Fluorescent lamp having meandering discharge path and...

Details Fluorescent lamp having meandering discharge path and... Fluorescent lamp having meandering discharge path and...

2007-05-29

2007-05-29

Patel, Ashok (Department: 2879)

Electric lamp or space discharge component or device manufacturi

Process

Combined, e.g., with shaping of lamp or device envelope

C445S026000

Reexamination Certificate

active

11203825

ABSTRACT:
An object of the present invention is to provide, without increasing the costs or decreasing the quantity of light, a fluorescent lamp that is less likely to have the bridge and the constituent tubes damaged while being handled and has improved handleability, as well as to provide a manufacturing method therefor. It is arranged so that the distance between the first and second constituent tubes gradually becomes smaller from the base side of the lamp toward the turning portion side of the lamp where the discharge paths turn. It is arranged so that the value of D2/D1is within a range of 0.05 to 0.70 inclusive, where D1is the distance between the first and second constituent tubes being measured at the bridge connecting points on the base side, and D2is the shortest distance between the first and second constituent tubes on the turning portion side.

REFERENCES:
patent: 5090931 (1992-02-01), Shiraishi
patent: 5896003 (1999-04-01), Gehring
patent: 6148638 (2000-11-01), Oga et al.
patent: 62090844 (1987-04-01), None
patent: 62278749 (1987-12-01), None
patent: 63128662 (1988-08-01), None

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