High intensity metal arc discharge lamp
First Claim
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1. A metal halide arc discharge lamp comprising:
- an arc tube containing an ionizable discharge-sustaining fill including mercury and a metal halide;
a first and a second main electrode disposed within the arc tube;
a starter electrode disposed within the arc tube adjacent the first main electrode; and
an electrical circuit within said lamp, said circuit capable of increasing the peak starting voltage applied between said first main and starter electrodes above the peak voltage applied by an external power supply during normal operation of said lamp, said circuit including a diode and two resistors, the diode and one of said resistors being in series between said first main electrode and said starter electrode, and said two resistors being in series between said starter electrode and the external lead-in wire for said starting electrode.
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Abstract
A metal halide lamp, having two main electrodes and a starter electrode, has a resistor and a diode connected between the starter electrode and the adjacent main electrode. A second resistor is also in the circuit between the starter electrode and its connector to an external power supply. This circuit permits the lamp to be started on high pressure mercury vapor lamp ballasts.
18 Citations
2 Claims
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1. A metal halide arc discharge lamp comprising:
- an arc tube containing an ionizable discharge-sustaining fill including mercury and a metal halide;
a first and a second main electrode disposed within the arc tube;
a starter electrode disposed within the arc tube adjacent the first main electrode; and
an electrical circuit within said lamp, said circuit capable of increasing the peak starting voltage applied between said first main and starter electrodes above the peak voltage applied by an external power supply during normal operation of said lamp, said circuit including a diode and two resistors, the diode and one of said resistors being in series between said first main electrode and said starter electrode, and said two resistors being in series between said starter electrode and the external lead-in wire for said starting electrode.
- an arc tube containing an ionizable discharge-sustaining fill including mercury and a metal halide;
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2. An alternating current metal halide arc discharge lamp comprising:
- an arc tube containing an ionizable discharge-sustaining filling including mercury and a metal halide;
a sealed glass jacket enveloping the arc tube but spaced therefrom;
a first and a second main electrode disposed within the arc tube at opposite ends thereof;
a starter electrode disposed within the arc tube adjacent the first main electrode; and
a voltage-increasing circuit disposed within said jacket, said circuit comprising a diode and two resistors, the diode and one of said resistors being in series between said first main electrode and said starter electrode, and said two resistors being in series between said starter electrode and the external lead-in wire for said starting electrode.
- an arc tube containing an ionizable discharge-sustaining filling including mercury and a metal halide;
Specification
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Current AssigneePaul W. Ulcickas, Robert W. Freese, Ronald C. Lekebusch
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Original AssigneePaul W. Ulcickas, Robert W. Freese, Ronald C. Lekebusch
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InventorsFreese, Robert W., Lekebusch, Ronald C., Ulcickas, Paul W.
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Primary Examiner(s)Mullins, James B.
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Application NumberUS05/420,671Time in Patent Office627 DaysField of Search315/60,203,204,207,330 313/198,229US Class Current315/60CPC Class CodesH01J 61/545 using an auxiliary electrod...
