Photoflash lamp array having shielded switching circuit

Details Photoflash lamp array having shielded switching circuit Photoflash lamp array having shielded switching circuit

1975-12-08

1977-04-19

Braun, Fred L.

Buckles, buttons, clasps, etc.

174 685, 361400, G03B 1502, H05K 100

Patent

active

040190439

ABSTRACT:
A flash lamp array having a plurality of lamps positioned over a side of a circuit board having thereon circuitry for sequentially flashing the lamps. A metal shield, in the form of a sheet of metal foil or foil-covered paper, is positioned adjacent to the other side of the circuit board and is in contact with a common electrical run on the circuit board. Strips of radiation-sensitive plastic are positioned between the shield and the circuit board to function as electrical insulation, and also function as flash indicators by distorting due to radiation from an adjacent flashing lamp. Preferably, a conductive reflector member is positioned between the lamps and the circuit board and is connected to the common electrical circuit run.

REFERENCES:
patent: 2447168 (1948-08-01), Dean et al.
patent: 2502291 (1950-03-01), Taylor
patent: 3042740 (1962-07-01), Bosworth
patent: 3229623 (1966-01-01), Rubinstein et al.
patent: 3328514 (1967-06-01), Cogelia
patent: 3458270 (1969-07-01), Ganser et al.
patent: 3473880 (1969-10-01), Wick
patent: 3608451 (1971-09-01), Kelem
patent: 3619589 (1971-11-01), Hartman
patent: 3619590 (1971-11-01), Meulemans et al.
patent: 3710704 (1973-01-01), Wagner
patent: 3738791 (1973-06-01), Cressman
patent: 3941992 (1976-03-01), Blount et al.

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