US4591759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ingredients for solenoidal metal halide arc lamps
Assignee: General Electric Co
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Filing: 1984-09-10
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Granted: 1986-05-27
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Expires: 2004-09-10
Abstract
Abstract Halides of aluminum or tin, or other metals, in combination with sodium chloride in the presence of mercury and excess aluminum or tin metal are used as a fill material in a solenoidal metal halide arc lamp. This fill results in very good color and a high efficacy.
Inventors
- 👤 Carl L. Chalek
- 👤 Peter D. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:13
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/12; H01J61/14; H01J65/00; H01J65/04; H01J65/042; H01J65/048
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
123 words
A solenoidal metal halide arc lamp fill for supporting an arc discharge comprising: a metal halide comprised of the combination of a metal selected from the group consisting of aluminum, tin, mercury, copper, lead, zinc and antimony with a halogen selected from the group consisting of chlorine and bromine, said metal halide producing substantially continuous white light when in said arc discharge; sodium chloride for lowering the color temperature and increasing the efficacy of said arc discharge, the amount of said sodium chloride being sufficient to enhance sodium vaporization in said arc discharge by the formation of NaMCl x , where M is said metal and where x is 3 to 5; and mercury for controlling the arc voltage of said arc discharge.
Claim 2
Dependent Claim
123 words
A solenoidal metal halide arc lamp fill for supporting an arc discharge comprising: a metal halide comprised of the combination of a metal selected from the group consisting of aluminum, tin, mercury, copper, lead, zinc and antimony with a halogen selected from the group consisting of chlorine and bromine, said metal halide producing substantially continuous white light when in said arc discharge; sodium chloride for lowering the color temperature and increasing the efficacy of said arc discharge, the amount of said sodium chloride being sufficient to enhance sodium vaporization in said arc discharge by the formation of NaMCl x , where M is said metal and where x is 3 to 5; and mercury for controlling the arc voltage of said arc discharge.
Claim 3
Dependent Claim
19 words
The fill of claim 1 further comprising an excess metal selected from the group consisting of aluminum and tin.
Claim 4
Dependent Claim
10 words
The fill of claim 1 further comprising an inert gas.
Claim 5
Dependent Claim
14 words
The fill of claim 1 wherein said metal in said metal halide is aluminum.
Claim 6
Dependent Claim
14 words
The fill of claim 1 wherein said metal in said metal halide is tin.
Claim 7
Dependent Claim
120 words
A solenoidal metal halide arc lamp comprising: a light-transmissive arc envelope; a fill disposed in said arc envelope, said fill including a metal halide comprised of the combination of a metal selected from the group consisting of aluminum, tin, mercury, copper, lead, zinc and antimony with a halogen selected from the group consisting of chlorine and bromine, and said fill further including sodium chloride and mercury, the amount of said sodium chloride being sufficient to enhance sodium vaporization in a high intensity discharge by the formation of NaMCl x , where M is said metal and where x is 3 to 5; and means for coupling energy to said fill to produce said high intensity discharge in said arc envelope.
Claim 8
Dependent Claim
120 words
A solenoidal metal halide arc lamp comprising: a light-transmissive arc envelope; a fill disposed in said arc envelope, said fill including a metal halide comprised of the combination of a metal selected from the group consisting of aluminum, tin, mercury, copper, lead, zinc and antimony with a halogen selected from the group consisting of chlorine and bromine, and said fill further including sodium chloride and mercury, the amount of said sodium chloride being sufficient to enhance sodium vaporization in a high intensity discharge by the formation of NaMCl x , where M is said metal and where x is 3 to 5; and means for coupling energy to said fill to produce said high intensity discharge in said arc envelope.
Claim 9
Dependent Claim
22 words
The lamp of claim 6 wherein said fill further includes an excess metal selected from the group consisting of aluminum and tin.
Claim 10
Dependent Claim
13 words
The lamp of claim 6 wherein said fill further includes an inert gas.
Claim 11
Dependent Claim
14 words
The lamp of claim 6 wherein said metal in said metal halide is aluminum.
Claim 12
Dependent Claim
14 words
The lamp of claim 6 wherein said metal in said metal halide is tin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-26 | 1989-11-25 | 1990-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-26 | 1993-11-25 | 1994-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-26 | 1997-11-25 | 1998-05-27 | $7700.00 | Window Closed / Lapsed |