US3343027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc plasma device having gas cooled electrodes containing low work function material
Assignee: Siemens Schuckertwerke AG
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Filing: 1964-08-05
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Granted: 1967-09-19
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Expires: 1984-08-05
Abstract
No abstract record available.
Inventors
- 👤 Frohlich Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:06
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; H05H1/40; H05H1/3431
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A PLASMA GUN, COMPRISING TWO COAXIAL ANNULAR ELECTRODES SPACED FROM EACH OTHER AND FORMING AN ANNULAR ARC GAP BETWEEN EACH OTHER, SAID ELECTRODES CONSISTING OF AN ELECTROCONDUCTIVE REFRACTORY MAIN MATERIAL HAVING A MELTING POINT ABOVE 1200*C., AND AT LEAST ONE OF SAID ELECTRODES CONTAINING AN ADDITION OF SUBSTANCE HAVING A WORK FUNCTION WITHIN 0.15 TO 0.7 THAT OF SAID MAIN MATERIAL, MAGNET MEANS HAVING TRANSVERSE FIELD IN SAID ANNULAR GAP FOR CAUSING THE ARC BETWEEN SAID ELECTRODES TO ROTATE ALONG SAID GAP, GAS DUCT MANS FOR PASSING THE GAS TO BE IONIZED THROUGH SAID GAP, SAID DUCT MEANS COMPRISING COOLING CHANNELS ALONG SAID ELECTRODES FOR MAINTAINING THEIR WORKING TEMPERATURE BY HEAT EXCHANGE WITH SUBSTANTIALLY ALL OF THE GAS FLOW AT A VALUE BELOW THE MELTING POINT OF THE ELECTRODES AND ABOVE 100*C.
Claim 2
Dependent Claim
132 words
A PLASMA GUN, COMPRISING TWO COAXIAL ANNULAR ELECTRODES SPACED FROM EACH OTHER AND FORMING AN ANNULAR ARC GAP BETWEEN EACH OTHER, SAID ELECTRODES CONSISTING OF AN ELECTROCONDUCTIVE REFRACTORY MAIN MATERIAL HAVING A MELTING POINT ABOVE 1200*C., AND AT LEAST ONE OF SAID ELECTRODES CONTAINING AN ADDITION OF SUBSTANCE HAVING A WORK FUNCTION WITHIN 0.15 TO 0.7 THAT OF SAID MAIN MATERIAL, MAGNET MEANS HAVING TRANSVERSE FIELD IN SAID ANNULAR GAP FOR CAUSING THE ARC BETWEEN SAID ELECTRODES TO ROTATE ALONG SAID GAP, GAS DUCT MANS FOR PASSING THE GAS TO BE IONIZED THROUGH SAID GAP, SAID DUCT MEANS COMPRISING COOLING CHANNELS ALONG SAID ELECTRODES FOR MAINTAINING THEIR WORKING TEMPERATURE BY HEAT EXCHANGE WITH SUBSTANTIALLY ALL OF THE GAS FLOW AT A VALUE BELOW THE MELTING POINT OF THE ELECTRODES AND ABOVE 100*C.
References Cited (Backward Citations)
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US3130292A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |