Switching devices for photoflash unit

Details Switching devices for photoflash unit Switching devices for photoflash unit

1979-05-21

1981-11-10

Scott, Samuel

Combustion

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

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

252514, 337416, 338 15, 362 13, F21K 502

Patent

active

042995582

ABSTRACT:
An improved solid state radiant energy switch device is described for operation with a plurality of flash lamps fired individually and in sequence and which is activated by radiant energy generated during flashing of the lamps to convert from a high electrical resistance ("off" condition) to a low electrical resistance or conductive state ("on" condition). Said switches are prepared from an improved material composition which undergoes chemical conversion comprising a carbon-containing silver salt admixed with a humidity-resistant organic polymer binder in ratios wherein said polymer binder does not exceed more than about three percent by weight in said admixture.

REFERENCES:
patent: 3297846 (1967-01-01), Peltier
patent: 3458270 (1969-07-01), Ganser et al.
patent: 3459488 (1969-08-01), Schroder et al.
patent: 3988647 (1976-10-01), Bolon et al.
patent: 3990832 (1976-11-01), Smialek et al.
patent: 3990833 (1976-11-01), Holub et al.
patent: 4080155 (1978-03-01), Sterling
patent: 4133631 (1979-01-01), Collins et al.
patent: 4182608 (1980-01-01), Chevali et al.

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