US3900761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High intensity metal arc discharge lamp
Assignee: GTE Sylvania Inc
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Filing: 1973-11-30
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Granted: 1975-08-19
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Expires: 1993-11-30
Abstract
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.
Inventors
- 👤 Robert W Freese
- 👤 Ronald C Lekebusch
- 👤 Paul W Ulcickas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:29
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/54; H01J61/545
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
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.
Claim 2
Dependent Claim
133 words
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.
Claim 3
Dependent Claim
118 words
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.
Claim 4
Dependent Claim
118 words
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.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |