US4185228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeless light source with self-contained excitation source
Assignee: Osram Sylvania Inc
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Filing: 1978-10-19
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Granted: 1980-01-22
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Expires: 1998-10-19
Abstract
Abstract An electrodeless light source having a termination fixture adapted for connection to a high frequency power source has an electrodeless lamp with a self-contained ultraviolet excitation source and a means for coupling power to the electrodeless lamp. The electrodeless lamp includes a main lamp cavity and an exciter lamp cavity within a single envelope. When power is applied to the fixture, the exciter lamp cavity emits ultraviolet radiation which assists starting of the arc discharge in the main lamp cavity.
Inventors
- 👤 Robert J. Regan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:57
CPC Classifications
H; H01; H01J; H01J65/00; H01J65/04; H01J65/042; H01J65/044; H01J65/048
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
165 words
An electromagnetic discharge apparatus comprising an electrodeless lamp having an envelope made of a light transmitting substance, a main lamp cavity, and an exciter lamp cavity, said main lamp cavity enclosing a fill material which emits light upon breakdown and excitation and said exciter lamp cavity enclosing a material which emits ultraviolet radiation upon breakdown and excitation; a termination fixture having an inner conductor and an outer conductor disposed around the inner conductor, the conductors having a first end adapted for coupling to a high frequency power source and a second end coupled to said electrodeless lamp; and a power coupling means for electrically coupling high frequency power from said second end of said inner conductor to said main lamp cavity and said exciter lamp cavity, said high frequency power when coupled to said exciter lamp cavity being sufficient to cause an ultraviolet glow discharge therein, and said ultraviolet glow discharge and said high frequency power causing excitation of said main lamp cavity fill material.
Claim 2
Dependent Claim
165 words
An electromagnetic discharge apparatus comprising an electrodeless lamp having an envelope made of a light transmitting substance, a main lamp cavity, and an exciter lamp cavity, said main lamp cavity enclosing a fill material which emits light upon breakdown and excitation and said exciter lamp cavity enclosing a material which emits ultraviolet radiation upon breakdown and excitation; a termination fixture having an inner conductor and an outer conductor disposed around the inner conductor, the conductors having a first end adapted for coupling to a high frequency power source and a second end coupled to said electrodeless lamp; and a power coupling means for electrically coupling high frequency power from said second end of said inner conductor to said main lamp cavity and said exciter lamp cavity, said high frequency power when coupled to said exciter lamp cavity being sufficient to cause an ultraviolet glow discharge therein, and said ultraviolet glow discharge and said high frequency power causing excitation of said main lamp cavity fill material.
Claim 3
Dependent Claim
34 words
The electromagnetic discharge apparatus according to claim 1 wherein said power coupling means is a helical inductive coupling coil disposed around said electrodeless lamp and connected to the second end of said inner conductor.
Claim 4
Dependent Claim
34 words
The electromagnetic discharge apparatus according to claim 1 wherein said power coupling means is a spiral inductive coupling coil disposed around said electrodeless lamp and connected to the second end of said inner conductor.
Claim 5
Dependent Claim
24 words
The electromagnetic discharge apparatus according to claim 1 wherein said exciter lamp cavity of said electrodeless lamp contains a mixture of mercury and argon.
Claim 6
Dependent Claim
26 words
The electromagnetic discharge apparatus according to claim 1 wherein said electrodeless lamp includes a tubular stem for coupling to the second end of said inner conductor.
Claim 7
Dependent Claim
64 words
The electromagnetic discharge apparatus according to claim 5 wherein said power coupling means includes a tubular capacitive coupling sleeve disposed around said lamp stem for capacitive coupling of power from said inner conductor and an inductive coupling coil connected to said capacitive coupling sleeve and disposed around said electrodeless lamp for coupling of power to said main lamp cavity and said exciter lamp cavity.
Claim 8
Dependent Claim
16 words
The electromagnetic discharge apparatus according to claim 6 wherein said inductive coupling coil is a helix.
Claim 9
Dependent Claim
102 words
The electromagnetic discharge apparatus according to claim 5 wherein said power coupling means includes a tubular capacitive coupling sleeve disposed around said lamp stem for capacitive coupling of power from said inner conductor, an inductive coupling coil disposed around said exciter lamp cavity for coupling power to said exciter lamp cavity, and a power coupling cylinder disposed around the space between said exciter lamp cavity and said main lamp cavity such that power will be coupled to said main lamp cavity, said capacitive coupling sleeve and said power coupling cylinder being connected by said inductive coupling coil to form a single conductor.
Claim 10
Dependent Claim
26 words
The electromagnetic discharge apparatus according to claim 1 further including a source of power at high frequency coupled to the first end of said termination fixture.
Claim 11
Dependent Claim
34 words
The electromagnetic discharge apparatus according to claim 1 wherein the exciter lamp cavity of said electrodeless lamp is toroidal in shape and said power coupling means passes axially through said toroidal exciter lamp cavity.
Claim 12
Dependent Claim
148 words
An electromagnetic discharge apparatus comprising an electrodeless lamp having an envelope made of a light transmitting substance, a main lamp cavity, and an exciter lamp cavity, said main lamp cavity enclosing a fill material which emits light upon breakdown and excitation and said exciter lamp cavity enclosing a material which emits ultraviolet radiation upon breakdown and excitation; and a termination fixture having an inner conductor and an outer conductor disposed around the inner conductor, the conductors having a first end adapted for coupling to a high frequency power source and a second end adapted for coupling high frequency power to said main lamp cavity and said exciter lamp cavity, said high frequency power when coupled to said exciter lamp cavity being sufficient to cause an ultraviolet glow discharge therein, and said ultraviolet glow discharge and said high frequency power causing excitation of said main lamp cavity fill material.
Claim 13
Dependent Claim
148 words
An electromagnetic discharge apparatus comprising an electrodeless lamp having an envelope made of a light transmitting substance, a main lamp cavity, and an exciter lamp cavity, said main lamp cavity enclosing a fill material which emits light upon breakdown and excitation and said exciter lamp cavity enclosing a material which emits ultraviolet radiation upon breakdown and excitation; and a termination fixture having an inner conductor and an outer conductor disposed around the inner conductor, the conductors having a first end adapted for coupling to a high frequency power source and a second end adapted for coupling high frequency power to said main lamp cavity and said exciter lamp cavity, said high frequency power when coupled to said exciter lamp cavity being sufficient to cause an ultraviolet glow discharge therein, and said ultraviolet glow discharge and said high frequency power causing excitation of said main lamp cavity fill material.
Claim 14
Dependent Claim
38 words
The electromagnetic discharge apparatus according to claim 11 wherein said termination fixture includes a helical inductive coupling coil disposed around said electrodeless lamp for coupling high frequency power to said main lamp cavity and said exciter lamp cavity.
Claim 15
Dependent Claim
38 words
The electromagnetic discharge apparatus according to claim 11 wherein said termination fixture includes a spiral inductive coupling coil disposed around said electrodeless lamp for coupling high frequency power to said main lamp cavity and said exciter lamp cavity.
Claim 16
Dependent Claim
24 words
The electromagnetic discharge apparatus according to claim 11 wherein said exciter lamp cavity of said electrodeless lamp contains a mixture of mercury and argon.
Claim 17
Dependent Claim
37 words
The electromagnetic discharge apparatus according to claim 11 wherein the exciter lamp cavity of said electrodeless lamp is toroidal in shape and said second end of said inner conductor passes axially through said toroidal exciter lamp cavity.
Claim 18
Dependent Claim
26 words
The electromagnetic discharge apparatus according to claim 11 further including a source of power at high frequency coupled to the first end of said termination fixture.
References Cited (Backward Citations)
US3997816A
Cited
US4001631A
Cited
US3943404A
Cited
US3943403A
Cited
US3943401A
Cited
US3943402A
Cited
US3993927A
Cited
US4002944A
Cited
US3942058A
Cited
US3942068A
Cited
US4001632A
Cited
US4010400A
Cited
US3995195A
Cited
US4041352A
Cited
US4053814A
Cited
US4065701A
Cited
US4070603A
Cited
US4063132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-21 | 1983-07-23 | 1984-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-21 | 1987-07-23 | 1988-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-21 | 1991-07-23 | 1992-01-22 | $7700.00 | Window Closed / Lapsed |