H - Electricity – 05 – B
Patent
H - Electricity
05
B
315/15
H05B 41/32 (2006.01)
Patent
CA 1174267
Abstract of the Disclosure This invention concerns an electric flash device which comprises a direct current power source circuit, a flash tube circuit including a flash tube, a voltage converter including an oscillator circuit, an oscillator transformer and an oscillation starting circuit, a rectifier circuit for rectifying an alternating current voltage from the voltage converter and a charging circuit including a main storage capacitor for storing electric energy to be supplied to the flash tube, and a triggering circuit for firing the flash tube. The oscillator circuit includes an oscillator switch- ing element which has a high leak resistance, and the oscillation starting circuit includes a switch element for starting the actuation of said voltage converter. In accordance with the electric flash device of the present invention, a power source switch is not required because the oscillation starting switch element is provided in the oscillation starting circuit and because the voltage con- verter automatically becomes deactivated if flash operation is not performed within a predetermined time interval.
319480
Fuji Koeki Corporation
Swabey Ogilvy Renault
Takematsu Yoshiyuki
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