US3141992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Focusing system for omicron-type travelling wave tubes
Assignee: Thales SA
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Filing: 1961-10-09
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Granted: 1964-07-21
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Expires: 1981-10-09
Abstract
No abstract record available.
Inventors
- 👤 Delphin Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:52
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/08; H01J23/087; H01J23/0876
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
142 words
AN "O-TYPE" TRAVELLING WAVE TUBE INCLUDING A VACUUM-TIGHT, ELONGATED, CYLINDRICAL ENVELOPE, AN ELECTRON GUN LOCATED IN A FIRST, SHORTER PORTION OF SAID ENVELOPE, A DELAY LINE LOCATED IN A SECOND, LONGER PORTION OF SAID ENVELOPE, SAID TWO PORTIONS BEING SPACED APART BY A SHORT INTERVAL, TWO CYLINDRICAL PERMANENT MAGNETS DISPOSED WITH OPPOSITE POLARITIES AROUND SAID TWO PORTIONS OF THE TUBE ENVELOPE, RESPECTIVELY, THE RESPECTIVE MATERIALS OF SAID TWO MAGNETS BEING CHOSEN TO PRODUCE A MAGNETIC FIELD OF A HIGHER INTENSITY IN SAID FIRST PORTION THAN IN SAID SECOND PORTION, AN INTERMEDIATE POLE PIECE OF SOFT IRON INTERPOSED BETWEEN SAID TWO MAGNETS IN CONTACT WITH ONE EXTREMITY OF EACH OF SAID TWO MAGNETS, TWO TERMINAL POLE PIECES OF SOFT IRON IN CONTACT WITH THE OTHER EXTREMITIES OF SAID MAGNETS, RESPECTIVELY, AND A CYLINDRICAL FIELD STRAIGHTENER DISPOSED BETWEEN SAID ENVELOPE AND SAID TWO MAGNETS.
References Cited (Backward Citations)
US2608668A
Cited
US2947907A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |