Discharge lamp operating system

Details Discharge lamp operating system Discharge lamp operating system

1978-01-30

1980-12-09

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Surge generator or inductance in the supply circuit

315105, 315244, 315284, 315DIG2, H05B 4116

Patent

active

042387086

ABSTRACT:
A discharge lamp is ignited in every half cycle in its operating system including a discharge lamp operating circuit provided with a low frequency alternating current power source, a single winding type current limiter. The discharge lamp is connected to the power source through the current limiter and a series circuit including a high voltage output generator is connected in parallel to the discharge lamp. The high voltage output generator operates during the lamp operation for reigniting the discharge lamp. The voltage of the low frequency alternating current power source is set to less than the required reignition voltage of the discharge lamp during its operation, whereby the lamp current stabilizer size is minimized. Further, a filament preheating circuit is arranged to use current derived from the high voltage generator. The filament preheating circuit is combined with this operating circuit and so is a time delay for assuring a stable operation.

REFERENCES:
patent: 3466500 (1969-09-01), Peek
patent: 3665243 (1972-05-01), Kaneda et al.
patent: 3753037 (1973-08-01), Kaneda et al.
patent: 3997814 (1976-12-01), Toho
patent: 4023066 (1977-05-01), Smulders
patent: 4066932 (1978-01-01), Rottier
patent: 4079292 (1978-03-01), Kaneda

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