US3636401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid-cooled electrode for high-pressure compact arc
Assignee: Duro Test Corp
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Filing: 1969-12-22
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Granted: 1972-01-18
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Expires: 1989-12-22
Abstract
Abstract Anode and cathode electrodes for arc discharge lamps comprising an electrode holder, a tip and a joining piece of high-heat conductivity material which are cast to form a complete electrode without the need for brazing. The casting apparatus includes a mold for holding the electrode holder, tip and joining piece which permits movement of the electrode holder relative to the tip as the joining piece is heated.
Inventors
- 👤 Salvatore Cortorillo
- 👤 George A Shaffer
- 👤 Herbert S Strauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:58
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/98; H01J61/02; H01J61/04; H01J61/06; H01J61/073; H01J61/0732; H01J61/52; H01J61/523; H01J61/526
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
135 words
An electrode structure for an arc discharge lamp comprising a tubular holder of metal material, a rigid joining piece of a conductive material having a rigid, closed arc tip mounting surface on one end thereof, the other end of said joining piece formed with an opening to provide access into the interior of the joining piece, and an arc tip having a mounting surface, said mounting surface of said arc tip being fused to said mounting surface of said one end of said joining piece and said tubular holder being fused to said joining piece at a location to close off one end of sad tubular holder by said joining piece and to provide communication between the passage of the holder and the opening in said joining piece into the interior of the joining piece.
Claim 2
Dependent Claim
135 words
An electrode structure for an arc discharge lamp comprising a tubular holder of metal material, a rigid joining piece of a conductive material having a rigid, closed arc tip mounting surface on one end thereof, the other end of said joining piece formed with an opening to provide access into the interior of the joining piece, and an arc tip having a mounting surface, said mounting surface of said arc tip being fused to said mounting surface of said one end of said joining piece and said tubular holder being fused to said joining piece at a location to close off one end of sad tubular holder by said joining piece and to provide communication between the passage of the holder and the opening in said joining piece into the interior of the joining piece.
Claim 3
Dependent Claim
30 words
The electrode structure of claim 1 wherein said tip has a rear surface with a depression, the mounting surface of said joining piece having a shape conforming to said depression.
Claim 4
Dependent Claim
26 words
The electrode structure of claim 2 wherein the depression of said tip is generally concave and the mounting surface of the joining piece is generally convex.
Claim 5
Dependent Claim
38 words
The electrode structure of claim 1 wherein said tip comprises a central core piece and a concentric ring, the rear faces of said central core and said ring being fused to the mounting surface of said joining piece.
Claim 6
Dependent Claim
49 words
The electrode structure of claim 1 wherein said tip comprises a central core piece and a concentric ring, said ring being split into a number of sections, the rear faces of said central core piece and said ring sections being fused to the mounting surface of said joining piece.
Claim 7
Dependent Claim
27 words
The electrode structure of claim 1 wherein said tip comprises a plurality of rods whose rear ends are fused to said mounting surface of sad joining piece.
Claim 8
Dependent Claim
33 words
The electrode structure of claim 1 wherein said joining piece mounting surface has an arcuate outer surface, the rear face of said tip being fused to only a portion of said outer surface.
Claim 9
Dependent Claim
28 words
The electrode structure of claim 1 wherein said mounting surface of said joining piece and said tip have mating means for locating the tip on the mounting surface.
Claim 10
Dependent Claim
18 words
The electrode structure of claim 1 wherein said holder and said joining piece are of the same material.
Claim 11
Dependent Claim
29 words
The electrode structure of claim 1 wherein said joining piece is of a material having a lower melting point than the materials of said holder and said arc tip.
Claim 12
Dependent Claim
28 words
The electrode structure of claim 10 wherein said tip and said holder are fused directly to the joining piece with the joining piece serving as the fusing material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |