Long life incandescent lamp

Details Long life incandescent lamp Long life incandescent lamp

1986-07-23

1988-05-03

Moore, David K.

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Multiple filament load devices

315 66, 315 73, 315 64, 315112, 337 16, 337 85, 337 87, H01J 744

Patent

active

047422734

ABSTRACT:
An extended life incandescent lamp which employs thermal, voltage, or radiation activated differential switching to substitute a series-connected reserve filament for an inoperative primary filament without increasing the normal in-rush current.

REFERENCES:
patent: 4093894 (1978-06-01), Leighton
patent: 4382209 (1983-05-01), Loucaides
patent: 4447760 (1984-05-01), Koo
patent: 4580079 (1986-04-01), Koo

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