Electric lamp and discharge devices: systems – With cathode or cathode heater supply circuit – Discharge device and/or rectifier in the cathode or heater...
Patent
1981-08-28
1984-04-10
Dixon, Harold
Electric lamp and discharge devices: systems
With cathode or cathode heater supply circuit
Discharge device and/or rectifier in the cathode or heater...
315207, 315241R, 315244, 315290, H05B 3900, H05B 3700
Patent
active
044423802
ABSTRACT:
The disclosed firing device comprises a fluorescent lamp serially connected to an inductive stabilizer, a first semiconductor switch including an SCR connected across the fluorescent lamp, and a nonlinear dielectric element serially connected to a parallel combination of a PNPN switch as a second semiconductor switch and a discharging circuit across the fluorescent lamp. The discharging circuit may comprise a resistor alone. The first semiconductor switch may include a semiconductor diode and a PNPN switch and the discharging circuit may include a resistor connected across series combination of a semiconductor diode. Alternatively, the discharging circuit may include a Zener diode and a resistor serially interconnected.
REFERENCES:
patent: 3878429 (1975-04-01), Iwata
patent: 4165475 (1979-08-01), Pegg et al.
patent: 4275335 (1981-06-01), Ishida
patent: 4347462 (1982-08-01), Adachi
patent: 4360762 (1982-11-01), Yamamoto
Dixon Harold
Mitsubishi Denki & Kabushiki Kaisha
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