G - Physics – 03 – B
Patent
G - Physics
03
B
240/77
G03B 15/03 (2006.01) G03B 15/04 (2006.01)
Patent
CA 1150211
D-22,201 - 18 - MULTILAMP PHOTOFLASH UNIT WITH PROTECTION AGAINST ELECTROSTATIC CHARGES ABSTRACT OF THE DISCLOSURE 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.
362219
Audesse Emery G.
Hartman Donald W.
Shaffer John W.
Gte Products Corporation
R. William Wray & Associates
LandOfFree
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