Time delay lamp ballast circuit

Details Time delay lamp ballast circuit Time delay lamp ballast circuit

1981-10-22

1984-01-10

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

With cathode or cathode heater supply circuit

Delayed application of the discharge potential

315DIG5, 315 97, 315100, 315289, H05B 3904, H05B 4136

Patent

active

044255306

ABSTRACT:
A multiple fluorescent lamp ballast circuit of the rapid start type in which heating current is supplied to the lamp cathodes. A time delay switch is connected in series with a starting capacitor across one or more of the lamps, to delay lamp starting until the cathodes are sufficiently heated.

REFERENCES:
patent: 2497542 (1950-02-01), Frech
patent: 2722628 (1955-11-01), Cates et al.
patent: 2945986 (1960-07-01), Brooks et al.
patent: 2965799 (1960-12-01), Brooks et al.
patent: 3097325 (1963-07-01), Cosnuau
patent: 3599051 (1971-08-01), Lee
patent: 3866087 (1975-02-01), Powell et al.
patent: 3872350 (1975-03-01), Powell et al.

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