US3274428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Travelling wave tube with band pass slow wave structure whose frequency characteristic changes along its length
Assignee: Teledyne UK Ltd
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Filing: 1963-04-01
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Granted: 1966-09-20
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Expires: 1983-04-01
Abstract
No abstract record available.
Inventors
- 👤 Harris Neville Wreford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:15
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J25/00; H01J25/34; H01J25/36; H01J25/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A BACKWARD WAVE TRAVELLING WAVE TUBE HAVING AN ELECTRON GUN, A COLLECTOR ELECTRODE POSITIONED TO RECEIVE THE ELECTRONS OF AN ELECTRON BEAM PROJECTED FROM SAID GUN, AND INTERMEDIATE BETWEEN THE GUN AND THE COLLECTOR ELECTRODE, A SERIES OF PARTITION MEMBERS TRANSVERSE TO THE ELECTRON BEAM PATH AND EACH HVING A MAIN HOLE POSITIONED TO PASS SAID BEAM, ALL SAID MAIN HOLES BEING ALIGNED, AND A FURTHER APERTURE WHICH IS OFFSET WITH RESPECT TO THE MAIN HOLE, ALL SAID FURTHER APERTURES BEING ALIGNED WITH AN ALIGNMENT SUBSTANTIALLY PARALLEL TO THE MAIN HOLE ALIGNMENT, THE FURTHER APERTURES REDUCING IN SIZE FROM PARTITION MEMBER TO PARTITION MEMBER FROM A MAXIMUM SIZE IN A PARTITION MEMBER NEARER THE COLLECTOR ELECTRODE TO A MINIMUM SIZE IN A PARTITION MEMBER NEARER THE GUN.
Claim 2
Dependent Claim
127 words
A BACKWARD WAVE TRAVELLING WAVE TUBE HAVING AN ELECTRON GUN, A COLLECTOR ELECTRODE POSITIONED TO RECEIVE THE ELECTRONS OF AN ELECTRON BEAM PROJECTED FROM SAID GUN, AND INTERMEDIATE BETWEEN THE GUN AND THE COLLECTOR ELECTRODE, A SERIES OF PARTITION MEMBERS TRANSVERSE TO THE ELECTRON BEAM PATH AND EACH HVING A MAIN HOLE POSITIONED TO PASS SAID BEAM, ALL SAID MAIN HOLES BEING ALIGNED, AND A FURTHER APERTURE WHICH IS OFFSET WITH RESPECT TO THE MAIN HOLE, ALL SAID FURTHER APERTURES BEING ALIGNED WITH AN ALIGNMENT SUBSTANTIALLY PARALLEL TO THE MAIN HOLE ALIGNMENT, THE FURTHER APERTURES REDUCING IN SIZE FROM PARTITION MEMBER TO PARTITION MEMBER FROM A MAXIMUM SIZE IN A PARTITION MEMBER NEARER THE COLLECTOR ELECTRODE TO A MINIMUM SIZE IN A PARTITION MEMBER NEARER THE GUN.
References Cited (Backward Citations)
US2895071A
Cited
US3068425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |