Patent US4594471A successfully refreshed from Google Patents.
Patent US3582976A successfully refreshed from Google Patents.
US3582976A
Expired / Lapsed
US
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Electrode for magnetohydrodynamic generator
Assignee: Alcatel Lucent SAS
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Filing: 1969-10-30
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Granted: 1971-06-01
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Expires: 1989-10-30
Abstract
Abstract Electrode for an MHD generator, consisting of a metal element borne by a support in which it can move in the direction of its axis; the support and metal element surfaces exposed to hot gases flowing in the nozzle duct are electrically insulated by means of an insulating layer of cooling liquid vapor covering the surface of the lower part of the support.
Inventors
- 👤 Jean-Claude De Simone
- 👤 Michel Maucolot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:19
CPC Classifications
H; H02; H02K; H02K44/00; H02K44/08; H02K44/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
245 words
An electrode assembly for a magnetohydrodynamic generator having a nozzle duct in which not ionized gases circulate, comprising a metallic electrode having an elongated shape, a support for said metallic electrode, one portion of which constitutes a part of the inner wall of aid nozzle duct in contact with the hot ionized gases, said support having a cavity in which electrode is placed in a manner such that one extremity of said electrode is in contact with the hot ionized gases in said nozzle duct and said support being equipped with a cooling channel serving for the circulation of refrigerating liquid assuring the cooling of the metallic electrode and of said support, adjusting means for sliding said electrode within said cavity to reposition said electrode in proportion with the wear and tear of said extremity, electric insulation provided on the walls of said cavity in order to insulate said support from said electrode and insulating means providing electric insulation, particularly for avoiding the formation of electric arcs, between said extremity of said piece and said portion of said support which is in contact with said hot ionized gases, wherein said portion of the support in contact with said hot gases is made from porous material, a first surface of which constitutes a part of the inner walls of the nozzle duct and a second surface of which defines with the other portion of the support said cooling channel for the circulation of a refrigerating fluid.
Claim 2
Dependent Claim
245 words
An electrode assembly for a magnetohydrodynamic generator having a nozzle duct in which not ionized gases circulate, comprising a metallic electrode having an elongated shape, a support for said metallic electrode, one portion of which constitutes a part of the inner wall of aid nozzle duct in contact with the hot ionized gases, said support having a cavity in which electrode is placed in a manner such that one extremity of said electrode is in contact with the hot ionized gases in said nozzle duct and said support being equipped with a cooling channel serving for the circulation of refrigerating liquid assuring the cooling of the metallic electrode and of said support, adjusting means for sliding said electrode within said cavity to reposition said electrode in proportion with the wear and tear of said extremity, electric insulation provided on the walls of said cavity in order to insulate said support from said electrode and insulating means providing electric insulation, particularly for avoiding the formation of electric arcs, between said extremity of said piece and said portion of said support which is in contact with said hot ionized gases, wherein said portion of the support in contact with said hot gases is made from porous material, a first surface of which constitutes a part of the inner walls of the nozzle duct and a second surface of which defines with the other portion of the support said cooling channel for the circulation of a refrigerating fluid.
Claim 3
Dependent Claim
49 words
An electrode assembly according to claim 1, characterized in that said adjusting means providing for the sliding movement of said electrode comprises a screw assembly integral with said support having a translatable threaded rod for exerting a pressure on said electrode when said threaded rod is put in rotation.
Claim 4
Dependent Claim
63 words
An electrode assembly according to claim 1, wherein said insulating means assuring the electrical insulation between said extremity of said electrode and said portion of the support in contact with said hot ionized gases comprises a layer of insulating vapor of refrigerating liquid passing through said porous material and covering said portion of the support which is in contact with said hot gases.
Claim 5
Dependent Claim
91 words
An electrode assembly according to claim 1, wherein said support includes a half-circle groove therein in communication with said cavity in said portion constitution a part of the inner wall of said nozzle duct and opening toward said metallic electrode, a first conduit interconnecting said groove and said cooling channel for the circulation of refrigerating fluid formed in said support and a plurality of second conduits being preferably parallel to the axis of said metallic electrode placing said groove and the interior of said nozzle duct in communication with each other.
Claim 6
Dependent Claim
159 words
An electrode assembly for a magnetohydrodynamic generator having a nozzle duct in which hot ionized gases circulate, comprising an elongated metallic electrode, a support for positioning one extremity of said metallic electrode in contact with the hot ionized gases in said nozzle duct, one surface of said support surrounding said extremity forming a portion of the inner wall of said nozzle duct and said support including a cooling channel for the circulation of refrigerating liquid assuring the cooling of the metallic electrode and the support, and means forming part of said support for providing at least one passage for refrigerating liquid from said cooling channel to said one surface of said support, wherein said means providing a passage for refrigerating liquid to said one surface comprises a porous member having a first surface which constitutes a part of the inner wall of the nozzle duct and a second surface which defines at least a portion of said cooling channel.
Claim 7
Dependent Claim
159 words
An electrode assembly for a magnetohydrodynamic generator having a nozzle duct in which hot ionized gases circulate, comprising an elongated metallic electrode, a support for positioning one extremity of said metallic electrode in contact with the hot ionized gases in said nozzle duct, one surface of said support surrounding said extremity forming a portion of the inner wall of said nozzle duct and said support including a cooling channel for the circulation of refrigerating liquid assuring the cooling of the metallic electrode and the support, and means forming part of said support for providing at least one passage for refrigerating liquid from said cooling channel to said one surface of said support, wherein said means providing a passage for refrigerating liquid to said one surface comprises a porous member having a first surface which constitutes a part of the inner wall of the nozzle duct and a second surface which defines at least a portion of said cooling channel.
Claim 8
Dependent Claim
58 words
An electrode assembly according to claim 5, wherein said means providing a passage for refrigerating liquid to said one surface comprises a half-circle groove in said support in communication with said metallic electrode, a first conduit interconnecting said groove and said cooling channel, and a plurality of apertures connecting said groove to said one surface of said support.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |