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 Lighting system

Details
Inventors: Hanlet, Jacques M.;
Assignee: Intent Patent, A.G. (London, GB2)
Primary Examiner: Nussbaum; Marvin L.
Assistant Examiner:
Attorney, Agent or Firm: Rosenberg; Morton J.

An improved lighting system (10) which in the preferred embodiment includes a cathode (12) having an external surface (34) being coated with a cathode outside film (40) for emitting electrons therefrom. A first anode (14) extends internal to the cathode (12) for heating the cathode (12) to thereby emit electrons from the external surface (34). A second anode (16) is positionally located external to the enclosed cathode (12) for accelerating the electrons emitted from the cathode external surface (34). A bulb member (18) encompasses the cathode (12), the first anode (14), and the second anode (16) in a hermetic type seal. The bulb member (18) has a predetermined gas composition contained therein with the gas composition atoms being ionized by the cathode emitted electrons. The gas composition ionized atoms radiate in the ultraviolet bandwidth of the electromagnetic spectrum. The bulb member (18) is coated with a fluorescent material (20) for intercepting the ultraviolet energy responsive to the ionization of the gas composition atoms. The fluorescent material (20) radiates in the visible bandwidth of the electromagnetic spectrum to give a visible light output.

DETAILED DESCRIPTION A lighting system which includes a cathode for emitting electrons from an external surface thereof.
A first anode extends internal to the cathode for heating the cathode thereby emitting electrons from an external surface.
A second anode is positionally located external to the cathode for accelerating electrons emitted from the cathode external surface.
A bulb member encompasses the cathode, as well as the first and second anodes in a substantially hermetic seal.
The bulb member includes a predetermined gas composition contained therein.
Gas composition atoms are ionized by the cathode emitted electrons and the gas composition ionized atoms radiate in the ultraviolet bandwidth of the electromagnetic spectrum.
The bulb member is further coated with a fluorescent material on an internal surface thereof for intercepting the ultraviolet energy responsive to the ionization of the gas composition atoms.


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