Combustion – Illuminating flash device – e.g. – photographic bulb – etc. – Fuel charge within sealed transparent casing – e.g. – bulb
Patent
1977-05-23
1979-01-09
Dority, Jr., Carroll B.
Combustion
Illuminating flash device, e.g., photographic bulb, etc.
Fuel charge within sealed transparent casing, e.g., bulb
362 4, 362 6, 362 13, F21K 502
Patent
active
041336313
ABSTRACT:
Fuse elements are used with a circuit board to provide more reliable sequential firing in a flash lamp array. The circuit board includes the lamp firing circuitry along with radiation switches connected in said circuitry and the fuse elements cooperate with said radiation switches in the circuit operation. Fuse elements are deposited on the circuit pattern adjacent to the flash lamps for actuation by radiation being emitted therefrom and the activated fuse elements interrupt the circuit path by thermal action. In a preferred embodiment, the circuit board is constructed from an organic polymer and the fuse elements are deposited at circuit locations wherein the underlying substrate has a thickness less than the substrate thickness elsewhere to produce holes in the circuit board by melting or thermal decomposition.
REFERENCES:
patent: 3532931 (1970-10-01), Cote et al.
patent: 3894226 (1975-07-01), Hanson
patent: 4017728 (1977-04-01), Audesse et al.
patent: 4049844 (1977-09-01), Bolon et al.
Collins Edward J.
Sterling Vaughn C.
Dority Jr. Carroll B.
General Electric Company
Kempton Lawrence R.
McDevitt John F.
Neuhauser Frank L.
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