Patent US3715254A successfully refreshed from Google Patents.
Patent US4525379A successfully refreshed from Google Patents.
US4525379A
Expired / Lapsed
US
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Method of manufacturing an electrode for a high-pressure gas discharge lamp and electrode for such a lamp
Assignee: US Philips Corp
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Filing: 1984-01-06
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Granted: 1985-06-25
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Expires: 2004-01-06
Abstract
Abstract A thickened part (1) of a high-melting metal, which may contain emitter material, is formed on a carrier (2) of a high-melting metal. In order to manufacture such electrode structures in mass production and to obtain both various material transitions and combinations and optimum designs, the thickened part (1) is formed by reactive deposition from the gaseous phase (CVD method), preferably by laser-supported deposition from the gaseous phase.
Inventors
- 👤 Horst Hubner
- 👤 Hans Lydtin
- 👤 Ludwig Rehder
- 👤 Thomas Zaengel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:22
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/022; H01J61/00; H01J61/02; H01J61/04; H01J61/06; H01J61/073; H01J61/0732
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
64 words
A method of manufacturing an electrode for a high-pressure gas discharge lamp, in which a thickened part of a high-melting metal is formed on a carrier of a high-melting metal characterized in that the carrier is coated by reactive deposition from the gaseous phase with a layer protecting against corrosion and then the thickened part is formed by reactive deposition from the gaseous phase.
Claim 2
Independent Claim
64 words
A method of manufacturing an electrode for a high-pressure gas discharge lamp, in which a thickened part of a high-melting metal is formed on a carrier of a high-melting metal characterized in that the carrier is coated by reactive deposition from the gaseous phase with a layer protecting against corrosion and then the thickened part is formed by reactive deposition from the gaseous phase.
Claim 3
Dependent Claim
29 words
The method of claim 1 wherein the carrier consists of a metal selected from the group consisting of niobium, molybdenum and tungsten and the thickened part consists of tungsten.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein the thickened part contains an emitter material.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein the layer protecting against corrosion is tantalum layer.
Claim 6
Dependent Claim
18 words
The method of claim 1 wherein the thickened part is doped by simultaneous deposition with an emitter material.
Claim 7
Dependent Claim
11 words
The method of claim 5 wherein the emitter material is thorium.
Claim 8
Dependent Claim
18 words
The method of claim 1 wherein the thickened part is formed by laser-supported deposition from the gaseous phase.
Claim 9
Dependent Claim
15 words
The method of claim 7 wherein the carrier is heated by a CO 2 laser.
Claim 10
Dependent Claim
14 words
The method of claim 7 wherein the carrier is heated by a Nd-YAG laser.
Claim 11
Dependent Claim
25 words
The method of claim 7 wherein the thickened part is obtained by lateral laser irradiation of discrete areas of an endless wire as a carrier.
Claim 12
Dependent Claim
25 words
The method of claim 7 characterized in that as carriers several pins are arranged in a turret drum and are heated successively by the laser.
Claim 13
Dependent Claim
27 words
The method of claim 7 characterized in that as carriers several pins and holders are successively passed into a reactor, flanged thereto, and removed from the reactor.
References Cited (Backward Citations)
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US3957474A
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DD135013A1
Cited
JPS55155457A
Cited
US4340617A
Cited
US4451503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |