Photographic flash device

Details Photographic flash device Photographic flash device

1979-03-12

1981-03-31

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

315133, 315135, 354127, H05B 4132

Patent

active

042596157

ABSTRACT:
A photographic flash device comprising a main capacitor for flashing a flash discharge tube, a DC-DC converter, a constant-voltage circuit for controlling the oscillation function of the DC-DC converter and an indication means capable of discriminatively indicating states of the voltage of the main capacitor in three different voltage ranges, first range being from zero to a first predetermined voltage above which flashing is possible, second range being from a first predetermined voltage to a second predetermined voltage, the third range being from the second predetermined voltage to a third predetermined maximum voltage, respectively.

REFERENCES:
patent: 3714872 (1973-02-01), Mashimo et al.
patent: 3831079 (1974-08-01), Iwata
Electronic Indicator, Electronic Engineering, vol. 46, No. 55, Apr., 1974, p. 11.

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