Electric flash device

Details Electric flash device Electric flash device

1978-09-22

1982-04-06

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

315225, H05B 4132

Patent

active

043238220

ABSTRACT:
This invention discloses an electric flash device which comprises a direct current power source circuit, a flash tube circuit including a flash tube, a voltage convertor including an oscillator circuit, an oscillating transformer and an oscillation starting circuit, a rectifier circuit for rectifying an altanating current voltage from the voltage convertor and a charging circuit including a main storage capacitor for storing an electric energy to be supplied to the flash tube, a triggering circuit for firing the flash tube, said oscillator circuit includes an oscillating switching element which has a high leak resistance, and said oscillation starting circuit includes a switch element for starting the actuation of said voltage convertor. In accordance with the electric flash device of the present invention, a power source switch is not required because said oscillation starting switch element is provided in the oscillation starting circuit and because said voltage convertor automatically stops activating in case of the flash operation is not performed for a predetermined time interval.

REFERENCES:
patent: 3310723 (1967-03-01), Schmidt et al.
patent: 3764849 (1973-10-01), Ohta
patent: 4065700 (1977-12-01), Liebman
patent: 4067028 (1978-01-01), Lermann et al.

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