Photoflash unit having reflector with openings surrounded by transparent regions
AssigneeGTE Products Corporation
InventorsBoyd G. Brower, John W. Shaffer
Life of this patent
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Abstract
An improved photoflash unit comprising a circuit board with lamp-firing 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.
Claims10
In a photoflash unit comprising a circuit board having lamp-firing circuitry located on a surface thereof and including at least one switch for being activated upon receipt of radiant energy in the form of light and/or heat from a photoflash lamp, a plurality of electrically activated photoflash lamps electrically connected to said lamp-firing circuitry for being fired in a sequential manner, at least one of said photoflash lamps adapted for activating said switch upon firing of said lamp, and a reflector positioned between said photoflash lamps and said lamp-firing circuitry, the improvement wherein said reflector comprises at least one cavity portion for having said photoflash lamp adapted for activating said switch positioned therein, said cavity portion including an opening therein oriented between said activating photoflash lamp and said switch, said opening surrounded by a transparent, non-conductive region.
Dependencies are inferred from the claim text.