Electric lamp and discharge devices: systems – Plural diverse-type load devices
Patent
1993-04-16
1996-02-13
Mis, David
Electric lamp and discharge devices: systems
Plural diverse-type load devices
315 58, 315209R, 315DIG5, H05B 4129, H05B 4138, H05B 3902, H05B 3904
Patent
active
054913853
ABSTRACT:
A compact folded fluorescent lamp and a small incandescent lamp are both mounted on an ordinary Edison-type screw-base capable of being screwed into an ordinary lamp socket at which ordinary AC power line voltage is controllably provided. An inverter-type ballast is integrally combined with the base and is operable to power the fluorescent lamp whenever the base is indeed screwed into the lamp socket. The incandescent lamp is powered from the AC power line voltage by way of an SCR whose conduction angle is controlled such as to cause the total light provided from the combination fluorescent-incandescent lamp to remain substantially constant from the very first moment that AC power line voltage is provided at the lamp socket. Thus, when the AC power line voltage is initially provided, the light provided from the incandescent lamp will be at its maximum while the light provided from the fluorescent lamp will be at its minimum. Thereafter, the light from the incandescent lamp will gradually diminish as the light from the fluorescent lamp gradually increases. After a brief period, the AC power line voltage will be totally disconnected from the incandescent lamp.
REFERENCES:
patent: 2012239 (1935-08-01), Eknayan
patent: 4268780 (1981-05-01), Roche et al.
patent: 4297616 (1981-10-01), Corona
patent: 4350930 (1982-09-01), Peil et al.
patent: 4494041 (1985-01-01), Roche et al.
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