Photographic flash device

Details Photographic flash device Photographic flash device

H - Electricity

05

B

315/15

H05B 41/32 (2006.01)

Patent

CA 1089526

PHOTOGRAPHIC FLASH DEVICE ABSTRACT A photographic flash device has a flash discharge tube, for example a xenon discharge tube, and a main capacitor which is connected across electrodes of the flash tube for storing electric charge. A triggering capacitor is connected in series with a primary coil of a triggering transformer and a synchronous switch, and a glow discharge lamp indicates completion of charging of the main capacitor. The invention provides a safety circuit for preventing accidental flashing, this safety circuit comprising a switching circuit that suspends operation of the triggering capacitor.

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