Switching devices for photoflash unit

Details Switching devices for photoflash unit Switching devices for photoflash unit

1975-09-29

1976-11-09

Favors, Edward G.

Combustion

Projector and igniter for liquid or gelled fuel slug or rod,...

317 80, 338 15, F21K 502

Patent

active

039908321

ABSTRACT:
A multiple flashlamp array is designed having a plurality of lamps fired individually and in sequence and includes a plurality of static solid switching devices capable of being easily activated by radiant energy generated during flashing of the lamps. Initially, the switches have a high resistance ("off" condition) and after being activated by radiation, they undergo chemical conversion to a conductive state ("on" condition). The switches are prepared from compositions which impart improved shelf life under conditions of relatively high humidity at above normal ambient temperatures.

REFERENCES:
patent: 3451813 (1969-06-01), Kinney et al.
patent: 3458270 (1969-07-01), Ganser et al.
patent: 3459488 (1969-08-01), Schroder et al.
patent: 3532931 (1970-10-01), Cote et al.

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