Power supply unit for electronic flash

Details Power supply unit for electronic flash Power supply unit for electronic flash

1983-09-23

1986-01-28

Perkey, William B.

3541731, G03B 118, G03B 1505

Patent

active

045667691

ABSTRACT:
A power supply unit for electronic flash includes a converter drive circuit which is activated when a main switch is turned on or in response to the completion of a shutter operation or the completion of a film winding operation, thereby driving a converter for oscillation. The converter charges a main discharge capacitor to a given voltage, and when the given voltage is reached, the converter drive circuit is deactivated, thereby automatically ceasing the oscillation of the converter.

REFERENCES:
patent: 3890538 (1975-06-01), Iwata et al.
patent: 4096492 (1978-06-01), Land et al.
patent: 4199242 (1980-04-01), Hosomizu et al.
patent: 4441774 (1984-04-01), Kazami et al.

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