Patent US3305693A successfully refreshed from Google Patents.
US3305693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interdigital magnetron including means for suppressing undesired modes of operation by separating the frequency of possible undesired operating modes
Assignee: Northrop Grumman Systems Corp
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Filing: 1963-01-02
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Granted: 1967-02-21
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Expires: 1983-01-02
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Hull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:48
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/50; H01J25/52; H01J25/54; H01J25/56
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
AN INTERDIGITAL MAGNETRON COMPRISING: A CATHODE ASSEMBLY; AN ANODE ASSEMBLY INCLUDING AN INTERDIGITAL CAVITY ENCLOSING SAID CATHODE ASSEMBLY TO FORM AN INTERACTION SPACE BETWEEN THE TWO ASSEMBLIES, SAID CAVITY BEING CAPABLE OF OSCILLATION IN DIFFERENT MODES, WHEREIN THE HIGH FREQUENCY MAGNETIC FIELD LINES ARE ARRANGED IN GROUPINGS WITH A MAXIMUM MAGNETIC FIELD IN PREDETERMINED RADIAL ZONES SEPARATING THE GROUPS; MEANS FOR APPLYING A STEADY MAGNETIC FIELD TO SAID INTERACTION SPACE SUBSTANTIALLY PARALLEL TO SAID CATHODE; BAFFLE ELEMENTS OF CONDUCTIVE MATERIAL DISPOSED WITHIN THE INTERDIGITAL CAVITY ALONG THE RADIAL ZONES AS SEPARATIONS BETWEEN THE GROUPINGS OF HIGH FREQUENCY MAGNETIC FIELD LINES PECULIAR TO A DESIRED MODE OF OPERATION; AND MEANS FOR MAINTAINING SAID BAFFLES AT A FIXED PREDETERMINED POTENTIAL.
Claim 2
Dependent Claim
118 words
AN INTERDIGITAL MAGNETRON COMPRISING: A CATHODE ASSEMBLY; AN ANODE ASSEMBLY INCLUDING AN INTERDIGITAL CAVITY ENCLOSING SAID CATHODE ASSEMBLY TO FORM AN INTERACTION SPACE BETWEEN THE TWO ASSEMBLIES, SAID CAVITY BEING CAPABLE OF OSCILLATION IN DIFFERENT MODES, WHEREIN THE HIGH FREQUENCY MAGNETIC FIELD LINES ARE ARRANGED IN GROUPINGS WITH A MAXIMUM MAGNETIC FIELD IN PREDETERMINED RADIAL ZONES SEPARATING THE GROUPS; MEANS FOR APPLYING A STEADY MAGNETIC FIELD TO SAID INTERACTION SPACE SUBSTANTIALLY PARALLEL TO SAID CATHODE; BAFFLE ELEMENTS OF CONDUCTIVE MATERIAL DISPOSED WITHIN THE INTERDIGITAL CAVITY ALONG THE RADIAL ZONES AS SEPARATIONS BETWEEN THE GROUPINGS OF HIGH FREQUENCY MAGNETIC FIELD LINES PECULIAR TO A DESIRED MODE OF OPERATION; AND MEANS FOR MAINTAINING SAID BAFFLES AT A FIXED PREDETERMINED POTENTIAL.
Claim 3
Dependent Claim
115 words
IN THE ANODE ASSEMBLY OF AN INTERDIGITAL MAGNETRON: A CAVITY STRUCTURE; FIRST AND SECOND SETS OF INTERFITTING FINGERS, EACH OF SAID FINGERS INCLUDING ABASE CONNECTED TO SAID CAVITY STRUCTURE AND A TIP EXTENDING AWAY FROM THE POINT OF CONNECTION OF SAID FINGER TO SAID CAVITY; THE TIPS OF SAID FIRST SET OF FINGERS EXTENDING IN ONE DIRECTION; THE TIPS OF SAID SECOND SET OF FINGERS EXTENDING IN THE OPPOSITE DIRECTION; CONDUCTIVE STRAPPING MEANS CONNECTING THE TIPS OF SAID FIRST SET OF FINGERS AND IN INSULATED RELATIONSHIP TO SAID SECOND SET OF FINGERS; AND CONDUCTIVE STRAPPING MEANS CONNECTING THE TIPS OF SAID SECOND SET OF FINGERS AND IN INSULATED RELATIONSHIP TO SAID FIRST SET OF FINGERS.
Claim 4
Dependent Claim
115 words
IN THE ANODE ASSEMBLY OF AN INTERDIGITAL MAGNETRON: A CAVITY STRUCTURE; FIRST AND SECOND SETS OF INTERFITTING FINGERS, EACH OF SAID FINGERS INCLUDING ABASE CONNECTED TO SAID CAVITY STRUCTURE AND A TIP EXTENDING AWAY FROM THE POINT OF CONNECTION OF SAID FINGER TO SAID CAVITY; THE TIPS OF SAID FIRST SET OF FINGERS EXTENDING IN ONE DIRECTION; THE TIPS OF SAID SECOND SET OF FINGERS EXTENDING IN THE OPPOSITE DIRECTION; CONDUCTIVE STRAPPING MEANS CONNECTING THE TIPS OF SAID FIRST SET OF FINGERS AND IN INSULATED RELATIONSHIP TO SAID SECOND SET OF FINGERS; AND CONDUCTIVE STRAPPING MEANS CONNECTING THE TIPS OF SAID SECOND SET OF FINGERS AND IN INSULATED RELATIONSHIP TO SAID FIRST SET OF FINGERS.
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |