Multilamp photoflash unit with protection against electrostatic charges
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United States of America Patent
Stats
-
Dec 1, 1981
Grant Date -
N/A
app pub date -
Oct 15, 1979
filing date -
Oct 15, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A photoflash unit comprising a linear array of flashlamps mounted on a printed circuit board disposed within the longitudinal channel of an elongated housing member having an enclosing cover panel of light-transmitting material. The lamp-firing circuitry includes a common circuit conductor run connected to one lead-in wire of each of the lamps. The housing member includes reflector cavities adjacent to the lamps, and a continuous coating of electrically conductive reflective material covers the surfaces of the channel and reflector cavities for providing both reflective surfaces for flashing lamps and, by virtue of a connection between the common run and conductive coating, a shield to reduce the likelihood of accidental flashing of lamps by electrostatic charges. Additional protection against electrostatic charges is provided by a plurality of tapered holes in the wall of the housing channel through which the continuous conductive coating extends to the exterior surface of the housing, thereby extending electrical ground to the exterior of the unit.
First Claim
Family
International Classification(s)
Cited Art Landscape
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