voltage pulse. The switch material composition comprises an admixture of a metallic silver source with a sufficient amount of a metal containing material to convert the switch to said low electrical resistance state by the high voltage pulse customarily employed to flash the individual lamps. In this manner, the switch device can be more reliably converted to the conductive state if not already completely converted by radiant energy supplied from an adjacent flash lamp and so provide a conductive path in the electrical circuit.
REFERENCES:
patent: 3532931 (1970-10-01), Cote et al.
patent: 3969065 (1976-07-01), Smialek
patent: 3988647 (1976-10-01), Bolon et al.
patent: 3990833 (1976-11-01), Holub et al.
patent: 3994664 (1976-11-01), Cusano
patent: 4080155 (1978-03-01), Sterling
Chevali Harihar D.
Evans Thomas A.
Dority Jr. Carroll B.
General Electric Company
Kempton Lawrence R.
McDevitt John F.
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