Trigger circuit for flash lamp directly coupled to AC source

Details Trigger circuit for flash lamp directly coupled to AC source Trigger circuit for flash lamp directly coupled to AC source

1977-03-07

1978-06-13

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Regulation of the control current and/or potential applied...

Discharge control discharge device in the control circuit

315194, 315208, 315261, 315335, 315DIG7, H05B 4116, H05B 4130

Patent

active

040951405

ABSTRACT:
A circuit arrangement for triggering an arc discharge flash lamp that is directly coupled through series circuitry across an alternating current (AC) source. The lamp is ignited by a high voltage pulse generated from a pulse transformer in response to discharge of a voltage doubler charging capacitor by a controlled switch trigger from an RC timing circuit at a predetermined phase of the alternating current power source. Circuit operation is initiated by a switching arrangement which is coupled to the timing circuit through a zero crossing detector and shunt switch for assuring that the timing circuit starts at a predetermined point on the alternating current waveform. In this manner, the lamp reliably flashes with the same intensity each time a flash is requested.

REFERENCES:
patent: 3116671 (1964-01-01), Schankler
patent: 3544840 (1970-12-01), Saiger
patent: 3745896 (1973-07-01), Sperti et al.
patent: 3962601 (1976-06-01), Wrzesinski
patent: 4041351 (1977-08-01), Whitehouse et al.

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