Illumination – Elongated source light unit or support – With means to accommodate additional circuit element
Patent
1982-04-05
1984-05-22
Lechert, Jr., Stephen J.
Illumination
Elongated source light unit or support
With means to accommodate additional circuit element
339155L, 362228, 362230, 362254, F21S 300
Patent
active
044505108
ABSTRACT:
Ordinary incandescent lighting products, such as table lamps, floor lamps, ceiling fixtures, etc., are designed to be used with regular screw-in incandescent lamps, and can not be used with non-self-ballasted fluorescent lamps--even if these had been furnished with regular Edison screw-bases. The lighting products of the present invention, however, are capable of being used with either regular incandescent lamps or with screw-base-mounted non-self-ballasted fluorescent lamps.
In one preferred embodiment, the invention is implemented by using an Edison-type lamp socket with three lamp-contacting terminals--such as are commonly used with three-way incandescent lamps. The outer terminal (the one normally connecting with the threaded portion of a regular incandescent lamp) is connected directly with one side of the power line; the middle terminal (the one normally connecting with the middle terminal of a regular three-way incandescent lamp) is connected to the other side of the power line through a current-limiting inductor means; while the center terminal (the one connecting with the center terminal of a regular three-way incandescent lamp) is connected directly to the other side of the power line. Thus, with it mounted on a three-way screw-base with a non-connected center terminal, and having a starter included therewith, a fluorescent lamp can be safely and properly used in a three-way lamp socket--without a chance of being directly subjected to the full non-current-limited line voltage. Also, a regular incandescent lamp can be properly used in the same lamp socket--being thereby automatically connected to the center terminal.
In another preferred embodiment, a high-frequency inverter-type ballast is effectively substituted for the current-limiting inductor means.
REFERENCES:
patent: 3953761 (1976-04-01), Giudice
patent: 4318160 (1982-03-01), Dooley et al.
patent: 4363083 (1982-12-01), Tanaka et al.
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