US3787705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave-excited light emitting device
Assignee: General Electric Co
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Filing: 1972-04-28
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Granted: 1974-01-22
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Expires: 1992-04-28
Abstract
Abstract A microwave-excited light emitting device is provided comprising an electrodeless evacuated discharge lamp containing ionizable elements mounted in the frequency determining resonator of a microwave oscillator. The oscillator resonator is tuned to provide a microwave energy at a frequency sufficiently high to provide ionization and excitation of the elements within the electrodeless discharge lamp while mitigating deleterious ion bombardment of the walls of the electrodeless discharge lamp. By placing the lamp in the oscillator resonator any changes in the electrical characteristics of the lamp after firing will cause a frequency shift in the oscillator allowing the lamp and oscillator to remain in tuned relationship.
Inventors
- 👤 L Bolin
- 👤 S Jolly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:22
CPC Classifications
H; H01; H01J; H01J65/00; H01J65/04; H01J65/042; H01J65/046
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
169 words
A light-emitting device comprising: a. a microwave oscillator including: 1. a conductive shell; 2. an active means disposed within said shell for providing a sustained emission of microwave energy; 3. an elongated electrode disposed within said shell, said electrode having one end coupled to said active means, said electrode forming with said conductive shell A resonant cavity, said electrode dimensioned to be electrically at least one-half the operating frequency wave length of said cavity and adapted to create at least two positions of maximum electric field intensity, one of said positions being adjacent said one end of the electrode; and b. an electrodeless discharge lamp disposed within said shell and spaced from said active means a distance, electrically, of at least one-half the operating frequency wave length of said cavity so as to be disposed at another position of maximum electric field intensity in said cavity, said microwave oscillator being operable to transmit microwave energy to said lamp such that the gas therein provides a sustained emission of light.
Claim 2
Dependent Claim
169 words
A light-emitting device comprising: a. a microwave oscillator including: 1. a conductive shell; 2. an active means disposed within said shell for providing a sustained emission of microwave energy; 3. an elongated electrode disposed within said shell, said electrode having one end coupled to said active means, said electrode forming with said conductive shell A resonant cavity, said electrode dimensioned to be electrically at least one-half the operating frequency wave length of said cavity and adapted to create at least two positions of maximum electric field intensity, one of said positions being adjacent said one end of the electrode; and b. an electrodeless discharge lamp disposed within said shell and spaced from said active means a distance, electrically, of at least one-half the operating frequency wave length of said cavity so as to be disposed at another position of maximum electric field intensity in said cavity, said microwave oscillator being operable to transmit microwave energy to said lamp such that the gas therein provides a sustained emission of light.
Claim 3
Dependent Claim
15 words
an active means disposed within said shell for providing a sustained emission of microwave energy;
Claim 4
Dependent Claim
15 words
an active means disposed within said shell for providing a sustained emission of microwave energy;
Claim 5
Dependent Claim
54 words
The light-emitting device of claim 1 further comprising a dielectric member disposed in said shell and having an opening therethrough, the other end of said electrode being supported and substantially surrounded by said dielectric member, said other end having an opening supporting said lamp therein at said another position of maximum electric field intensity.
Claim 6
Dependent Claim
71 words
an active means disposed within said cavity at a location adjacent one of said positions for providing a sustained emission of microwave energy at a predetermined operating frequency; b. an electrodeless discharge lamp disposed within said cavity and spaced from said active means a distance at least one-half the operating frequency wave length of said cavity and thereby being disposed at another position of maximum electric field intensity in said cavity.
Claim 7
Dependent Claim
71 words
an active means disposed within said cavity at a location adjacent one of said positions for providing a sustained emission of microwave energy at a predetermined operating frequency; b. an electrodeless discharge lamp disposed within said cavity and spaced from said active means a distance at least one-half the operating frequency wave length of said cavity and thereby being disposed at another position of maximum electric field intensity in said cavity.
Claim 8
Dependent Claim
139 words
an elongated electrode disposed within said shell, said electrode having one end coupled to said active means, said electrode forming with said conductive shell A resonant cavity, said electrode dimensioned to be electrically at least one-half the operating frequency wave length of said cavity and adapted to create at least two positions of maximum electric field intensity, one of said positions being adjacent said one end of the electrode; and b. an electrodeless discharge lamp disposed within said shell and spaced from said active means a distance, electrically, of at least one-half the operating frequency wave length of said cavity so as to be disposed at another position of maximum electric field intensity in said cavity, said microwave oscillator being operable to transmit microwave energy to said lamp such that the gas therein provides a sustained emission of light.
Claim 9
Dependent Claim
139 words
an elongated electrode disposed within said shell, said electrode having one end coupled to said active means, said electrode forming with said conductive shell A resonant cavity, said electrode dimensioned to be electrically at least one-half the operating frequency wave length of said cavity and adapted to create at least two positions of maximum electric field intensity, one of said positions being adjacent said one end of the electrode; and b. an electrodeless discharge lamp disposed within said shell and spaced from said active means a distance, electrically, of at least one-half the operating frequency wave length of said cavity so as to be disposed at another position of maximum electric field intensity in said cavity, said microwave oscillator being operable to transmit microwave energy to said lamp such that the gas therein provides a sustained emission of light.
Claim 10
Dependent Claim
8 words
A light-emitting device comprising: a. microwave oscillator including:
Claim 11
Dependent Claim
8 words
A light-emitting device comprising: a. microwave oscillator including:
Claim 12
Dependent Claim
32 words
The device of claim 3 further comprising a dielectric member disposed in said shell, said member having an opening therein mounting said lamp at said another position of maximum electric field intensity.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |