Photoflash unit having reflector with openings surrounded by...

Details Photoflash unit having reflector with openings surrounded by... Photoflash unit having reflector with openings surrounded by...

H - Electricity

05

B

315/17

H05B 43/02 (2006.01) G03B 15/04 (2006.01) H05B 41/34 (2006.01) H05K 1/00 (2006.01) H05K 1/18 (2006.01)

Patent

CA 1155480

D-22,202 - 15 - TITLE: PHOTOFLASH UNIT HAVING REFLECTOR WITH OPENINGS SURROUNDED BY TRANSPARENT REGIONS ABSTRACT An improved photoflash unit comprising a circuit board with lamp-tiring circuitry thereon, a plurality (e.g., ten) of electrically activated photoflash lamps, and a reflector located between the lamps and circuitry. The lamp-firing circuitry includes at least one switch which is activated by radiant energy emitted from an adjacent photoflash lamp. The improvement comprises providing at least one longitudinal opening (slot) within a cavity portion of the reflector between the activating lamp and switch, and surrounding the opening with a transparent, non-conductive region to thereby assure consistent switch activation by substantially eliminating arcing between the reflector and circuitry.

368025

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