Easily-assembled compact self-ballasted fluorescent lamp

Details Easily-assembled compact self-ballasted fluorescent lamp Easily-assembled compact self-ballasted fluorescent lamp

2006-06-20

2006-06-20

Glick, Edward J. (Department: 2882)

Electric lamp and discharge devices

With gas or vapor

Envelope with particular structure

C313S493000, C362S216000

Reexamination Certificate

active

07064488

ABSTRACT:
A compact self-ballasted fluorescent lamp includes an arc tube formed by a glass tube double-spirally wound from its middle to both ends around a spiral axis, and a cylindrical holding member having a closed bottom and holding the arc tube, a case fit to cover a circumferential wall of the holding member, and the like. End-vicinity parts of the glass tube are formed to have a larger gap with glass tube parts adjacent in the direction of the spiral axis. The arc tube is held in a state where the distance L1 between a first point that is on an outer surface of a glass tube part adjacent to one of the ends of the glass tube in the direction of the spiral axis and a second point on a surface of the end wall facing the first point is about 1.5 mm.

REFERENCES:
patent: 6633128 (2003-10-01), Ilyes et al.
patent: 2002/0190625 (2002-12-01), Tokes et al.
patent: 2003/0234614 (2003-12-01), Itaya et al.
patent: 2004/0263079 (2004-12-01), Nakanishi et al.
patent: 4-277402 (1992-10-01), None
patent: 7-240176 (1995-09-01), None
patent: 10/275592 (1998-10-01), None

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