US3381171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable frequency magnetic field arc heater apparatus and variable frequency field producing means for use therein
Assignee: Westinghouse Electric Corp
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Filing: 1964-10-14
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Granted: 1968-04-30
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Expires: 1984-10-14
Abstract
No abstract record available.
Inventors
- 👤 Peter F Kienast
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:28
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/18; H05B7/185; H05B7/005; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; H05H1/36; H05H1/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN ARC HEATER APPARATUS, IN COMBINATION, A PAIR OF SPACED ELECTRODES, MEANS FOR ADMITTING GAS TO BE HEATED TO THE SPACE BETWEEN ELECTRODES, MEANS FOR EXHAUSTING HEATED GAS, MEANS FOR APPLYING AN ALTERNATING CURRENT POTENTIAL AS A FIRST FREQUENCY TO SAID ELECTRODES TO ESTABLISH AND MAINTAIN AN ARC THEREBETWEEN, FIELD COIL MEANS DISPOSED IN PREDETERMINED POSITION WITH RESPECT TO THE ELECTRODES, AND MEANS FOR APPLYING AN ALTERNATING CURRENT OF AN ADJUSTABLE SECOND FREQUENCY TO THE FIELD COIL MEANS TO SET UP AN ARC-ROTATING MAGNETIC FIELD WHICH VARIES PERIODICALLY IN DIRECTION, THE FREQUENCY OF THE CHANGE OF ROTATION DIRECTION OF THE ARC BEING SUBSTANTIALLY EQUAL TO THE DIFFERENCE BETWEEN THE FIRST FREQUENCY AND THE SECOND FREQUENCY, SAID SECOND FREQUENCY BEING ADJUSTED TO A VALUE WHICH PRODUCES A FREQUENCY OF THE CHANGE OF ROTATION WHEREBY MOST EFFICIENT STIRRING ACTION OF THE GAS IS PRODUCED
Claim 2
Dependent Claim
142 words
IN ARC HEATER APPARATUS, IN COMBINATION, A PAIR OF SPACED ELECTRODES, MEANS FOR ADMITTING GAS TO BE HEATED TO THE SPACE BETWEEN ELECTRODES, MEANS FOR EXHAUSTING HEATED GAS, MEANS FOR APPLYING AN ALTERNATING CURRENT POTENTIAL AS A FIRST FREQUENCY TO SAID ELECTRODES TO ESTABLISH AND MAINTAIN AN ARC THEREBETWEEN, FIELD COIL MEANS DISPOSED IN PREDETERMINED POSITION WITH RESPECT TO THE ELECTRODES, AND MEANS FOR APPLYING AN ALTERNATING CURRENT OF AN ADJUSTABLE SECOND FREQUENCY TO THE FIELD COIL MEANS TO SET UP AN ARC-ROTATING MAGNETIC FIELD WHICH VARIES PERIODICALLY IN DIRECTION, THE FREQUENCY OF THE CHANGE OF ROTATION DIRECTION OF THE ARC BEING SUBSTANTIALLY EQUAL TO THE DIFFERENCE BETWEEN THE FIRST FREQUENCY AND THE SECOND FREQUENCY, SAID SECOND FREQUENCY BEING ADJUSTED TO A VALUE WHICH PRODUCES A FREQUENCY OF THE CHANGE OF ROTATION WHEREBY MOST EFFICIENT STIRRING ACTION OF THE GAS IS PRODUCED
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) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |