Illumination – Photographic lighting – Plural light sources or light source supports
Patent
1978-12-22
1980-10-07
Lechert, Jr., Stephen J.
Illumination
Photographic lighting
Plural light sources or light source supports
362 10, 362240, 362241, G03B 1502
Patent
active
042272408
ABSTRACT:
A photoflash unit comprising a plurality of high voltage type flashlamps mounted on a printed circuit board containing circuitry for sequentially igniting the flashlamps. A plurality of electrically conductive reflectors respectively associated with the flashlamps are disposed between the lamps and the circuit board, with each reflector having an aperture in alignment with a corresponding aperture in the circuit board. Connected in series with each but the last lamp of the array is a radiant-energy-activated disconnect switch comprising a strip of electrically conductive heat-shrinkable polymeric material which is attached at both ends to the circuit board so that the midportion of the strip bridges a respective one of the apertures therein. A sheet of electrically insulating material is interposed between the reflectors and circuit board to prevent shorting therebetween. A plurality of deformations, such as dimples, are formed in the insulating sheet for spacing the sheet from the disconnect switch strips.
REFERENCES:
patent: 4152751 (1979-05-01), Sindlinger et al.
Armstrong Donald E.
Shaffer John W.
Coleman Edward J.
GTE Products Corporation
Lechert Jr. Stephen J.
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