Electronic flash device for camera

Details Electronic flash device for camera Electronic flash device for camera

1984-07-27

1987-06-09

Chatmon, Saxfield

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

3541451, 354147, 315 74, 315242, H05B 3700, H05B 3900, H05B 4114

Patent

active

046722734

ABSTRACT:
The enclosed electronic flash device for a camera includes a booster circuit connectible to an electrical power source or battery, a high voltage rectifier diode for rectifying the output of the booster circuit, and a storage capacitor. A main power supply switch and an auxiliary power supply switch are connected in series between the negative poles of the power source and capacitor. The auxiliary power supply switch is arranged to close when the flash device is attached to the camera. A signal terminal is connected to the negative pole of the storage capacitor through other circuit elements and another signal terminal is connected to one contact of the auxiliary power supply switch, which is connected in turn to the negative pole of the storage capacitor. The auxiliary power supply switch is connected in series with the main power supply switch at a point farther from the negative terminal of the battery than the main power supply switch.

REFERENCES:
patent: 4162836 (1979-07-01), Harrison
patent: 4196458 (1980-04-01), Kondo
patent: 4204140 (1980-05-01), Willis
patent: 4510419 (1985-04-01), Takematsu

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