Electronic flash device

Details Electronic flash device Electronic flash device

1986-03-17

1988-01-05

Boudreau, Leo H.

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

315200A, 315323, 315324, 315232, 354419, 354132, 3541451, H05B 4134

Patent

active

047178612

ABSTRACT:
An electronic flash device fires one or a pair of flash tube sequentially for continuous shooting photography with a motor driven photographic camera, for substantially continuous illumination or for sequential illuminations at intervals, as well as fire the flash tube a single time for one shot photography. The flash device is provided with a main capacitor and an auxiliary capacitor which selectively energize the flash tube or tubes. The auxiliary capacitor is charged by the main capacitor and discharged to energize the flash tube for a small amount of flash light and short-time restoration of the flash firing circuit. When a pair of flash tubes are employed, they are alternatively actuated for the sequential firing and one of them is actuated for the single time firing. The pair of flash tubes are coupled with each other through a commutation capacitor and switch elements for quick repetition of their firings.

REFERENCES:
patent: 3821750 (1974-06-01), Murakami et al.
patent: 3940659 (1976-02-01), Kojima et al.
patent: 3953763 (1976-04-01), Herrick
patent: 3978370 (1976-08-01), Stieringer
patent: 4143955 (1979-03-01), Matsumoto
patent: 4228381 (1980-10-01), Hasegawa
patent: 4246514 (1981-01-01), Metzger
patent: 4344020 (1982-08-01), Horinishi
patent: 4393335 (1983-07-01), Hirata et al.

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