Safety circuit for electronic flash apparatus

Details Safety circuit for electronic flash apparatus Safety circuit for electronic flash apparatus

1979-02-12

1980-05-20

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

315151, 315362, 328 7, 354145, H05B 4132

Patent

active

042041406

ABSTRACT:
An electronic flash unit has a safety circuit for removing stored electrical energy that is potentially hazardous to a flash unit user. A switch, responsive to opening of the flash unit housing, is closed to energize a quench circuit, which is parallel to a chargeable flash firing capacitor. The firing capacitor discharges through the quench circuit, thereby lowering the stored electrical energy to a level that is not hazardous to an operator.

REFERENCES:
patent: 2969721 (1961-01-01), Casselman et al.
patent: 3383994 (1968-05-01), Bihlmaier
patent: 3555394 (1971-01-01), Bramer et al.
patent: 3666964 (1972-05-01), Flynn
patent: 3705540 (1972-12-01), Reed et al.
patent: 3723810 (1973-03-01), Mashimo
patent: 3890538 (1975-06-01), Iwata et al.
patent: 3921034 (1975-11-01), Nakamura
patent: 3969737 (1976-07-01), Kendrick
patent: 4025817 (1977-05-01), Wollschleger
patent: 4095141 (1978-06-01), Nakamura

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