Discharge lamp ignition and supply circuit having a PTC resistor

Details Discharge lamp ignition and supply circuit having a PTC resistor Discharge lamp ignition and supply circuit having a PTC resistor

1985-03-15

1987-03-03

Jones, Larry

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Resistance in the condenser circuit

315241R, 315244, H05B 3700

Patent

active

046478205

ABSTRACT:
In a circuit for an inductively stabilized discharge tube (1) provided with two preheatable electrodes (2, 3) the ends of one electrode (2) are connected via a first capacitor (22) and a second capacitor (24), respectively, to the corresponding ends of the other electrode (3). The second capacitor (24) remote from the supply is shunted by a PTC resistor (23). The discharge tube (1) and inter alia the PTC resistor (23) form part of a lamp unit. The discharge tube (1) ignites readily even at low ambient temperatures. In the lamp operating condition, the influence of the PTC resistor (23) is neglible.

REFERENCES:
patent: 3801867 (1974-04-01), West et al.
patent: 4135115 (1979-01-01), Abernethy et al.
patent: 4181872 (1980-01-01), Chermin
patent: 4185233 (1980-01-01), Riesland et al.
patent: 4306177 (1981-12-01), Kaneda

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