US3848150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge lamp with baffle plates
Assignee: Deutsche ITT Industries GmbH
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Filing: 1973-03-14
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Granted: 1974-11-12
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Expires: 1993-03-14
Abstract
Abstract A low pressure metal vapor discharge lamp, such as of mercury vapor, is provided with internal interdigitated apertured baffle plates. This lengthens the discharge path and reduces temperature to provide increased efficiency and improved operation at higher intensities. The baffles may be of insulation or conductor materials and may be coated with a protective layer, fluorescent material or ultra-violet reflective layer.
Inventors
- 👤 A Taxil
- 👤 R Boucher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:19
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/04; H01J61/10; H01J61/103
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
60 words
A metal-vapor discharge lamp comprising a longitudinal envelope having a metal-vapor therein, electrodes at opposite ends of said envelope, a longitudinal baffle plate dividing said envelope into upper and lower spaces connected through apertures in said plate, and a plurality of lateral baffle plates supported in said envelope between said electrodes forming a lengthened meandering discharge path through said vapor.
Claim 2
Dependent Claim
60 words
A metal-vapor discharge lamp comprising a longitudinal envelope having a metal-vapor therein, electrodes at opposite ends of said envelope, a longitudinal baffle plate dividing said envelope into upper and lower spaces connected through apertures in said plate, and a plurality of lateral baffle plates supported in said envelope between said electrodes forming a lengthened meandering discharge path through said vapor.
Claim 3
Dependent Claim
35 words
The metal vapor lamp of claim 1 wherein successive lateral baffle plates are secured alternately on opposite upper and lower sides of said longitudinal plate, respective apertures being positioned between pairs of adjacent alternate plates.
Claim 4
Dependent Claim
29 words
The metal-vapor lamp of claim 2 wherein said lateral baffle plates are at oblique angles with respect to the longitudinal axis of said lamp forming a sinusoidal discharge path.
Claim 5
Dependent Claim
16 words
The metal-vapor discharge lamp of claim 2, wherein said baffle plates are of an insulator material.
Claim 6
Dependent Claim
17 words
The metal-vapor discharge lamp of claim 2, wherein said baffle plates are of an electrical conductor material.
Claim 7
Dependent Claim
16 words
The metal-vapor discharge lamp of claim 2, wherein said baffle plates include a protective coating layer.
Claim 8
Dependent Claim
16 words
The metal-vapor discharge lamp of claim 2, wherein said baffle plates include an ultra-violet reflecting layer.
Claim 9
Dependent Claim
15 words
The metal-vapor discharge lamp of claim 2 wherein said baffle plates include a fluorescent layer.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |