Patent US3278798A successfully refreshed from Google Patents.
US3278798A
Expired / Lapsed
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Magnetohydrodynamic generators
Assignee: Electricite de France SA
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Filing: 1964-03-25
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Granted: 1966-10-11
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Expires: 1984-03-25
Abstract
No abstract record available.
Inventors
- 👤 Fabre Jean
- 👤 Croitoru Zicu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:45
CPC Classifications
H; H02; H02K; H02K44/00; H02K44/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
252 words
IN A MAGNETOHYDYNAMIC GENERATOR; AN ELONGATED CONDUIT MADE OF AN ELECTRICALLY INSULATING MATERIAL AND ADAPTED TO BE TRANSVERSED BY A HOT GASEOUS STREAM CONTAINING CONSTITUENTS IONIZABLE IN POSITIVELY AND NEGATIVELY CHARGED FRAGMENTS; MEANS FOR PRODUCING INSIDE SAID CONDUIT A SUBSTANTIALLY UNIFORM MAGNETIC FIELD SUBSTANTIALLY PERPENDICULAR TO THE LONGITUDINAL DIRECTION OF SAID ELONGATED CONDUIT; A PLURALITY OF PAIRS OF SUBSTANTIALLY FLAT COLLECTING ELECTRODES SECURED AGAINST THE INSIDE WALL OF SAID CONDUIT, THE TWO COLLECTING ELECTRODES OF EACH PAIR BEING DISPOSED IN A CONFRONTING POSITION WITH THE FLAT SURFACES THEREOF SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL DIRECTION OF SAID ELONGATED CONDUIT AND TO SAID MAGNETIC FIELD, AND BEING CONNECTED, OUTSIDE SAID CONDUIT, THROUGH A UTILIZATION LOAD; A PLURALITY OF PAIRS OF SUBSTANTIALLY ELONGATED IONIZATION ELECTRODES CARRIED BY AND TRAVERSING THE WALL OF SAID CONDUIT, AND ELECTRICALLY INSULATED FROM SAID COLLECTING ELECTRODES, EACH OF SAID IONIZATION ELECTRODES HAVING A DISCHARGE END LOCATED INSIDE SAID CONDUIT AND A FEED END LOCATED OUTSIDE SAID CONDUIT, THE DISCHARGE ENDS OF THE TWO IONIZATION ELECTRODES OF EACH PAIR BEING DISPOSED IN A CONFRONTING POSITION, WITH THE DIRECTION OF THE STRAIGHT LINE CONNECTING SAID DISCHARGE ENDS OF TWO IONIZATION ELECTRODES BEING SUBSTANTIALLY PERPENDICULAR TO THE LONGITUDINAL DIRECTION OF SAID ELONGATED CONDUIT; AND MEANS FOR APPLYING IN OPERATION, BETWEEN THE FEED ENDS OF THE TWO IONIZATION ELECTRODES OF EACH PAIR VOLTAGE PULSES HAVING A SUFFICIENT AMPLITUDE TO PRODUCE ARCS BETWEEN THE DISCHARGE ENDS OF SAID TWO ELECTRODES THROUGH SAID GASEOUS STREAM FLOWING IN OPERATION THROUGH SAID CONDUIT IN THE LONGITUDINAL DIRECTION THEREOF.
Claim 2
Dependent Claim
252 words
IN A MAGNETOHYDYNAMIC GENERATOR; AN ELONGATED CONDUIT MADE OF AN ELECTRICALLY INSULATING MATERIAL AND ADAPTED TO BE TRANSVERSED BY A HOT GASEOUS STREAM CONTAINING CONSTITUENTS IONIZABLE IN POSITIVELY AND NEGATIVELY CHARGED FRAGMENTS; MEANS FOR PRODUCING INSIDE SAID CONDUIT A SUBSTANTIALLY UNIFORM MAGNETIC FIELD SUBSTANTIALLY PERPENDICULAR TO THE LONGITUDINAL DIRECTION OF SAID ELONGATED CONDUIT; A PLURALITY OF PAIRS OF SUBSTANTIALLY FLAT COLLECTING ELECTRODES SECURED AGAINST THE INSIDE WALL OF SAID CONDUIT, THE TWO COLLECTING ELECTRODES OF EACH PAIR BEING DISPOSED IN A CONFRONTING POSITION WITH THE FLAT SURFACES THEREOF SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL DIRECTION OF SAID ELONGATED CONDUIT AND TO SAID MAGNETIC FIELD, AND BEING CONNECTED, OUTSIDE SAID CONDUIT, THROUGH A UTILIZATION LOAD; A PLURALITY OF PAIRS OF SUBSTANTIALLY ELONGATED IONIZATION ELECTRODES CARRIED BY AND TRAVERSING THE WALL OF SAID CONDUIT, AND ELECTRICALLY INSULATED FROM SAID COLLECTING ELECTRODES, EACH OF SAID IONIZATION ELECTRODES HAVING A DISCHARGE END LOCATED INSIDE SAID CONDUIT AND A FEED END LOCATED OUTSIDE SAID CONDUIT, THE DISCHARGE ENDS OF THE TWO IONIZATION ELECTRODES OF EACH PAIR BEING DISPOSED IN A CONFRONTING POSITION, WITH THE DIRECTION OF THE STRAIGHT LINE CONNECTING SAID DISCHARGE ENDS OF TWO IONIZATION ELECTRODES BEING SUBSTANTIALLY PERPENDICULAR TO THE LONGITUDINAL DIRECTION OF SAID ELONGATED CONDUIT; AND MEANS FOR APPLYING IN OPERATION, BETWEEN THE FEED ENDS OF THE TWO IONIZATION ELECTRODES OF EACH PAIR VOLTAGE PULSES HAVING A SUFFICIENT AMPLITUDE TO PRODUCE ARCS BETWEEN THE DISCHARGE ENDS OF SAID TWO ELECTRODES THROUGH SAID GASEOUS STREAM FLOWING IN OPERATION THROUGH SAID CONDUIT IN THE LONGITUDINAL DIRECTION THEREOF.
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |