Circular fluorescent lamp with oval section of tube

Details Circular fluorescent lamp with oval section of tube Circular fluorescent lamp with oval section of tube

1988-06-24

1990-10-02

Yusko, Donald J.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313611, 313612, 313634, 220 21R, H01J 6130, H01J 6302

Patent

active

049610244

ABSTRACT:
A circular fluorescent lamp has a fluorescent tube of a generally circular shape having electrodes fixed gastight in both of its ends respectively to enclose inert gas and mercury therein. A cap is mounted to bridge between the tube ends. The fluorescent tube has an oval section taken along a line perpendicular with respect to its axis. The rate of ovalness y/x, representing the ratio between the larger tube diameter y and the smaller tube diameter x of the tube sectional shape, preferably lies within the range of 1.10 to 1.30.

REFERENCES:
patent: 1794343 (1931-02-01), Smalley
patent: 2267118 (1941-12-01), Marder
patent: 3514276 (1970-05-01), Fujio et al.

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