Electric lamp and discharge devices: systems – With cathode or cathode heater supply circuit – Automatic cut-out or voltage regulator in the cathode or...
Patent
1991-07-23
1992-12-29
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
With cathode or cathode heater supply circuit
Automatic cut-out or voltage regulator in the cathode or...
315307, 315DIG5, H05B 3904
Patent
active
051754711
ABSTRACT:
A circuit arrangement for the operation of a fluorescent lamp which is connectable to an alternating-current power supply, for example, the elctrical power supply on board an aircraft, including a switch which is located between the lamp electrodes, and which is actuatable through the intermediary of a control circuit whereby the lamp electrodes are heated when the switch is closed. A measuring element which is connected to the input of the control circuit determines the decreasing voltage at least at one of the lamp electrodes, and the control circuit will open the switch for the ignition of the fluorescent lamp only when the determined voltage is essentially constant, or has reached a threshold value.
REFERENCES:
patent: 4051407 (1977-09-01), Vanderwerf
patent: 4603281 (1986-07-01), Nilssen
patent: 4746841 (1988-05-01), Ogawa
patent: 4749909 (1988-06-01), Smulders
patent: 5027033 (1991-06-01), Zuchtriegel
patent: 5059870 (1991-10-01), Choon
Ludwig Jurgen
Stockinger Gottfried
Diehl GmbH & Co.
LaRoche Eugene R.
Zarabian A.
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