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US 4,902,933 AGranted
High efficacy discharge lamp having large anodes
AssigneeGeneral Electric Company
InventorVictor D. Roberts
Life of this patent
Estimating the term…
Abstract
An electric discharge lamp having two distinct electrode pairs, each pair including a "large" anode, is provided to eliminate the voltage drop between the positive column and the electrodes. A diode is wired in series with each electrode to prevent electron emission from the enlarged anodes. The combination results in a lamp with higher efficacy.
Claims14
An electric discharge lamp, comprising:
- a light-transmissive envelope containing a gaseous discharge medium;
- two spaced pairs of electrodes sealed within said envelope, each electrode pair comprising an enlarged anode in proximity with a cathode, the surface area of each said enlarged anode being sufficiently large to avoid any voltage drop between the positive discharge column and each said enlarged anode during lamp operation;
- and
- electronic means to prevent electron emission from the surface of each said enlarged anode.
1 more element
A fluorescent discharge lamp, comprising:
- a light-transmissive envelope containing a gaseous discharge medium, said light-transmissive envelope having a phosphor coating on the interior surface thereof;
- two spaced pairs of electrodes sealed within said envelope, each electrode pair comprising an enlarged anode in proximity with a cathode, the surface area of each said enlarged anode being sufficiently large to avoid any voltage drop between the positive discharge column and each said enlarged anode during lamp operation;
- and
- electronic means to prevent electron emission from the surface of each said enlarged anode.
1 more element
Dependencies are inferred from the claim text.