US4024431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resonance metal atom lamp
Assignee: ELSCINT IMAGING Inc
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Filing: 1975-06-23
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Granted: 1977-05-17
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Expires: 1995-06-23
Abstract
Abstract A controllable evaporation source of parent metal species, produced either from a volatile metal or a metal halide, and under some circumstances a chemical getter sink in a sealed RF excited discharge. This discharge occurs in a second, extremely pure gas which is present in great excess over the gas produced by evaporization which may be followed by chemical decomposition. Excitation of species whose emission is desired occurs by electron impact or energy transfer from the major species which are in turn, excited by the electron impact.
Inventors
- 👤 Robert A. Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:39
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/54; G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/3103; H; H01; H01J; H01J65/00; H01J65/04; H01J65/042; H01J65/046
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
142 words
A resonance lamp comprising a dielectric closed body having a predetermined vacuum therein; a reentrant coaxial hollow glass element integral within said body and extending from one end thereof substantially the length of said body; an electrical conductor within said element; an ultraviolet transparent window at the other end of said body; two hollow arms integral with and extending from said body; a high purity rare gas filling within said body at a pressure of 1 to 10 torr; a source of metal atoms in one of said arms; an electrically conductive sheathing adjacent said glass body; a getter in the other said arm for removing gases from said body; a means for heating the main body of said housing; and means for heating said one arm, with the temperature in said main body higher than the temperature in said one arm.
Claim 2
Dependent Claim
142 words
A resonance lamp comprising a dielectric closed body having a predetermined vacuum therein; a reentrant coaxial hollow glass element integral within said body and extending from one end thereof substantially the length of said body; an electrical conductor within said element; an ultraviolet transparent window at the other end of said body; two hollow arms integral with and extending from said body; a high purity rare gas filling within said body at a pressure of 1 to 10 torr; a source of metal atoms in one of said arms; an electrically conductive sheathing adjacent said glass body; a getter in the other said arm for removing gases from said body; a means for heating the main body of said housing; and means for heating said one arm, with the temperature in said main body higher than the temperature in said one arm.
Claim 3
Dependent Claim
18 words
The resonance lamp of claim 1 wherein said getter is in the form of a Ba containing compound.
Claim 4
Dependent Claim
17 words
The resonance lamp of claim 1 wherein said metal atoms are Cs produced by evaporation of Cs.
Claim 5
Dependent Claim
11 words
The resonance lamp of claim 1 wherein the getter is uranium.
Claim 6
Dependent Claim
30 words
The resonance lamp of claim 1 further comprising a source of RF power connected to said electrical conductor; and means for grounding said sheathing adjacent the exterior of said body.
Claim 7
Dependent Claim
127 words
A resonance lamp comprising a closed housing; a hollow reentrant element at one end of said housing and extending coaxially with said housing substantially the entire length thereof; an electrical conductor within said hollow reentrant element and extending outwardly thereof; an ultraviolet transparent window at the other end of said housing; an electrically conductive sheathing adjacent the exterior of said housing; a first hollow arm integral with and extending from said housing; a second hollow arm integral with and extending from said housing; a source of metal halide within said first arm; a getter in said second arm; an inert gas in said cylindrical housing; and a means for heating the main body of the closed housing to a temperature above the temperature of said first arm.
Claim 8
Dependent Claim
127 words
A resonance lamp comprising a closed housing; a hollow reentrant element at one end of said housing and extending coaxially with said housing substantially the entire length thereof; an electrical conductor within said hollow reentrant element and extending outwardly thereof; an ultraviolet transparent window at the other end of said housing; an electrically conductive sheathing adjacent the exterior of said housing; a first hollow arm integral with and extending from said housing; a second hollow arm integral with and extending from said housing; a source of metal halide within said first arm; a getter in said second arm; an inert gas in said cylindrical housing; and a means for heating the main body of the closed housing to a temperature above the temperature of said first arm.
Claim 9
Dependent Claim
12 words
The resonance lamp of claim 6 wherein said inert gas is helium.
Claim 10
Dependent Claim
20 words
The resonance lamp of claim 6 wherein said getter is replaced by a thermal decomposition source of Cl 2 .
Claim 11
Dependent Claim
20 words
The resonance lamp of claim 6 wherein said getter is replaced by a thermal decomposition source of I 2 .
Claim 12
Dependent Claim
12 words
The resonance lamp of claim 6 wherein said inert gas is Argon.
Claim 13
Dependent Claim
24 words
The resonance lamp of claim 8 wherein said thermal decomposition source produces Cl 2 ; and further comprising a means for heating said arms.
Claim 14
Dependent Claim
23 words
The resonance lamp of claim 9 wherein said thermal decomposition source produces I 2 ; and further comprising means for heating said arms.
Claim 15
Dependent Claim
25 words
The resonance lamp of claim 6 wherein said source of metal halide is a metal chloride and further comprising; means for heating said first arm.
Claim 16
Dependent Claim
24 words
The resonance lamp of claim 6 wherein said source of metal halide is a metal iodide and further comprising; means for heating said source.
Claim 17
Dependent Claim
17 words
The resonance lamp of claim 1 wherein said source of metal atoms is a pure volatile metal.
Claim 18
Dependent Claim
16 words
The resonance lamp of claim 1 wherein said source of metal atoms is a metal halide.
References Cited (Backward Citations)
US3898501A
Cited
US3851214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |