Non-uniform resistance cathode beam mode fluorescent lamp

Details Non-uniform resistance cathode beam mode fluorescent lamp Non-uniform resistance cathode beam mode fluorescent lamp

1982-01-04

1983-11-01

Dixon, Harold

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313310, 313622, 315 67, 315334, H01J 162

Patent

active

044132042

ABSTRACT:
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 thermionic cathode for emitting electrons and an anode for accelerating the electrons and forming an electron beam, and a fill material, such as mercury, which emits ultraviolet radiation upon excitation. The cathode configuration provides for the elimination of "hot spots" due to ion bombardment at the low potential end of the cathode and for higher overall cathode emission of electrons. Various methods are employed to accomplish these ends, such as: segmenting the cathode, pitch variation of the cathode winding; ion probes and a non-uniform primary coil wound around a larger mandrel wire.

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