Electric lamp and discharge devices: systems – Condenser in the supply circuit – Condenser in shunt to the load device and the supply
Patent
1975-05-29
1976-12-14
LaRoche, Eugene
Electric lamp and discharge devices: systems
Condenser in the supply circuit
Condenser in shunt to the load device and the supply
315188, 315360, 354128, H05B 4132
Patent
active
039978150
ABSTRACT:
A photographic lighting system, particularly for use in photographic studios, including a constant light for illuminating the subject to be photographed while the subject is being placed in proper position and while the photographer is focusing the camera, plus an electronic flash device for illuminating the subject while the actual photograph is being taken. The constant or continuous light is adjustable to vary the degree of illumination produced thereby, and the duration of the electronic flash is automatically adjusted to vary the duration of the flash, in response to the adjustment of the brilliance of the continuous light. The electronic flash tube is powered by a storage capacitor, and charge control means determines the voltage to which the storage capacitor is charged in preparation for an ensuing flash. Blocking means prevents the initiation of a flash unless the storage capacitor is charged to the proper voltage.
REFERENCES:
patent: 3682056 (1972-08-01), Tokutomi
patent: 3754162 (1973-08-01), Katayama
patent: 3780344 (1973-12-01), Paget
LaRoche Eugene
Rollei-Werke Franke & Heidecke
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