Single electrode beam mode fluorescent lamp for dc use

H - Electricity – 01 – J

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313/80

H01J 61/02 (2006.01) H01J 61/16 (2006.01) H01J 61/72 (2006.01) H01J 63/00 (2006.01)

Patent

CA 1190587

SINGLE CATHODE BEAM MODE FLUORESCENT LAMP FOR DC USE ABSTRACT OF THE DISCLOSURE The lamp shown herein is a beam mode fluorescent lamp for general lighting applications. The lamp comprises a light transmitting envelope, having a phosphor coating on its inner surface, enclosing a single electrode including a thermionic cathode for emitting electrons and an integral anode for accelerating the electrons and forming an electron beam, and a fill material, such as mercury, which emits ultraviolet radiation upon excitation. The electrode configuration provides for use of a single power source and minimal number of power leads. In addition, a separate cathode heater filament is not required.

417410

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