Circuits for flash equipment

Details Circuits for flash equipment Circuits for flash equipment

1981-01-21

1982-02-23

Hartary, Joseph W.

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

354145, H05B 4126, G03B 1505

Patent

active

043170706

ABSTRACT:
A circuit for flash equipment having a trigger control switch or an SCR with its gate lead connected to a condenser through a switching transistor which is rendered conducting when the main flash capacitor is charged to the normal firing voltage and when the X sync contact is closed. After a time interval from the closure of the X sync contact, the condenser is short-circuited to prevent refiring of the flash tube. Such refiring would otherwise be caused when the condenser is recharged to actuate the SCR during the period of closure of the X sync contact.

REFERENCES:
patent: 3912968 (1975-10-01), Nakamura
patent: 4095141 (1978-06-01), Nakamura
patent: 4160933 (1973-07-01), Tanaka

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