Illumination – Photographic lighting – Safety or interlocks
Patent
1977-12-27
1979-03-20
Lechert, Jr., Stephen J.
Illumination
Photographic lighting
Safety or interlocks
362 13, 362247, G03B 1502
Patent
active
041457307
ABSTRACT:
A flash lamp array including a plurality of flash lamps and sequencing electrical circuitry for sequentially flashing the lamps. The array comprises a flash sensing indicator that is readily observable by an operator of the flash lamp array and includes a generally flat radiation sensitive means and having sections thereof aligned with the flash lamps. Each radiation-sensitive section is positioned to receive some of the radiant energy emitted by the flashing of one of the aligned lamps and is operable to constrict and change appearance upon being irradiated to provide an indicia of such flashing. The radiation-sensitive sections are each provided with a structurally weakened portion so that upon irradiation by the flashing of one of the aligned lamps, the irradiated one of the radiation-sensitive sections will readily separate at the structurally-weakened portion to readily constrict upon itself to positively provide a desired change in appearance of the irradiated section.
REFERENCES:
patent: 4017728 (1977-04-01), Audesse et al.
Lechert Jr. Stephen J.
Lombard R. S.
Westinghouse Electric Corp.
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